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31 results on '"Oates, S."'

2. Revealing the characteristics of the dark GRB 150309A: Dust extinguished or high-z?

Author

Castro-Tirado, A. J., primary, Gupta, R., additional, Pandey, S. B., additional, Nicuesa Guelbenzu, A., additional, Eikenberry, S., additional, Ackley, K., additional, Gerarts, A., additional, Valeev, A. F., additional, Jeong, S., additional, Park, I. H., additional, Oates, S. R., additional, Zhang, B.-B., additional, Sánchez-Ramírez, R., additional, Martín-Carrillo, A., additional, Tello, J. C., additional, Jelínek, M., additional, Hu, Y.-D., additional, Cunniffe, R., additional, Sokolov, V. V., additional, Guziy, S., additional, Ferrero, P., additional, Caballero-García, M. D., additional, Ror, A. K., additional, Aryan, A., additional, Castro Tirado, M. A., additional, Fernández-García, E., additional, Gritsevich, M., additional, Olivares, I., additional, Pérez-García, I., additional, Castro Cerón, J. M., additional, and Cepa, J., additional

Published
2024
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5. Panning for gold, but finding helium: Discovery of the ultra-stripped supernova SN 2019wxt from gravitational-wave follow-up observations

Author

Agudo, I., primary, Amati, L., additional, An, T., additional, Bauer, F. E., additional, Benetti, S., additional, Bernardini, M. G., additional, Beswick, R., additional, Bhirombhakdi, K., additional, de Boer, T., additional, Branchesi, M., additional, Brennan, S. J., additional, Brocato, E., additional, Caballero-García, M. D., additional, Cappellaro, E., additional, Castro Rodríguez, N., additional, Castro-Tirado, A. J., additional, Chambers, K. C., additional, Chassande-Mottin, E., additional, Chaty, S., additional, Chen, T.-W., additional, Coleiro, A., additional, Covino, S., additional, D’Ammando, F., additional, D’Avanzo, P., additional, D’Elia, V., additional, Fiore, A., additional, Flörs, A., additional, Fraser, M., additional, Frey, S., additional, Frohmaier, C., additional, Fulton, M., additional, Galbany, L., additional, Gall, C., additional, Gao, H., additional, García-Rojas, J., additional, Ghirlanda, G., additional, Giarratana, S., additional, Gillanders, J. H., additional, Giroletti, M., additional, Gompertz, B. P., additional, Gromadzki, M., additional, Heintz, K. E., additional, Hjorth, J., additional, Hu, Y.-D., additional, Huber, M. E., additional, Inkenhaag, A., additional, Izzo, L., additional, Jin, Z. P., additional, Jonker, P. G., additional, Kann, D. A., additional, Kool, E. C., additional, Kotak, R., additional, Leloudas, G., additional, Levan, A. J., additional, Lin, C.-C., additional, Lyman, J. D., additional, Magnier, E. A., additional, Maguire, K., additional, Mandel, I., additional, Marcote, B., additional, Mata Sánchez, D., additional, Mattila, S., additional, Melandri, A., additional, Michałowski, M. J., additional, Moldon, J., additional, Nicholl, M., additional, Nicuesa Guelbenzu, A., additional, Oates, S. R., additional, Onori, F., additional, Orienti, M., additional, Paladino, R., additional, Paragi, Z., additional, Perez-Torres, M., additional, Pian, E., additional, Pignata, G., additional, Piranomonte, S., additional, Quirola-Vásquez, J., additional, Ragosta, F., additional, Rau, A., additional, Ronchini, S., additional, Rossi, A., additional, Sánchez-Ramírez, R., additional, Salafia, O. S., additional, Schulze, S., additional, Smartt, S. J., additional, Smith, K. W., additional, Sollerman, J., additional, Srivastav, S., additional, Starling, R. L. C., additional, Steeghs, D., additional, Stevance, H. F., additional, Tanvir, N. R., additional, Testa, V., additional, Torres, M. A. P., additional, Valeev, A., additional, Vergani, S. D., additional, Vescovi, D., additional, Wainscost, R., additional, Watson, D., additional, Wiersema, K., additional, Wyrzykowski, Ł., additional, Yang, J., additional, Yang, S., additional, and Young, D. R., additional

Published
2023
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6. A blast from the infant Universe: The very high-zGRB 210905A

Author

Rossi, A., primary, Frederiks, D. D., additional, Kann, D. A., additional, De Pasquale, M., additional, Pian, E., additional, Lamb, G., additional, D’Avanzo, P., additional, Izzo, L., additional, Levan, A. J., additional, Malesani, D. B., additional, Melandri, A., additional, Nicuesa Guelbenzu, A., additional, Schulze, S., additional, Strausbaugh, R., additional, Tanvir, N. R., additional, Amati, L., additional, Campana, S., additional, Cucchiara, A., additional, Ghirlanda, G., additional, Della Valle, M., additional, Klose, S., additional, Salvaterra, R., additional, Starling, R. L. C., additional, Stratta, G., additional, Tsvetkova, A. E., additional, Vergani, S. D., additional, D’Aì, A., additional, Burgarella, D., additional, Covino, S., additional, D’Elia, V., additional, de Ugarte Postigo, A., additional, Fausey, H., additional, Fynbo, J. P. U., additional, Frontera, F., additional, Guidorzi, C., additional, Heintz, K. E., additional, Masetti, N., additional, Maiorano, E., additional, Mundell, C. G., additional, Oates, S. R., additional, Page, M. J., additional, Palazzi, E., additional, Palmerio, J., additional, Pugliese, G., additional, Rau, A., additional, Saccardi, A., additional, Sbarufatti, B., additional, Svinkin, D. S., additional, Tagliaferri, G., additional, van der Horst, A. J., additional, Watson, D. J., additional, Ulanov, M. V., additional, Wiersema, K., additional, Xu, D., additional, and Zhang, J., additional

