182 results on '"Wester, William"'
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2. OzDES Reverberation Mapping Program: Lag recovery reliability for 6-year CIV analysis
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Penton, Andrew, Malik, Umang, Davis, Tamara, Martini, Paul, Yu, Zhefu, Sharp, Rob, Lidman, Christopher, Tucker, Brad E., Hoormann, Janie, Aguena, Michel, Allam, Sahar, Annis, James, Asorey, Jacobo, Bacon, David, Bertin, Emmanuel, Bhargava, Sunayana, Brooks, David, Calcino, Josh, Rosell, Aurelio Carnero, Carollo, Daniela, Kind, Matias Carrasco, Carretero, Jorge, Costanzi, Matteo, da Costa, Luiz, Pereira, Maria Elidaiana da Silva, De Vicente, Juan, Diehl, H. Thomas, Eifler, Tim, Everett, Spencer, Ferrero, Ismael, Fosalba, Pablo, Frieman, Josh, Garcia-Bellido, Juan, Gaztanaga, Enrique, Gerdes, David, Gruen, Daniel, Gruendl, Robert, Gschwend, Julia, Gutierrez, Gaston, Hinton, Samuel, Hollowood, Devon L., Honscheid, Klaus, James, David, Kim, Alex, Kuehn, Kyler, Kuropatkin, Nikolay, Maia, Marcio, Marshall, Jennifer, Menanteau, Felipe, Miquel, Ramon, Möller, Anais, Morgan, Robert, Palmese, Antonella, Paz-Chinchon, Francisco, Malagón, Andrés Plazas, Romer, Kathy, Sanchez, Eusebio, Scarpine, Vic, Scolnic, Daniel, Serrano, Santiago, Smith, Mathew, Suchyta, Eric, Swanson, Molly, Tarle, Gregory, To, Chun-Hao, Uddin, Syed, Varga, Tamas Norbert, Wester, William, and Wilkinson, Reese
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Astrophysics - Astrophysics of Galaxies - Abstract
We present the statistical methods that have been developed to analyse the OzDES reverberation mapping sample. To perform this statistical analysis we have created a suite of customisable simulations that mimic the characteristics of each source in the OzDES sample. These characteristics include: the variability in the photometric and spectroscopic lightcurves, the measurement uncertainties, and the observational cadence. By simulating the sources in the OzDES sample that contain the CIV emission line, we developed a set of criteria that rank the reliability of a recovered time lag depending on the agreement between different recovery methods, the magnitude of the uncertainties, and the rate at which false positives were found in the simulations. These criteria were applied to simulated light curves and these results used to estimate the quality of the resulting Radius-Luminosity relation.We grade the results using three quality levels (gold, silver and bronze). The input slope of the R-L relation was recovered within $1\sigma$ for each of the three quality samples, with the gold standard having the lowest dispersion with a recovered a R-L relation slope of $0.454\pm 0.016$ with an input slope of 0.47. Future work will apply these methods to the entire OzDES sample of 771 AGN., Comment: 16 pages, 15 figures, accepted for publication in NMRAS
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- 2021
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3. Design for the First Narrowband Filter for the Dark Energy Camera: Optimizing the LAGER Survey for z ~ 7 Galaxies
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Zheng, Zhen-Ya, Rhoads, James E., Wang, Junxian, Malhotra, Sangeeta, Walker, Alistair, Mooney, Thomas, Jiang, Chunyan, Hu, Weida, Hibon, Pascale, Jiang, Linhua, Infante, Leopoldo, Barrientos, L. Felipe, Galaz, Gaspar, Valdes, Francisco, Wester, William, Yang, Huan, Coughlin, Alicia, Harish, Santosh, Kang, Wenyong, Khostovan, Ali Ahmad, Kong, Xu, Perez, Lucia A., Pharo, John, Wold, Isak, and Zheng, XianZhong
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
