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129 results on '"Wiersema, K."'

1. AT2023fhn (the Finch): a Luminous Fast Blue Optical Transient at a large offset from its host galaxy

Author

Chrimes, A. A., Jonker, P. G., Levan, A. J., Coppejans, D. L., Gaspari, N., Gompertz, B. P., Groot, P. J., Malesani, D. B., Mummery, A., Stanway, E. R., and Wiersema, K.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract

Luminous Fast Blue Optical Transients (LFBOTs) - the prototypical example being AT 2018cow - are a rare class of events whose origins are poorly understood. They are characterised by rapid evolution, featureless blue spectra at early times, and luminous X-ray and radio emission. LFBOTs thus far have been found exclusively at small projected offsets from star-forming host galaxies. We present Hubble Space Telescope, Gemini, Chandra and Very Large Array observations of a new LFBOT, AT2023fhn. The Hubble Space Telescope data reveal a large offset (greater than 3.5 half-light radii) from the two closest galaxies, both at a redshift of 0.24. The isolated environment of AT 2023fhn is in stark contrast with previous events, is challenging to explain with most LFBOT progenitor models, and calls into question the homogeneity of LFBOTs as a class., Submitted to MNRASL. 7 pages, 4 figures, 2 tables

Published
2023

2. Dissecting the interstellar medium of a z = 6.3 galaxy

Author

Saccardi, A., Vergani, S.D., Cia, A. De, D’Elia, V., Heintz, K.E., Izzo, L., Palmerio, J.T., Petitjean, P., Rossi, A, Ugarte Postigo, A. de, Christensen, L., Konstantopoulou, C., Levan, A.J., Malesani, D., Møller, P., Ramburuth-Hurt, T., Salvaterra, R., Tanvir, N.R., Thöne, C.C., Vejlgaard, S., Fynbo, J.P.U., Kann, D.A., Schady, P., Watson, D.J., Wiersema, K., Campana, S., Covino, S., Pasquale, M. De, Fausey, H., Hartmann, D.H., Horst, A.J. van der, Jakobsson, P., Palazzi, E., Pugliese, G., Savaglio, S., Starling, R.L.C., Stratta, G., and Zafar, T.

Subjects
Astronomy
Abstract

Contains fulltext : 290732.pdf (Publisher’s version ) (Open Access)

Published
2023

3. The brightest GRB ever detected: GRB 221009A as a highly luminous event at z = 0.151

Author

Malesani, D. B., Levan, A. J., Izzo, L., Postigo, A. de Ugarte, Ghirlanda, G., Heintz, K. E., Kann, D. A., Lamb, G. P., Palmerio, J., Salafia, O. S., Salvaterra, R., Tanvir, N. R., Fernández, J. F. Agüí, Campana, S., Chrimes, A. A., D'Avanzo, P., D'Elia, V., Della Valle, M., De Pasquale, M., Fynbo, J. P. U., Gaspari, N., Gompertz, B. P., Hartmann, D. H., Hjorth, J., Jakobsson, P., Palazzi, E., Pian, E., Pugliese, G., Ravasio, M. E., Rossi, A., Saccardi, A., Schady, P., Schneider, B., Sollerman, J., Starling, R. L. C., Thöne, C. C., van der Horst, A. J., Vergani, S. D., Watson, D., Wiersema, K., Xu, D., and Zafar, T.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Context: The extreme luminosity of gamma-ray bursts (GRBs) makes them powerful beacons for studies of the distant Universe. The most luminous bursts are typically detected at moderate/high redshift, where the volume for seeing such rare events is maximized and the star-formation activity is greater than at z = 0. For distant events, not all observations are feasible, such as at TeV energies. Aims: Here we present a spectroscopic redshift measurement for the exceptional GRB 221009A, the brightest GRB observed to date with emission extending well into the TeV regime. Methods: We used the X-shooter spectrograph at the ESO Very Large Telescope (VLT) to obtain simultaneous optical to near-IR spectroscopy of the burst afterglow 0.5 days after the explosion. Results: The spectra exhibit both absorption and emission lines from material in a host galaxy at z = 0.151. Thus GRB 221009A was a relatively nearby burst with a luminosity distance of 745 Mpc. Its host galaxy properties (star-formation rate and metallicity) are consistent with those of LGRB hosts at low redshift. This redshift measurement yields information on the energy of the burst. The inferred isotropic energy release, $E_{\rm iso} > 5 \times 10^{54}$ erg, lies at the high end of the distribution, making GRB 221009A one of the nearest and also most energetic GRBs observed to date. We estimate that such a combination (nearby as well as intrinsically bright) occurs between once every few decades to once per millennium., 9 pages, 4 figures, submitted to Astronomy & Astrophysics

Published
2023
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4. GRB 080928 afterglow imaging and spectro-polarimetry

Author

Brivio, R., COVINO, Stefano, D'AVANZO, Paolo, Wiersema, K., Maund, J. R., BERNARDINI, Maria Grazia, CAMPANA, Sergio, MELANDRI, Andrea, ITA, and GBR

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Among the large variety of astrophysical sources that we can observe, gamma-ray bursts (GRBs) are the most energetic of the whole Universe. The definition of a general picture describing the physics behind GRBs has always been a compelling task, but the results obtained so far from observations have revealed a puzzling landscape. The lack of a clear, unique paradigm calls for further observations and additional, independent techniques for this purpose. Polarimetry constitutes a very useful example as it allows us to investigate some features of the source such as the geometry of the emitting region and the magnetic field configuration. To date, only a handful of bursts detected by space telescopes have been accompanied by ground-based spectro-polarimetric follow-up, and therefore such an analysis of more GRBs is of crucial importance in order to increase the sample of bursts with multi-epoch polarisation analysis. In this work, we present the analysis of the GRB 080928 optical afterglow, with observations performed with the ESO-VLT FORS1 instrument. We find that the GRB optical afterglow was not significantly polarised on the first observing night. The polarisation degree ($P$) grew on the following night to a level of $P \sim$ 4.5%, giving evidence of polarised radiation at a 4 $\sigma$ confidence level. The GRB 080928 light curve is not fully consistent with standard afterglow models, making any comparison with polarimetric models partly inconclusive. The most conservative interpretation is that the GRB emission was characterised by a homogeneous jet and was observed at an angle of 0.6 $< \theta_{obs}/\theta_{jet}, Comment: 10 pages, 7 figures. Accepted for publication in A&A

Published
2022

5. Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations

Author

Agudo, I., Amati, L., An, T., Bauer, F. E., Benetti, S., Bernardini, M. G., Beswick, R., Bhirombhakdi, K., de Boer, T., Branchesi, M., Brennan, S. J., Caballero-García, M. D., Cappellaro, E., Rodríguez, N. Castro, Castro-Tirado, A. J., Chambers, K. C., Chassande-Mottin, E., Chaty, S., Chen, T. -W., Coleiro, A., Covino, S., D'Ammando, F., D'Avanzo, P., D'Elia, V., Fiore, A., Flörs, A., Fraser, M., Frey, S., Frohmaier, C., Galbany, L., Gall, C., Gao, H., García-Rojas, J., Ghirlanda, G., Giarratana, S., Gillanders, J. H., Giroletti, M., Gompertz, B. P., Gromadzki, M., Heintz, K. E., Hu, Y. -D., Huber, M. E., Inkenhaag, A., Izzo, L., Jin, Z. P., Jonker, P. G., Kann, D. A., Kool, E. C., Kotak, R., Leloudas, G., Levan, A. J., Lin, C. -C., Lyman, J. D., Magnier, E. A., Maguire, K., Mandel, I., Marcote, B., Sánchez, D. Mata, Mattila, S., Melandri, A., Michałowski, M. J., Moldon, J., Nicholl, M., Guelbenzu, A. Nicuesa, Oates, S. R., Onori, F., Orienti, M., Paladino, R., Paragi, Z., Perez-Torres, M., Pian, E., Pignata, G., Piranomonte, S., Quirola-Vásquez, J., Ragosta, F., Rau, A., Ronchini, S., Rossi, A., Sánchez-Ramírez, R., Salafia, O. S., Schulze, S., Smartt, S. J., Smith, K. W., Sollerman, J., Srivastav, S., Starling, R. L. C., Steeghs, D., Stevance, H. F., Testa, V., Torres, M. A. P., Vergani, S. D., Vescovi, D., Wainscost, R., Watson, D., Wiersema, K., Wyrzykowski, Ł., Yang, J., Yang, S., Young, D. R., AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and ENGRAVE

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics - Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We present the results from multi-wavelength observations of a transient discovered during the follow-up of S191213g, a gravitational wave (GW) event reported by the LIGO-Virgo Collaboration as a possible binary neutron star merger in a low latency search. This search yielded SN2019wxt, a young transient in a galaxy whose sky position (in the 80\% GW contour) and distance ($\sim$150\,Mpc) were plausibly compatible with the localisation uncertainty of the GW event. Initially, the transient's tightly constrained age, its relatively faint peak magnitude ($M_i \sim -16.7$\,mag) and the $r-$band decline rate of $\sim 1$\,mag per 5\,days appeared suggestive of a compact binary merger. However, SN2019wxt spectroscopically resembled a type Ib supernova, and analysis of the optical-near-infrared evolution rapidly led to the conclusion that while it could not be associated with S191213g, it nevertheless represented an extreme outcome of stellar evolution. By modelling the light curve, we estimated an ejecta mass of $\sim 0.1\,M_\odot$, with $^{56}$Ni comprising $\sim 20\%$ of this. We were broadly able to reproduce its spectral evolution with a composition dominated by helium and oxygen, with trace amounts of calcium. We considered various progenitors that could give rise to the observed properties of SN2019wxt, and concluded that an ultra-stripped origin in a binary system is the most likely explanation. Disentangling electromagnetic counterparts to GW events from transients such as SN2019wxt is challenging: in a bid to characterise the level of contamination, we estimated the rate of events with properties comparable to those of SN2019wxt and found that $\sim 1$ such event per week can occur within the typical GW localisation area of O4 alerts out to a luminosity distance of 500\,Mpc, beyond which it would become fainter than the typical depth of current electromagnetic follow-up campaigns., By the ENGRAVE collaboration (engrave-eso.org). 35 pages, 20 figures, final version accepted by A&A

Published
2022

6. Polarized kilonovae from black hole–neutron star mergers

Author

Bulla, M., Kyutoku, K., Tanaka, M., Covino, S., Bruten, J.R., Matsumoto, T., Maund, J.R., Testa, V., and Wiersema, K.

Subjects
Astrophysics::Galaxy Astrophysics
Abstract

We predict linear polarization for a radioactively powered kilonova following the merger of a black hole and a neutron star. Specifically, we perform 3D Monte Carlo radiative transfer simulations for two different models, both featuring a lanthanide-rich dynamical ejecta component from numerical-relativity simulations while only one including an additional lanthanide-free disc-wind component. We calculate polarization spectra for nine different orientations at 1.5, 2.5, and 3.5 d after the merger and in the 0.1−2μm wavelength range. We find that both models are polarized at a detectable level 1.5 d after the merger while show negligible levels thereafter. The polarization spectra of the two models are significantly different. The model lacking a disc wind shows no polarization in the optical, while a signal increasing at longer wavelengths and reaching ∼1−6 per cent at 2μm depending on the orientation. The model with a disc-wind component, instead, features a characteristic ‘double-peak’ polarization spectrum with one peak in the optical and the other in the infrared. Polarimetric observations of future events will shed light on the debated neutron richness of the disc-wind component. The detection of optical polarization would unambiguously reveal the presence of a lanthanide-free disc-wind component, while polarization increasing from zero in the optical to a peak in the infrared would suggest a lanthanide-rich composition for the whole ejecta. Future polarimetric campaigns should prioritize observations in the first ∼48 h and in the 0.5−2μm range, where polarization is strongest, but also explore shorter wavelengths/later times where no signal is expected from the kilonova and the interstellar polarization can be safely estimated.

Published
2021

7. Full orbital solution for the binary system in the northern Galactic disk microlensing event Gaia16aye

Author

Wyrzykowski, Ł., D’Ago, G., Hanlon, L., van Heerden, H., Ihanec, N., Jovanovic, M., Kopacki, G., Martin-Carrillo, A., Marais, J., Meintjes, P., Murphy, D., Van Soelen, B., Strubble, E., Szegedi, H., Vernet, D., Vince, O., van der Westhuizen, I., Wium, D., Zhuchkov, R. Ya., Wyrzykowski, Łukasz, Mróz, P., Rybicki, K., Gromadzki, M., Kołaczkowski, Z., Zieliński, M., Zieliński, P., Britavskiy, N., Gomboc, A., Sokolovsky, K., Hodgkin, S., Abe, L., Aldi, G., AlMannaei, A., Altavilla, G., Al Qasim, A., Anupama, G., Awiphan, S., Bachelet, E., Bakış, V., Baker, S., Bartlett, S., Bendjoya, P., Benson, K., Bikmaev, I., Birenbaum, G., Blagorodnova, N., Blanco-Cuaresma, S., Boeva, S., Bonanos, A., Bozza, V., Bramich, D., Bruni, I., Burenin, R., Burgaz, U., Butterley, T., Caines, H., Caton, D., Calchi Novati, S., Carrasco, J., Cassan, A., Čepas, V., Cropper, M., Chruślińska, M., Clementini, G., Clerici, A., Conti, D., Conti, M., Cross, S., Cusano, F., Damljanovic, G., Dapergolas, A., D'ago, G, de Bruijne, J., Dennefeld, M., Dhillon, V., Dominik, M., Dziedzic, J., Erece, O., Eselevich, M., Esenoglu, H., Eyer, L., Figuera Jaimes, R., Fossey, S., Galeev, A., Grebenev, S., Gupta, A., Gutaev, A., Hallakoun, N., Hamanowicz, A., Han, C., Handzlik, B., Haislip, J., Hardy, L., Harrison, D., Hoette, V., Horne, K., Hudec, R., Hundertmark, M., Ihanec 35, N, Irtuganov, E., Itoh, R., Iwanek, P., Janulis, R., Jelínek, M., Jensen, E., Kaczmarek, Z., Katz, D., Khamitov, I., Kilic, Y., Klencki, J., Kolb, U., Kouprianov, V., Kruszyńska, K., Kurowski, S., Latev, G., Lee, C.-H., Leonini, S., Leto, G., Lewis, F., Li, Z., Liakos, A., Littlefair, S., Lu, J., Manser, C., Mao, S., Maoz, D., Maskoliūnas, M., Maund, J., Melnikov, S., Ment, K., Mikołajczyk, P., Morrell, M., Mowlavi, N., Moździerski, D., Nazarov, S., Netzel, H., Nesci, R., Ngeow, C.-C., Norton, A., Ofek, E., Pakštienė, E., Palaversa, L., Pandey, A., Paraskeva, E., PAWLAK, M., Penny, M., Penprase, B., Piascik, A., Prieto, J., Qvam, J., Ranc, C., Rebassa-Mansergas, A., Reichart, D., Reig, P., Rhodes, L., Rivet, J.-P., Rixon, G., Roberts, D., Rosi, P., Russell, D., Zanmar Sanchez, R., Scarpetta, G., Seabroke, G., Shappee, B., Schmidt, R., Shvartzvald, Y., Sitek, M., Skowron, J., Śniegowska, M., Snodgrass, C., Soares, P., Spetsieri, Z., Stankevičiūtė, A., Steele, I., Street, R., Strobl, J., Tinjaca Ramirez, L., Tomasella, L., Tsapras, Y., Villanueva, S., 56, O, Wambsganss, J., Wiersema, K., Wilson, R., Yoldas, A., Ya, R, Zhukov, D., Zdanavičius, J., Zoła, S., Zubareva, A., Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica, Obserwatorium Astronomiczne Uniwersytetu Warszawskiego, Instytut Astronomiczny Uniwersytetu Wrocławskiego, Instituto de Astrofìsica de Canarias, National Science Centre (Poland), European Commission, Ministry of Science and Higher Education (Poland), Science and Technology Facilities Council (UK), Foundation for Polish Science, Slovenian Research Agency, University of Crete, Foundation for Research and Technology, National Research Foundation of Korea, University of Leicester, European Space Agency, National Science Foundation (US), Ministerio de Economía y Competitividad (España), Universidad de Barcelona, Agenzia Spaziale Italiana, Royal Society (UK), Ministry of Science and Technology (Taiwan), The Ohio State University, Chinese Academy of Sciences, Villum Fonden, Research Council of Lithuania, Kazan Federal University, National Aeronautics and Space Administration (US), Ministry of Education, Science and Technological Development (Serbia), W. M. Keck Foundation, Astronomical Observatory [Warsaw], Faculty of Physics [Warsaw] (FUW), University of Warsaw (UW)-University of Warsaw (UW), School of Physics, University College Dublin, Ireland, University of Pretoria [South Africa], Clinical Center of Serbia (KCS), Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, and Ege Üniversitesi

Subjects
Astronomy, Estels binaris, gravitational lensing: micro, techniques: photometric, binaries: general, stars: individual: Gaia16aye-L, Astrophysics, 01 natural sciences, 7. Clean energy, Gaia16aye-L, Gravitational lenses, Bulge, Fotometria astronòmica, QB Astronomy, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, QC, QB, Physics, Gravitational lensing micro, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomical photometry, 3rd-DAS, Orbital period, Radial velocity, Orbit, Astrophysics - Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Stars: individual: Gaia16aye-L, astro-ph.SR, individual: Gaia16aye [Stars], FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Gravitational microlensing, Gravitational lensing: micro, micro [Gravitational lensing], Double stars, 0103 physical sciences, Binaries: general, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Orbital elements, general [Binaries], photometric [Techniques], Binaries, Astronomy and Astrophysics, Light curve, Stars, QC Physics, Space and Planetary Science, Física::Astronomia i astrofísica [Àrees temàtiques de la UPC], Techniques - photometric, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Techniques: photometric, astro-ph.IM
Abstract

Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve exhibited five distinct brightening episodes, reaching up to I = 12 mag, and it was covered in great detail with almost 25 000 data points gathered by a network of telescopes. We present the photometric and spectroscopic follow-up covering 500 days of the event evolution. We employed a full Keplerian binary orbit microlensing model combined with the motion of Earth and Gaia around the Sun to reproduce the complex light curve. The photometric data allowed us to solve the microlensing event entirely and to derive the complete and unique set of orbital parameters of the binary lensing system. We also report on the detection of the first-ever microlensing space-parallax between the Earth and Gaia located at L2. The properties of the binary system were derived from microlensing parameters, and we found that the system is composed of two main-sequence stars with masses 0.57 +/- 0.05 M-circle dot and 0.36 +/- 0.03 M-circle dot at 780 pc, with an orbital period of 2.88 years and an eccentricity of 0.30. We also predict the astrometric microlensing signal for this binary lens as it will be seen by Gaia as well as the radial velocity curve for the binary system. Events such as Gaia16aye indicate the potential for the microlensing method of probing the mass function of dark objects, including black holes, in directions other than that of the Galactic bulge. This case also emphasises the importance of long-term time-domain coordinated observations that can be made with a network of heterogeneous telescopes., Polish National Sci-ence Centre (NCN): HARMONIA NCN grant [2015/18/M/ST9/00544]; Polish National Sci-ence Centre (NCN): OPUS NCN grant [2015/17/B/ST9/03167]; Polish National Sci-ence Centre (NCN): DAINA NCN grant [2017/27/L/ST9/03221]; European CommissionEuropean CommissionEuropean Commission Joint Research Centre [312430, 730890]; Polish Ministry of Higher EducationMinistry of Science and Higher Education, Poland [3040/7.PR/2014/2, DIR/WK/2018/12]; MAESTRO NCN grant [2014/14/A/ST9/00121]; DDT programmes [SW2016b12, A34DDT3]; UK Science and Technology Facilities CouncilUK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC); Foundation for Polish Science (Program START); National Science Center, PolandNational Science Centre, Poland [ETIUDA 2018/28/T/ST9/00096]; Slovenian Research AgencySlovenian Research Agency - Slovenia [P1-0031, J1-8136]; COST Action GWverseEuropean Cooperation in Science and Technology (COST) [CA16104]; National Research Foundation of KoreaNational Research Foundation of Korea [2017R1A4A1015178]; STFCUK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC); European Space Agency under the NELIOTA program [4000112943]; GROWTH project - National Science Foundation [1545949]; MINECO (Spanish Ministry of Economy) [ESP2016-80079-C2-1-R, ESP2014-55996-C2-1-R, RTI2018-095076B-C21]; ICCUB (Unidad de Excelencia a Maria de Maeztu) [MDM-2014-0369]; Agenzia Spaziale Italiana (ASI)Agenzia Spaziale Italiana (ASI) [ASI I/058/10/0, ASI 2014-025-R.1.2015]; Royal Society Research GrantRoyal Society of London [RG170230]; Ministry of Science and Technology (Taiwan)Ministry of Science and Technology, Taiwan [104-2112-M-008-012MY3, 104-2923-M-008-004-MY5]; European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant [320964]; Gordon and Betty Moore FoundationGordon and Betty Moore Foundation [GBMF5490]; NSFNational Science Foundation (NSF) [AST-1515927, AST-0908816, AST-1412587]; Mt. Cuba Astronomical Foundation; Center for Cosmology and AstroParticle Physics at the Ohio State UniversityOhio State University; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA); Villum Foundation; MINECO under the Ramon y Cajal programme [RYC-2016-20254]; MINECO [AYA2017-86274-P]; AGAUR grantAgencia de Gestio D'Ajuts Universitaris de Recerca Agaur (AGAUR) [SGR-661/2017]; Science and Technology Facilities CouncilUK Research & Innovation (UKRI)Science & Technology Facilities Council (STFC) [ST/P000541/1]; STFC consolidated grant [ST/M001296/1]; Research Council of LithuaniaResearch Council of Lithuania (LMTLT) [S-LL-19-2]; TUB.ITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); IKI; KFU; AST; National Science Fund (Bulgaria)National Science Fund of Bulgaria [DN 18/13-12.12.2017]; Institute of Astronomy via research project "Study of ICRF radio-sources and fast variable astronomical objects"; NAO Rozhen, BAS, via research project "Study of ICRF radio-sources and fast variable astronomical objects"; Ministry of Education, Science and Technological Development of the Republic of Serbia [176011, 176004, 176021]; DFGGerman Research Foundation (DFG)European Commission [SPP 1992, WA 1074/11-1]; NCN [2016/21/B/ST9/01126]; MINECO Ramon y Cajal programme [AYA2017-86274-P, RYJ-2016-20254]; Robert Martin Ayers Sciences Fund; National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA) [NNX08AR22G]; National Science FoundationNational Science Foundation (NSF) [AST-1238877]; W. M. Keck FoundationW.M. Keck Foundation; ICCUB (Unidad de Excelencia 'Maria de Maeztu') [MDM-2014-0369]; [3.6714.2017/8.9], This work relies on the results from the European Space Agency (ESA) space mission Gaia. Gaia data are being processed by the Gaia Data Processing and Analysis Consortium (DPAC). Funding for the DPAC is provided by national institutions, in particular the institutions participating in the Gaia Multi-Lateral Agreement (MLA). The Gaia mission website is https://www.cosmos.esa.int/gaia.In particular we acknowledge Gaia Photomet-ric Science Alerts Team, website http://gsaweb.ast.cam.ac.uk/alerts.We thank the members of the OGLE team for discussions and support. We also would like to thank the Polish Children Fund (KFnRD) for support of an internship of their pupils in Ostrowik Observatory of the Warsaw Univ-ersity, during which some of the data were collected, in particular we thank: Robert Nowicki, Michal Por.ebski and Karol Niczyj. The work presented here has been supported by the following grants from the Polish National Sci-ence Centre (NCN): HARMONIA NCN grant 2015/18/M/ST9/00544, OPUS NCN grant 2015/17/B/ST9/03167, DAINA NCN grant 2017/27/L/ST9/03221, as well as European Commission's FP7 and H2020 OPTICON grants (312430 and 730890), Polish Ministry of Higher Education support for OPTICON FP7, 3040/7.PR/2014/2, MNiSW grant DIR/WK/2018/12. PMr and JS acknowledge support from MAESTRO NCN grant 2014/14/A/ST9/00121 to Andrzej Udal-ski. We would like to thank the following members of the AAVSO for their amazing work with collecting vast amounts of data: Teofilo Arranz, James Boardman, Stephen Brincat, Geoff Chaplin, Emery Erdelyi, Rafael Farfan, William Goff, Franklin Guenther, Kevin Hills, Jens Jacobsen, Raymond Kneip, David Lane, Fernando Limon Martinez, Gianpiero Locatelli, Andrea Mantero, Attila Madai, Peter Meadows, Otmar Nickel, Arto Oksanen, Luis Perez, Roger Pieri, Ulisse Quadri, Diego Rodriguez Perez, Frank Schorr, George Sjoberg, Andras Timar, Ray Tomlin, Tonny Vanmunster, Klaus Wenzel, Thomas Wikander. We also thank the amateur observers from around the world, in particular, Pietro Capuozzo, Leone Trascianelli, Igor Zharkov from Ardingly College and Angelo Tomassini, Karl-Ludwig Bath. We also thank Roger Pickard from the British Astronomical Association and Matthias Penselin from the German Haus der Astronomie association for their contributions. KS thanks Dr. Dmitry Chulkov and Dr. Panagiotis Gavras for the interesting discussion of stellar multiplicity. We acknowledge support of DDT programmes SW2016b12 (WHT) and A34DDT3 (TNG). The INT, TNG and WHT are operated on the island of La Palma by the Isaac Newton Group of Telescopes in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. The Liverpool Telescope is operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. SJF would like to thank the UCL students who assisted with the collection and checking of UCLO data for the observing campaign: Martina Aghopian, Ashleigh Arendt, Artem Barinov, Luke Barrett, Jasper Berry-Gair, Arjun Bhogal, Charles Bowesman, William Boyd, Andrei Cuceu, Michael Davies, Max Freedman, Gabriel Fu, Abirami Govindaraju, Iandeep Hothi, Clara Matthews Torres, Darius Modirrousta-Galian, Petru Neague, George Pattinson, Xiaoxi Song, and Brian Yu. P.Mr. acknowledges support from the Foundation for Polish Science (Program START) and the National Science Center, Poland (grant ETIUDA 2018/28/T/ST9/00096).; r r AC, AG and NI acknowledge the financial support from the Slovenian Research Agency (research core funding No. P1-0031 and project grant No. J1-8136)and networking support by the COST Action GWverse CA16104. Skinakas Observatory is a collaborative project of the University of Crete and the Foundation for Research and Technology-Hellas. Work by C.H. was supported by the grant (2017R1A4A1015178) of National Research Foundation of Korea. KW acknowledges funding from STFC, and thanks the University of Lei-cester for the investment in instrumentation. We gratefully acknowledge financial support by the European Space Agency under the NELIOTA program, contract No. 4000112943. This work has made use of data obtained with the Kryoneri Prime Focus Instrument, developed by the European Space Agency NELIOTA project on the 1.2 m Kryoneri telescope, which is operated by IAASARS, National Observatory of Athens, Greece. The Aristarchos tele-scope is operated on Helmos Observatory by the IAASARS of the National Observatory of Athens. This work was supported by the GROWTH project funded by the National Science Foundation under Grant No 1545949. This work was supported by the MINECO (Spanish Ministry of Economy) through grant ESP2016-80079-C2-1-R (MINECO/FEDER, UE) and ESP2014-55996-C2-1-R (MINECO/FEDER, UE) and MDM-2014-0369 of ICCUB (Unidad de Excelencia a Maria de Maeztu). This work was supported by the MINECO (Spanish Ministry of Economy) through grant ESP2016-80079-C2-1-R and RTI2018-095076B-C21 (MINECO/FEDER, UE), and MDM-2014-0369 of ICCUB (Unidad de Excelencia 'Maria de Maeztu'). The Joan Oro Telescope (TJO) of the Montsec Astronomical Observatory (OAdM) is owned by the Catalan Government and is operated by the Institute for Space Studies of Catalonia (IEEC). Support to this study has been provided by Agenzia Spaziale Italiana (ASI) through grants ASI I/058/10/0 and ASI 2014-025-R.1.2015. KW thanks Dipali Thanki and Ray McErlean for their technical support of the scientific programme of the University of Leicester observatory. This work was supported by Royal Society Research Grant RG170230. CCN thanks the funding from Ministry of Science and Technology (Taiwan) under the contracts 104-2112-M-008-012MY3 and 104-2923-M-008-004-MY5. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 320964 (WDTracer). We thank the Las Cumbres Observatory and its sta ff for its continuing support of the project. ASAS-SN is supported by the Gordon and Betty Moore Foundation through grant GBMF5490 to the Ohio State University and NSF grant AST-1515927. Development of ASAS-SN has been supported by NSF grant AST-0908816, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics at the Ohio State University, the Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA), the Villum Foundation, and George Skestos. ARM acknowledges support from the MINECO under the Ramon y Cajal programme (RYC-2016-20254) and the AYA2017-86274-P grant, and the AGAUR grant SGR-661/2017. We acknowledge support from the Science and Technology Facilities Council (TB and RWW; ST/P000541/1). K.Horne acknowledges support from STFC consolidated grant ST/M001296/1. This work was partly supported by the Research Council of Lithuania, grant No. S-LL-19-2 Authors thank to TUB.ITAK, IKI, KFU, and AST for partial supports in using RTT150 (Russian-Turkish 1.5-m telescope in Antalya).; r r This work was partially funded by the subsidy 3.6714.2017/8.9 allocated to Kazan Federal University for the state assignment in the sphere of scientific activities. This research was partially supported by contract DN 18/13-12.12.2017 with the National Science Fund (Bulgaria). Work by YS was supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, California Institute of Technology, administered by Uni-versities Space Research Associ-ation through a contract with NASA. GD gratefully acknowledges the obser-ving grant support from the Institute of Astronomy and NAO Rozhen, BAS, via bilateral joint research project "Study of ICRF radio-sources and fast variable astronomical objects" (PI:G.Damljanovic). This work is a part of the Projects no. 176011 "Dynamics and kinematics of celestial bodies and systems", no. 176004 "Stellar physics" and no. 176021 "Visible and invisible matter in nearby galaxies: theory and observations" supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia. YT acknowledges the support of DFG priority program SPP 1992 "Exploring the diversity of Extrasolar Planets" (WA 1074/11-1). This work of PMi, DM and ZK was supported by the NCN grant no. 2016/21/B/ST9/01126. ARM acknowledges support from the MINECO Ramon y Cajal programme RYJ-2016-20254 and grant AYA2017-86274-P and from the AGAUR grant SGR-661/2017. The work by C. R. was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by USRA through a contract with NASA. The Faulkes Telescope Project is an education partner of Las Cumbres Observatory (LCO). The Faulkes Telescopes are maintained and operated by LCO. This research was made possible through the use of the AAVSO Photomet-ric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund and NSF AST-1412587. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project O ffice, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen's University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incor-porated, the National Central University of Taiwan, the Space Telescope Sci-ence Institute, the National Aeronautics and Space Administration under Grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation Grant No. AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation. Some of the data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Ins-titute of Technology, the University of California and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.

Published
2020

8. International observational campaign of the 2014 eclipse of EE Cephei

Author

Pieńkowski, D. Gałan, C. Tomov, T. Gazeas, K. Wychudzki, P. Mikołajewski, M. Kubicki, D. Staels, B. Zoła, S. Pakońska, P. Dèbski, B. Kundera, T. Ogłoza, W. Dróz, M. Baran, A. Winiarski, M. Siwak, M. DImitrov, D. Kjurkchieva, D. Marchev, D. Armiński, A. Miller, I. Kołaczkowski, Z. Mozdzierski, D. Zahajkiewicz, E. Bruś, P. Pigulski, A. Smela, T. Conseil, E. Boyd, D. Conidis, G.J. Plauchu-Frayn, I. Heras, T.A. Kardasis, E. Biskupski, M. Kneip, R. Hambálek, L. Pribulla, T. Kundra, E. Garai, Z. Rodriguez, D. Kamiński, T. Dubois, F. Logie, L. Capetillo Blanco, A. Kankiewicz, P. Swierczyński, E. Martignoni, M. Sergey, I. Kare Trandem Qvam, J. Semkov, E. Ibryamov, S. Peneva, S. Gonzalez Carballo, J.-L. Ribeiro, J. Dean, S. Apostolovska, G. Donchev, Z. Corp, L. McDonald, P. Rodriguez, M. Sanchez, A. Wiersema, K. Conseil, E. Menke, J. Sergey, I. Richardson, N.

Abstract

Context. EE Cep is one of few eclipsing binary systems with a dark, dusty disc around an invisible object similar to ϵ Aur. The system is characterised by grey and asymmetric eclipses every 5.6 yr that have significant variations in their photometric depth, ranging from ∼0.m5 to ∼2.m0. Aims. The main aim of the observational campaign of the EE Cep eclipse in 2014 was to test the model of disc precession. We expected that this eclipse would be one of the deepest with a depth of ∼2.m0. Methods. We collected multicoloured observations from almost 30 instruments located in Europe and North America. These photometric data cover 243 nights during and around the eclipse. We also analyzed low- and high-resolution spectra from several instruments. Results. The eclipse was shallow with a depth of 0.m71 in the V band. The multicoloured photometry illustrates small colour changes during the eclipse with a total amplitude of order ∼+0.m15 in the B - I colour index. We updated the linear ephemeris for this system by including new times of minima, measured from the three most recent eclipses at epochs E = 9, 10, and 11. We acquired new spectroscopic observations, covering orbital phases around the eclipse, which were not observed in the past and increased the data sample, filling some gaps and giving better insight into the evolution of the Hα and Na » I spectral line profiles during the primary eclipse. Conclusions. The eclipse of EE Cep in 2014 was shallower than expected, measuring 0.m71 instead of ∼2.m0. This means that our model of disc precession needs revision. © ESO 2020.

Published
2020

9. Full orbital solution for the binary system in the northern Galactic disc microlensing event Gaia16aye

Author

Wyrzykowski, Ł. Mróz, P. Rybicki, K.A. Gromadzki, M. Kołaczkowski, Z. Zieliński, M. Zieliński, P. Britavskiy, N. Gomboc, A. Sokolovsky, K. Hodgkin, S.T. Abe, L. Aldi, G.F. Almannaei, A. Altavilla, G. Al Qasim, A. Anupama, G.C. Awiphan, S. Bachelet, E. Baklş, V. Baker, S. Bartlett, S. Bendjoya, P. Benson, K. Bikmaev, I.F. Birenbaum, G. Blagorodnova, N. Blanco-Cuaresma, S. Boeva, S. Bonanos, A.Z. Bozza, V. Bramich, D.M. Bruni, I. Burenin, R.A. Burgaz, U. Butterley, T. Caines, H.E. Caton, D.B. Calchi Novati, S. Carrasco, J.M. Cassan, A. Epas, V. Cropper, M. Chruślińska, M. Clementini, G. Clerici, A. Conti, D. Conti, M. Cross, S. Cusano, F. Damljanovic, G. Dapergolas, A. D'Ago, G. De Bruijne, J.H.J. Dennefeld, M. Dhillon, V.S. Dominik, M. Dziedzic, J. Erece, O. Eselevich, M.V. Esenoglu, H. Eyer, L. Figuera Jaimes, R. Fossey, S.J. Galeev, A.I. Grebenev, S.A. Gupta, A.C. Gutaev, A.G. Hallakoun, N. Hamanowicz, A. Han, C. Handzlik, B. Haislip, J.B. Hanlon, L. Hardy, L.K. Harrison, D.L. Van Heerden, H.J. Hoette, V.L. Horne, K. Hudec, R. Hundertmark, M. Ihanec, N. Irtuganov, E.N. Itoh, R. Iwanek, P. Jovanovic, M.D. Janulis, R. Jelínek, M. Jensen, E. Kaczmarek, Z. Katz, D. Khamitov, I.M. Kilic, Y. Klencki, J. Kolb, U. Kopacki, G. Kouprianov, V.V. Kruszyńska, K. Kurowski, S. Latev, G. Lee, C.-H. Leonini, S. Leto, G. Lewis, F. Li, Z. Liakos, A. Littlefair, S.P. Lu, J. Manser, C.J. Mao, S. Maoz, D. Martin-Carrillo, A. Marais, J.P. Maskoliūnas, M. Maund, J.R. Meintjes, P.J. Melnikov, S.S. Ment, K. Mikołajczyk, P. Morrell, M. Mowlavi, N. Mo Dzierski, D. Murphy, D. Nazarov, S. Netzel, H. Nesci, R. Ngeow, C.-C. Norton, A.J. Ofek, E.O. Pakštienė, E. Palaversa, L. Pandey, A. Paraskeva, E. Pawlak, M. Penny, M.T. Penprase, B.E. Piascik, A. Prieto, J.L. Qvam, J.K.T. Ranc, C. Rebassa-Mansergas, A. Reichart, D.E. Reig, P. Rhodes, L. Rivet, J.-P. Rixon, G. Roberts, D. Rosi, P. Russell, D.M. Zanmar Sanchez, R. Scarpetta, G. Seabroke, G. Shappee, B.J. Schmidt, R. Shvartzvald, Y. Sitek, M. Skowron, J. Niegowska, M. Snodgrass, C. Soares, P.S. Van Soelen, B. Spetsieri, Z.T. Stankevičiūtė, A. Steele, I.A. Street, R.A. Strobl, J. Strubble, E. Szegedi, H. Tinjaca Ramirez, L.M. Tomasella, L. Tsapras, Y. Vernet, D. Villanueva, S. Vince, O. Wambsganss, J. Van Der Westhuizen, I.P. Wiersema, K. Wium, D. Wilson, R.W. Yoldas, A. Zhuchkov, R.Y. Zhukov, D.G. Zdanavičius, J. Zoła, S. Zubareva, A.

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Gaia16aye was a binary microlensing event discovered in the direction towards the northern Galactic disc and was one of the first microlensing events detected and alerted to by the Gaia space mission. Its light curve exhibited five distinct brightening episodes, reaching up to I? =? 12 mag, and it was covered in great detail with almost 25 000 data points gathered by a network of telescopes. We present the photometric and spectroscopic follow-up covering 500 days of the event evolution. We employed a full Keplerian binary orbit microlensing model combined with the motion of Earth and Gaia around the Sun to reproduce the complex light curve. The photometric data allowed us to solve the microlensing event entirely and to derive the complete and unique set of orbital parameters of the binary lensing system. We also report on the detection of the first-ever microlensing space-parallax between the Earth and Gaia located at L2. The properties of the binary system were derived from microlensing parameters, and we found that the system is composed of two main-sequence stars with masses 0.57 ± 0.05 M? and 0.36 ± 0.03 M? at 780 pc, with an orbital period of 2.88 years and an eccentricity of 0.30. We also predict the astrometric microlensing signal for this binary lens as it will be seen by Gaia as well as the radial velocity curve for the binary system. Events such as Gaia16aye indicate the potential for the microlensing method of probing the mass function of dark objects, including black holes, in directions other than that of the Galactic bulge. This case also emphasises the importance of long-term time-domain coordinated observations that can be made with a network of heterogeneous telescopes. © ESO 2020.

Published
2020

10. New constraints on the physical conditions in H 2 -bearing GRB-host damped Lyman- α absorbers

Author

Heintz, K. E., Bolmer, J., Ledoux, C., Noterdaeme, P., Krogager, J.-K., Fynbo, J. P. U., Jakobsson, P., Covino, S., D'Elia, V., De Pasquale, M., Hartmann, D. H., Izzo, L., Japelj, J., Kann, D. A., Kaper, L., Petitjean, P., Rossi, A., Salvaterra, R., Schady, P., Selsing, J., Starling, R., Tanvir, N. R., Thöne, C. C., De Ugarte Postigo, A., Vergani, S. D., Watson, D., Wiersema, K., Zafar, T., D’Elia, V., Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre for Astrophysics and Cosmology [Reykjavik], Science Institute [Reykjavik], University of Iceland [Reykjavik]-University of Iceland [Reykjavik], Max-Planck-Institut für Extraterrestrische Physik (MPE), European Southern Observatory [Santiago] (ESO), European Southern Observatory (ESO), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Niels Bohr Institute [Copenhagen] (NBI), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), INAF - Osservatorio Astronomico di Roma (OAR), Istanbul University, Clemson University, Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Anton Pannekoek Institute for Astronomy, University of Amsterdam [Amsterdam] (UvA), Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, INAF–IASF Bologne, University of Leicester, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Icelandic Research Fund, Agence Nationale de la Recherche (France), Ministerio de Economía y Competitividad (España), European Commission, Ministerio de Ciencia, Innovación y Universidades (España), Low Energy Astrophysics (API, FNWI), and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Subjects
gamma-ray burst: general, Astrophysics, general [gamma-ray burst], 01 natural sciences, Spectral line, chemistry.chemical_compound, galaxies: high-redshift, 0103 physical sciences, Absorption (logic), 010303 astronomy & astrophysics, Physics, Very Large Telescope, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, extinction, Hydrogen molecule, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, ISM: molecules, molecules [ism], Afterglow, ism [galaxies], individual: 181020a and 190114a [gamma-ray burst], [PHYS.ASTR.GA]Physics [physics]/Astrophysics [astro-ph]/Galactic Astrophysics [astro-ph.GA], chemistry, 13. Climate action, Space and Planetary Science, Content (measure theory), gamma-ray burst: individual: 181020A and 190114A, dust, extinction, dust, Atomic carbon, Gamma-ray burst, high-redshift [galaxies], galaxies: ISM
Abstract

We report the detections of molecular hydrogen (H-2), vibrationally-excited H-2 (H-2*), and neutral atomic carbon (C I), an efficient tracer of molecular gas, in two new afterglow spectra of GRBs 181020A (z = 2.938) and 190114A (z = 3.376), observed with X-shooter at the Very Large Telescope (VLT). Both host-galaxy absorption systems are characterized by strong damped Lyman-alpha absorbers (DLAs) and substantial amounts of molecular hydrogen with log N(H I, H-2) = 22.20 +/- 0.05, 20.40 +/- 0.04 (GRB 181020A) and log N(H I, H-2) = 22.15 +/- 0.05, 19.44 +/- 0.04 (GRB 190114A). The DLA metallicites, depletion levels, and dust extinctions are within the typical regimes probed by GRBs with [Zn/H] = -1.57 +/- 0.06, [Zn/Fe] = 0.67 +/- 0.03, and A(v) = 0.27 +/- 0.02 mag (GRB 181020A) and [Zn/H] = -1.23 +/- 0.07, [Zn/Fe] = 1.06 +/- 0.08, and A(v) = 0.36 +/- 0.02 mag (GRB 190114A). In addition, we examine the molecular gas content of all known H-2-bearing GRB-DLAs and explore the physical conditions and characteristics required to simultaneously probe C I and H-2*. We confirm that H-2 is detected in all C I- and H-2*-bearing GRB absorption systems, but that these rarer features are not necessarily detected in all GRB H-2 absorbers. We find that a large molecular fraction of f(H2) greater than or similar to 10(-3) is required for C I to be detected. The defining characteristic for H-2* to be present is less clear, though a large H-2 column density is an essential factor. We also find that the observed line profiles of the molecular-gas tracers are kinematically >cold>, with small velocity offsets of delta v < 20 km s(-1) from the bulk of the neutral absorbing gas. We then derive the H-2 excitation temperatures of the molecular gas and find that they are relatively low with T-ex approximate to 100-300 K, however, there could be evidence of warmer components populating the high-J H-2 levels in GRBs 181020A and 190114A. Finally, we demonstrate that even though the X-shooter GRB afterglow campaign has been successful in recovering several H-2-bearing GRB-host absorbers, this sample is still hampered by a significant dust bias excluding the most dust-obscured H-2 absorbers from identification. C I and H-2* could open a potential route to identify molecular gas even in low-metallicity or highly dust-obscured bursts, though they are only efficient tracers for the most H-2-rich GRB-host absorption systems.© ESO 2019, We would like to thank the referee for a clear, concise, and timely report. KEH and PJ acknowledge support by a Project Grant (162948051) from The Icelandic Research Fund. PN and JKK acknowledge support from the French Agence Nationale de la Recherche under contract ANR-17-CE31-0011-01 (Projet >HIH2>, PI Noterdaeme) and are grateful to the European Southern Observatory for hospitality and support during a visit to the ESO headquarters in Chile. The Cosmic Dawn Center is funded by the DNRF. AdUP, CCT, DAK and LI acknowledge support from the Spanish research project AYA2017-89384-P, and from the State Agency for Research of the Spanish MCIU through the >Center of Excellence Severo Ochoa> award for the Insituto de Astrofisica de Andalucia (SEV-2017-0709). AdUP and CCT acknowledge support from Ramon y Cajal fellowships (RyC-2012-09975 and RyC-2012-09984). LI acknowledges support from a Juan de la Cierva Incorporacion fellowship (IJCI-2016-30940).