Published
2022
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7. 10.4 m GTC observations of the nearby VHE-detected GRB 190829A/SN 2019oyw

Author

Hu, Y.-D., primary, Castro-Tirado, A. J., additional, Kumar, A., additional, Gupta, R., additional, Valeev, A. F., additional, Pandey, S. B., additional, Kann, D. A., additional, Castellón, A., additional, Agudo, I., additional, Aryan, A., additional, Caballero-García, M. D., additional, Guziy, S., additional, Martin-Carrillo, A., additional, Oates, S. R., additional, Pian, E., additional, Sánchez-Ramírez, R., additional, Sokolov, V. V., additional, and Zhang, B.-B., additional

Published
2021
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8. Observational constraints on the optical and near-infrared emission from the neutron star–black hole binary merger candidate S190814bv

Author

Ackley, K., primary, Amati, L., additional, Barbieri, C., additional, Bauer, F. E., additional, Benetti, S., additional, Bernardini, M. G., additional, Bhirombhakdi, K., additional, Botticella, M. T., additional, Branchesi, M., additional, Brocato, E., additional, Bruun, S. H., additional, Bulla, M., additional, Campana, S., additional, Cappellaro, E., additional, Castro-Tirado, A. J., additional, Chambers, K. C., additional, Chaty, S., additional, Chen, T.-W., additional, Ciolfi, R., additional, Coleiro, A., additional, Copperwheat, C. M., additional, Covino, S., additional, Cutter, R., additional, D’Ammando, F., additional, D’Avanzo, P., additional, De Cesare, G., additional, D’Elia, V., additional, Della Valle, M., additional, Denneau, L., additional, De Pasquale, M., additional, Dhillon, V. S., additional, Dyer, M. J., additional, Elias-Rosa, N., additional, Evans, P. A., additional, Eyles-Ferris, R. A. J., additional, Fiore, A., additional, Fraser, M., additional, Fruchter, A. S., additional, Fynbo, J. P. U., additional, Galbany, L., additional, Gall, C., additional, Galloway, D. K., additional, Getman, F. I., additional, Ghirlanda, G., additional, Gillanders, J. H., additional, Gomboc, A., additional, Gompertz, B. P., additional, González-Fernández, C., additional, González-Gaitán, S., additional, Grado, A., additional, Greco, G., additional, Gromadzki, M., additional, Groot, P. J., additional, Gutiérrez, C. P., additional, Heikkilä, T., additional, Heintz, K. E., additional, Hjorth, J., additional, Hu, Y.-D., additional, Huber, M. E., additional, Inserra, C., additional, Izzo, L., additional, Japelj, J., additional, Jerkstrand, A., additional, Jin, Z. P., additional, Jonker, P. G., additional, Kankare, E., additional, Kann, D. A., additional, Kennedy, M., additional, Kim, S., additional, Klose, S., additional, Kool, E. C., additional, Kotak, R., additional, Kuncarayakti, H., additional, Lamb, G. P., additional, Leloudas, G., additional, Levan, A. J., additional, Longo, F., additional, Lowe, T. B., additional, Lyman, J. D., additional, Magnier, E., additional, Maguire, K., additional, Maiorano, E., additional, Mandel, I., additional, Mapelli, M., additional, Mattila, S., additional, McBrien, O. R., additional, Melandri, A., additional, Michałowski, M. J., additional, Milvang-Jensen, B., additional, Moran, S., additional, Nicastro, L., additional, Nicholl, M., additional, Nicuesa Guelbenzu, A., additional, Nuttal, L., additional, Oates, S. R., additional, O’Brien, P. T., additional, Onori, F., additional, Palazzi, E., additional, Patricelli, B., additional, Perego, A., additional, Torres, M. A. P., additional, Perley, D. A., additional, Pian, E., additional, Pignata, G., additional, Piranomonte, S., additional, Poshyachinda, S., additional, Possenti, A., additional, Pumo, M. L., additional, Quirola-Vásquez, J., additional, Ragosta, F., additional, Ramsay, G., additional, Rau, A., additional, Rest, A., additional, Reynolds, T. M., additional, Rosetti, S. S., additional, Rossi, A., additional, Rosswog, S., additional, Sabha, N. B., additional, Sagués Carracedo, A., additional, Salafia, O. S., additional, Salmon, L., additional, Salvaterra, R., additional, Savaglio, S., additional, Sbordone, L., additional, Schady, P., additional, Schipani, P., additional, Schultz, A. S. B., additional, Schweyer, T., additional, Smartt, S. J., additional, Smith, K. W., additional, Smith, M., additional, Sollerman, J., additional, Srivastav, S., additional, Stanway, E. R., additional, Starling, R. L. C., additional, Steeghs, D., additional, Stratta, G., additional, Stubbs, C. W., additional, Tanvir, N. R., additional, Testa, V., additional, Thrane, E., additional, Tonry, J. L., additional, Turatto, M., additional, Ulaczyk, K., additional, van der Horst, A. J., additional, Vergani, S. D., additional, Walton, N. A., additional, Watson, D., additional, Wiersema, K., additional, Wiik, K., additional, Wyrzykowski, Ł., additional, Yang, S., additional, Yi, S.-X., additional, and Young, D. R., additional