We present the design for the first narrowband filter NB964 for the Dark Energy Camera (DECam), which is operated on the 4m Blanco Telescope at the Cerro Tololo Inter-American Observatory. The NB964 filter profile is essentially defined by maximizing the power of searching for Lyman alpha emitting galaxies (LAEs) in the epoch of reionization, with the consideration of the night sky background in the near-infrared and the DECam quantum efficiency. The NB964 filter was manufactured by Materion in 2015. It has a central wavelength of 964.2 nm and a full width at half maximum (FWHM) of 9.2 nm. An NB964 survey named LAGER (Lyman Alpha Galaxies in the Epoch of Reionization) has been ongoing since December 2015. Here we report results of lab tests, on-site tests and observations with the NB964 filter. The excellent performances of this filter ensure that the LAGER project is able to detect LAEs at z~7 with a high efficiency., Comment: 12 pages, 12 figures, submitted to PASP
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- 2019
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4. Candidate Massive Galaxies at $z \sim 4$ in the Dark Energy Survey
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Guarnieri, Pierandrea, Maraston, Claudia, Thomas, Daniel, Pforr, Janine, Gonzalez-Perez, Violeta, Etherington, James, Carlsen, Joakim, Morice-Atkinson, Xan, Conselice, Christopher J., Gschwend, Julia, Kind, Matias Carrasco, Abbott, Tim, Allam, Sahar, Brooks, David, Burke, David, Rosell, Aurelio Carnero, Carretero, Jorge, Cunha, Carlos, ďAndrea, Chris, da Costa, Luiz, De Vincente, Juan, DePoy, Darren, Diehl, H. Thomas, Doel, Peter, Frieman, Josh, Garcia-Bellido, Juan, Gruen, Daniel, Gutierrez, Gaston, Hanley, Dominic, Hollowood, Devon, Honscheid, Klaus, James, David, Jeltema, Tesla, Kuehn, Kyler, Lima, Marcos, Maia, Marcio A. G., Marshall, Jennifer, Martini, Paul, Melchior, Peter, Menanteau, Felipe, Miquel, Ramon, Malagon, Andres Plazas, Richardson, Samuel, Romer, Kathy, Sanchez, Eusebio, Scarpine, Vic, Schindler, Rafe, Sevilla, Ignacio, Smith, Mathew, Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Tarle, Gregory, Walker, Alistair, and Wester, William
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Astrophysics - Astrophysics of Galaxies - Abstract
Using stellar population models, we predicted that the Dark Energy Survey (DES) - due to its special combination of area (5000 deg. sq.) and depth ($i = 24.3$) - would be in the position to detect massive ($\gtrsim 10^{11}$ M$_{\odot}$) galaxies at $z \sim 4$. We confront those theoretical calculations with the first $\sim 150$ deg. sq. of DES data reaching nominal depth. From a catalogue containing $\sim 5$ million sources, $\sim26000$ were found to have observed-frame $g-r$ vs $r-i$ colours within the locus predicted for $z \sim 4$ massive galaxies. We further removed contamination by stars and artefacts, obtaining 606 galaxies lining up by the model selection box. We obtained their photometric redshifts and physical properties by fitting model templates spanning a wide range of star formation histories, reddening and redshift. Key to constrain the models is the addition, to the optical DES bands $g$, $r$, $i$, $z$, and $Y$, of near-IR $J$, $H$, $K_{s}$ data from the Vista Hemisphere Survey. We further applied several quality cuts to the fitting results, including goodness of fit and a unimodal redshift probability distribution. We finally select 233 candidates whose photometric redshift probability distribution function peaks around $z\sim4$, have high stellar masses ($\log($M$^{*}$/M$_{\odot})\sim 11.7$ for a Salpeter IMF) and ages around 0.1 Gyr, i.e. formation redshift around 5. These properties match those of the progenitors of the most massive galaxies in the local universe. This is an ideal sample for spectroscopic follow-up to select the fraction of galaxies which is truly at high redshift. These initial results and those at the survey completion, which we shall push to higher redshifts, will set unprecedented constraints on galaxy formation, evolution, and the re-ionisation epoch., Comment: 24 pages (41 with appendix), 16 figures, MNRAS in press