Published
2019

11. New constraints on the physical conditions in H$_2$-bearing GRB-host damped Lyman-$��$ absorbers

Author

Heintz, K. E., Bolmer, J., Ledoux, C., Noterdaeme, P., Krogager, J. -K., Fynbo, J. P. U., Jakobsson, P., Covino, S., D'Elia, V., De Pasquale, M., Hartmann, D. H., Izzo, L., Japelj, J., Kann, D. A., Kaper, L., Petitjean, P., Rossi, A., Salvaterra, R., Schady, P., Selsing, J., Starling, R., Tanvir, N. R., Th��ne, C. C., Postigo, A. de Ugarte, Vergani, S. D., Watson, D., Wiersema, K., and Zafar, T.

Subjects
Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences
Abstract

We report the detections of molecular hydrogen (H$_2$), vibrationally-excited H$_2$ (H$^*_2$), and neutral atomic carbon (CI), in two new afterglow spectra of GRBs\,181020A ($z=2.938$) and 190114A ($z=3.376$), observed with X-shooter at the Very Large Telescope (VLT). Both host-galaxy absorption systems are characterized by strong damped Lyman-$��$ absorbers (DLAs) and substantial amounts of molecular hydrogen with $\log N$(HI, H$_2$) = $22.20\pm 0.05,~20.40\pm 0.04$ (GRB\,181020A) and $\log N$(HI, H$_2$) = $22.15\pm 0.05,~19.44\pm 0.04$ (GRB\,190114A). The DLA metallicites, depletion levels and dust extinctions are [Zn/H] = $-1.57\pm 0.06$, [Zn/Fe] = $0.67\pm 0.03$, and $A_V = 0.27\pm 0.02$\,mag (GRB\,181020A) and [Zn/H] = $-1.23\pm 0.07$, [Zn/Fe] = $1.06\pm 0.08$, and $A_V = 0.36\pm 0.02$\,mag (GRB\,190114A). We then examine the molecular gas content of all known H$_2$-bearing GRB-DLAs and explore the physical conditions and characteristics of these systems. We confirm that H$_2$ is detected in all CI- and H$^*_2$-bearing GRB absorption systems, but that these rarer features are not necessarily detected in all GRB H$_2$ absorbers. We find that a large molecular fraction of $f_{\rm H_2} \gtrsim 10^{-3}$ is required for CI to be detected. The defining characteristic for H$^*_2$ to be present is less clear, though a large H$_2$ column density is an essential factor. We then derive the H$_2$ excitation temperatures of the molecular gas and find that they are relatively low with $T_{\rm ex} \approx 100 - 300$\,K, however, there could be evidence of warmer components populating the high-$J$ H$_2$ levels in GRBs\,181020A and 190114A. Finally, we demonstrate that the otherwise successful X-shooter GRB afterglow campaign is hampered by a significant dust bias excluding the most dust-obscured H$_2$ absorbers from identification [Abridged]., 15 pages, 15 figures + Appendix. Accepted for publication in A&A

Published
2019
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12. Signatures of a jet cocoon in early spectra of a supernova associated with a $��$-ray burst

Author

Izzo, L., Postigo, A. de Ugarte, Maeda, K., Th��ne, C. C., Kann, D. A., Della Valle, M., Carracedo, A. Sagues, Micha��owski, M. J., Schady, P., Schmidl, S., Selsing, J., Starling, R. L. C., Suzuki, A., Bensch, K., Bolmer, J., Campana, S., Cano, Z., Covino, S., Fynbo, J. P. U., Hartmann, D. H., Heintz, K. E., Hjorth, J., Japelj, J., Kami��ski, K., Kaper, L., Kouveliotou, C., Kru��y��ski, M., Kwiatkowski, T., Leloudas, G., Levan, A. J., Malesani, D. B., Micha��owski, T., Piranomonte, S., Pugliese, G., Rossi, A., S��nchez-Ram��rez, R., Schulze, S., Steeghs, D., Tanvir, N. R., Ulaczyk, K., Vergani, S. D., and Wiersema, K.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Long gamma-ray bursts mark the death of massive stars, as revealed by their association with energetic broad-lined stripped-envelope supernovae. The scarcity of nearby events and the brightness of the GRB afterglow, dominating the first days of emission, have so far prevented the study of the very early stages of the GRB-SN evolution. Here we present detailed, multi-epoch spectroscopic observations of SN 2017iuk, associated with GRB 171205A which display features at extremely high expansion velocities of $\sim$ 100,000 km s$^{-1}$ within the first day after the burst. These high-velocity components are characterized by chemical abundances different from those observed in the ejecta of SN 2017iuk at later times. Using spectral synthesis models developed for the SN 2017iuk, we explain these early features as originating not from the supernova ejecta, but from a hot cocoon generated by the energy injection of a mildly-relativistic GRB jet expanding into the medium surrounding the progenitor star. This cocoon becomes rapidly transparent and is outshone by the supernova emission which starts dominating three days after the burst. These results proves that the jet plays an important role not only in powering the GRB event but also its associated supernova., 30 pages, 11 figures, 4 tables. Original author manuscript version of a Letter published in Nature journal. Full article available at https://goo.gl/7y9ZeM

Published
2019
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13. ThunderKAT: The MeerKAT Large Survey Project for Image-Plane Radio Transients

Author

O'Brien, Timothy, Woudt, Patrick, Fender, Rob, Corbel, S, Coriat, M., Falke, Heino, Girard, J N, Daigne, F, Heywood, Ian, Horesh, A, Horrell, J., {Jonker}, P, Joseph, T, Kamble, A, Knogge, C, Koerding, E, Kotze, M, Kouveliotou, C, Lynch, C, Maccarone, T, Meintjes, P, Migliari, S, Murphy, T, Nagayama, T, Nelemans, G, Nicholson, G, O'Brien, T, Oodendaal, A, Oozeer, N, Osborne, J, Peres-Torres, M, Ratcliffe, S, Ribeiro, V.A.R.M., Rol, E, Rushton, A, Scaife, A, Schurch, M, Sivakoff, G, Staley, T, Steeghs, D, Stewart, I, Swinbank, J D, Vergani, S, Warner, B, Wiersema, K, Armstrong, R, Groot, P, McBride, V, Miller-Jones, J.C.A., Mooley, K, Stappers, B, Wijers, R.A.M.J., Bietenholz, M, Blyth, S, Boettcher, M, Buckley, D, Charles, P, Chomiuk, L, Coppejans, D, de Blok, W.J.G., van der Heyden, K, van der Horst, A, van Soelen, B, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Unité Scientifique de la Station de Nançay (USN), Université d'Orléans (UO)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire AIM, Université Paris Diderot - Paris 7 ( UPD7 ) -Centre d'Etudes de Saclay, Unité Scientifique de la Station de Nançay ( USN ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université d'Orléans ( UO ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de recherche en astrophysique et planétologie ( IRAP ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'Astrophysique de Paris ( IAP ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Galaxies, Etoiles, Physique, Instrumentation ( GEPI ), and Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysical Processes, 010308 nuclear & particles physics, Computer science, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], media_common.quotation_subject, FOS: Physical sciences, Astronomy, Image plane, 01 natural sciences, 7. Clean energy, Sky, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, media_common
Abstract

ThunderKAT is the image-plane transients programme for MeerKAT. The goal as outlined in 2010, and still today, is to find, identify and understand high-energy astrophysical processes via their radio emission (often in concert with observations at other wavelengths). Through a comprehensive and complementary programme of surveying and monitoring Galactic synchrotron transients (across a range of compact accretors and a range of other explosive phenomena) and exploring distinct populations of extragalactic synchrotron transients (microquasars, supernovae and possibly yet unknown transient phenomena) - both from direct surveys and commensal observations - we will revolutionise our understanding of the dynamic and explosive transient radio sky. As well as performing targeted programmes of our own, we have made agreements with the other MeerKAT large survey projects (LSPs) that we will also search their data for transients. This commensal use of the other surveys, which remains one of our key programme goals in 2016, means that the combined MeerKAT LSPs will produce by far the largest GHz-frequency radio transient programme to date., To be published in "MeerKAT Science: On the Pathway to the SKA". Proceedings of Science. Workshop held 25-27 May, 2016 Stellenbosch, South Africa

Published
2018

14. Shedding Light on the Geometry of Kilonovae

Author

Bulla, M., COVINO, Stefano, Patat, F., Kyutoku, K., Maund, J. R., Tanaka, M., Toma, K., Wiersema, K., D'AVANZO, Paolo, Higgins, A. B., Mundell, C. G., and PALAZZI, ELIANA

Abstract

We present the first results of a campaign aimed at characterising the linear polarisation signals and thus the geometry of binary neutron star mergers (i.e., kilonovae). We carried out the first polarimetric observations of a kilonova called AT 2017gfo, using the FOcal Reducer/low dispersion Spectrograph 2 (FORS2). We predicted for the first time the polarisation signatures expected from kilonovae and highlighted the best strategy to detect linear polarisation in future events. Our studies demonstrate how the detection of polarisation will constrain crucial parameters of these systems, such as the inclination and composition, distribution and extent of the different components of the ejecta., Published in The Messenger vol. 174, pp. 34-36, December 2018.

Published
2018
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15. The host galaxy of the short GRB 111117A at z = 2.211

Author

Selsing, J., Krühler, T., Malesani, D., D’Avanzo, P., Schulze, S., Vergani, S. D., Palmerio, J., Japelj, J., Milvang-Jensen, B., Watson, D., Jakobsson, P., Bolmer, J., Cano, Z., Covino, S., D’Elia, V., de Ugarte Postigo, A., Fynbo, J. P. U., Gomboc, A., Heintz, K. E., Kaper, L., Levan, A. J., Piranomonte, S., Pugliese, G., Sánchez-Ramírez, R., Sparre, M., Tanvir, N. R., Thöne, C. C., and Wiersema, K.

Published
2018
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16. XIPE: the x-ray imaging polarimetry explorer

Author

Soffitta, P., Bellazzini, R., Bozzo, E., Burwitz, V., Castro Tirado, A. J., Costa, E., Courvoisier, T., Feng, H., Gburek, S., Goosmann, R., Karas, V., Boettcher, M., Bogdanov, S., Bombaci, I., Bonino, R., Braga, J., Brandt, W., Brez, A., Bucciantini, N., Burderi, L., Caiazzo, I., Matt, G., Campana, R., Campana, S., Capitanio, F., Cappi, M., Cardillo, M., Casella, P., Catmabacak, O., Cenko, B., Cerda Duran, P., Cerruti, C., Muleri, F., Chaty, S., Chauvin, M., Chen, Y., Chenevez, J., Chernyakova, M., Cheung Teddy, C. C., Christodoulou, D., Connell, P., Corbet, R., Coti Zelati, F., Nandra, K., Covino, S., Cui, W., Cusumano, G., D'Ai, A., D'Ammando, F., Dadina, M., Dai, Z., De Rosa, A., De Ruvo, L., Degenaar, N., Pearce, M., Del Santo, M., Del Zanna, L., Dewangan, G., Di Cosimo, S., Di Lalla, N., Di Persio, G., Di Salvo, T., Dias, T., Done, C., Dovciak, M., Poutanen, J., Doyle, G., Ducci, L., Elsner, R., Enoto, T., Escada, J., Esposito, P., Eyles, C., Fabiani, S., Falanga, M., Falocco, S., Reglero, V., Fan, Y., Fender, R., Feroci, M., Ferrigno, C., Forman, W., Foschini, L., Fragile, C., Fuerst, F., Fujita, Y., Gasent Blesa, J. L., Sabau Maria, D., Gelfand, J., Gendre, B., Ghirlanda, G., Ghisellini, G., Giroletti, M., Goetz, D., Gogus, E., Gomez, J. L., Gonzalez, D., Gonzalez Riestra, R., Santangelo, A., Gotthelf, E., Gou, L., Grandi, P., Grinberg, V., Grise, F., Guidorzi, C., Gurlebeck, N., Guver, T., Haggard, D., Hardcastle, M., Tagliaferri, G., Hartmann, D., Haswell, C., Heger, A., Hernanz, M., Heyl, J., Ho, L., Hoormann, J., Horak, J., Huovelin, J., Huppenkothen, D., Tenzer, C., Iaria, R., Inam Sitki, C., Ingram, A., Israel, G., Izzo, L., Burgess, M., Jackson, M., Ji, L., Jiang, J., Vink, J., Johannsen, T., Jones, C., Jorstad, S., Kajava, J. J. E., Kalamkar, M., Kalemci, E., Kallman, T., Kamble, A., Kislat, F., Kiss, M., Weisskopf, M. C., Klochkov, D., Koerding, E., Kolehmainen, M., Koljonen, K., Komossa, S., Kong, A., Korpela, S., Kowalinski, M., Krawczynski, H., Kreykenbohm, I., Zane, S., Kuss, M., Lai, D., Lan, M., Larsson, J., Laycock, S., Lazzati, D., Leahy, D., Li, H., Li, J., L. X., Li, Agudo, I., Li, T., Li, Z., Linares, M., Lister, M., Liu, H., Lodato, G., Lohfink, A., Longo, F., Luna, G., Lutovinov, A., Antonelli, A., Mahmoodifar, S., Maia, J., Mainieri, V., Maitra, C., Maitra, D., Majczyna, A., Maldera, S., Malyshev, D., Manfreda, A., Manousakis, A., Attina, P., Manuel, R., Margutti, R., Marinucci, A., Markoff, S., Marscher, A., Marshall, H., Massaro, F., Mclaughlin, M., Medina Tanco, G., Mehdipour, M., Baldini, L., Middleton, M., Mignani, R., Mimica, P., Mineo, T., Mingo, B., Miniutti, G., Mirac, S. M., Morlino, G., Motlagh, A. V., Motta, S. E., Bykov, A., Mushtukov, A., Nagataki, S., Nardini, F., Nattila, J., Navarro, G. J., Negri, B., Negro, M., Nenonen, S., Neustroev, V., Nicastro, F., Carpentiero, R., Norton, A., Nucita, A., O'Brien, P., O'Dell, S., Odaka, H., Olmi, B., Omodei, N., Orienti, M., Orlandini, M., Osborne, J., Cavazzuti, E., Pacciani, L., Paliya, V. S., Papadakis, I., Papitto, A., Paragi, Z., Pascal, P., Paul, B., Pavan, L., Pellizzoni, A., Perinati, E., Churazov, E., Pesce Rollins, M., Piconcelli, E., Pili, A. G., Pilia, M., Pohl, M., Ponti, G., Porquet, D., Possenti, A., Postnov, K., Prandoni, I., Del Monte, E., Produit, N., Puehlhofer, G., Ramsey, B., Razzano, M., Rea, N., Reig, P., Reinsch, K., Reiprich, T., Reynolds, M., Risaliti, G., De Martino, D., Roberts, T., Rodriguez, J., Rossi, M. E., Rosswog, S., Rozanska, A., Rubini, A., Rudak, B., Russell, D., Ryde, F., Sabatini, S., Donnarumma, I., Sala, G., Salvati, M., Sasaki, M., Savolainen, T., Saxton, R., Scaringi, S., Schawinski, K., Schulz, N. S., Schwope, A., Severgnini, P., Doroshenko, V., Sharon, M., Shaw, A., Shearer, A., Shesheng, X., Shih, I. C., Silva, K., Silva, R., Silver, E., Smale, A., Spada, F., Evangelista, Y., Spandre, G., Stamerra, A., Stappers, B., Starrfield, S., Stawarz, L., Stergioulas, N., Stevens, A., Stiele, H., Suleimanov, V., Sunyaev, R., Ferreira, I., Slowikowska, A., Tamborra, F., Tavecchio, F., Taverna, Roberto, Tiengo, A., Tolos, L., Tombesi, F., Tomsick, J., Tong, H., Torok, G., Gallo, E., Torres, D. F., Tortosa, A., Tramacere, A., Trimble, V., Trinchieri, G., Tsygankov, S., Tuerler, M., Turriziani, S., Ursini, F., Uttley, P., Grosso, N., Varniere, P., Vincent, F., Vurgun, E., Wang, C., Wang, Z., Watts, A., Wheeler, J. C., Wiersema, K., Wijnands, R., Wilms, J., Kaaret, P., Wolter, A., Wood, K., Wu, K., Wu, X., Xiangyu, W., Xie, F., Xu, R., Yan, S. P., Yang, J., Yu, W., Kuulkers, E., Yuan, F., Zajczyk, A., Zanetti, D., Zanin, R., Zanni, C., Zappacosta, L., Zdziarski, A. A., Zech, A., Zhang, H., Zhang, S., Laranaga, J., Zhang, W., Zoghbi, A., Latronico, L., Lumb, D. H., Macian, J., Malzac, J., Marin, F., Massaro, E., Minuti, M., Mundell, C., Ness, J. U., Oosterbroek, T., Paltani, S., Pareschi, G., Perna, R., Petrucci, P. O., Pinazo, H. B., Pinchera, M., Rodriguez, J. P., Roncadelli, M., Santovincenzo, A., Sazonov, S., Sgro, C., Spiga, D., Svoboda, J., Theobald, C., Theodorou, T., Turolla, Roberto, Wilhelmi De Ona, E., Winter, B., Akbar, A. M., Allan, H., Aloisio, R., Altamirano, D., Amati, L., Amato, E., Angelakis, E., Arezu, J., Atteia, J. L., Axelsson, M., Bachetti, M., Ballo, L., Balman, S., Bandiera, R., Barcons, X., Basso, S., Baykal, A., Becker, W., Behar, E., Beheshtipour, B., Belmont, R., Berger, E., Bernardini, F., Bianchi, S., Bisnovatyi Kogan, G., Blasi, P., Blay, P., Bodaghee, A., Boer, M., Gravitation and Astroparticle Physics Amsterdam, API (FNWI), den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Soffitta, P., Bellazzini, R., Bozzo, E., Burwitz, V., Castro-Tirado, A. J., Costa, E., Courvoisier, T., Feng, H., Gburek, S., Goosmann, R., Karas, V., Matt, G., Muleri, F., Nandra, K., Pearce, M., Poutanen, J., Reglero, V., Sabau Maria, D., Santangelo, A., Tagliaferri, G., Tenzer, C., Vink, J., Weisskopf, M. C., Zane, S., Agudo, I., Antonelli, A., Attina, P., Baldini, L., Bykov, A., Carpentiero, R., Cavazzuti, E., Churazov, E., Del Monte, E., De Martino, D., Donnarumma, I., Doroshenko, V., Evangelista, Y., Ferreira, I., Gallo, E., Grosso, N., Kaaret, P., Kuulkers, E., Laranaga, J., Latronico, L., Lumb, D. H., Macian, J., Malzac, J., Marin, F., Massaro, E., Minuti, M., Mundell, C., Ness, J. U., Oosterbroek, T., Paltani, S., Pareschi, G., Perna, R., Petrucci, P. -O., Pinazo, H. B., Pinchera, M., Rodriguez, J. P., Roncadelli, M., Santovincenzo, A., Sazonov, S., Sgro, C., Spiga, D., Svoboda, J., Theobald, C., Theodorou, T., Turolla, R., Wilhelmi De Ona, E., Winter, B., Akbar, A. M., Allan, H., Aloisio, R., Altamirano, D., Amati, L., Amato, E., Angelakis, E., Arezu, J., Atteia, J. -L., Axelsson, M., Bachetti, M., Ballo, L., Balman, S., Bandiera, R., Barcons, X., Basso, S., Baykal, A., Becker, W., Behar, E., Beheshtipour, B., Belmont, R., Berger, E., Bernardini, F., Bianchi, S., Bisnovatyi-Kogan, G., Blasi, P., Blay, P., Bodaghee, A., Boer, M., Boettcher, M., Bogdanov, S., Bombaci, I., Bonino, R., Braga, J., Brandt, W., Brez, A., Bucciantini, N., Burderi, L., Caiazzo, I., Campana, R., Campana, S., Capitanio, F., Cappi, M., Cardillo, M., Casella, P., Catmabacak, O., Cenko, B., Cerda-Duran, P., Cerruti, C., Chaty, S., Chauvin, M., Chen, Y., Chenevez, J., Chernyakova, M., Cheung Teddy, C. C., Christodoulou, D., Connell, P., Corbet, R., Coti Zelati, F., Covino, S., Cui, W., Cusumano, G., D'Ai, A., D'Ammando, F., Dadina, M., Dai, Z., De Rosa, A., De Ruvo, L., Degenaar, N., Del Santo, M., Del Zanna, L., Dewangan, G., Di Cosimo, S., Di Lalla, N., Di Persio, G., Di Salvo, T., Dias, T., Done, C., Dovciak, M., Doyle, G., Ducci, L., Elsner, R., Enoto, T., Escada, J., Esposito, P., Eyles, C., Fabiani, S., Falanga, M., Falocco, S., Fan, Y., Fender, R., Feroci, M., Ferrigno, C., Forman, W., Foschini, L., Fragile, C., Fuerst, F., Fujita, Y., Gasent-Blesa, J. L., Gelfand, J., Gendre, B., Ghirlanda, G., Ghisellini, G., Giroletti, M., Goetz, D., Gogus, E., Gomez, J. -L., Gonzalez, D., Gonzalez-Riestra, R., Gotthelf, E., Gou, L., Grandi, P., Grinberg, V., Grise, F., Guidorzi, C., Gurlebeck, N., Guver, T., Haggard, D., Hardcastle, M., Hartmann, D., Haswell, C., Heger, A., Hernanz, M., Heyl, J., Ho, L., Hoormann, J., Horak, J., Huovelin, J., Huppenkothen, D., Iaria, R., Inam Sitki, C., Ingram, A., Israel, G., Izzo, L., Burgess, M., Jackson, M., Ji, L., Jiang, J., Johannsen, T., Jones, C., Jorstad, S., Kajava, J. J. E., Kalamkar, M., Kalemci, E., Kallman, T., Kamble, A., Kislat, F., Kiss, M., Klochkov, D., Koerding, E., Kolehmainen, M., Koljonen, K., Komossa, S., Kong, A., Korpela, S., Kowalinski, M., Krawczynski, H., Kreykenbohm, I., Kuss, M., Lai, D., Lan, M., Larsson, J., Laycock, S., Lazzati, D., Leahy, D., Li, H., Li, J., Li, L. -X., Li, T., Li, Z., Linares, M., Lister, M., Liu, H., Lodato, G., Lohfink, A., Longo, F., Luna, G., Lutovinov, A., Mahmoodifar, S., Maia, J., Mainieri, V., Maitra, C., Maitra, D., Majczyna, A., Maldera, S., Malyshev, D., Manfreda, A., Manousakis, A., Manuel, R., Margutti, R., Marinucci, A., Markoff, S., Marscher, A., Marshall, H., Massaro, F., Mclaughlin, M., Medina-Tanco, G., Mehdipour, M., Middleton, M., Mignani, R., Mimica, P., Mineo, T., Mingo, B., Miniutti, G., Mirac, S. M., Morlino, G., Motlagh, A. V., Motta, S. E., Mushtukov, A., Nagataki, S., Nardini, F., Nattila, J., Navarro, G. J., Negri, B., Negro, M., Nenonen, S., Neustroev, V., Nicastro, F., Norton, A., Nucita, A., O'Brien, P., O'Dell, S., Odaka, H., Olmi, B., Omodei, N., Orienti, M., Orlandini, M., Osborne, J., Pacciani, L., Paliya, V. S., Papadakis, I., Papitto, A., Paragi, Z., Pascal, P., Paul, B., Pavan, L., Pellizzoni, A., Perinati, E., Pesce-Rollins, M., Piconcelli, E., Pili, A. G., Pilia, M., Pohl, M., Ponti, G., Porquet, D., Possenti, A., Postnov, K., Prandoni, I., Produit, N., Puehlhofer, G., Ramsey, B., Razzano, M., Rea, N., Reig, P., Reinsch, K., Reiprich, T., Reynolds, M., Risaliti, G., Roberts, T., Rodriguez, J., Rossi, M. E., Rosswog, S., Rozanska, A., Rubini, A., Rudak, B., Russell, D., Ryde, F., Sabatini, S., Sala, G., Salvati, M., Sasaki, M., Savolainen, T., Saxton, R., Scaringi, S., Schawinski, K., Schulz, N. 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Subjects
X-ray Astronomy, High-energy astronomy, Polarimetry, X-ray optics, X-ray telescope, Condensed Matter Physic, 01 natural sciences, Observatory, 0103 physical sciences, Electronic, Optical and Magnetic Materials, Spectral resolution, Electrical and Electronic Engineering, 010303 astronomy & astrophysics, Gas Pixel Detector, Physics, X-ray astronomy, ta115, 010308 nuclear & particles physics, Electronic, Optical and Magnetic Material, Applied Mathematics, Vega, Astronomy, Computer Science Applications1707 Computer Vision and Pattern Recognition, Condensed Matter Physics, Computer Science Applications, Applied Mathematic, Electronic, Optical and Magnetic Materials, Computer Vision and Pattern Recognition, X-ray optic
Abstract

XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to X-ray Astronomy. At the time of writing XIPE is in a competitive phase A as fourth medium size mission of ESA (M4). It promises to reopen the polarimetry window in high energy Astrophysics after more than 4 decades thanks to a detector that efficiently exploits the photoelectric effect and to X-ray optics with large effective area. XIPE uniqueness is time-spectrally-spatially- resolved X-ray polarimetry as a breakthrough in high energy astrophysics and fundamental physics. Indeed the payload consists of three Gas Pixel Detectors at the focus of three X-ray optics with a total effective area larger than one XMM mirror but with a low weight. The payload is compatible with the fairing of the Vega launcher. XIPE is designed as an observatory for X-ray astronomers with 75 % of the time dedicated to a Guest Observer competitive program and it is organized as a consortium across Europe with main contributions from Italy, Germany, Spain, United Kingdom, Poland, Sweden.

Published
2016

17. Multi-messenger Observations of a Binary Neutron Star Merger

Author

Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P. A., Amato, A., Ananyeva, A., Anderson, S. B., Anderson, W. G., Angelova, S. V., Antier, S., Appert, S., Arai, K., Araya, M. C., Areeda, J. S., Arnaud, N., Arun, K. G., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Atallah, D. V., Aufmuth, P., Aulbert, C., AultONeal, K., Austin, C., Avila-Alvarez, A., Babak, S., Bacon, P., Bader, M. K. M., Bae, S., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Banagiri, S., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barkett, K., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Barthelmy, S. D., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bawaj, M., Bayley, J. C., Bazzan, M., Bécsy, B., Beer, C., Bejger, M., Belahcene, I., Bell, A. S., Berger, B. K., Bergmann, G., Bero, J. J., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Billman, C. R., Birch, J., Birney, R., Birnholtz, O., Biscans, S., Biscoveanu, S., Bisht, A., Bitossi, M., Biwer, C., Bizouard, M. A., Blackburn, J. K., Blackman, J., Blair, C. D., Blair, D. G., Blair, R. M., Bloemen, S., Bock, O., Bode, N., Boer, M., Bogaert, G., Bohe, A., Bondu, F., Bonilla, E., Bonnand, R., Boom, B. A., Bork, R., Boschi, V., Bose, S., Bossie, K., Bouffanais, Y., Bozzi, A., Bradaschia, C., Brady, P. R., Branchesi, M., Brau, J. E., Briant, T., Brillet, A., Brinkmann, Markus, Brisson, V., Brockill, P., Broida, J. E., Brooks, A. F., Brown, D. A., Brown, D. D., Brunett, S., Buchanan, C. C., Buikema, A., Bulik, T., Bulten, H. J., Buonanno, A., Buskulic, D., Buy, C., Byer, R. L., Cabero, M., Cadonati, L., Cagnoli, G., Cahillane, C., Bustillo, J. Calder, Callister, T. A., Calloni, E., Camp, J. B., Canepa, M., Canizares, P., Cannon, K. C., Cao, H., Cao, J., Capano, C. D., Capocasa, E., Carbognani, F., Caride, S., Carney, M. F., Diaz, J. Casanueva, Casentini, C., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Cella, G., Cepeda, C. B., Cerdá-Durán, P., Cerretani, G., Cesarini, E., Chamberlin, S. J., Chan, M., Chao, S., Charlton, P., Chase, E., Chassande-Mottin, E., Chatterjee, D., Chatziioannou, K., Cheeseboro, B. D., Chen, H. Y., Chen, Ximeng, Chen, Y., Cheng, H. P., Chia, H., Chincarini, A., Chiummo, A., Chmiel, T., Cho, H. S., Cho, M., Chow, J. H., Christensen, N., Chu, Q., Chua, A. J. K., Chua, S., Chung, A. K. W., Chung, S., Ciani, G., Ciolfi, R., Cirelli, C. E., Cirone, A., Clara, F., Clark, J. A., Clearwater, P., Cleva, F., Cocchieri, C., Coccia, E., Cohadon, P. F., Cohen, D., Colla, A., Collette, C. G., Cominsky, L. R., Jr., M. 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H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, Tim, Nitz, D., Nosek, D., Novotny, V., Nožka, L., Núñez, L. A., Oikonomou, F., Olinto, A., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Peña-Rodriguez, J., Pereira, L. A. S., Perlin, M., Perrone, L., Peters, Christine Jutta, Petrera, S., Phuntsok, J., Pierog, T., Pimenta, M., Pirronello, V., Platino, M., Plum, Matthias, Poh, J., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollan, Raúl, Rautenberg, J., Ravignani, D., Ridky, J., Riehn, F., Risse, M., Ristori, P., Rizi, V., Roncoroni, M. J., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saffi, S. J., Saftoiu, A., Salamida, F., Saleh, A., Salina, G., Sánchez, F., Sanchez-Lucas, P., Santos, E. 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A., Ventura, C., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, David Simon, Watson, A. A., Weber, M., Weindl, A., Wiedeński, M., Wiencke, L., Wilczyński, H., Wirtz, Marcus, Wittkowski, D., Wundheiler, B., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., Zuccarello, F., Kim, S., Schulze, S., Corral-Santana, J. M., González-López, J., Hartmann, D. H., Ishwara-Chandra, C. H., Martín, S., Mehner, A., Misra, K., Michałowski, M. J., Resmi, L., Paragi, Z., Agudo, I., An, T., Beswick, R., Casadio, C., Frey, S., Jonker, P., Kettenis, M., Marcote, B., Moldon, J., Szomoru, A., Langevelde, H. J., Cwiek, A., Cwiok, M., Czyrkowski, H., Dabrowski, R., Kasprowicz, G., Mankiewicz, L., Nawrocki, K., Opiela, R., Piotrowski, L. W., Wrochna, G., Zaremba, M., Żarnecki, A. F., Haggard, D., Nynka, M., Ruan, J. J., Bland, P. A., Booler, T., Devillepoix, H. A. R., De Gois, J. S., Hancock, P. J., Howie, R. M., Paxman, J., Sansom, E. K., Towner, M. C., Tonry, J., Coughlin, M., Stubbs, C. W., Denneau, L., Heinze, A., Stalder, B., Weiland, H., Eatough, R. P., Kramer, M., Kraus, A., Piro, L., González, J. Becerra, Butler, N. R., Khandrika, H. G., Kutyrev, A., Lee, W. H., Ricci, R., Sanchez-Ramirez, R., Veilleux, S., Watson, A. M., Wieringa, M. H., Burgess, J. M., Van Eerten, H., Fontes, C. J., Korobkin, O., Wollaeger, R. T., Camilo, F., Foley, A. R., Goedhart, S., Makhathini, S., Oozeer, N., Smirnov, O. M., and Woudt, P. A.

Abstract

59 Seiten : Illustrationen, Tabellen, Diagramme (2017).

Published
2017
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18. Gaia16aye binary microlensing event is rising for the 5th tim

Author

Wyrzykowski, L., Mroz, P., Rybicki, K., Altavilla, G., Bakis, V., Bendjoya, P., Birenbaum, G., Blagorodnova, N., Blanco-Cuaresma, S., Bonanos, A., Bozza, V., Britavskiy, N., Burgaz, U., Butterley, T., Capuozzo, P., Carrasco, J. M., Chruslinska, M., Damljanovic, G., Dapergolas, T., Dennefeld, M., Dhillon, V. S., Dominik, M., Esenoglu, H., Fossey, S., Gomboc, A., Hallokoun, N., Hamanowicz, A., Hardy, L. K., Hudec, R., Khamitov, I., Klencki, J., Kolaczkowski, Z., Kolb, U., Leonini, S., Leto, G., Lewis, F., Liakos, A., Littlefair, S. P., Maoz, D., Maund, J. R., Mikolajczyk, P., Palaversa, L., Pawlak, M., Penny, M., Piascik, A., Reig, P., Rhodes, L., Russell, D., Sanchez, R. Z., Shappee, B., Shvartzvald, Y., Sitek, M., Sniegowska, M., Sokolovsky, K., Steele, I., Street, R., Tomasella, L., Trascinelli, L., Wiersema, K., Wilson, R. W., Zharkov, I., Zoła, Stanisław, and Zubareva, A.

Subjects
Microlensing Event, Transient
Published
2017

19. AGNs with discordant optical and X-ray classification are not a physical family: diverse origin in two AGNs

Author

Carrera, F., Ordovás-Pascual, I., Mateos, S., Wiersema, K., Barcons, X., Braito, V., Caccianiga, A., Del Moro, A., Ceca, R., Severgnini, P., Della Ceca, R., National Science Foundation (US), Alfred P. Sloan Foundation, Agenzia Spaziale Italiana, European Commission, Ministerio de Economía y Competitividad (España), Fundações de Amparo à Pesquisa (Brasil), Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Department of Energy (US), National Aeronautics and Space Administration (US), Higher Education Funding Council for England, Max Planck Institute for Astrophysics, Japan Science and Technology Agency, and Universidad de Cantabria

Subjects
Seyfert [Galaxies], Galaxies: Seyfert, active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Library science, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Web site, Galaxies: nuclei, Physics, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Galaxies: active, Astrophysics - Astrophysics of Galaxies, galaxies [X-rays], X-rays: galaxies, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), nuclei [Galaxies], Christian ministry, Administration (government)
Abstract

Approximately 3-17 per cent of active galactic nuclei (AGNs) without detected rest-frame UV/optical broad emission lines (type-2 AGN) do not show absorption in X-rays. The physical origin behind the apparently discordant optical/X-ray properties is not fully understood. Our study aims at providing insight into this issue by conducting a detailed analysis of the nuclear dust extinction and X-ray absorption properties of two AGNs with low X-ray absorption and with high optical extinction, for which a rich set of high-quality spectroscopic data is available from XMM-Newton archive data in X-rays and XSHOOTER proprietary data at UV-to-NIR wavelengths. In order to unveil the apparent mismatch, we have determined the AV/NH and both the supermassive black hole and the host galaxy masses. We find that the mismatch is caused in one case by an abnormally high dust-to-gas ratio that makes the UV/optical emission to appear more obscured than in the X-rays. For the other object, we find that the dust-to-gas ratio is similar to the Galactic one but the AGN is hosted by a very massive galaxy so that the broad emission lines and the nuclear continuum are swamped by the star light and difficult to detect., IO-P and FJC acknowledge financial support through grant AYA2015-64346-C2-1-P (MINECO/FEDER). SM acknowledges financial support by the Spanish Ministry of Economy and Competitiveness through grant AYA2016-76730-P (MINECO/FEDER). AC, RD, PS and VB acknowledge financial support by the Italian Space Agency (contract ASI-INAF I/037/12/0). Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society and the Higher Education Funding Council for England. The SDSS web site is http://www.sdss.org/. The STARLIGHT project is supported by the Brazilian agencies CNPq, CAPES and FAPESP and by the France-Brazil CAPES/Cofecub program.

Published
2017

20. Multi-messenger Observations of a Binary Neutron Star Merger

Author

Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P. A., Amato, A., Ananyeva, A., Anderson, S. B., Anderson, W. G., Angelova, S. V., Antier, S., Appert, S., Arai, K., Araya, M. C., Areeda, J. S., Arnaud, N., Arun, K. G., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Atallah, D. V., Aufmuth, P., Aulbert, C., Aultoneal, K., Austin, C., Avila-Alvarez, A., Babak, S., Bacon, P., Bader, M. K. M., Bae, S., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Banagiri, S., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barkett, K., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Barthelmy, S. D., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bawaj, M., Bayley, J. C., Bazzan, M., Becsy, B., Beer, C., Bejger, M., Belahcene, I., Bell, A. S., Berger, B. K., Bergmann, G., Bero, J. J., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Billman, C. R., Birch, J., Birney, R., Birnholtz, O., Biscans, S., Biscoveanu, S., Bisht, A., Bitossi, M., Biwer, C., Urban, A. L., Usman, S. A., Vahlbruch, H., Vajente, G., Valdes, G., Bakel, N., Beuzekom, M., Den Brand, J. F. J., Den Broeck, C., Vander-Hyde, D. C., Bizouard, M. A., Schaaf, L., Heijningen, J. V., Veggel, A. A., Vardaro, M., Varma, V., Vass, S., Vasuth, M., Vecchio, A., Vedovato, G., Veitch, J., Blackburn, J. K., Veitch, P. J., Venkateswara, K., Venugopalan, G., Verkindt, D., Vetro, F., Vicere, A., Viets, A. D., Vinciguerra, S., Vine, D. J., Vinet, J. Y., Blackman, J., Vitale, S., Vo, T., Vocca, H., Vorvick, C., Vyatchanin, S. P., Wade, A. R., Wade, L. E., Wade, M., Walet, R., Walker, M., Blair, C. D., Wallace, L., Walsh, S., Wang, G., Wang, H., Wang, J. Z., Wang, W. H., Wang, Y. F., Ward, R. L., Warner, J., Was, M., Blair, D. G., Watchi, J., Weaver, B., Wei, L. -W, Weinert, M., Weinstein, A. J., Weiss, R., Wen, L., Wessel, E. K., Wessels, P., Westerweck, J., Blair, R. M., Westphal, T., Wette, K., Whelan, J. T., Whitcomb, S. E., Whiting, B. F., Whittle, C., Wilken, D., Williams, D., Williams, R. D., Williamson, A. R., Bloemen, S., Willis, J. L., Willke, B., Wimmer, M. H., Winkler, W., Wipf, C. C., Wittel, H., Woan, G., Woehler, J., Wofford, J., Wong, K. W. K., Bock, O., Worden, J., Wright, J. L., Wu, D. S., Wysocki, D. M., Xiao, S., Yamamoto, H., Yancey, C. C., Yang, L., Yap, M. J., Yazback, M., Bode, N., Yu, Hang, Yu, Haocun, Yvert, M., Zadrozny, A., Zanolin, M., Zelenova, T., Zendri, J. -P, Zevin, M., Zhang, L., Zhang, M., Boer, M., Zhang, T., Zhang, Y. -H, Zhao, C., Zhou, M., Zhou, Z., Zhu, S. J., Zhu, X. J., Zimmerman, A. B., Zucker, M. 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A., Ahlers, M., Ahrens, M., Al Samarai, I., Altmann, D., Andeen, K., Anderson, T., Ansseau, I., Anton, G., Argelles, C., Bork, R., Auffenberg, J., Axani, S., Bagherpour, H., Bai, X., Barron, J. P., Barwick, S. W., Baum, V., Bay, R., Beatty, J. J., Tjus, J. Becker, Boschi, V., Bernardini, E., Besson, D. Z., Binder, G., Bindig, D., Blaufuss, E., Blot, S., Bohm, C., Borner, M., Bos, F., Bose, D., Bose, S., Boser, S., Botner, O., Bourbeau, E., Bourbeau, J., Bradascio, F., Braun, J., Brayeur, L., Brenzke, M., Bretz, H. -P, Bron, S., Bossie, K., Brostean-Kaiser, J., Burgman, A., Carver, T., Casey, J., Casier, M., Cheung, E., Chirkin, D., Christov, A., Clark, K., Classen, L., Bouffanais, Y., Coenders, S., Collin, G. H., Conrad, J. M., Cowen, D. F., Cross, R., Day, M., Andre, J. P. A. M., Clercq, C., Delaunay, J. J., Dembinski, H., Bozzi, A., Ridder, S., Desiati, P., Vries, K. D., Wasseige, G., With, M., Deyoung, T., Diaz-Velez, J. C., Di Lorenzo, V., Dujmovic, H., Dumm, J. 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R., Kohnen, G., Koirala, R., Kolanoski, H., Brisson, V., Kopke, L., Kopper, C., Kopper, S., Koschinsky, J. P., Koskinen, D. J., Kowalski, M., Krings, K., Kroll, M., Krckl, G., Kunnen, J., Brockill, P., Kunwar, S., Kurahashi, N., Kuwabara, T., Kyriacou, A., Labare, M., Lanfranchi, J. L., Larson, M. J., Lauber, F., Lesiak-Bzdak, M., Leuermann, M., Broida, J. E., Liu, Q. R., Lu, L., Lnemann, J., Luszczak, W., Madsen, J., Maggi, G., Mahn, K. B. M., Mancina, S., Maruyama, R., Mase, K., Brooks, A. F., Maunu, R., Mcnally, F., Meagher, K., Medici, M., Meier, M., Menne, T., Merino, G., Meures, T., Miarecki, S., Micallef, J., Brown, D. A., Moment, G., Montaruli, T., Moore, R. W., Moulai, M., Nahnhauer, R., Nakarmi, P., Naumann, U., Neer, G., Niederhausen, H., Nowicki, S. C., Brown, D. D., Nygren, D. R., Pollmann, A. Obertacke, Olivas, A., O Murchadha, A., Palczewski, T., Pandya, H., Pankova, D. V., Peiffer, P., Pepper, J. A., Heros, C. Perez Los, Brunett, S., Pieloth, D., Pinat, E., Price, P. 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W., Tse, M., Tso, R., Tsukada, L., Tsuna, D., Tuyenbayev, D., Ueno, K., Ugolini, D., and Unnikrishnan, C. S.

Abstract

The astrophysical journal / 2 848(2), L12 (2017). doi:10.3847/2041-8213/aa91c9, On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of $\sim$1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg$^2$ at a luminosity distance of $40^{+8}_{-8}$ Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Msun. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at $\sim$40 Mpc) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over $\sim$10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position $\sim$9 and $\sim$16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. (Abridged), Published by IOP Publ., London

Published
2017
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21. GRB 130925A: an ultralong gamma ray burst with a dust-echo afterglow, and implications for the origin of the ultralong GRBs

Author

Evans, P. A., Willingale, R., Osborne, J. P., O’Brien, P. T., Tanvir, N. R., Frederiks, D. D., Pal’shin, V. D., Svinkin, D. S., Lien, A., Cummings, J., Xiong, S., Zhang, B.-B., Gotz, D., Savchenko, V., Suzuki, K., Wiersema, K., Starling, R. L. C., Castro-Tirado, A. J., Beardmore, A. P., Sanchez-Ramirez, R., Gorosabel, J., Jeong, S., Kennea, J. A., Burrows, D. N., Gehrels, N., Negoro, Hitoshi, Nakahira, Satoshi, Department of Physics and Astronomy [Leicester], University of Leicester, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), NASA Goddard Space Flight Center (GSFC), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Gran Telescopio Canarias, Astrophysics::High Energy Astrophysical Phenomena, gamma-ray burst: general, gamma-ray burst, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, High Energy Astrophysical Phenomena (astro-ph.HE), [PHYS]Physics [physics], Physics, X-ray astronomy, 010308 nuclear & particles physics, Echo (computing), Astronomy, Astronomy and Astrophysics, Gamma-ray astronomy, Afterglow, Spectral emission, Space and Planetary Science, Christian ministry, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Gamma-ray burst
Abstract

著者人数: 27名, Accepted: 2014-07-21, 資料番号: SA1140164000

Published
2014

22. The Afterglow and Early-type Host Galaxy of the Short GRB 150101B at z = 0.1343

Author

Fong, W., Margutti, R., Chornock, R., Berger, E., Shappee, B. J., Levan, A. J., Tanvir, N. R., Smith, N., Milne, P. A., Laskar, T., Fox, D. B., Lunnan, R., Blanchard, P. K., Hjorth, J., Wiersema, K., van der Horst, A. J., and Zaritsky, D.