Published
2020
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9. Multiwavelength observations of GRB 140629A

Author

Hu, Y.-D., primary, Oates, S. R., additional, Lipunov, V. M., additional, Zhang, B.-B., additional, Castro-Tirado, A. J., additional, Jeong, S., additional, Sánchez-Ramírez, R., additional, Tello, J. C., additional, Cunniffe, R., additional, Gorbovskoy, E., additional, Caballero-García, M. D., additional, Pandey, S. B., additional, Kornilov, V. G., additional, Tyurina, N. V., additional, Kuznetsov, A. S., additional, Balanutsa, P. V., additional, Gress, O. A., additional, Gorbunov, I., additional, Vlasenko, D. M., additional, Vladimirov, V. V., additional, Budnev, N. M., additional, Balakin, F., additional, Ershova, O., additional, Krushinski, V. V., additional, Gabovich, A. V., additional, Yurkov, V. V., additional, Gorosabel, J., additional, Moskvitin, A. S., additional, Burenin, R. A., additional, Sokolov, V. V., additional, Delgado, I., additional, Guziy, S., additional, Fernandez-García, E. J., additional, and Park, I. H., additional

Published
2019
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10. Multiwavelength observations of GRB 140629A: A long burst with an achromatic jet break in the optical and X-ray afterglow

Author

Hu, Y. -D., Oates, S. R., Lipunov, V. M., Zhang, B. -B., Castro-Tirado, A. J., Jeong, S., Sánchez-Ramírez, R., Tello, J. C., Cunniffe, R., Gorbovskoy, E., Caballero-García, M. D., Pandey, S. B., Kornilov, V. G., Tyurina, N. V., Kuznetsov, A. S., Balanutsa, P. V., Gress, O. A., Gorbunov, I., Vlasenko, D. M., Vladimirov, V. V., Budnev, N. M., Balakin, F., Ershova, O., Krushinski, V. V., Gabovich, A. V., Yurkov, V. V., Gorosabel, J., Moskvitin, A. S., Burenin, R. A., Sokolov, V. V., Delgado, I., Guziy, S., Fernandez-García, E. J., Park, I. H., Hu, Y. -D., Oates, S. R., Lipunov, V. M., Zhang, B. -B., Castro-Tirado, A. J., Jeong, S., Sánchez-Ramírez, R., Tello, J. C., Cunniffe, R., Gorbovskoy, E., Caballero-García, M. D., Pandey, S. B., Kornilov, V. G., Tyurina, N. V., Kuznetsov, A. S., Balanutsa, P. V., Gress, O. A., Gorbunov, I., Vlasenko, D. M., Vladimirov, V. V., Budnev, N. M., Balakin, F., Ershova, O., Krushinski, V. V., Gabovich, A. V., Yurkov, V. V., Gorosabel, J., Moskvitin, A. S., Burenin, R. A., Sokolov, V. V., Delgado, I., Guziy, S., Fernandez-García, E. J., and Park, I. H.

Abstract

Aims. We investigate the long gamma-ray burst (GRB) 140629A through multiwavelength observations to derive the properties of the dominant jet and its host galaxy. Methods. The afterglow and host galaxy observations were taken in the optical (Swift/UVOT and various facilities worldwide), infrared (Spitzer), and X-rays (Swift/XRT) between 40 s and 3 yr after the burst trigger. Results. Polarisation observations by the MASTER telescope indicate that this burst is weakly polarised. The optical spectrum contains absorption features, from which we confirm the redshift of the GRB as originating at z = 2.276 ± 0.001. We performed spectral fitting of the X-rays to optical afterglow data and find there is no strong spectral evolution. We determine the hydrogen column density NH to be 7.2 × 1021 cm−2 along the line of sight. The afterglow in this burst can be explained by a blast wave jet with a long-lasting central engine expanding into a uniform medium in the slow cooling regime. At the end of energy injection, a normal decay phase is observed in both the optical and X-ray bands. An achromatic jet break is also found in the afterglow light curves ∼0.4 d after trigger. We fit the multiwavelength data simultaneously with a model based on a numerical simulation and find that the observations can be explained by a narrow uniform jet in a dense environment with an opening angle of 6.7◦ viewed 3.8◦ off-axis, which released a total energy of 1.4 × 1054 erg. Using the redshift and opening angle, we find GRB 140629A follows both the Ghirlanda and Amati relations. From the peak time of the light curve, identified as the onset of the forward shock (181s after trigger), the initial Lorentz factor (Γ0) is constrained in the range 82-118. Fitting the host galaxy photometry, we find the host to be a low mass, star-forming galaxy with a star formation rate of log (SFR) = 1.1+−00.94 M yr−1. We obtain a value of the neutral hydrogen density by fitting the optical spectrum, log NHI = 21.0 ± 0.