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- 2018
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5. Astrometry and Occultation predictions to Trans-Neptunian and Centaur Objects observed within the Dark Energy Survey
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Banda-Huarca, Martin, Camargo, Julio, Desmars, Josselin, Ogando, Ricardo, Vieira-Martins, Roberto, Assafin, Marcelo, da Costa, Luiz, Bernstein, Gary, Kind, Matias Carrasco, Wagner, Alex Drlica, Gomes, Rodney, Gysi, Matheus, Ribas, Felipe Braga, Maia, Marcio, Gerdes, David, Hamilton, Stephanie, Wester, William, Abbot, Tim, Abdalla, Filipe, Allam, Sahar, Avila, Santiago, Bertin, Emmanuel, Brooks, David, Buckley-Geer, Elizabeth, Burke, David, Rossell, Aurelio Carnero, Carretero, Jorge, Cunha, Carlos, Davis, Christopher, de Vicente, Juan, Diehl, Thomas, Doel, Peter, Fosalba, Pablo, Frieman, Josh, Garcia-Bellido, Juan, Gaztanaga, Enrique, Gruen, Daniel, Gruendl, Robert, Gschwend, Julia, Gutierrez, Gaston, Hartley, Will, Hollowood, Devon, Honscheid, Klaus, James, David, Kuehn, Kyler, Kuropatkin, Nikolay, Menanteau, Felipe, Miller, Christopher, Miquel, Ramon, Plazas, Andres, Romer, Kathy, Sanchez, Eusebio, Scarpine, Vic, Schubnell, Michael, Serrano, Santiago, Sevilla, Ignacio, Smith, Mathew, Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Swanson, Molly, and Tarle, Gregory
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Astrophysics - Earth and Planetary Astrophysics - Abstract
Transneptunian objects (TNOs) are a source of invaluable information to access the history and evolution of the outer solar system. However, observing these faint objects is a difficult task. As a consequence, important properties such as size and albedo are known for only a small fraction of them. Now, with the results from deep sky surveys and the Gaia space mission, a new exciting era is within reach as accurate predictions of stellar occultations by numerous distant small solar system bodies become available. From them, diameters with kilometer accuracies can be determined. Albedos, in turn, can be obtained from diameters and absolute magnitudes. We use observations from the Dark Energy Survey (DES) from November 2012 until February 2016, amounting to 4292847 CCD frames. We searched them for all known small solar system bodies and recovered a total of 202 TNOs and Centaurs, 63 of which have been discovered by the DES collaboration until the date of this writing. Their positions were determined using the Gaia Data Release 2 as reference and their orbits were refined. Stellar occultations were then predicted using these refined orbits plus stellar positions from Gaia. These predictions are maintained, and updated, in a dedicated web service. The techniques developed here are also part of an ambitious preparation to use the data from the Large Synoptic Survey Telescope (LSST), that expects to obtain accurate positions and multifilter photometry for tens of thousands of TNOs., Comment: 25 pages, submitted to Astronomical Journal
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- 2018
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6. Discovery of a New Quasar: SDSS J022155.26-064916.6
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Robertson, Jacob M., Tucker, Douglas L., Smith, J. Allyn, Wester, William, Lin, Haun, Mueller, Jack H., and Gulledge, Deborah J.