Abstract

We present the discovery of the X-ray and optical afterglows of the short-duration GRB 150101B, pinpointing the event to an early-type host galaxy at z = 0.1343 ± 0.0030. This makes GRB 150101B the most nearby short gamma-ray burst (GRB) with an early-type host galaxy discovered to date. Fitting the spectral energy distribution of the host galaxy results in an inferred stellar mass of ≈7 x 10^(10) M⊙, stellar population age of ≈2–2.5 Gyr, and star formation rate of ≾0.4 M⊙ yr^(-1). The host of GRB 150101B is one of the largest and most luminous short GRB host galaxies, with a B-band luminosity of ≈4.3L* and half-light radius of ≈8 kpc. GRB 150101B is located at a projected distance of 7.35 ± 0.07 kpc from its host center and lies on a faint region of its host rest-frame optical light. Its location, combined with the lack of associated supernova, is consistent with an NS–NS/NS–BH merger progenitor. From modeling the evolution of the broadband afterglow, we calculate isotropic-equivalent gamma-ray and kinetic energies of ≈1.3 x 10^(49) erg and ≈(6-14) x 10^(51) erg, respectively, a circumburst density of ≈(0.8-4) x 10^(-5) cm^(-3), and a jet opening angle of ≳9°. Using observations extending to ≈30 days, we place upper limits of ≾(2-4) x 10^(41) erg s^(-1) on associated kilonova emission. We compare searches following previous short GRBs to existing kilonova models and demonstrate the difficulty of performing effective kilonova searches from cosmological short GRBs using current ground-based facilities. We show that at the Advanced LIGO/VIRGO horizon distance of 200 Mpc, searches reaching depths of ≈23–24 AB mag are necessary to probe a meaningful range of kilonova models.

Published
2016

23. Multi-messenger Observations of a Binary Neutron Star Merger

Author

Abbott, B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P. A., Amato, A., Ananyeva, A., Anderson, S. B., Anderson, W. G., Angelova, S. V., Antier, S., Appert, S., Arai, K., Araya, M. C., Areeda, J. S., Arnaud, N., Arun, K. G., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Atallah, D. V., Aufmuth, P., Aulbert, C., AultONeal, K., Austin, C., Avila-Alvarez, A., Babak, S., Bacon, P., Bader, M. K. M., Bae, S., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Banagiri, S., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barkett, K., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Barthelmy, S. D., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Bawaj, M., Bayley, J. C., Bazzan, M., Bécsy, B., Beer, C., Bejger, M., Belahcene, I., Bell, A. S., Berger, B. K., Bergmann, G., Bero, J. J., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Billman, C. R., Birch, J., Birney, R., Birnholtz, O., Biscans, S., Biscoveanu, S., Bisht, A., Bitossi, M., Biwer, C., Bizouard, M. A., Blackburn, J. K., Blackman, J., Blair, C. D., Blair, D. G., Blair, R. M., Bloemen, S., Bock, O., Bode, N., Boer, M., Bogaert, G., Bohe, A., Bondu, F., Bonilla, E., Bonnand, R., Boom, B. A., Bork, R., Boschi, V., Bose, S., Bossie, K., Bouffanais, Y., Bozzi, A., Bradaschia, C., Brady, P. R., Branchesi, M., Brau, J. E., Briant, T., Brillet, A., Brinkmann, M., Brisson, V., Brockill, P., Broida, J. E., Brooks, A. F., Brown, D. A., Brown, D. D., Brunett, S., Buchanan, C. C., Buikema, A., Bulik, T., Bulten, H. J., Buonanno, A., Buskulic, D., Buy, C., Byer, R. L., Cabero, M., Cadonati, L., Cagnoli, G., Cahillane, C., Bustillo, J. Calderón, Callister, T. A., Calloni, E., Camp, J. B., Canepa, M., Canizares, P., Cannon, K. C., Cao, H., Cao, J., Capano, C. D., Capocasa, E., Carbognani, F., Caride, S., Carney, M. F., Diaz, J. Casanueva, Casentini, C., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Cella, G., Cepeda, C. B., Cerdá-Durán, P., Cerretani, G., Cesarini, E., Chamberlin, S. J., Chan, M., Chao, S., Charlton, P., Chase, E., Chassande-Mottin, E., Chatterjee, D., Chatziioannou, K., Cheeseboro, B. D., Chen, H. Y., Chen, X., Chen, Y., Cheng, H.-P., Chia, H., Chincarini, A., Chiummo, A., Chmiel, T., Cho, H. S., Cho, M., Chow, J. H., Christensen, N., Chu, Q., Chua, A. J. K., Chua, S., Chung, A. K. W., Chung, S., Ciani, G., Ciolfi, R., Cirelli, C. E., Cirone, A., Clara, F., Clark, J. A., Clearwater, P., Cleva, F., Cocchieri, C., Coccia, E., Cohadon, P.-F., Cohen, D., Colla, A., Collette, C. G., Cominsky, L. R., Jr., M. Constancio, Conti, L., Cooper, S. J., Corban, P., Corbitt, T. R., Cordero-Carrión, I., Corley, K. R., Cornish, N., Corsi, A., Cortese, S., Costa, C. A., Coughlin, M. W., Coughlin, S. B., Coulon, J.-P., Countryman, S. T., Couvares, P., Covas, P. B., Cowan, E. E., Coward, D. M., Cowart, M. J., Coyne, D. C., Coyne, R., Creighton, J. D. E., Creighton, T. D., Cripe, J., Crowder, S. G., Cullen, T. J., Cumming, A., Cunningham, L., Cuoco, E., Canton, T. Dal, Dálya, G., Danilishin, S. L., D’Antonio, S., Danzmann, K., Dasgupta, A., Da Silva Costa, C. F., Dattilo, V., Dave, I., Davier, M., Davis, D., Daw, E. J., Day, B., De, S., DeBra, D., Degallaix, J., Laurentis, M. De, Deléglise, S., Pozzo, W. Del, Demos, N., Denker, T., Dent, T., Pietri, R. De, Dergachev, V., Rosa, R. De, DeRosa, R. T., Rossi, C. De, DeSalvo, R., Varona, O. de, Devenson, J., Dhurandhar, S., Díaz, M. C., Fiore, L. Di, Giovanni, M. Di, Girolamo, T. Di, Lieto, A. Di, Pace, S. Di, Palma, I. Di, Renzo, F. Di, Doctor, Z., Dolique, V., Donovan, F., Dooley, K. L., Doravari, S., Dorrington, I., Douglas, R., Álvarez, M. Dovale, Downes, T. P., Drago, M., Dreissigacker, C., Driggers, J. C., Du, Z., Ducrot, M., Dupej, P., Dwyer, S. E., Edo, T. B., Edwards, M. C., Effler, A., Ehrens, P., Eichholz, J., Eikenberry, S. S., Eisenstein, R. A., Essick, R. C., Estevez, D., Etienne, Z. B., Etzel, T., Evans, M., Evans, T. M., Factourovich, M., Fafone, V., Fair, H., Fairhurst, S., Fan, X., Farinon, S., Farr, B., Farr, W. M., Fauchon-Jones, E. J., Favata, M., Fays, M., Fee, C., Fehrmann, H., Feicht, J., Fejer, M. M., Fernandez-Galiana, A., Ferrante, I., Ferreira, E. C., Ferrini, F., Fidecaro, F., Finstad, D., Fiori, I., Fiorucci, D., Fishbach, M., Fisher, R. P., Fitz-Axen, M., Flaminio, R., Fletcher, M., Fong, H., Font, J. A., Forsyth, P. W. F., Forsyth, S. S., Fournier, J.-D., Frasca, S., Frasconi, F., Frei, Z., Freise, A., Frey, R., Frey, V., Fries, E. M., Fritschel, P., Frolov, V. 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W., Moderski, R., Mohamed, M., Mohrmann, L., Morå, K., Moulin, E., Murach, T., Nakashima, S., Naurois, M. de, Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., Odaka, H., Ohm, S., Ostrowski, M., Oya, I., Padovani, M., Panter, M., Parsons, R. D., Pekeur, N. W., Pelletier, G., Perennes, C., Petrucci, P.-O., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Poon, H., Prokhorov, D., Prokoph, H., Pühlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Rauth, R., Renaud, M., de los Reyes, R., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Rulten, C. B., Sahakian, V., Saito, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Schlickeiser, R., Schüssler, F., Schulz, A., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Settimo, M., Seyffert, A. S., Shafi, N., Shilon, I., Shiningayamwe, K., Simoni, R., Sol, H., Spanier, F., Spir-Jacob, M., Stawarz, Ł., Steenkamp, R., Stegmann, C., Steppa, C., Sushch, I., Takahashi, T., Tavernet, J.-P., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Trichard, C., Tsirou, M., Tsuji, N., Tuffs, R., Uchiyama, Y., van der Walt, D. J., Eldik, C. van, Rensburg, C. van, Soelen, B. van, Vasileiadis, G., Veh, J., Venter, C., Viana, A., Vincent, P., Vink, J., Voisin, F., Völk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Wagner, P., Wagner, R. M., White, R., Wierzcholska, A., Willmann, P., Wörnlein, A., Wouters, D., Yang, R., Zaborov, D., Zacharias, M., Zanin, R., Zdziarski, A. A., Zech, A., Zefi, F., Ziegler, A., Zorn, J., Żywucka, N., Fender, R. P., Broderick, J. W., Stewart, A. J., ter Veen, S., Shulevski, A., Kavic, M., Simonetti, J. H., League, C., Tsai, J., Obenberger, K. S., Nathaniel, K., Taylor, G. B., Dowell, J. D., Liebling, S. L., Estes, J. A., Lippert, M., Sharma, I., Farella, B., Abeysekara, A. U., Alfaro, R., Alvarez, C., Arceo, R., Arteaga-Velázquez, J. C., Avila Rojas, D., Ayala Solares, H. A., Barber, A. S., Becerra Gonzalez, J., Becerril, A., Belmont-Moreno, E., BenZvi, S. Y., Berley, D., Bernal, A., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Cotti, U., Cotzomi, J., Coutiño de León, S., De León, C., De la Fuente, E., Diaz Hernandez, R., Dichiara, S., Dingus, B. L., DuVernois, M. A., Ellsworth, R. W., Engel, K., Enríquez-Rivera, O., Fiorino, D. W., Fleischhack, H., Fraija, N., García-González, J. A., Garfias, F., Gerhardt, M., Gonzõlez Muñoz, A., González, M. M., Goodman, J. A., Hampel-Arias, Z., Harding, J. P., Hernandez, S., Hernandez-Almada, A., Hona, B., Hüntemeyer, P., Iriarte, A., Jardin-Blicq, A., Joshi, V., Kaufmann, S., Kieda, D., Lara, A., Lauer, R. J., Lennarz, D., León Vargas, H., Linnemann, J. T., Longinotti, A. L., Luis Raya, G., Luna-García, R., López-Coto, R., Malone, K., Marinelli, S. S., Martinez, O., Martinez-Castellanos, I., Martínez-Castro, J., Martínez-Huerta, H., Matthews, J. A., Miranda-Romagnoli, P., Moreno, E., Mostafá, M., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Pelayo, R., Pretz, J., Pérez-Pérez, E. G., Ren, Z., Rho, C. D., Rivière, C., Rosa-González, D., Rosenberg, M., Ruiz-Velasco, E., Salazar, H., Salesa Greus, F., Sandoval, A., Schneider, M., Schoorlemmer, H., Sinnis, G., Smith, A. J., Springer, R. W., Surajbali, P., Tibolla, O., Tollefson, K., Torres, I., Ukwatta, T. N., Weisgarber, T., Westerhoff, S., Wisher, I. G., Wood, J., Yapici, T., Yodh, G. B., Younk, P. W., Zhou, H., Álvarez, J. D., Aab, A., Abreu, P., Aglietta, M., Albuquerque, I. F. M., Albury, J. M., Allekotte, I., Almela, A., Alvarez Castillo, J., Alvarez-Muñiz, J., Anastasi, G. A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Arsene, N., Asorey, H., Assis, P., Avila, G., Badescu, A. M., Balaceanu, A., Barbato, F., Barreira Luz, R. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Bertou, X., Biermann, P. L., Biteau, J., Blaess, S. G., Blanco, A., Blazek, J., Bleve, C., Boháčová, M., Bonifazi, C., Borodai, N., Botti, A. M., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caccianiga, L., Cancio, A., Canfora, F., Caruso, R., Castellina, A., Catalani, F., Cataldi, G., Cazon, L., Chavez, A. G., Chinellato, J. A., Chudoba, J., Clay, R. W., Cobos Cerutti, A. C., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Consolati, G., Contreras, F., Cooper, M. J., Coutu, S., Covault, C. E., Cronin, J., D'Amico, S., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., Day, J. A., Almeida, R. M. de, Jong, S. J. de, Mauro, G. De, de Mello Neto, J. R. T., Mitri, I. De, Oliveira, J. de, Souza, V. de, Debatin, J., Deligny, O., Díaz Castro, M. L., Diogo, F., Dobrigkeit, C., D'Olivo, J. C., Dorosti, Q., Dos Anjos, R. C., Dova, M. T., Dundovic, A., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Farmer, J., Farrar, G., Fauth, A. C., Fazzini, N., Feldbusch, F., Fenu, F., Fick, B., Figueira, J. M., Filipčič, A., Freire, M. M., Fujii, T., Fuster, A., Gaïor, R., García, B., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Golup, G., Gómez Berisso, M., Gómez Vitale, P. F., González, N., Gorgi, A., Gottowik, M., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Halliday, R., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Harvey, V. M., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hojvat, C., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Hulsman, J., Insolia, A., Isar, P. G., Jandt, I., Johnsen, J. A., Josebachuili, M., Jurysek, J., Kääpä, A., Kampert, K. H., Keilhauer, B., Kemmerich, N., Kemp, J., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Kukec Mezek, G., Kunka, N., Kuotb Awad, A., Lago, B. L., LaHurd, D., Lang, R. G., Lauscher, M., Legumina, R., Leigui de Oliveira, M. A., Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lo Presti, D., Lopes, L., López, R., López Casado, A., Lorek, R., Luce, Q., Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Maris, I. C., Marsella, G., Martello, D., Martinez, H., Martínez Bravo, O., Masías Meza, J. J., Mathes, H. J., Mathys, S., Matthews, J., Matthiae, G., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melo, D., Menshikov, A., Merenda, K.-D., Michal, S., Micheletti, M. I., Middendorf, L., Miramonti, L., Mitrica, B., Mockler, D., Mollerach, S., Montanet, F., Morello, C., Morlino, G., Müller, A. L., Müller, G., Muller, M. A., Müller, S., Mussa, R., Naranjo, I., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Núñez, L. A., Oikonomou, F., Olinto, A., Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pedreira, F., Pȩkala, J., Peña-Rodriguez, J., Pereira, L. A. S., Perlin, M., Perrone, L., Peters, C., Petrera, S., Phuntsok, J., Pierog, T., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Poh, J., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Ramos-Pollan, R., Rautenberg, J., Ravignani, D., Ridky, J., Riehn, F., Risse, M., Ristori, P., Rizi, V., Rodrigues de Carvalho, W., Rodriguez Fernandez, G., Rodriguez Rojo, J., Roncoroni, M. J., Roth, M., Roulet, E., Rovero, A. C., Ruehl, P., Saffi, S. J., Saftoiu, A., Salamida, F., Saleh, A., Salina, G., Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarmento, R., Sarmiento-Cano, C., Sato, R., Schauer, M., Scherini, V., Schieler, H., Schimp, M., Schmidt, D., Scholten, O., Schovánek, P., Schröder, F. G., Schröder, S., Schumacher, J., Sciutto, S. J., Segreto, A., Shadkam, A., Shellard, R. C., Sigl, G., Silli, G., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Soriano, J. F., Squartini, R., Stanca, D., Stanič, S., Stasielak, J., Stassi, P., Stolpovskiy, M., Strafella, F., Streich, A., Suarez, F., Suarez-Durán, M., Sudholz, T., Suomijärvi, T., Supanitsky, A. D., Šupík, J., Swain, J., Szadkowski, Z., Taboada, A., Taborda, O. A., Timmermans, C., Todero Peixoto, C. J., Tomankova, L., Tomé, B., Torralba Elipe, G., Travnicek, P., Trini, M., Tueros, M., Ulrich, R., Unger, M., Urban, M., Valdés Galicia, J. F., Valiño, I., Valore, L., Aar, G. van, Bodegom, P. van, van den Berg, A. M., Vliet, A. van, Varela, E., Cárdenas, B. Vargas, Vázquez, R. A., Veberič, D., Ventura, C., Vergara Quispe, I. D., Verzi, V., Vicha, J., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weindl, A., Wiedeński, M., Wiencke, L., Wilczyński, H., Wirtz, M., Wittkowski, D., Wundheiler, B., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., Zuccarello, F., Kim, S., Schulze, S., Corral-Santana, J. M., de Gregorio-Monsalvo, I., González-López, J., Hartmann, D. H., Ishwara-Chandra, C. H., Martín, S., Mehner, A., Misra, K., Michałowski, M. J., Resmi, L., Paragi, Z., Agudo, I., An, T., Beswick, R., Casadio, C., Frey, S., Jonker, P., Kettenis, M., Marcote, B., Moldon, J., Szomoru, A., van Langevelde, H. J., Cwiek, A., Cwiok, M., Czyrkowski, H., Dabrowski, R., Kasprowicz, G., Mankiewicz, L., Nawrocki, K., Opiela, R., Piotrowski, L. W., Wrochna, G., Zaremba, M., Żarnecki, A. F., Haggard, D., Nynka, M., Ruan, J. J., Bland, P. A., Booler, T., Devillepoix, H. A. R., Gois, J. S. de, Hancock, P. J., Howie, R. M., Paxman, J., Sansom, E. K., Towner, M. C., Tonry, J., Coughlin, M., Stubbs, C. W., Denneau, L., Heinze, A., Stalder, B., Weiland, H., Eatough, R. P., Kramer, M., Kraus, A., Piro, L., González, J. Becerra, Butler, N. R., Khandrika, H. G., Kutyrev, A., Lee, W. H., Ricci, R., Ryan Jr., R. E., Sánchez-Ramírez, R., Veilleux, S., Watson, A. M., Wieringa, M. H., Burgess, J. M., Eerten, H. van, Fontes, C. J., Korobkin, O., Wollaeger, R. T., Camilo, F., Foley, A. R., Goedhart, S., Makhathini, S., Oozeer, N., Smirnov, O. M., and Woudt, P. A.

Subjects
ddc
Published
2016

24. A gamma-ray burst at a redshift of z approximately 8.2

Author

Tanvir, N, Fox, D, Levan, A, Berger, E, Wiersema, K, Fynbo, J, Cucchiara, A, Krühler, T, Gehrels, N, Bloom, J, Greiner, J, Evans, P, Rol, E, Olivares, F, Hjorth, J, Jakobsson, P, Farihi, J, Willingale, R, Starling, R, Cenko, S, Perley, D, Maund, JR, Duke, J, Wijers, R, and Adamson, A

Abstract

Long-duration gamma-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using current technology. Hitherto, the highest redshift measured for any object was z = 6.96, for a Lyman-alpha emitting galaxy. Here we report that GRB 090423 lies at a redshift of z approximately 8.2, implying that massive stars were being produced and dying as GRBs approximately 630 Myr after the Big Bang. The burst also pinpoints the location of its host galaxy.

Published
2016

25. GRB110715A: VLT redshift

Author

Piranomonte, S., Vergani, S.D., Malesani, D., Fynbo, J.P.U., Wiersema, K., Kaper, L., High Energy Astrophys. & Astropart. Phys (API, FNWI), and Low Energy Astrophysics (API, FNWI)

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We observed the optical afterglow of GRB 110715A (Sonbas et al., GCN Circ. 12158) with the ESO VLT equipped with the X-shooter spectrograph.