Published
2019

11. X-shooter and ALMA spectroscopy of GRB 161023A

Author

de Ugarte Postigo, A., primary, Thöne, C. C., additional, Bolmer, J., additional, Schulze, S., additional, Martín, S., additional, Kann, D. A., additional, D’Elia, V., additional, Selsing, J., additional, Martin-Carrillo, A., additional, Perley, D. A., additional, Kim, S., additional, Izzo, L., additional, Sánchez-Ramírez, R., additional, Guidorzi, C., additional, Klotz, A., additional, Wiersema, K., additional, Bauer, F. E., additional, Bensch, K., additional, Campana, S., additional, Cano, Z., additional, Covino, S., additional, Coward, D., additional, De Cia, A., additional, de Gregorio-Monsalvo, I., additional, De Pasquale, M., additional, Fynbo, J. P. U., additional, Greiner, J., additional, Gomboc, A., additional, Hanlon, L., additional, Hansen, M., additional, Hartmann, D. H., additional, Heintz, K. E., additional, Jakobsson, P., additional, Kobayashi, S., additional, Malesani, D. B., additional, Martone, R., additional, Meintjes, P. J., additional, Michałowski, M. J., additional, Mundell, C. G., additional, Murphy, D., additional, Oates, S., additional, Salmon, L., additional, van Soelen, B., additional, Tanvir, N. R., additional, Turpin, D., additional, Xu, D., additional, and Zafar, T., additional

Published
2018
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12. GRB 171205A/SN 2017iuk: A local low-luminosity gamma-ray burst

Author

D’Elia, V., primary, Campana, S., additional, D’Aì, A., additional, De Pasquale, M., additional, Emery, S. W. K., additional, Frederiks, D. D., additional, Lien, A., additional, Melandri, A., additional, Page, K. L., additional, Starling, R. L. C., additional, Burrows, D. N., additional, Breeveld, A. A., additional, Oates, S. R., additional, O’Brien, P. T., additional, Osborne, J. P., additional, Siegel, M. H., additional, Tagliaferri, G., additional, Brown, P. J., additional, Cenko, S. B., additional, Svinkin, D. S., additional, Tohuvavohu, A., additional, and Tsvetkova, A. E., additional

Published
2018
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13. X-shooter and ALMA spectroscopy of GRB 161023A: A study of metals and molecules in the line of sight towards a luminous GRB

Author

Ministerio de Economía y Competitividad (España), European Commission, Fundación BBVA, Comisión Nacional de Investigación Científica y Tecnológica (Chile), Ministerio de Economía, Fomento y Turismo (Chile), German Research Foundation, Alexander von Humboldt Foundation, National Science Centre (Poland), Slovak Research and Development Agency, European Cooperation in Science and Technology, Ugarte Postigo, Antonio de, Thöne, Cristina Carina, Bolmer, J., Schulze, S., Martín, S., Kann, D.A., D'Elia, V., Selsing, J., Martin-Carrillo, A., Perley, D.A., Kim, S., Izzo, L., Sánchez-Ramírez, R., Guidorzi, C., Klotz, A., Wiersema, K., Bauer, F.E., Bensch, K., Campana, S., Cano, Z., Covino, Stefano, Coward, D., De Cia, A., de Gregorio-Monsalvo, Itziar, De Pasquale, M., Fynbo, J. P. U., Greiner, J., Gomboc, A., Hanlon, L., Hansen, M., Hartmann, D.H., Heintz, K.E., Jakobsson, P., Kobayashi, S., Malesani, D.B., Martone, R., Meintjes, P. J., Michalowski, M. J., Mundell, C. G., Murphy, D., Oates, S., Salmon, L., Van Soelen, B., Tanvir, N. R., Turpin, D., Xu, D., Zafar, T., Ministerio de Economía y Competitividad (España), European Commission, Fundación BBVA, Comisión Nacional de Investigación Científica y Tecnológica (Chile), Ministerio de Economía, Fomento y Turismo (Chile), German Research Foundation, Alexander von Humboldt Foundation, National Science Centre (Poland), Slovak Research and Development Agency, European Cooperation in Science and Technology, Ugarte Postigo, Antonio de, Thöne, Cristina Carina, Bolmer, J., Schulze, S., Martín, S., Kann, D.A., D'Elia, V., Selsing, J., Martin-Carrillo, A., Perley, D.A., Kim, S., Izzo, L., Sánchez-Ramírez, R., Guidorzi, C., Klotz, A., Wiersema, K., Bauer, F.E., Bensch, K., Campana, S., Cano, Z., Covino, Stefano, Coward, D., De Cia, A., de Gregorio-Monsalvo, Itziar, De Pasquale, M., Fynbo, J. P. U., Greiner, J., Gomboc, A., Hanlon, L., Hansen, M., Hartmann, D.H., Heintz, K.E., Jakobsson, P., Kobayashi, S., Malesani, D.B., Martone, R., Meintjes, P. J., Michalowski, M. J., Mundell, C. G., Murphy, D., Oates, S., Salmon, L., Van Soelen, B., Tanvir, N. R., Turpin, D., Xu, D., and Zafar, T.