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Astrophysics - High Energy Astrophysical Phenomena - Abstract
We report the discovery of a new quasar: SDSS J022155.26-064916.6. This object was discovered while reducing spectra of a sample of stars being considered as spectrophotometric standards for the Dark Energy Survey. The flux and wavelength calibrated spectrum is presented with four spectral lines identified. From these lines, the redshift is determined to be z is approximately equal to 0.806. In addition, the rest-frame u-, g-, and r-band luminosity, determined using a k-correction obtained with synthetic photometry of a proxy QSO, are reported as 7.496 $\times 10^{13}$ solar luminosities, 2.049 $\times 10^{13}$ solar luminosities, and $1.896 \times 10^{13}$ solar luminosities, respectively.
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- 2017
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7. US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
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Battaglieri, Marco, Belloni, Alberto, Chou, Aaron, Cushman, Priscilla, Echenard, Bertrand, Essig, Rouven, Estrada, Juan, Feng, Jonathan L., Flaugher, Brenna, Fox, Patrick J., Graham, Peter, Hall, Carter, Harnik, Roni, Hewett, JoAnne, Incandela, Joseph, Izaguirre, Eder, McKinsey, Daniel, Pyle, Matthew, Roe, Natalie, Rybka, Gray, Sikivie, Pierre, Tait, Tim M. P., Toro, Natalia, Van De Water, Richard, Weiner, Neal, Zurek, Kathryn, Adelberger, Eric, Afanasev, Andrei, Alexander, Derbin, Alexander, James, Antochi, Vasile Cristian, Asner, David Mark, Baer, Howard, Banerjee, Dipanwita, Baracchini, Elisabetta, Barbeau, Phillip, Barrow, Joshua, Bastidon, Noemie, Battat, James, Benson, Stephen, Berlin, Asher, Bird, Mark, Blinov, Nikita, Boddy, Kimberly K., Bondi, Mariangela, Bonivento, Walter M., Boulay, Mark, Boyce, James, Brodeur, Maxime, Broussard, Leah, Budnik, Ranny, Bunting, Philip, Caffee, Marc, Caiazza, Sabato Stefano, Campbell, Sheldon, Cao, Tongtong, Carosi, Gianpaolo, Carpinelli, Massimo, Cavoto, Gianluca, Celentano, Andrea, Chang, Jae Hyeok, Chattopadhyay, Swapan, Chavarria, Alvaro, Chen, Chien-Yi, Clark, Kenneth, Clarke, John, Colegrove, Owen, Coleman, Jonathon, Cooke, David, Cooper, Robert, Crisler, Michael, Crivelli, Paolo, D'Eramo, Francesco, D'Urso, Domenico, Dahl, Eric, Dawson, William, De Napoli, Marzio, De Vita, Raffaella, DeNiverville, Patrick, Derenzo, Stephen, Di Crescenzo, Antonia, Di Marco, Emanuele, Dienes, Keith R., Diwan, Milind, Dongwi, Dongwi Handiipondola, Drlica-Wagner, Alex, Ellis, Sebastian, Ezeribe, Anthony Chigbo, Farrar, Glennys, Ferrer, Francesc, Figueroa-Feliciano, Enectali, Filippi, Alessandra, Fiorillo, Giuliana, Fornal, Bartosz, Freyberger, Arne, Frugiuele, Claudia, Galbiati, Cristian, Galon, Iftah, Gardner, Susan, Geraci, Andrew, Gerbier, Gilles, Graham, Mathew, Gschwendtner, Edda, Hearty, Christopher, Heise, Jaret, Henning, Reyco, Hill, Richard J., Hitlin, David, Hochberg, Yonit, Hogan, Jason, Holtrop, Maurik, Hong, Ziqing, Hossbach, Todd, Humensky, T. B., Ilten, Philip, Irwin, Kent, Jaros, John, Johnson, Robert, Jones, Matthew, Kahn, Yonatan, Kalantarians, Narbe, Kaplinghat, Manoj, Khatiwada, Rakshya, Knapen, Simon, Kohl, Michael, Kouvaris, Chris, Kozaczuk, Jonathan, Krnjaic, Gordan, Kubarovsky, Valery, Kuflik, Eric, Kusenko, Alexander, Lang, Rafael, Leach, Kyle, Lin, Tongyan, Lisanti, Mariangela, Liu, Jing, Liu, Kun, Liu, Ming, Loomba, Dinesh, Lykken, Joseph, Mack, Katherine, Mans, Jeremiah, Maris, Humphrey, Markiewicz, Thomas, Marsicano, Luca, Martoff, C. J., Mazzitelli, Giovanni, McCabe, Christopher, McDermott, Samuel