Published
2016

26. Supplement: 'Localization and Broadband Follow-up of the Gravitational-wave Transient GW150914' (2016, ApJS, 225, 8)

Author

Abbott, B. P., Abbott, R., Abbott, T. D., Abernathy, M. R., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Bodiya, T. P., Goetz, R., Mihara, T., Gondan, L., González, G., Castro, J. M. G., Gopakumar, A., Gordon, N. A., Gorodetsky, M. L., Miao, H., Gossan, S. E., Walsh, S., Johnson, M. D., Aston, S. M., Tomida, H., Gosselin, M., Gouaty, R., Graef, C., Graff, P. B., Granata, M., Grant, A., Gras, S., Wang, G., Michel, C., Gray, C., Greco, G., Ueno, S., Johnson, M. W. G., Green, A. C., Astone, P., Groot, P., Grote, H., Grunewald, S., Vikram, V., Guidi, G. M., Guo, X., Nichol, R. C., Gupta, A., Tsunemi, H., Gupta, M. K., Gushwa, K. E., Karliner, I., Gustafson, E. K., Gustafson, R., Wang, H., Aufmuth, P., Hacker, J. J., Hall, B. R., Hall, E. D., Middleton, H., Cavalier, F., Hammond, G., Haney, M., Hanke, M. M., Hanks, J., Wang, M., Braginsky, V. B., Hanna, C., Hannam, M. D., Hanson, J., Aulbert, C., Hardwick, T., Cowperthwaite, P. S., Mikhailov, E. E., Haris, K., Harms, J., Wang, X., Harry, G. M., Harry, I. W., Hart, M. J., Kasen, D., Hartman, M. T., Haster, C. -J., Haughian, K., Matsuoka, M., Heidmann, A., Milano, L., Wang, Y., Babak, S., Heintze, M. C., Heitmann, H., Hello, P., Hemming, G., Hendry, M., Kent, S., Heng, I. S., MAXI Collaboration, Hennig, J., Ward, R. L., Heptonstall, A. W., Miller, J., Heurs, M., Hild, S., Bacon, P., Hoak, D., Hodge, K. A., Hofman, D., Hollitt, S. E., Mason, K., Warner, J., Kessler, R., Holt, K., Holz, D. E., Millhouse, M., Hopkins, P., Hosken, D. J., Hough, J., Houston, E. A., Bader, M. K. M., Howell, E. J., Smith, M., Fraser, M., Croft, S., Hu, Y. M., Huang, S., Kim, A. G., Huerta, E. A., Królak, A., Batch, J. C., Huet, D., Hughey, B., Husa, S., Martini, P., Huttner, S. H., Feng, L., Huynh-Dinh, T., Idrisy, A., Baker, P. T., Indik, N., Ingram, D. R., Carrasco Kind, M., Minenkov, Y., Inta, R., Was, M., Isa, H. N., Isac, J. -M., Franzen, T. M. O., Isi, M., Islas, G., Isogai, T., Iyer, B. R., Izumi, K., Baldaccini, F., Jacqmin, T., Weaver, B., Ming, J., Kuehn, K., Jang, H., Gaensler, B. M., Jani, K., Jaranowski, P., Jawahar, S., Jiménez-Forteza, F., Johnson, W. W., Jones, D. I., Boer, M., Jones, R., Jonker, R. J. G., Mirshekari, S., Ballardin, G., Johnston-Hollitt, M., Kuropatkin, N., Ju, L., Kalaghatgi, C. V., Kalogera, V., Kandhasamy, S., Wei, L. -W., Kang, G., Kanner, J. B., Karki, S., Kasprzack, M., Mishra, C., Kaplan, D. L., Katsavounidis, E., Katzman, W., Lahav, O., Ballmer, S. W., Walker, A. R., Kaufer, S., Kaur, T., Kawabe, K., Kawazoe, F., Kéfélian, F., Kehl, M. S., Morales, M. F., Nord, B., Keitel, D., Kelley, D. B., Weinert, M., Kells, W., Li, T. S., Kennedy, R., Barayoga, J. C., Key, J. S., Khalaidovski, A., Khalili, F. Y., Tingay, S. J., Khan, I., Mitra, S., Weinstein, A. J., Khan, S., Khan, Z., Khazanov, E. A., Kijbunchoo, N., Lima, M., Kim, C., Kim, J., Barclay, S. E., Crocce, M., Kim, K., Weiss, R., Kim, N., Mitrofanov, V. P., Kim, Y. -M., King, E. J., King, P. J., Kinzel, D. L., Kissel, J. S., Branchesi, M., Kleybolte, L., Cavalieri, R., Blackburn, J. K., Welborn, T., Klimenko, S., Koehlenbeck, S. M., Barish, B. C., Mitselmakher, G., Kokeyama, K., Koley, S., Kondrashov, V., Kontos, A., Korobko, M., Korth, W. Z., Martin, R. M., Masserot, A., Mittleman, R., Barker, D., Moggi, A., Mohan, M., Baune, C., Mohapatra, S. R. P., Montani, M., Moore, B. C., Nugent, P., Matone, L., Moore, C. J., Wayth, R. B., Moraru, D., Moreno, G., Krueger, C., Morriss, S. R., Mossavi, K., Mours, B., Mow-Lowry, C. M., Bavigadda, V., Wen, L., Mueller, C. L., Mueller, G., Williams, A., Ogando, R., Muir, A. W., Mukherjee, A., Kuehn, G., Mukherjee, D., Mukherjee, S., Mukund, N., Lord, J. E., Mullavey, A., Munch, J., Murphy, D. J., Murchison Wide-field Array (MWA Collaboration), Bazzan, M., Murray, P. G., Petravick, D., Mytidis, A., Kumar, P., Nardecchia, I., Wessels, P., Naticchioni, L., Nayak, R. K., Necula, V., Nedkova, K., Smartt, S. J., Nelemans, G., Neri, M., Neunzert, A., Behnke, B., Plazas, A. A., Westphal, T., Kuo, L., Newton, G., Nguyen, T. T., Nielsen, A. B., Nissanke, S., Chambers, K. C., Nitz, A., Nocera, F., Nolting, D., Normandin, M. E. N., Wette, K., Nuttall, L. K., Oberling, J., Kutynia, A., Quataert, E., Bejger, M., Ochsner, E., Smith, K. W., O'Dell, J., Oelker, E., Ogin, G. H., Whelan, J. T., Oh, J. J., Oh, S. H., Ohme, F., Oliver, M., Maia, M. A. G., Oppermann, P., Roe, N., Huber, M. E., Oram, R. J., Bell, A. S., Bogaert, G., O'Reilly, B., O'Shaughnessy, R., Ottaway, D. J., Ottens, R. S., Overmier, H., Owen, B. J., Lackey, B. D., Pai, A., Young, D. R., Pai, S. A., Thorne, K. S., Allen, W. H., Fernández-Muñoz, R., Romer, A. K., Palamos, J. R., Palashov, O., Bell, C. J., Palliyaguru, N., Palomba, C., Pal-Singh, A., Landry, M., Wright, D. E., Wechsler, R. 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A., Cleva, F., Viceré, A., Coccia, E., Buckley, D., Flaugher, B., Cohadon, P. -F., Colla, A., Collette, C. G., Cominsky, L., Constancio, M., Jr., McWilliams, S. T., Ajith, P., Vinciguerra, S., Conte, A., Conti, L., Castander, F. J., Cook, D., Corbitt, T. R., Foley, R. J., Cornish, N., Corsi, A., Cortese, S., Costa, C. A., Vine, D. J., Meacher, D., Coughlin, M. W., Coughlin, S. B., Rebolo, R., Allen, B., Coulon, J. -P., Countryman, S. T., Couvares, P., Fong, W. -F., Cowan, E. E., Vinet, J. -Y., Coward, D. M., Cowart, M. J., Bassiri, R., Coyne, D. C., Serra-Ricart, M., Coyne, R., Craig, K., Creighton, J. D. E., Allocca, A., Cripe, J., Vitale, S., Crowder, S. G., Fosalba, P., Cumming, A., Cunningham, L., Meadors, G. D., Israelian, G., Cuoco, E., Dal Canton, T., Danilishin, S. L., D'Antonio, S., Vo, T., Danzmann, K., Darman, N. S., Altin, P. A., Dattilo, V., Fox, D. B., Dave, I., Budnev, N. M., Meidam, J., Daveloza, H. P., Davier, M., Bock, O., Davies, G. S., Daw, E. J., Day, R., DeBra, D., Debreczeni, G., Degallaix, J., Anderson, S. B., Martynov, D. V., Frieman, J., Melatos, A., Vocca, H., De Laurentis, M., Deléglise, S., Del Pozzo, W., Denker, T., Dent, T., Dereli, H., Dergachev, V., DeRosa, R. T., Gress, O., De Rosa, R., Logue, J., DeSalvo, R., Kozak, D. B., Mendell, G., Fryer, C. L., Anderson, W. G., Dhurandhar, S., Díaz, M. C., Di Fiore, L., Di Giovanni, M., Ivanov, K., Vorvick, C., Di Lieto, A., Di Pace, S., Di Palma, I., Di Virgilio, A., Mendoza-Gandara, D., Dojcinoski, G., Gaztanaga, E., Dolique, V., Arai, K., Donovan, F., DELLA VALLE, Massimo, Poleshuk, V., Dooley, K. L., Doravari, S., Douglas, R., Downes, T. P., Drago, M., Mercer, R. A., Drever, R. W. P., Driggers, J. C., Gerdes, D. W., Voss, D., Du, Z., Tlatov, A., Ducrot, M., Araya, M. C., Dwyer, S. E., Edo, T. B., Edwards, M. C., Effler, A., Neilsen, E., Eggenstein, H. -B., Tucker, D. L., Ehrens, P., Eichholz, J., Cavagliá, M., Brady, P. R., Eikenberry, S. S., Engels, W., Essick, R. C., Arceneaux, C. C., Etzel, T., Evans, M., Vousden, W. D., Merilh, E., Evans, T. M., Everett, R., Yurkov, V., Factourovich, M., Fafone, V., Goldstein, D. A., Fair, H., Fairhurst, S., Fan, X., Vyatchanin, S. P., Fang, Q., Areeda, J. S., Merzougui, M., Farinon, S., Chornock, R., Farr, B., Farr, W. M., Favata, M., Fays, M., Gruen, D., Wade, A. R., Fehrmann, H., Fejer, M. M., Ferrante, I., Ferreira, E. C., Meshkov, S., MASTER Collaboration, Ferrini, F., Arnaud, N., Fidecaro, F., Fiori, I., Wade, L. E., Fiorucci, D., Fisher, R. P., Gruendl, R. A., Flaminio, R., Fletcher, M., Fournier, J. -D., Kawai, N., Messenger, C., Franco, S., Frasca, S., Wade, M., Frasconi, F., Arun, K. G., Frei, Z., Freise, A., Frey, R., Gutierrez, G., Frey, V., Serino, M., Fricke, T. T., Basti, A., Walker, M., Fritschel, P., Frolov, V. V., Fulda, P., Fyffe, M., Gabbard, H. A. G., Ascenzi, S., Gair, J. R., Gammaitoni, L., Marx, J. N., Herner, K., Wallace, L., Gaonkar, S. G., Messick, C., Garufi, F., Gatto, A., Gaur, G., Gehrels, N., Gemme, G., Gendre, B., Genin, E., Negoro, H., Lombardi, A. L., Ashton, G., Gennai, A., Honscheid, K., Kringel, V., Meyers, P. M., George, J., Gergely, L., Germain, V., Ghosh, A., Ghosh, S., ELIAS DE LA ROSA, NANCY DEL CARMEN, Nakahira, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gill, K., Ast, M., Mezzani, F., James, D. J., Glaefke, A., and Goetz, E.

Abstract

This Supplement provides supporting material for Abbott et al. (2016a). We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the current EM follow-up program. We compare the four probability sky maps produced for the gravitational-wave transient GW150914, and provide additional details of the EM follow-up observations that were performed in the different bands.

Published
2016

27. XIPE

Author

Soffitta, P., Bellazzini, R., Bozzo, E., Burwitz, V., Castro-Tirado, A. J., Costa, E., Courvoisier, T., Feng, H., Gburek, S., Goosmann, R., Karas, V., Matt, G., Muleri, F., Nandra, K., Pearce, M., Poutanen, J., Reglero, V., Sabau Maria, D., Santangelo, A., Tagliaferri, G., Tenzer, C., Vink, J., Weisskopf, M. C., Zane, S., Agudo, I., Antonelli, A., Attina, P., Baldini, L., Bykov, A., Carpentiero, R., Cavazzuti, E., Churazov, E., Del Monte, E., De Martino, D., Donnarumma, I., Doroshenko, V., Evangelista, Y., Ferreira, I., Gallo, E., Grosso, N., Kaaret, P., Kuulkers, E., Laranaga, J., Latronico, L., Lumb, D. H., Macian, J., Malzac, J., Marin, F., Massaro, E., Minuti, M., Mundell, C., Ness, J. U., Oosterbroek, T., Paltani, S., Pareschi, G., Perna, R., Petrucci, P. O., Pinazo, H. B., Pinchera, M., Rodriguez, J. P., Roncadelli, M., Santovincenzo, A., Sazonov, S., Sgro, C., Spiga, D., Svoboda, J., Theobald, C., Theodorou, T., Turolla, R., Wilhelmi De Ona, E., Winter, B., Akbar, A. M., Allan, H., Aloisio, R., Altamirano, D., Amati, L., Amato, E., Angelakis, E., Arezu, J., Atteia, J. L., Axelsson, M., Bachetti, M., Ballo, L., Balman, S., Bandiera, R., Barcons, X., Basso, S., Baykal, A., Becker, W., Behar, E., Beheshtipour, B., Belmont, R., Berger, E., Bernardini, F., Bianchi, S., Bisnovatyi-Kogan, G., Blasi, P., Blay, P., Bodaghee, A., Boer, M., Boettcher, M., Bogdanov, S., Bombaci, I., Bonino, R., Braga, J., Brandt, W., Brez, A., Bucciantini, N., Burderi, L., Caiazzo, I., Campana, R., Campana, S., Capitanio, F., Cappi, M., Cardillo, M., Casella, P., Catmabacak, O., Cenko, B., Cerda-Duran, P., Cerruti, C., Chaty, S., Chauvin, M., Chen, Y., Chenevez, J., Chernyakova, M., Cheung Teddy, C. C., Christodoulou, D., Connell, P., Corbet, R., Coti Zelati, F., Covino, S., Cui, W., Cusumano, G., D'Ai, A., D'Ammando, F., Dadina, M., Dai, Z., De Rosa, A., De Ruvo, L., Degenaar, N., Del Santo, M., Del Zanna, L., Dewangan, G., Di Cosimo, S., Di Lalla, N., Di Persio, G., Di Salvo, T., Dias, T., Done, C., Dovciak, M., Doyle, G., Ducci, L., Elsner, R., Enoto, T., Escada, J., Esposito, P., Eyles, C., Fabiani, S., Falanga, M., Falocco, S., Fan, Y., Fender, R., Feroci, M., Ferrigno, C., Forman, W., Foschini, L., Fragile, C., Fuerst, F., Fujita, Y., Gasent-Blesa, J. L., Gelfand, J., Gendre, B., Ghirlanda, G., Ghisellini, G., Giroletti, M., Goetz, D., Gogus, E., Gomez, J. L., Gonzalez, D., Gonzalez-Riestra, R., Gotthelf, E., Gou, L., Grandi, P., Grinberg, V., Grise, F., Guidorzi, C., Gurlebeck, N., Guver, T., Haggard, D., Hardcastle, M., Hartmann, D., Haswell, C., Heger, A., Hernanz, M., Heyl, J., Ho, L., Hoormann, J., Horak, J., Huovelin, J., Huppenkothen, D., Iaria, R., Inam Sitki, C., Ingram, A., Israel, G., Izzo, L., Burgess, M., Jackson, M., Ji, L., Jiang, J., Johannsen, T., Jones, C., Jorstad, S., Kajava, J. J E, Kalamkar, M., Kalemci, E., Kallman, T., Kamble, A., Kislat, F., Kiss, M., Klochkov, D., Koerding, E., Kolehmainen, M., Koljonen, K., Komossa, S., Kong, A., Korpela, S., Kowalinski, M., Krawczynski, H., Kreykenbohm, I., Kuss, M., Lai, D., Lan, M., Larsson, J., Laycock, S., Lazzati, D., Leahy, D., Li, H., Li, J., Li, L. X., Li, T., Li, Z., Linares, M., Lister, M., Liu, H., Lodato, G., Lohfink, A., Longo, F., Luna, G., Lutovinov, A., Mahmoodifar, S., Maia, J., Mainieri, V., Maitra, C., Maitra, D., Majczyna, A., Maldera, S., Malyshev, D., Manfreda, A., Manousakis, A., Manuel, R., Margutti, R., Marinucci, A., Markoff, S., Marscher, A., Marshall, H., Massaro, F., McLaughlin, M., Medina-Tanco, G., Mehdipour, M., Middleton, M., Mignani, R., Mimica, P., Mineo, T., Mingo, B., Miniutti, G., Mirac, S. M., Morlino, G., Motlagh, A. V., Motta, S. E., Mushtukov, A., Nagataki, S., Nardini, F., Nattila, J., Navarro, G. J., Negri, B., Negro, M., Nenonen, S., Neustroev, V., Nicastro, F., Norton, A., Nucita, A., O'Brien, P., O'Dell, S., Odaka, H., Olmi, B., Omodei, N., Orienti, M., Orlandini, M., Osborne, J., Pacciani, L., Paliya, V. S., Papadakis, I., Papitto, A., Paragi, Z., Pascal, P., Paul, B., Pavan, L., Pellizzoni, A., Perinati, E., Pesce-Rollins, M., Piconcelli, E., Pili, A. G., Pilia, M., Pohl, Martin, Ponti, G., Porquet, D., Possenti, A., Postnov, K., Prandoni, I., Produit, N., Puehlhofer, G., Ramsey, B., Razzano, M., Rea, N., Reig, P., Reinsch, K., Reiprich, T., Reynolds, M., Risaliti, G., Roberts, T., Rodriguez, J., Rossi, M. E., Rosswog, S., Rozanska, A., Rubini, A., Rudak, B., Russell, D., Ryde, F., Sabatini, S., Sala, G., Salvati, M., Sasaki, M., Savolainen, T., Saxton, R., Scaringi, S., Schawinski, K., Schulz, N. S., Schwope, A., Severgnini, P., Sharon, M., Shaw, A., Shearer, A., Shesheng, X., Shih, I. C., Silva, K., Silva, R., Silver, E., Smale, A., Spada, F., Spandre, G., Stamerra, A., Stappers, B., Starrfield, S., Stawarz, L., Stergioulas, N., Stevens, A., Stiele, H., Suleimanov, V., Sunyaev, R., Slowikowska, A., Tamborra, F., Tavecchio, F., Taverna, R., Tiengo, A., Tolos, L., Tombesi, F., Tomsick, J., Tong, H., Torok, G., Torres, D. F., Tortosa, A., Tramacere, A., Trimble, V., Trinchieri, G., Tsygankov, S., Tuerler, M., Turriziani, S., Ursini, F., Uttley, P., Varniere, P., Vincent, F., Vurgun, E., Wang, C., Wang, Z., Watts, A., Wheeler, J. C., Wiersema, K., Wijnands, R., Wilms, J., Wolter, A., Wood, K., Wu, K., Wu, X., Xiangyu, W., Xie, F., Xu, R., Yan, S. P., Yang, J., Yu, W., Yuan, F., Zajczyk, A., Zanetti, D., Zanin, R., Zanni, C., Zappacosta, L., Zdziarski, A. A., Zech, A., Zhang, H., Zhang, S., Zhang, W., Zoghbi, A., den Herder, Jan-Willem A., Takahashi, Tadayuki, Bautz, Marshall, Istituto di Astrofisica e Planetologia Spaziali, University of Pisa, University of Geneva, Max Planck Institute for Extraterrestrial Physics, CSIC, Tsinghua University, Polish Academy of Sciences, Université de Strasbourg, Czech Academy of Sciences, Roma Tre University, KTH Royal Institute of Technology, University of Turku, Universidad de Valencia, Instituto Nacional de Tecnica Aeroespacial, University of Tübingen, INAF—Osservatorio Astronomico di Brera, University of Amsterdam, National Aeronautics and Space Administration, University College London, ASI Science Data Center, Ioffe Institute, Agenzia Spaziale Italiana, Max-Planck-Institut für Astrophysik, INAF Osservatorio Astronomico di Capodimonte, European Space Research and Technology Centre, University of Michigan, Ann Arbor, Michigan State University, INFN, Sezione di Torino, IRAP, Università La Sapienza, INFN Pisa, University of Bath, European Space Astronomy Centre, Stony Brook University, Université Grenoble Alpes, Istituto Nazionale di Fisica Nucleare (INFN), Russian Academy of Sciences, University of Padova, Autonomous University of Barcelona, Effat University, Danmarks Tekniske Universitet, Osservatorio Astrofisico Di Arcetri, Florence, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Max Planck Institute for Radio Astronomy, Buein Zahra Technical University, Osservatorio Astronomico Cagliari, Middle East Technical University, Universidad de Cantabria, Osservatorio Astronomicodi Roma, Technion-Israel Institute of Technology, Washington University St. Louis, Harvard University, New York University Abu Dhabi, Space Research Institute of the Russian Academy of Sciences, Georgia College, Centre National de la Recherche Scientifique (CNRS), North West University, Columbia University, Sapienza University of Rome, Instituto Nacional de Pesquisas Espaciais, Pennsylvania State University, University of Cagliari, University of British Columbia, INAF/IASF Bologna, INAF, Osservatorio Astronomico di Roma, Sabanci University, Université Paris Diderot, Nanjing University, Dublin City University, Naval Research Laboratory, University of Massachusetts Lowell, University of Maryland, Baltimore, Purdue University, INAF-IASF Palermo, University of Palermo, Inter-University Centre for Astronomy and Astrophysics India, Durham University, Armagh Observatory, NASA Goddard Space Flight Center, Universidade de Coimbra, INAF/IASF Milano, International Space Science Institute, University of Naples Federico II, CAS - Purple Mountain Observatory, University of Oxford, College of Charleston, California Institute of Technology, Osaka University, University of the Virgin Islands, European Space Agency - ESA, Chinese Academy of Sciences, Massachusetts Institute of Technology, University of Bremen, Istanbul University, McGill University, University of Hertfordshire, Clemson University, Open University Milton Keynes, Monash University, University of Helsinki, Cardiff University, CAS - Institute of High Energy Physics, Fudan University, Perimeter Institute for Theoretical Physics, Boston University, Radboud University Nijmegen, National Tsing Hua University, Friedrich-Alexander University Erlangen-Nürnberg, Cornell University, Oregon State University, University of Calgary, Kavli Institute for Astronomy and Astrophysics, XiangTan University, Guangxi University, University of Milano, University of Cambridge, Università Degli Studi di Trieste, Universidad de Buenos Aires, European Southern Observatory, Wheaton College, National Centre for Nuclear Research, Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, New York University, West Virginia University, Universidad Nacional Autónoma de México, SRON Netherlands Institute for Space Research, University of Leicester, Gran Sasso Science Institute, RIKEN, Keele University, Oxford Instruments Analytical Oy, University of Salento, JAXA Institute of Space and Astronautical Science, University of Florence, Kavli Institute for Particle Astrophysics and Cosmology, University of Crete, Joint Institute for VLBI in Europe, Université Paul Sabatier, Raman Research Institute, Lomonosov Moscow State University, Foundation for Research and Technology - Hellas, University of Göttingen, Argelander-Institut für Astronomie, Leiden University, Stockholm University, Polytechnic University of Catalonia, Metsähovi Radio Observatory, Swiss Federal Institute of Technology Zurich, Leibniz Institut für Astrophysik Potsdam, University of Alberta, University of Southampton, National University of Ireland, Galway, Paris Observatory, INAF—Osservatorio Astrofisico di Torino, University of Manchester, Arizona State University, Jagiellonian University in Kraków, Aristotle University of Thessaloniki, University of Zielona Gora, Istituto Universitario di Studi Superiori di Pavia, University of Maryland, College Park, University of California Berkeley, Silesian University in Opava, University of California Irvine, Università di Roma Tor Vergata, Institut national de physique nucléaire et de physique des particules, Université Pierre and Marie Curie, Tongji University, University of Texas at Austin, Peking University, CAS - Shanghai Astronomical Observatory, Technische Universität Darmstadt, Los Alamos National Laboratory, Aalto-yliopisto, and Aalto University

Subjects
X-ray Astronomy, X-ray optics, Polarimetry, Gas Pixel Detector
Abstract

XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to X-ray Astronomy. At the time of writing XIPE is in a competitive phase A as fourth medium size mission of ESA (M4). It promises to reopen the polarimetry window in high energy Astrophysics after more than 4 decades thanks to a detector that efficiently exploits the photoelectric effect and to X-ray optics with large effective area. XIPE uniqueness is time-spectrally-spatially-resolved X-ray polarimetry as a breakthrough in high energy astrophysics and fundamental physics. Indeed the payload consists of three Gas Pixel Detectors at the focus of three X-ray optics with a total effective area larger than one XMM mirror but with a low weight. The payload is compatible with the fairing of the Vega launcher. XIPE is designed as an observatory for X-ray astronomers with 75 % of the time dedicated to a Guest Observer competitive program and it is organized as a consortium across Europe with main contributions from Italy, Germany, Spain, United Kingdom, Poland, Sweden.