Abstract

Context. Long gamma-ray bursts (GRBs) are produced during the dramatic deaths of massive stars with very short lifetimes, meaning that they explode close to the birth place of their progenitors. Over a short period they become the most luminous objects observable in the Universe, being perfect beacons to study high-redshift star-forming regions. Aims. We aim to use the afterglow of GRB 161023A at a redshift z = 2.710 as a background source to study the environment of the explosion and the intervening systems along its line of sight. Methods. For the first time, we complement ultraviolet (UV), optical and near-infrared (NIR) spectroscopy with millimetre spectroscopy using the Atacama Large Millimeter Array (ALMA), which allows us to probe the molecular content of the host galaxy. The X-shooter spectrum shows a plethora of absorption features including fine-structure and metastable transitions of Fe, Ni, Si, C, and O. We present photometry ranging from 43 s to over 500 days after the burst. Results. We infer a host-galaxy metallicity of [Zn/H] = -1.11 ± 0.07, which, corrected for dust depletion, results in [X/H] = -0.94 ± 0.08. We do not detect molecular features in the ALMA data, but we derive limits on the molecular content of log(N/cm) < 15.7 and log(N/cm, which are consistent with those that we obtain from the optical spectra, log(N/cm)< 15.2 and log(N/cm) < 14.5. Within the host galaxy, we detect three velocity systems through UV, optical and NIR absorption spectroscopy, all with levels that were excited by the GRB afterglow. We determine the distance from these systems to the GRB to be in the range between 0.7 and 1.0 kpc. The sight line to GRB 161023A shows nine independent intervening systems, most of them with multiple components. Conclusions. Although no molecular absorption was detected for GRB 161023A, we show that GRB millimetre spectroscopy is now feasible and is opening a new window on the study of molecular gas within star-forming galaxies at all redsh

Published
2018

14. GRB 171205A/SN 2017iuk: A local low-luminosity gamma-ray burst.

Author

D'Elia, V., Campana, S., D'Aì, A., De Pasquale, M., Emery, S. W. K., Frederiks, D. D., Lien, A., Melandri, A., Page, K. L., Starling, R. L. C., Burrows, D. N., Breeveld, A. A., Oates, S. R., O'Brien, P. T., Osborne, J. P., Siegel, M. H., Tagliaferri, G., Brown, P. J., Cenko, S. B., and Svinkin, D. S.

Subjects
GAMMA ray bursts, STELLAR luminosity function, COSMOLOGICAL constant, STELLAR populations, REDSHIFT
Abstract

Context. Gamma-ray bursts (GRBs) occurring in the local Universe constitute an interesting sub-class of the GRB family, since their luminosity is on average lower than that of their cosmological analogs. Attempts to understand in a global way this peculiar behaviour is still not possible, since the sample of low redshift GRBs is small, and the properties of individual objects are too different from each other. In addition, their closeness (and consequently high fluxes) make these sources ideal targets for extensive follow-up even with small telescopes, considering also that these GRBs are conclusively associated with supernova (SN) explosions. Aims. We aim to contribute to the study of local bursts by reporting the case of GRB 171205A. This source was discovered by Swift Burst Alert Telescope (BAT) on 2017, December 5 and soon associated with a low redshift host galaxy (z = 0.037), and an emerging SN (SN 2017iuk). Methods. We analyzed the full Swift dataset, comprising the UV-Optical Telescope (UVOT), X-ray Telescope (XRT) and BAT data. In addition, we employed the Konus-Wind high energy data as a valuable extension at γ-ray energies. Results. The photometric SN signature is clearly visible in the UVOT u, b and ν filters. The maximum emission is reached at ∼13 (rest frame) days, and the whole bump resembles that of SN 2006aj, but lower in magnitude and with a shift in time of +2 d. A prebump in the ν-band is also clearly visible, and this is the first time that such a feature is not observed achromatically in GRB–SNe. Its physical origin cannot be easily explained. The X-ray spectrum shows an intrinsic Hydrogen column density NH,int = 7.4+4.1−3.6 × 1020 N H , int = 7. 4 − 3.6 + 4.1 × 10 20 $ N_{\mathrm{H,int}} = 7.4^{+4.1}_{-3.6}\times 10^{20} $ cm−2, which is at the low end of the NH, int, even considering just low redshift GRBs. The spectrum also features a thermal component, which is quite common in GRBs associated with SNe, but whose origin is still a matter of debate. Finally, the isotropic energy in the γ-ray band, Eiso = 2.18+0.63−5.0 × 1049 E iso = 2. 18 − 0.50 + 0.63 × 10 49 $ E_{\mathrm{iso}} = 2.18^{+0.63}_{-0.50} \times 10^{49} $ erg, is lower than those of cosmological GRBs. Combining this value with the peak energy in the same band, Ep = 125+141−37 E p = 125 − 37 + 141 $ E_{\mathrm{p}}=125^{+141}_{-37} $ keV, implies that GRB 171205A is an outlier of the Amati relation, as are some other low redshift GRBs, and its emission mechanism should be different from that of canonical, farther away GRBs. [ABSTRACT FROM AUTHOR]

Published
2018
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15. The high-redshift gamma-ray burst GRB 140515A