D., McDonald, Art, McKinnon, Bryan, Mei, Dongming, Melia, Tom, Miller, Gerald A., Miuchi, Kentaro, Nazeer, Sahara Mohammed Prem, Moreno, Omar, Morozov, Vasiliy, Mouton, Frederic, Mueller, Holger, Murphy, Alexander, Neilson, Russell, Nelson, Tim, Neu, Christopher, Nosochkov, Yuri, O'Hare, Ciaran, Oblath, Noah, Orrell, John, Ouellet, Jonathan, Pastore, Saori, Paul, Sebouh, Perelstein, Maxim, Peter, Annika, Phan, Nguyen, Phinney, Nan, Pivovaroff, Michael, Pocar, Andrea, Pospelov, Maxim, Pradler, Josef, Privitera, Paolo, Profumo, Stefano, Raggi, Mauro, Rajendran, Surjeet, Randazzo, Nunzio, Raubenheimer, Tor, Regenfus, Christian, Renshaw, Andrew, Ritz, Adam, Rizzo, Thomas, Rosenberg, Leslie, Rubbia, Andre, Rybolt, Ben, Saab, Tarek, Safdi, Benjamin R., Santopinto, Elena, Scarff, Andrew, Schneider, Michael, Schuster, Philip, Seidel, George, Sekiya, Hiroyuki, Seong, Ilsoo, Simi, Gabriele, Sipala, Valeria, Slatyer, Tracy, Slone, Oren, Smith, Peter F, Smolinsky, Jordan, Snowden-Ifft, Daniel, Solt, Matthew, Sonnenschein, Andrew, Sorensen, Peter, Spooner, Neil, Srivastava, Brijesh, Stancu, Ion, Strigari, Louis, Strube, Jan, Sushkov, Alexander O., Szydagis, Matthew, Tanedo, Philip, Tanner, David, Tayloe, Rex, Terrano, William, Thaler, Jesse, Thomas, Brooks, Thorpe, Brianna, Thorpe, Thomas, Tiffenberg, Javier, Tran, Nhan, Trovato, Marco, Tully, Christopher, Tyson, Tony, Vachaspati, Tanmay, Vahsen, Sven, van Bibber, Karl, Vandenbroucke, Justin, Villano, Anthony, Volansky, Tomer, Wang, Guojian, Ward, Thomas, Wester, William, Whitbeck, Andrew, Williams, David A., Wing, Matthew, Winslow, Lindley, Wojtsekhowski, Bogdan, Yu, Hai-Bo, Yu, Shin-Shan, Yu, Tien-Tien, Zhang, Xilin, Zhao, Yue, and Zhong, Yi-Ming
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,High Energy Physics - Experiment - Abstract
This white paper summarizes the workshop "U.S. Cosmic Visions: New Ideas in Dark Matter" held at University of Maryland on March 23-25, 2017., Comment: 102 pages + references
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- 2017
8. Extreme variability quasars from the Sloan Digital Sky Survey and the Dark Energy Survey
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Rumbaugh, Nick, Shen, Yue, Morganson, Eric, Liu, Xin, Banerji, Manda, McMahon, Richard G., Abdalla, Filipe, Benoit-Levy, Aurelien, Bertin, Emmanuel, Brooks, David, Buckley-Geer, Elizabeth, Capozzi, Diego, Rosell, Aurelio Carnero, Kind, M. Carrasco, Carretero, Jorge, Cunha, Carlos, D'Andrea, Chris, da Costa, Luiz, DePoy, Darren, Desai, Shantanu, Doel, Peter, Frieman, Joshua, Garcia-Bellido, Juan, Gruen, Daniel, Gruendl, Robert, Gschwend, Julia, Gutierrez, Gaston, Honscheid, Klaus, James, David, Kuehn, Kyler, Kuhlmann, Steve, Kuropatkin, Nikolay, Lima, Marcos, Maia, Marcio, Marshall, Jennifer, Martini, Paul, Menanteau, Felipe, Malagon, Andres Plazas, Reil, Kevin, Roodman, Aaron, Sanchez, Eusebio, Scarpine, Vic, Schindler, Rafe, Schubnell, Michael, Sheldon, Erin, Smith, Mathew, Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Swanson, Molly, Walker, Alistair, and Wester, William