Published
2016

28. Supplement: Localization and broadband follow-up of the gravitational-wave transient GW150914

Author

Abbott, B. P., Abbott, R., Abbott, T. D., Abernathy, M. R., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allocca, A., Altin, P. A., Anderson, S. B., Anderson, W. G., Arai, K., Araya, M. C., Arceneaux, C. C., Areeda, J. S., Arnaud, N., Arun, K. G., Ascenzi, S., Ashton, G., Ast, M., Aston, S. M., Astone, P., Aufmuth, P., Aulbert, C., Babak, S., Bacon, P., Bader, M. K. M., Baker, P. T., Baldaccini, F., Ballardin, G., Ballmer, S. W., Barayoga, J. C., Barclay, S. E., Barish, B. C., Barker, D., Barone, F., Barr, B., Barsotti, L., Barsuglia, M., Barta, D., Barthelmy, S., Bartlett, J., Bartos, I., Bassiri, R., Basti, A., Batch, J. C., Baune, C., Bavigadda, V., Bazzan, M., Behnke, B., Bejger, M., Bell, A. S., Bell, C. J., Berger, B. K., Bergman, J., Bergmann, G., Berry, C. P. L., Bersanetti, D., Bertolini, A., Betzwieser, J., Bhagwat, S., Bhandare, R., Bilenko, I. A., Billingsley, G., Birch, J., Birney, R., Biscans, S., Bisht, A., Bitossi, M., Biwer, C., Bizouard, M. A., Blackburn, J. K., Blair, C. D., Blair, D. G., Blair, R. M., Bloemen, S., Bock, O., Bodiya, T. P., Boer, M., Bogaert, G., Bogan, C., Bohe, A., Bojtos, P., Bond, C., Bondu, F., Bonnand, R., Boom, B. A., Bork, R., Boschi, V., Bose, S., Bouffanais, Y., Bozzi, A., Bradaschia, C., Brady, P. R., Braginsky, V. B., Branchesi, M., Brau, J. E., Briant, T., Brillet, A., Brinkmann, M., Brisson, V., Brockill, P., Brooks, A. F., Brown, D. A., Brown, D. D., Brown, N. M., Buchanan, C. C., Buikema, A., Bulik, T., Bulten, H. J., Buonanno, A., Buskulic, D., Buy, C., Byer, R. L., Cadonati, L., Cagnoli, G., Cahillane, C., Bustillo, J. C., Callister, T., Calloni, E., Camp, J. B., Cannon, K. C., Cao, J., Capano, C. D., Capocasa, E., Carbognani, F., Caride, S., Diaz, J. C., Casentini, C., Caudill, S., Cavaglià, M., Cavalier, F., Cavalieri, R., Cella, G., Cepeda, C. B., Baiardi, L. C., Cerretani, G., Cesarini, E., Chakraborty, R., Chalermsongsak, T., Chamberlin, S. J., Chan, M., Chao, S., Charlton, P., Chassande-Mottin, E., Chen, H. Y., Chen, Y., Cheng, C., Chincarini, A., Chiummo, A., Cho, H. S., Cho, M., Chow, J. H., Christensen, N., Chu, Q., Chua, S., Chung, S., Ciani, G., Clara, F., Clark, J. A., Cleva, F., Coccia, E., Cohadon, P. -F, Colla, A., Collette, C. G., Cominsky, L., Constancio, M., Conte, A., Conti, L., Cook, D., Corbitt, T. R., Cornish, N., Corsi, A., Cortese, S., Costa, C. A., Coughlin, M. W., Coughlin, S. B., Coulon, J. -P, Countryman, S. T., Couvares, P., Cowan, E. E., Coward, D. M., Cowart, M. J., Coyne, D. C., Coyne, R., Craig, K., Creighton, J. D. E., Cripe, J., Crowder, S. G., Cumming, A., Cunningham, L., Cuoco, E., Dal Canton, T., Danilishin, S. L., Antonio de Ugarte Postigo, Danzmann, K., Darman, N. S., Dattilo, V., Dave, I., Daveloza, H. P., Davier, M., Davies, G. S., Daw, E. J., Day, R., Debra, D., Debreczeni, G., Degallaix, J., Laurentis, M., Deléglise, S., Del Pozzo, W., Denker, T., Dent, T., Dereli, H., Dergachev, V., Derosa, R. T., Rosa, R., Desalvo, R., Dhurandhar, S., Díaz, M. C., Di Fiore, L., Di Giovanni, M., Di Lieto, A., Di Pace, S., Di Palma, I., Di Virgilio, A., Dojcinoski, G., Dolique, V., Donovan, F., Dooley, K. L., Doravari, S., Douglas, R., Downes, T. P., Drago, M., Drever, R. W. P., Driggers, J. C., Du, Z., Ducrot, M., Dwyer, S. E., Edo, T. B., Edwards, M. C., Effler, A., Eggenstein, H. -B, Ehrens, P., Eichholz, J., Eikenberry, S. S., Engels, W., Essick, R. C., Etzel, T., Evans, M., Evans, T. M., Everett, R., Factourovich, M., Fafone, V., Fair, H., Fairhurst, S., Fan, X., Fang, Q., Farinon, S., Farr, B., Farr, W. M., Favata, M., Fays, M., Fehrmann, H., Fejer, M. M., Ferrante, I., Ferreira, E. C., Ferrini, F., Fidecaro, F., Fiori, I., Fiorucci, D., Fisher, R. P., Flaminio, R., Fletcher, M., Fournier, J. -D, Franco, S., Frasca, S., Frasconi, F., Frei, Z., Freise, A., Frey, R., Frey, V., Fricke, T. T., Fritschel, P., Frolov, V. V., Fulda, P., Fyffe, M., Gabbard, H. A. G., Gair, J. R., Gammaitoni, L., Gaonkar, S. G., Garufi, F., Gatto, A., Gaur, G., Gehrels, N., Gemme, G., Gendre, B., Genin, E., Gennai, A., George, J., Gergely, L., Germain, V., Ghosh, A., Ghosh, S., Giaime, J. A., Giardina, K. D., Giazotto, A., Gill, K., Glaefke, A., Goetz, E., Goetz, R., Gondan, L., González, G., Castro, J. M. G., Gopakumar, A., Gordon, N. A., Gorodetsky, M. L., Gossan, S. E., Gosselin, M., Gouaty, R., Graef, C., Graff, P. B., Granata, M., Grant, A., Gras, S., Gray, C., Greco, G., Green, A. C., Groot, P., Grote, H., Grunewald, S., Guidi, G. M., Guo, X., Gupta, A., Gupta, M. K., Gushwa, K. E., Gustafson, E. K., Gustafson, R., Hacker, J. J., Hall, B. R., Hall, E. D., Hammond, G., Haney, M., Hanke, M. M., Hanks, J., Hanna, C., Hannam, M. D., Hanson, J., Hardwick, T., Harms, J., Harry, G. M., Harry, I. W., Hart, M. J., Hartman, M. T., Haster, C. -J, Haughian, K., Heidmann, A., Heintze, M. C., Heitmann, H., Hello, P., Hemming, G., Hendry, M., Heng, I. S., Hennig, J., Heptonstall, A. W., Heurs, M., Hild, S., Hoak, D., Hodge, K. A., Hofman, D., Hollitt, S. E., Holt, K., Holz, D. E., Hopkins, P., Hosken, D. J., Hough, J., Houston, E. A., Howell, E. J., Hu, Y. M., Huang, S., Huerta, E. A., Huet, D., Hughey, B., Husa, S., Huttner, S. H., Huynh-Dinh, T., Idrisy, A., Indik, N., Ingram, D. R., Inta, R., Isa, H. N., Isac, J. -M, Isi, M., Islas, G., Isogai, T., Iyer, B. R., Izumi, K., Jacqmin, T., Jang, H., Jani, K., Jaranowski, P., Jawahar, S., Jiménez-Forteza, F., Johnson, W. W., Jones, D. I., Jones, R., Jonker, R. J. G., Ju, L., K, H., Kalaghatgi, C. V., Kalogera, V., Kandhasamy, S., Kang, G., Kanner, J. 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H., Wester, W., Yanny, B., Zuntz, J., Dark Energy Survey, For The, Gw-Em, The Dark Energy Camera Collaborations, Connaughton, V., Burns, E., Goldstein, A., Briggs, M. S., Hui, C. M., Jenke, P., Wilson-Hodge, C. A., Bhat, P. N., Bissaldi, E., Cleveland, W., Fitzpatrick, G., Giles, M. M., Gibby, M. H., Greiner, J., Kienlin, A., Kippen, R. M., Mcbreen, S., Mailyan, B., Meegan, C. A., Paciesas, W. S., Preece, R. D., Roberts, O., Sparke, L., Stanbro, M., Toelge, K., Veres, P., Yu, H. -F, Blackburn, L., Gbm, For The Fermi Collaboration, Ackermann, M., Ajello, M., Albert, A., Anderson, B., Atwood, W. B., Axelsson, M., Baldini, L., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Bonino, R., Bottacini, E., Brandt, T. J., Bruel, P., Buson, S., Caliandro, G. A., Cameron, R. A., Caragiulo, M., Caraveo, P. A., Cavazzuti, E., Charles, E., Chekhtman, A., Chiang, J., Chiaro, G., Ciprini, S., Cohen-Tanugi, J., Cominsky, L. 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V., Negro, M., Nuss, E., Ohsugi, T., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Racusin, J. L., Rainò, S., Rando, R., Razzaque, S., Reimer, A., Reimer, O., Salvetti, D., Saz Parkinson, P. M., Sgrò, C., Simone, D., Siskind, E. J., Spada, F., Spandre, G., Spinelli, P., Suson, D. J., Tajima, H., Thayer, J. B., Thompson, D. J., Tibaldo, L., Torres, D. F., Troja, E., Uchiyama, Y., Venters, T. M., Vianello, G., Wood, K. S., Wood, M., Zhu, S., Zimmer, S., Lat, For The Fermi Collaboration, Brocato, E., Cappellaro, E., Covino, S., Grado, A., Nicastro, L., Palazzi, E., Pian, E., Amati, L., Antonelli, L. A., Capaccioli, M., D Avanzo, P., D Elia, V., Getman, F., Giuffrida, G., Iannicola, G., Limatola, L., Lisi, M., Marinoni, S., Marrese, P., Melandri, A., Piranomonte, S., Possenti, A., Pulone, L., Rossi, A., Stamerra, A., Stella, L., Testa, V., Tomasella, L., Yang, S., for the GRAvitational Wave Inaf TeAm, Bazzano, A., Bozzo, E., Brandt, S., Courvoisier, T. J. -L, Ferrigno, C., Hanlon, L., Kuulkers, E., Laurent, P., Mereghetti, S., Roques, J. P., Savchenko, V., Ubertini, P., Integral, For The Collaboration, Kasliwal, M. M., Singer, L. P., Cao, Y., Duggan, G., Kulkarni, S. R., Bhalerao, V., Miller, A. A., Barlow, T., Bellm, E., Manulis, I., Rana, J., Laher, R., Masci, F., Surace, J., Rebbapragada, U., Sistine, A., Sesar, B., Perley, D., Ferreti, R., Prince, T., Kendrick, R., Horesh, A., Intermediate Palomar Transient Factory, For The, Hurley, K., Golenetskii, S. V., Aptekar, R. L., Frederiks, D. D., Svinkin, D. S., Rau, A., Zhang, X., Smith, D. M., Cline, T., Krimm, H., Interplanetary Network, For The, Abe, F., Doi, M., Fujisawa, K., Kawabata, K. S., Morokuma, T., Motohara, K., Tanaka, M., Ohta, K., Yanagisawa, K., Yoshida, M., J-Gem, For The Collaboration, Baltay, C., Rabinowitz, D., Ellman, N., Rostami, S., La Silla--Quest Survey, For The, Bersier, D. F., Bode, M. F., Collins, C. A., Copperwheat, C. M., Darnley, M. J., Galloway, D. K., Gomboc, A., Kobayashi, S., Mazzali, P., Mundell, C. G., Piascik, A. S., Pollacco, Don, Steele, I. A., Ulaczyk, K., for the Liverpool Telescope Collaboration, Broderick, J. W., Fender, R. P., Jonker, P. G., Rowlinson, A., Stappers, B. W., Wijers, R. A. M. J., Low Frequency Array, For The, Lipunov, V., Gorbovskoy, E., Tyurina, N., Kornilov, V., Balanutsa, P., Kuznetsov, A., Buckley, D., Rebolo, R., Serra-Ricart, M., Israelian, G., Budnev, N. M., Gress, O., Ivanov, K., Poleshuk, V., Tlatov, A., Yurkov, V., Master, For The Collaboration, Kawai, N., Serino, M., Negoro, H., Nakahira, S., Mihara, T., Tomida, H., Ueno, S., Tsunemi, H., Matsuoka, M., Maxi, For The Collaboration, Croft, S., Feng, L., Franzen, T. M. O., Gaensler, B. M., Johnston-Hollitt, M., Kaplan, D. L., Morales, M. F., Tingay, S. J., Wayth, R. B., Williams, A., Murchison Wide-Field Array, For The, Smartt, S. J., Chambers, K. C., Smith, K. W., Huber, M. E., Young, D. R., Wright, D. E., Schultz, A., Denneau, L., Flewelling, H., Magnier, E. A., Primak, N., Rest, A., Sherstyuk, A., Stalder, B., Stubbs, C. W., Tonry, J., Waters, C., Willman, M., for the Pan-STARRS Collaboration, Olivares E, F., Campbell, H., Kotak, R., Sollerman, J., Smith, M., Dennefeld, M., Anderson, J. P., Botticella, M. T., Chen, T. -W, Valle, M. D., Elias-Rosa, N., Fraser, M., Inserra, C., Kankare, E., Kupfer, T., Harmanen, J., Galbany, L., Le Guillou, L., Lyman, J. D., Maguire, K., Mitra, A., Nicholl, M., Razza, A., Terreran, G., Valenti, S., Gal-Yam, A., Pessto, For The Collaboration, Ćwiek, A., Ćwiok, M., Mankiewicz, L., Opiela, R., Zaremba, M., Żarnecki, A. F., for the Pi of the Sky Collaboration, Onken, C. A., Scalzo, R. A., Schmidt, B. P., Wolf, C., Yuan, F., for the SkyMapper Collaboration, Evans, P. A., Kennea, J. A., Burrows, D. N., Campana, S., Cenko, S. B., Marshall, F. E., Nousek, J., O Brien, P., Osborne, J. P., Palmer, D., Perri, M., Racusin, J., Siegel, M., Tagliaferri, G., for the Swift Collaboration, Klotz, A., Turpin, D., Laugier, R., Tarot, For The, Zadko, National Observatory, Algerian, Pu Collaboration, C., Beroiz, M., Peñuela, T., Macri, L. M., Oelkers, R. J., Lambas, D. G., Vrech, R., Cabral, J., Colazo, C., Dominguez, M., Sanchez, B., Gurovich, S., Lares, M., Marshall, J. L., Depoy, D. L., Padilla, N., Pereyra, N. A., Benacquista, M., Toros, For The Collaboration, Tanvir, N. R., Wiersema, K., Levan, A. J., Steeghs, D., Hjorth, J., Fynbo, J. P. U., Malesani, D., Milvang-Jensen, B., Watson, D., Irwin, M., Fernandez, C. G., Mcmahon, R. G., Banerji, M., Gonzalez-Solares, E., Schulze, S., Postigo, A. U., Thoene, C. C., Cano, Z., Rosswog, S., Vista, For The Collaboration, LIGO, California Institute of Technology (CALTECH), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire des matériaux avancés (LMA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS), Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Particules de Montpellier (LUPM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), VIRGO, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Cosmology and Gravitation, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], gr-qc, ST/I001123/1, gravitational radiation, RCUK, FOS: Physical sciences, electromagnetic [current], General Relativity and Quantum Cosmology (gr-qc), gravitational radiation detector, localization, General Relativity and Quantum Cosmology, electromagnetic, emission [gravitational radiation], ST/L000709/1, Computer Science::Multimedia, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], ddc:520, Astrophysics - High Energy Astrophysical Phenomena, STFC, QB
Abstract

This Supplement provides supporting material for arXiv:1602.08492 . We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the current EM follow-up program. We compare the four probability sky maps produced for the gravitational-wave transient GW150914, and provide additional details of the EM follow-up observations that were performed in the different bands., Comment: For the main Letter, see arXiv:1602.08492

Published
2016
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29. On the relation between X-ray absorption and optical extinction in AGN

Author

Ordovás-Pascual, I., Mateos, S., Carrera, F. J., Wiersema, K., Caccianiga, A., Della Ceca, R., Severgnini, P., Moretti, A., Lucia Ballo, Alfred P. Sloan Foundation, National Science Foundation (US), Department of Energy (US), Japan Society for the Promotion of Science, National Aeronautics and Space Administration (US), European Commission, Higher Education Funding Council for England, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Ministerio de Economía y Competitividad (España), and Max Planck Society

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Active Galactic Nuclei, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Trabajo presentado al XII Scientific Meeting of the Spanish Astronomical Society (SEA), celebrado en Bilbao del 18 al 22 de julio de 2016., According to the Unified Model of Active Galactic Nuclei (AGN), an X-ray unabsorbed AGN should appear as unobscured in the optical (Type-1) and viceversa (Type-2). However, there is an important fraction (10-30%) of AGN whose optical and X-ray classifications do not match. To provide insight into the origin of such apparent discrepancies, we have conducted two analyses: 1) a detailed study of the UV-to-near-IR emission of two X-ray unabsorbed Type-2 AGN drawn from the Bright Ultra-Hard XMM-Newton Survey (BUXS); 2) a statistical analysis of the optical obscuration and X-ray absorption properties of 159 Type-1 AGN drawn from BUXS to determine the distribution of dust-to-gas ratios in AGN over a broad range of luminosities and redshifts. In our works we have also determined the impact of contamination from the AGN hosts in the optical classification of AGNs. Our studies are already provided very exciting results such as the detection of objects with extreme dust-to-gas ratios, between 300-10000 times below the Galactic dust-to-gas ratio., IO-P and FJC acknowledge financial support through grant AYA2015-64346-C2-1-P (MINECO/FEDER). Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, the U.S. Department of Energy, the National Aeronautics and Space Administration, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England. The STARLIGHT project is supported by the Brazilian agencies CNPq, CAPES and FAPESP and by the France-Brazil CAPES/Cofecub program.

Published
2016

31. The January 2015 outburst of a red nova in M 31

Author

Kurtenkov A., Pessev P., Tomov T., Barsukova E., Fabrika S., Vida K., Hornoch K., Ovcharov E., Goranskij V., Valeev A., Molnár L., Sárneczky K., Kostov A., Nedialkov P., Valenti S., Geier S., Wiersema K., Henze M., Shafter A., Muñoz Dimitrova R., Popov V., and Stritzinger M.

Subjects
cataclysmic variables, Novae
Abstract

© ESO 2015. Context. M31N 2015-01a (or M31LRN 2015) is a red nova that erupted in January 2015 - the first event of this kind observed in M 31 since 1988. Very few similar events have been confirmed as of 2015. Most of them are considered to be products of stellar mergers. Aims. Results of an extensive optical monitoring of the transient in the period January-March 2015 are presented. Methods. Eight optical telescopes were used for imaging. Spectra were obtained on the Large Altazimuth Telescope (BTA), the Gran Telecsopio Canarias (GTC) and the Rozhen 2 m telescope. Results. We present a highly accurate 70 d light curve and astrometry with a 0.05″uncertainty. The colour indices reached a minimum of 2-3 d before peak brightness and rapidly increased afterwards. The spectral type changed from F5I to F0I in 6 d before the maximum and then to K3I in the next 30 d. The luminosity of the transient was estimated to be 8.7-2.2+3.3 × 105 L⊙ during the optical maximum. Conclusions. Both the photometric and the spectroscopic results confirm that the object is a red nova, similar to V838 Monocerotis.

Published
2015

32. GRB hosts through cosmic time - VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1 < z < 3.6

Author

Kr��hler, T., Malesani, D., Fynbo, J. P. U., Hartoog, O. E., Hjorth, J., Jakobsson, P., Perley, D. A., Rossi, A., Schady, P., Schulze, S., Tanvir, N. R., Vergani, S. D., Wiersema, K., Afonso, P. M. J., Bolmer, J., Cano, Z., Covino, S., D'Elia, V., Postigo, A. de Ugarte, Filgas, R., Friis, M., Graham, J. F., Greiner, J., Goldoni, P., Gomboc, A., Hammer, F., Japelj, J., Kann, D. A., Kaper, L., Klose, S., Levan, A. J., Leloudas, G., Milvang-Jensen, B., Guelbenzu, A. Nicuesa, Palazzi, E., Pian, E., Piranomonte, S., Sanchez-Ramirez, R., Savaglio, S., Selsing, J., Tagliaferri, G., Vreeswijk, P. M., Watson, D. J., and Xu, D.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

[Abridged] We present data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1, 33 pages, 21 figures, published in A&A 581, A125 (2015)

Published
2015
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34. A trio of gamma-ray burst supernovae:GRB 120729A, GRB 130215A/SN 2013ez, and GRB 130831A/SN 2013fu

Author

Cano, Z., de Ugarte Postigo, A., Pozanenko, A., Butler, N., Thxf6ne, C. C., Guidorzi, C., Krxfchler, T., Gorosabel, J., Jakobsson, P., Leloudas, G., Malesani, D., Hjorth, J., Melandri, A., Mundell, C., Wiersema, K., D'Avanzo, P., Schulze, S., Gomboc, A., Johansson, A., Zheng, W., Kann, D. A., Knust, F., Varela, K., Akerlof, C. W., Bloom, J., Burkhonov, O., Cooke, E., de Diego, J. A., Dhungana, G., Farina, C., Ferrante, F. V., Flewelling, H. A., Fox, O. D., Fynbo, J., Gehrels, N., Georgiev, L., Cano, de Ugarte Postigo, Pozanenko, Butler, Thxf6ne, C. C., Guidorzi, Krxfchler, Gorosabel, Jakobsson, Leloudas, Malesani, Hjorth, Melandri, Mundell, Wiersema, D'Avanzo, Schulze, Gomboc, Johansson, Zheng, Kann, D. A., Knust, Varela, Akerlof, C. W., Bloom, Burkhonov, Cooke, de Diego, J. A., Dhungana, Farina, Ferrante, F. V., Flewelling, H. A., Fox, O. D., Fynbo, Gehrels, and Georgiev

Published
2014

35. Spectroscopy of the short-hard GRB 130603B

Author

de Ugarte Postigo, A., Thöne, C. C., Rowlinson, A., García-Benito, R., Levan, A. J., Gorosabel, J., Goldoni, P., Schulze, S., Zafar, T., Wiersema, K., Sánchez-Ramírez, R., Melandri, A., D’Avanzo, P., Oates, S., D’Elia, V., De Pasquale, M., Krühler, T., van der Horst, A. J., Xu, D., Watson, D., Piranomonte, S., Vergani, S. D., Milvang-Jensen, B., Kaper, L., Malesani, D., Fynbo, J. P. U., Cano, Z., Covino, S., Flores, H., Greiss, S., Hammer, F., Hartoog, O. E., Hellmich, S., Heuser, C., Hjorth, J., Jakobsson, P., Mottola, S., Sparre, M., Sollerman, J., Tagliaferri, G., Tanvir, N. R., Vestergaard, M., and Wijers, R. A. M. J.