Author

Melandri, A., primary, Bernardini, M. G., additional, D’Avanzo, P., additional, Sánchez-Ramírez, R., additional, Nappo, F., additional, Nava, L., additional, Japelj, J., additional, de Ugarte Postigo, A., additional, Oates, S., additional, Campana, S., additional, Covino, S., additional, D’Elia, V., additional, Ghirlanda, G., additional, Gafton, E., additional, Ghisellini, G., additional, Gnedin, N., additional, Goldoni, P., additional, Gorosabel, J., additional, Libbrecht, T., additional, Malesani, D., additional, Salvaterra, R., additional, Thöne, C. C., additional, Vergani, S. D., additional, Xu, D., additional, and Tagliaferri, G., additional

Published
2015
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16. The mysterious optical afterglow spectrum of GRB 140506A atz= 0.889

Author

Fynbo, J. P. U., primary, Krühler, T., additional, Leighly, K., additional, Ledoux, C., additional, Vreeswijk, P. M., additional, Schulze, S., additional, Noterdaeme, P., additional, Watson, D., additional, Wijers, R. A. M. J., additional, Bolmer, J., additional, Cano, Z., additional, Christensen, L., additional, Covino, S., additional, D’Elia, V., additional, Flores, H., additional, Friis, M., additional, Goldoni, P., additional, Greiner, J., additional, Hammer, F., additional, Hjorth, J., additional, Jakobsson, P., additional, Japelj, J., additional, Kaper, L., additional, Klose, S., additional, Knust, F., additional, Leloudas, G., additional, Levan, A., additional, Malesani, D., additional, Milvang-Jensen, B., additional, Møller, P., additional, Nicuesa Guelbenzu, A., additional, Oates, S., additional, Pian, E., additional, Schady, P., additional, Sparre, M., additional, Tagliaferri, G., additional, Tanvir, N., additional, Thöne, C. C., additional, de Ugarte Postigo, A., additional, Vergani, S., additional, Wiersema, K., additional, Xu, D., additional, and Zafar, T., additional

Published
2014
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17. The dark nature of GRB 130528A and its host galaxy

Author

Jeong, S., primary, Castro-Tirado, A. J., additional, Bremer, M., additional, Winters, J. M., additional, Gorosabel, J., additional, Guziy, S., additional, Pandey, S. B., additional, Jelínek, M., additional, Sánchez-Ramírez, R., additional, Sokolov, Ilya V., additional, Orekhova, N. V., additional, Moskvitin, A. S., additional, Tello, J. C., additional, Cunniffe, R., additional, Lara-Gil, O., additional, Oates, S. R., additional, Pérez-Ramírez, D., additional, Bai, J., additional, Fan, Y., additional, Wang, C., additional, and Park, I. H., additional

Published
2014
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18. Spectroscopy of the short-hard GRB 130603B

Author

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

Published
2014
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19. Prompt emission of GRB 121217A from gamma-rays to the near-infrared

Author

Elliott, J., primary, Yu, H.-F., additional, Schmidl, S., additional, Greiner, J., additional, Gruber, D., additional, Oates, S., additional, Kobayashi, S., additional, Zhang, B., additional, Cummings, J. R., additional, Filgas, R., additional, Gehrels, N., additional, Grupe, D., additional, Kann, D. A., additional, Klose, S., additional, Krühler, T., additional, Nicuesa Guelbenzu, A., additional, Rau, A., additional, Rossi, A., additional, Siegel, M., additional, Schady, P., additional, Sudilovsky, V., additional, Tanga, M., additional, and Varela, K., additional

Published
2014
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22. GRB 091029: at the limit of the fireball scenario

Author

Filgas, R., primary, Greiner, J., additional, Schady, P., additional, de Ugarte Postigo, A., additional, Oates, S. R., additional, Nardini, M., additional, Krühler, T., additional, Panaitescu, A., additional, Kann, D. A., additional, Klose, S., additional, Afonso, P. M. J., additional, Allen, W. H., additional, Castro-Tirado, A. J., additional, Christie, G. W., additional, Dong, S., additional, Elliott, J., additional, Natusch, T., additional, Nicuesa Guelbenzu, A., additional, E., F. Olivares, additional, Rau, A., additional, Rossi, A., additional, Sudilovsky, V., additional, and Yock, P. C. M., additional

Published
2012
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24. The dust extinction curves of gamma-ray burst host galaxies

Author

Schady, P., primary, Dwelly, T., additional, Page, M. J., additional, Krühler, T., additional, Greiner, J., additional, Oates, S. R., additional, De Pasquale, M., additional, Nardini, M., additional, Roming, P. W. A., additional, Rossi, A., additional, and Still, M., additional

Published
2011
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25. Photometric redshifts for gamma-ray burst afterglows from GROND andSwift/UVOT

Author

Krühler, T., primary, Schady, P., additional, Greiner, J., additional, Afonso, P., additional, Bottacini, E., additional, Clemens, C., additional, Filgas, R., additional, Klose, S., additional, Koch, T. S., additional, Küpcü-Yoldaş, A., additional, Oates, S. R., additional, E., F. Olivares, additional, Page, M. J., additional, McBreen, S., additional, Nardini, M., additional, Nicuesa Guelbenzu, A., additional, Rau, A., additional, Roming, P. W. A., additional, Rossi, A., additional, Updike, A., additional, and Yoldaş, A., additional