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We perform a systematic search for long-term extreme variability quasars (EVQs) in the overlapping Sloan Digital Sky Survey (SDSS) and 3-Year Dark Energy Survey (DES) imaging, which provide light curves spanning more than 15 years. We identified ~1000 EVQs with a maximum g band magnitude change of more than 1 mag over this period, about 10% of all quasars searched. The EVQs have L_bol~10^45-10^47 erg/s and L/L_Edd~0.01-1. Accounting for selection effects, we estimate an intrinsic EVQ fraction of ~30-50% among all g<~22 quasars over a baseline of ~15 years. These EVQs are good candidates for so-called "changing-look quasars", where a spectral transition between the two types of quasars (broad-line and narrow-line) is observed between the dim and bright states. We performed detailed multi-wavelength, spectral and variability analyses for the EVQs and compared to their parent quasar sample. We found that EVQs are distinct from a control sample of quasars matched in redshift and optical luminosity: (1) their UV broad emission lines have larger equivalent widths; (2) their Eddington ratios are systematically lower; and (3) they are more variable on all timescales. The intrinsic difference in quasar properties for EVQs suggest that internal processes associated with accretion are the main driver for the observed extreme long-term variability. However, despite their different properties, EVQs seem to be in the tail of a continuous distribution of quasar properties, rather than standing out as a distinct population. We speculate that EVQs are normal quasars accreting at relatively low accretion rates, where the accretion flow is more likely to experience instabilities that drive the factor of few changes in flux on multi-year timescales., Comment: submitted to ApJ; comments welcome
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- 2017
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9. Discovery and Physical Characterization of a Large Scattered Disk Object at 92 AU
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Gerdes, David, Sako, Masao, Hamilton, Stephanie, Zhang, Ke, Khain, Tali, Becker, Juliette, Annis, James, Wester, William, Bernstein, Gary, Scheibner, Colin, Zullo, Lynus, Adams, Fred, Bergin, Edwin, Walker, Alistair, Mueller, J. H., Abbott, T., Abdalla, Filipe, Allam, Sahar, Bechtol, K., Benoit-Lévy, Aurelien, Bertin, Emmanuel, Brooks, David, Burke, David, Rosell, A., Kind, M., Carretero, Jorge, Cunha, Carlos, da Costa, Luiz, Desai, S., Diehl, H. Thomas, Eifler, Tim, Flaugher, Brenna, Frieman, Joshua, Garc'ia-Bellido, J., Gaztanaga, Enrique, Goldstein, Daniel, Gruen, Daniel, Gschwend, J., Gutierrez, Gaston, Honscheid, Klaus, James, D., Kent, Stephen M., Krause, E., Kuehn, Kyler, Kuropatkin, Nikolay, Lahav, O., Li, T., Maia, M., March, Marisa Cristina, Marshall, Jennifer, Martini, P., Menanteau, Felipe, Miquel, Ramon, Nichol, Robert, Malagón, Andres Plazas, Romer, A. Kathy, Roodman, Aaron, Sanchez, Eusebio, Sevilla-Noarbe, Ignacio, Smith, Mathew, Smith, R., Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, E., Swanson, M., Tarle, Gregory, Tucker, Douglas, and Zhang, Y.