Subjects
galaxies: spiral, gamma-ray burst: individual: GRB 130603B, galaxies: stellar content, galaxies: distances and redshifts
Published
2014

36. A Trio of GRB-SNe: GRB 120729A, GRB 130215A / SN 2013ez and GRB 130831A / SN 2013fu

Author

Cano, Z., Postigo, A. de Ugarte, Pozanenko, A., Butler, N., Thone, C. C., Guidorzi, C., Kruhler, T., Gorosabel, J., Jakobsson, P., Leloudas, G., Malesani, D., Hjorth, J., Melandri, A., Mundell, C., Wiersema, K., D'Avanzo, P., Schulze, S., Gomboc, A., Johansson, A., Zheng, W., Kann, D. A., Knust, F., Varela, K., Akerlof, C. W., Bloom, J., Burkhonov, O., Cooke, E., de Diego, J. A., Dhungana, G., Farina, C., Ferrante, F. V., Flewelling, H. A., Fox, O. D., Fynbo, J., Gehrels, N., Georgiev, L., Gonzalez, J. J., Greiner, J., Guver, T., Hartoog, O., Hatch, N., Jelinek, M, Kehoe, R., Klose, S., Klunko, E., Kopac, D., Kutyrev, A., Krugl, Y., Lee, W. H., Levan, A., Linkov, V., Matkin, A., Minikulov, N., Molotov, I., Prochaska, J. Xavier, Richer, M. G., Roman-Zuniga, C. G., Rumyantsev, V., Sanchez-Ramirez, R., Steele, I., Tanvir, N. R., Volnova, A., Watson, A. M., Xu, D., and Yuan, F.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present optical and near-infrared (NIR) photometry for three gamma-ray burst supernovae (GRB-SNe): GRB 120729A, GRB 130215A / SN 2013ez and GRB 130831A / SN 2013fu. In the case of GRB 130215A / SN 2013ez, we also present optical spectroscopy at t-t0=16.1 d, which covers rest-frame 3000-6250 Angstroms. Based on Fe II (5169) and Si (II) (6355), our spectrum indicates an unusually low expansion velocity of 4000-6350 km/s, the lowest ever measured for a GRB-SN. Additionally, we determined the brightness and shape of each accompanying SN relative to a template supernova (SN 1998bw), which were used to estimate the amount of nickel produced via nucleosynthesis during each explosion. We find that our derived nickel masses are typical of other GRB-SNe, and greater than those of SNe Ibc that are not associated with GRBs. For GRB 130831A / SN 2013fu, we use our well-sampled R-band light curve (LC) to estimate the amount of ejecta mass and the kinetic energy of the SN, finding that these too are similar to other GRB-SNe. For GRB 130215A, we take advantage of contemporaneous optical/NIR observations to construct an optical/NIR bolometric LC of the afterglow. We fit the bolometric LC with the millisecond magnetar model of Zhang & Meszaros (2001), which considers dipole radiation as a source of energy injection to the forward shock powering the optical/NIR afterglow. Using this model we derive an initial spin period of P=12 ms and a magnetic field of B=1.1 x 10^15 G, which are commensurate with those found for proposed magnetar central engines of other long-duration GRBs., Archive copy - 24 pages, 12 Figures, 3 Tables. Submitted to A&A

Published
2014
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37. GRB 080517: A local, low luminosity GRB in a dusty galaxy at z=0.09

Author

Stanway, E. R., Levan, A. J., Tanvir, N. R., Wiersema, K., van der Horst, A., Mundell, C. G., and Guidorzi, C.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics::Galaxy Astrophysics
Abstract

We present an analysis of the photometry and spectroscopy of the host galaxy of Swift-detected GRB 080517. From our optical spectroscopy, we identify a redshift of z = 0.089 +/- 0.003, based on strong emission lines, making this a rare example of a very local, low luminosity, long gamma ray burst. The galaxy is detected in the radio with a flux density of S(4.8GHz) =0.22 +/- 0.04mJy - one of relatively few known GRB hosts with a securely measured radio flux. Both optical emission lines and a strong detection at 22 um suggest that the host galaxy is forming stars rapidly, with an inferred star formation rate ~16 Msun/yr and a high dust obscuration (E(B-V )>1, based on sight-lines to the nebular emission regions). The presence of a companion galaxy within a projected distance of 25 kpc, and almost identical in redshift, suggests that star formation may have been triggered by galaxy-galaxy interaction. However, fitting of the remarkably flat spectral energy distribution from the ultraviolet through to the infrared suggests that an older, 500Myr post-starburst stellar population is present along with the ongoing star formation. We suggest that that the host galaxy of GRB 080517 is a valuable addition to the still very small sample of well-studied local gamma-ray burst hosts., 17 pages, minor edits to match accepted version

Published
2014
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38. Discordant optical and X-ray classification of AGN

Author

Ordovás-Pascual, I., Mateos, S., Carrera, F. J., and Wiersema, K.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics::Galaxy Astrophysics
Abstract

Trabajo presentado al Spanish X-ray Astronomy, celebrado en Santander del 3 al 5 de junoio de 2015., To provide insight into the apparent mismatch between the optical and X-ray absorption properties observed in 10-30% of Active Galactic Nuclei (AGN), we have conducted a detailed study of two X-ray unabsorbed AGN with a type-2 optical spectroscopic classification. In addition to high quality X-ray spectroscopic observations, that we used to determine both the AGN luminosities and absorption, we have a VLT/XSHOOTER UV-to-near-IR high resolution spectrum for each object, that we used to determine the AGN intrinsic emission corrected for both contamination from the AGN hosts and extinction. Thanks to the high quality data available for these two intriguing sources, we unveil the origin of the mismatch. The most likely explanation is that both objects have an intrinsically high dust-to-gas ratio.

Published
2014
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39. GRB 120422A/SN 2012bz: Bridging the Gap between Low- And High-Luminosity GRBs

Author

Schulze, S., Malesani, D., Cucchiara, A., Tanvir, N. R., Krühler, T., Postigo, A. de Ugarte, Leloudas, G., Lyman, J., Bersier, D., Wiersema, K., Perley, D. A., Schady, P., Gorosabel, J., Anderson, J. P., Castro-Tirado, A. J., Cenko, S. B., De Cia, A., Ellerbroek, L. E., Fynbo, J. P. U., Greiner, J., Hjorth, J., Kann, D. A., Kaper, L., Klose, S., Levan, A. J., Martín, S., O'Brien, P. T., Page, K. L., Pignata, G., Rapaport, S., Sánchez-Ramírez, R., Sollerman, J., Smith, I. A., Sparre, M., Thöne, C. C., Watson, D. J., Xu, D., Bauer, F. E., Bayliss, M., Björnsson, G., Bremer, M., Cano, Z., Covino, S., D'Elia, V., Frail, D. A., Geier, S., Goldoni, P., Hartoog, O. E., Jakobsson, P., Korhonen, H., Lee, K. Y., Milvang-Jensen, B., Nardini, M., Guelbenzu, A. Nicuesa, Oguri, M., Pandey, S. B., Petitpas, G., Rossi, A., Sandberg, A., Schmidl, S., Tagliaferri, G., Tilanus, R. P. J., Winters, J. M., Wright, D., and Wuyts, E.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with peak luminosities ($L_{\rm iso} < 10^{48.5}~\rm{erg\,s}^{-1}$) substantially lower than the average of the more distant ones ($L_{\rm iso} > 10^{49.5}~\rm{erg\,s}^{-1}$). The properties of several low-luminosity (low-$L$) GRBs indicate that they can be due to shock break-out, as opposed to the emission from ultrarelativistic jets. Owing to this, it is highly debated how both populations are connected, and whether there is a continuum between them. The burst at redshift $z=0.283$ from 2012 April 22 is one of the very few examples of intermediate-$L$ GRBs with a $\gamma$-ray luminosity of $L\sim10^{48.9}~\rm{erg\,s}^{-1}$ that have been detected up to now. Together with the robust detection of its accompanying supernova SN 2012bz, it has the potential to answer important questions on the origin of low- and high-$L$ GRBs and the GRB-SN connection. We carried out a spectroscopy campaign using medium- and low-resolution spectrographs at 6--10-m class telescopes, covering the time span of 37.3 days, and a multi-wavelength imaging campaign from radio to X-ray energies over a duration of $\sim270$ days. Furthermore, we used a tuneable filter centred at H$\alpha$ to map star formation in the host galaxy and the surrounding galaxies. We used these data to extract and model the properties of different radiation components and incorporate spectral-energy-distribution fitting techniques to extract the properties of the host galaxy. Modelling the light curve and spectral energy distribution from the radio to the X-rays revealed the blast-wave to expand with an initial Lorentz factor of $\Gamma_0\sim60$, low for a high-$L$ GRB, and that the afterglow had an exceptional low peak luminosity-density of $\lesssim2\times10^{30}~\rm{erg\,s}^{-1}\,\rm{Hz}^{-1}$ in the sub-mm. [Abridged], Comment: 30 pages, 17 figures, 9 tables; abstract is abridged; images are shown at reduced resolution; comments are welcome

Published
2014
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40. The Afterglow Of Grb 130427A From 1 To 10(16) Ghz

Author

Perley, D. A., Cenko, S. B., Corsi, A., Tanvir, N. R., Levan, A. J., Kann, D. A., Sonbas, E., Wiersema, K., Zheng, W., Zhao, X. -H., Bai, J. -M., Bremer, M., Castro-Tirado, A. J., Chang, L., Clubb, K. I., Frail, D., Fruchter, A., Gogus, E., Greiner, J., and Guver, T.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst (GRB) of the past 29 yr. Optical spectroscopy from Gemini-North reveals the redshift of the GRB to be z = 0.340, indicating that its unprecedented brightness is primarily the result of its relatively close proximity to Earth; the intrinsic luminosities of both the GRB and its afterglow are not extreme in comparison to other bright GRBs. We present a large suite of multiwavelength observations spanning from 300 s to 130 days after the burst and demonstrate that the afterglow shows relatively simple, smooth evolution at all frequencies, with no significant late-time flaring or rebrightening activity. The entire data set from 1 GHz to 10 GeV can be modeled as synchrotron emission from a combination of reverse and forward shocks in good agreement with the standard afterglow model, providing strong support to the applicability of the underlying theory and clarifying the nature of the GeV emission observed to last for minutes to hours following other very bright GRBs. A tenuous, wind-stratified circumburst density profile is required by the observations, suggesting a massive-star progenitor with a low mass-loss rate, perhaps due to low metallicity. GRBs similar in nature to GRB 130427A, inhabiting low-density media and exhibiting strong reverse shocks, are probably not uncommon but may have been difficult to recognize in the past owing to their relatively faint late-time radio emission; more such events should be found in abundance by the new generation of sensitive radio and millimeter instruments.

Published
2014

41. Spectroscopy of the short-hard GRB 130603B. The host galaxy and environment of a compact object merger

Author

de Ugarte Postigo, A., Thxf6ne, C. C., Rowlinson, A., Garcxeda-Benito, R., Levan, A. J., Gorosabel, J., Goldoni, P., Schulze, S., Zafar, T., Wiersema, K., Sxe1nchez-Ramxedrez, R., Melandri, A., D'Avanzo, P., Oates, S., D'Elia, V., De Pasquale, M., Krxfchler, T., van der Horst, A. J., Xu, D., Watson, D., Piranomonte, S., Vergani, S. D., Milvang-Jensen, B., Kaper, L., Malesani, D., Fynbo, J. P. U., Cano, Z., Covino, S., Flores, H., Greiss, S., Hammer, F., Hartoog, O. E., Hellmich, S., Heuser, C., Hjorth, J., Jakobsson, de Ugarte Postigo, Thxf6ne, C. C., Rowlinson, Garcxeda-Benito, Levan, A. J., Gorosabel, Goldoni, Schulze, Zafar, Wiersema, Sxe1nchez-Ramxedrez, Melandri, D'Avanzo, Oates, D'Elia, De Pasquale, Krxfchler, van der Horst, Watson, Piranomonte, Vergani, S. D., Milvang-Jensen, Kaper, Malesani, Fynbo, J. P. U., Cano, Covino, Flores, Greiss, Hammer, Hartoog, O. E., Hellmich, Heuser, and Hjorth

Published
2013

42. On the nature of the 'hostless' short GRBs

Author

Tunnicliffe, R. L., Levan, A. J., Tanvir, N. R., Rowlinson, A., Perley, D. A., Bloom, J. S., Cenko, S. B., O'Brien, P. T., Cobb, B. E., Wiersema, K., Malesani, D., de Ugarte Postigo, A., Hjorth, J., Fynbo, J. P. U., Jakobsson, P., Tunnicliffe, R. L., Levan, A. J., Tanvir, N. R., Rowlinson, Perley, D. A., Bloom, J. S., Cenko, S. B., O'Brien, P. T., Cobb, B. E., Wiersema, Malesani, de Ugarte Postigo, Hjorth, Fynbo, J. P. U., and Jakobsson

Published
2013

43. Supernova 2013ez = GRB 130215A

Author

de Ugarte Postigo, A., Cano, Z., Thoene, C.C., Gorosabel, J., Sanchez-Ramirez, R., Leloudas, G., Xu, D., Wiersema, K., Fynbo, J.P.U., Malesani, D., Hjorth, J., Jakobsson, P., Hartoog, O.E., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Abstract

A. de Ugarte Postigo, Instituto de Astrofisica de Andalucia (IAA), Consejo Superior de Investigaciones Cientificas (CSIC), and Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen; Z. Cano, University of Iceland; C. C. Thoene, IAA/CSIC; J. Gorosabel, IAA/CSIC and University of the Basque Country; R. Sanchez-Ramirez, IAA/CSIC; G. Leloudas, Oskar Klein Centre, Stockholm University, and Dark Cosmology Centre; D. Xu, Dark Cosmology Centre; K. Wiersema, University of Leicester; J. P. U. Fynbo, D. Malesani, and J. Hjorth, Dark Cosmology Centre; P. Jakobsson, University of Iceland; and O. E. Hartoog, University of Amsterdam, on behalf of a larger collaboration, report that they have been monitoring the optical counterpart of GRB 130215A (discovered with the Swift satellite on Feb. 15.064 UT; cf. D'Elia et al., posted at URL http://gcn.gsfc.nasa.gov/gcn3/14204.gcn3, GCN Circular 14204, citing position R.A. = 2h53m55s, Decl. = +13d22'14", equinox 2000.0, uncertainty 3'; also, Zheng et al., GCN Circ. 14205, at position end figures 54m00s.7, 23'43".7, and unfiltered CCD mag 14.2 on Feb. 15.072). The present authors obtained spectroscopy of the optical counterpart with the 10.4-m Gran Telescopio Canarias (GTC) at Roque de los Muchachos Observatory in La Palma, Spain, around Mar. 12.87, at 25.8 days after the onset of the gamma-ray burst, which is 16.2 days after the burst in the host-galaxy rest frame (z = 0.597; cf. Cucchiara et al., GCN Circ. 14207). Observations consisted of three 1200-s exposures with the R500R grism, covering the range 480-1000 nm, with a resolution of about 600. Due to the variable's low altitude at the time of the observations, the data had to be obtained at high airmass (between 1.6 and 2.2), and there were thin cirrus clouds, but the seeing was very good (0".6). At this epoch, the spectrum presents undulations typical of supernovae spectra, including a prominent bump at about 850 nm. The spectrum has been compared to a series of supernovae templates using SNID version 5.0 (Blondin and Tonry 2007, Ap.J. 666, 1024), and a good match is obtained when compared to a number of type-Ic supernovae, including broad- lined and normal events such as SN 2002ap and SN 1994I around maximum light and up to +10 days. When leaving the redshift unconstrained, the fit returns a value of z = 0.60 +/- 0.02, fully consistent with that obtained from absorption-line spectroscopy. A comparison of the spectrum of GRB 130215A with that of SN 2002ap has been posted by the authors at the following URL: http://www.iaa.es/~deugarte/GRBs/130215A/130215A.jpg.

Published
2013

44. A 'kilonova' associated with short-duration gamma-ray burst 130603B

Author

Tanvir, N. R., Levan, A. J., Fruchter, A. S., Hjorth, J., Hounsell, R. A., Wiersema, K., and Tunnicliffe, R.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract

Short-duration gamma-ray bursts (SGRBs) are intense flashes of cosmic gamma-rays, lasting less than ~2 s, whose origin is one of the great unsolved questions of astrophysics today. While the favoured hypothesis for their production, a relativistic jet created by the merger of two compact stellar objects (specifically, two neutron stars, NS-NS, or a neutron star and a black hole, NS-BH), is supported by indirect evidence such as their host galaxy properties, unambiguous confirmation of the model is still lacking. Mergers of this kind are also expected to create significant quantities of neutron-rich radioactive species, whose decay should result in a faint transient in the days following the burst, a so-called "kilonova". Indeed, it is speculated that this mechanism may be the predominant source of stable r-process elements in the Universe. Recent calculations suggest much of the kilonova energy should appear in the near-infrared (nIR) due to the high optical opacity created by these heavy r-process elements. Here we report strong evidence for such an event accompanying SGRB 130603B. If this simplest interpretation of the data is correct, it provides (i) support for the compact object merger hypothesis of SGRBs, (ii) confirmation that such mergers are likely sites of significant r-process production and (iii) quite possibly an alternative, un-beamed electromagnetic signature of the most promising sources for direct detection of gravitational waves., preprint of paper appearing in Nature (3 Aug 2013)

Published
2013

45. Molecular hydrogen in the damped Lyman \u03b1 system towards GRB 120815A at z = 2.36

Author

Krxfchler, T., Ledoux, C., Fynbo, J. P. U., Vreeswijk, P. M., Schmidl, S., Malesani, D., Christensen, L., De Cia, A., Hjorth, J., Jakobsson, P., Kann, D. A., Kaper, L., Vergani, S. D., Afonso, P. M. J., Covino, S., de Ugarte Postigo, A., D'Elia, V., Filgas, R., Goldoni, P., Greiner, J., Hartoog, O. E., Milvang-Jensen, B., Nardini, M., Piranomonte, S., Rossi, A., Sxe1nchez-Ramxedrez, R., Schady, P., Schulze, S., Sudilovsky, V., Tanvir, N. R., Tagliaferri, G., Watson, D. J., Wiersema, K., Wijers, R. A. M. J., Xu, D, Krxfchler, Ledoux, Fynbo, J. P. U., Vreeswijk, P. M., Schmidl, Malesani, Christensen, De Cia, Hjorth, Jakobsson, Kann, D. A., Kaper, Vergani, S. D., Afonso, P. M. J., Covino, de Ugarte Postigo, D'Elia, Filgas, Goldoni, Greiner, Hartoog, O. E., Milvang-Jensen, Nardini, Piranomonte, Rossi, Sxe1nchez-Ramxedrez, Schady, Schulze, Sudilovsky, Tanvir, N. R., Tagliaferri, Watson, D. J., Wiersema, Wijers, R. A. M. J., and D

Published
2013

46. GRB 130427A: host galaxy observations

Author

Wiersema, K., Vaduvescu, O., Tanvir, N., Levan, A., Hartoog, O., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Published
2013

48. GRB 130215A: detection of the SN with the 10.4m GTC

Author

de Ugarte Postigo, A., Thoene, C.C., Gorosabel, J., Sanchez-Ramirez, R., Leloudas, G., Cano, Z., Xu, D., Wiersema, K., Fynbo, J.P.U., Malesani, D., Hjorth, J., Jakobsson, P., Hartoog, O.E., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Published
2013

49. The Afterglow of GRB 130427A from 1 to 10^16 GHz

Author

Perley, D. A., Cenko, S. B., Corsi, A., Tanvir, N. R., Levan, A. J., Kann, D. A., Sonbas, E., Wiersema, K., Zheng, W., Zhao, X. -H., Bai, J. -M., Bremer, M., Castro-Tirado, A. J., Chang, L., Clubb, K. I., Frail, D., Fruchter, A., G��������, E., Greiner, J., G��ver, T., Horesh, A., Filippenko, A. V., Klose, S., Mao, J., Morgan, A. N., Pozanenko, A. S., Schmidl, S., Stecklum, B., Tanga, M., Volnova, A. A., Volvach, A. E., Wang, J. -G., Winters, J. -M., and Xin, Y. -X.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst of the past 29 years. Optical spectroscopy from Gemini-North reveals the redshift of the GRB to be z=0.340, indicating that its unprecedented brightness is primarily the result of its relatively close proximity to Earth; the intrinsic luminosities of both the GRB and its afterglow are not extreme in comparison to other bright GRBs. We present a large suite of multiwavelength observations spanning from 300 s to 130 d after the burst and demonstrate that the afterglow shows relatively simple, smooth evolution at all frequencies with no significant late-time flaring or rebrightening activity. The entire dataset from 1 GHz to 10 GeV can be modeled as synchrotron emission from a combination of reverse and forward shocks in good agreement with the standard afterglow model, providing strong support to the applicability of the underlying theory and clarifying the nature of the GeV emission observed to last for minutes to hours following other very bright GRBs. A tenuous, wind-stratified circumburst density profile is required by the observations, suggesting a massive-star progenitor with a low mass-loss rate, perhaps due to low metallicity. GRBs similar in nature to GRB 130427A, inhabiting low-density media and exhibiting strong reverse shocks, are probably not uncommon but may have been difficult to recognize in the past due to their relatively faint late-time radio emission; more such events should be found in abundance by the new generation of sensitive radio and millimeter instruments., Accepted to ApJ. Light curves and SEDs are available at http://www.astro.caltech.edu/~dperley/grb/130427a/data/

Published
2013
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