Published
2011
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26. GRB 060605: multi-wavelength analysis of the first GRB observed using integral field spectroscopy

Author

Ferrero, P., primary, Klose, S., additional, Kann, D. A., additional, Savaglio, S., additional, Schulze, S., additional, Palazzi, E., additional, Maiorano, E., additional, Böhm, P., additional, Grupe, D., additional, Oates, S. R., additional, Sánchez, S. F., additional, Amati, L., additional, Greiner, J., additional, Hjorth, J., additional, Malesani, D., additional, Barthelmy, S. D., additional, Gorosabel, J., additional, Masetti, N., additional, and Roth, M. M., additional

Published
2009
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27. The dark nature of GRB130528A and its host galaxy.

Author

Jeong, S., Castro-Tirado, A. J., Bremer, M., Winters, J. M., Gorosabel, J., Guziy, S., Pandey, S. B., Jelínek, M., Sánchez-Ramírez, R., Sokolov, Ilya V., Orekhova, N. V., Moskvitin, A. S., Tello, J. C., Cunniffe, R., Lara-Gil, O., Oates, S. R., Pérez-Ramírez, D., Bai, J., Fan, Y., and Wang, C.

Subjects
GAMMA ray bursts, ASTRONOMICAL observations, ASTRONOMICAL photometry, DARK matter, ASTRONOMICAL spectroscopy, STELLAR populations
Abstract

Aims. We study the dark nature of GRB130528A through multi-wavelength observations and conclude that the main reason for the optical darkness is local extinction inside of the host galaxy. Methods. Automatic observations were performed at the Burst Optical Observer and Transient Exploring System (BOOTES)-4/MET robotic telescope.We also triggered target of opportunity (ToO) observations at Observatorio de Sierra Nevada (OSN), IRAM Plateau de Bure Interferometer (PdBI) and Gran Telescopio Canarias (GTC + OSIRIS). The host galaxy photometric observations in optical to near-infrared (nIR) wavelengths were achieved through large ground-based aperture telescopes, such as 10.4 m Gran Telescopio Canarias (GTC), 4.2 m William Herschel Telescope (WHT), 6 m Bolshoi Teleskop Alt-azimutalnyi (BTA) telescope, and 2 m Liverpool Telescope (LT). Based on these observations, spectral energy distributions (SED) for the host galaxy and afterglow were constructed. Results. Thanks to millimetre (mm) observations at PdBI, we confirm the presence of a mm source within the XRT error circle that faded over the course of our observations and identify the host galaxy. However, we do not find any credible optical source within early observations with BOOTES-4/MET and 1.5 m OSN telescopes. Spectroscopic observation of this galaxy by GTC showed a single faint emission line that likely corresponds to [OII] 3727 Å at a redshift of 1.250 ± 0.001, implying a star formation rate (M☉ /yr) > 6.18 M☉ /yr without correcting for dust extinction. The probable line-of-sight extinction towards GRB130528A is revealed through analysis of the afterglow SED, resulting in a value of AGRB ≥ 0.9 at the rest frame; this is comparable to extinction levels found among other dark GRBs. The SED of the host galaxy is explained well (χ2/d.o.f. = 0.564) by a luminous (MB = -21.16), low-extinction (AV = 0, rest frame), and aged (2.6 Gyr) stellar population. We can explain this apparent contradiction in global and line-of-sight extinction if the GRB birth place happened to lie in a local dense environment. In light of having relatively small specific star formation rate ∼5.3 M☉ /yr (L=L*)-1, this also could explain the age of the old stellar population of host galaxy. [ABSTRACT FROM AUTHOR]

Published
2014
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28. AN INTRINSIC CORRELATION BETWEEN GRB OPTICAL/UV AFTERGLOW BRIGHTNESS AND DECAY RATE.

Author

Oates, S. R., Page, M. J., De Pasquale, M., Schady, P., Breevel, A. A., Holland, S. T., Kuin, N. P. M., and Marshall, F. E.

Subjects
*LUMINOSITY, *RADIOACTIVE decay, *AFTERGLOW (Physics), *GAMMA rays, *GAMMA ray astronomy
Abstract

We examine 48 Swift/UVOT long Gamma-ray Burst light curves and find a correlation between the logarithmic luminosity at 200 s and average decay rate determined from 200 s onwards, with a Spearman rank coefficient of -0.58 at a significance of 99.998% (4.2σ). We determine the log L200s - α200s correlation to be intrinsic and discuss two possible causes: there is a property of the central engine, outflow or external medium that effects the rate of energy release so that the bright afterglows release their energy more quickly and decay faster than the fainter afterglows; alternatively, the observers viewing angle may produce the correlation, with observers at large viewing angles observing fainter and slower decaying light curves. [ABSTRACT FROM AUTHOR]

Published
2013
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29. VLT and Suzaku observations of the Fermi pulsar PSR J1028-5819.

Author

Mignani, R. P., Razzano, M., Esposito, P., De Luca, A., Marelli, M., Oates, S. R., and Saz-Parkinson, P.

Subjects
FERMI Gamma-ray Space Telescope (Spacecraft), NEUTRON stars, X-rays, PULSARS, ENERGY dissipation, VERY Large Telescope (Chile)
Abstract

Context. The launch of the Fermi Gamma-ray Space Telescope in 2008 opened new perspectives in the multi-wavelength studies of neutron stars, with more than 100 γ-ray pulsars having since been detected. While most Fermi pulsars had previously been observed in the X-rays with Chandra and XMM-Newton, optical observations with 8 m-class telescopes exist for only a tiny fraction of them. Aims. We aim to search for optical emission from the Fermi pulsar PSR J1028 - 5819 (P = 91.4 ms). With a spin-down age τ ~ 90 kyr and a rotational energy loss rate of Ė ~ 8.3 × 1035 erg s-1, PSR J1028 - 5819 can be considered a transition object between the young, Vela-like pulsars and the middle-aged ones. At a distance of ~2.3 kpc and with a relatively low hydrogen column density PSR J1028 - 5819 is a good potential target for 8 m-class telescopes. Methods. Owing to its recent discovery, no optical observations of this pulsar have been reported so far. We used optical images taken with the Very Large Telescope (VLT) in the B and V bands to search for the optical counterpart of PSR J1028 - 5819 or constrain its optical brightness. At the same time, we used an archival Suzaku observation to confirm the preliminary identification of the pulsar's X-ray counterpart obtained by Swift. Results. Owing to the large uncertainty in the pulsar's radio position and the presence of a bright (V = 13.2) early F-type star at ≤ 4″ (star A), we are unable to detect its counterpart down to flux limits of B ~ 25.4 and V ~ 25.3, the deepest obtained so far for PSR J1028 - 5819. From the Suzaku observations, we find that the X-ray spectrum of the pulsar's candidate counterpart is best-fit by a power-law with spectral index γX = 1.7 ± 0.2 and an absorption column density NH < 1021 cm-2, which would support the proposed X-ray identification. Moreover, we find possible evidence of diffuse emission around the pulsar. If real and associated with a pulsar wind nebula (PWN), its surface brightness and angular extent would be compatible with the expectations for a ~100 kyr old pulsar at the distance of PSR J1028 - 5819. Conclusions. A far more accurate radio position for PSR J1028 - 5819 is necessary to better determine its position relative to star A. Future high-spatial resolution observations with both the HST and Chandra will be more able to distinguish the optical emission of PSR J1028 - 5819 from the halo of star A and confirm the existence of the candidate PWN. [ABSTRACT FROM AUTHOR]

Published
2012
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30. The dust extinction curves of gamma-ray burst host galaxies.

Author

Schady, P., Dwelly, T., Page, M. J., Krühler, T., Greiner, J., Oates, S. R., De Pasquale, M., Nardini, M., Roming, P. W. A., Rossi, A., and Still, M.

Subjects
INTERSTELLAR medium, GAMMA ray bursts, GALAXIES, REDSHIFT, STAR formation
Abstract

The composition and amount of interstellar dust within gamma-ray burst (GRB) host galaxies is of key importance when addressing selection effects in the GRB redshift distribution, and when studying the properties of their host galaxies. As well as the implications for GRB research, probing the dust within the high-z hosts of GRBs also contributes to our understanding of the conditions of the interstellar medium and star-formation in the distant Universe. Nevertheless, the physical properties of dust within GRB host galaxies continues to be a highly contended issue. In this paper we explore the mean extinction properties of dust within the host galaxies of a sample of 17 GRBs with total host galaxy visual extinction AV < 1 (> 1), which may be indicative of there being a dependence between dust abundance and the wavelength dependence of dust extinction, as has been previously speculated. [ABSTRACT FROM AUTHOR]

Published
2012
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31. GRB 110715A: MULTIWAVELENGTH STUDY OF THE FIRST GAMMA-RAY BURST OBSERVED WITH ALMA.

Author

Sánchez-Ramírez, R., Hancock, P., Murphy, T., de Ugarte Postigo, A., Gorosabel, J., Kann, D. A., Thöne, C. C., Lundgren, A., Kamble, A., Oates, S. R., Fynbo, J. P. U., de Gregorio Monsalvo, I., Garcia-Appadoo, D., Martín, S., Kuin, N. P. M., Greiner, J., and Castro-Tirado, A. J.

Subjects
AFTERGLOW (Physics), GALAXIES, ULTRAVIOLET radiation, IONIZATION (Atomic physics), SPECTROGRAPHS
Abstract

GRB 110715A had a bright afterglow that was obscured in the optical by a high Galactic extinction. We discovered the submillimeter counterpart with APEX and followed it in radio with ATCA for over 2 months. Additional submm observations were performed with ALMA as a test of the ToO procedures during commissioning, becoming the first GRB afterglow to be detected by the observatory. UV, optical and NIR observations were performed with Swift/UVOT and 2.2 m/GROND in La Silla and X-ray data were obtained by Swift/XRT. The dataset is complemented with spectroscopic data from the VLT/X-shooter spectrograph. The absorption features present in the intermediate resolution optical/nIR spectra reveal a redshift of 0.8224 and a host galaxy environment with low ionization. We fit in the host galaxy absorption features two velocity components separated by 30 km/s, implying a host galaxy with low dynamical activity. [ABSTRACT FROM AUTHOR]

Published
2013
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