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Astrophysics - Earth and Planetary Astrophysics - Abstract
We report the observation and physical characterization of the possible dwarf planet \UZ\ ("DeeDee"), a dynamically detached trans-Neptunian object discovered at 92 AU. This object is currently the second-most distant known trans-Neptunian object with reported orbital elements, surpassed in distance only by the dwarf planet Eris. The object was discovered with an $r$-band magnitude of 23.0 in data collected by the Dark Energy Survey between 2014 and 2016. Its 1140-year orbit has $(a,e,i) = (109~\mathrm{AU}, 0.65, 26.8^{\circ})$. It will reach its perihelion distance of 38 AU in the year 2142. Integrations of its orbit show it to be dynamically stable on Gyr timescales, with only weak interactions with Neptune. We have performed followup observations with ALMA, using 3 hours of on-source integration time to measure the object's thermal emission in the Rayleigh-Jeans tail. The signal is detected at 7$\sigma$ significance, from which we determine a $V$-band albedo of $13.1^{+3.3}_{-2.4}\mathrm{(stat)}^{+2.0}_{-1.4}\mathrm{(sys)}$ percent and a diameter of $635^{+57}_{-61}\mathrm{(stat)}^{+32}_{-39}\mathrm{(sys)}$~km, assuming a spherical body with uniform surface properties., Comment: 13 pages, 4 figures, accepted by ApJ Letters
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- 2017
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10. Host Galaxy Identification for Supernova Surveys
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Gupta, Ravi R., Kuhlmann, Steve, Kovacs, Eve, Spinka, Harold, Kessler, Richard, Goldstein, Daniel A., Liotine, Camille, Pomian, Katarzyna, D'Andrea, Chris B., Sullivan, Mark, Carretero, Jorge, Castander, Francisco J., Nichol, Robert C., Finley, David A., Fischer, John A., Foley, Ryan J., Kim, Alex G., Papadopoulos, Andreas, Sako, Masao, Scolnic, Daniel M., Smith, Mathew, Tucker, Brad E., Uddin, Syed, Wolf, Rachel C., Yuan, Fang, Abbott, Tim M. C., Abdalla, Filipe B., Benoit-Levy, Aurelien, Bertin, Emmanuel, Brooks, David, Rosell, Aurelio Carnero, Kind, Matias Carrasco, Cunha, Carlos E., da Costa, Luiz N., Desai, Shantanu, Doel, Peter, Eifler, Tim F., Evrard, August E., Flaugher, Brenna, Fosalba, Pablo, Gaztanaga, Enrique, Gruen, Daniel, Gruendl, Robert, James, David J., Kuehn, Kyler, Kuropatkin, Nikolay, Maia, Marcio A. G., Marshall, Jennifer L., Miquel, Ramon, Plazas, Andres A., Romer, A. Kathy, Sanchez, Eusebio, Schubnell, Michael, Sevilla-Noarbe, Ignacio, Sobreira, Flavia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Walker, Alistair R., and Wester, William
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Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
Host galaxy identification is a crucial step for modern supernova (SN) surveys such as the Dark Energy Survey (DES) and the Large Synoptic Survey Telescope (LSST), which will discover SNe by the thousands. Spectroscopic resources are limited, so in the absence of real-time SN spectra these surveys must rely on host galaxy spectra to obtain accurate redshifts for the Hubble diagram and to improve photometric classification of SNe. In addition, SN luminosities are known to correlate with host-galaxy properties. Therefore, reliable identification of host galaxies is essential for cosmology and SN science. We simulate SN events and their locations within their host galaxies to develop and test methods for matching SNe to their hosts. We use both real and simulated galaxy catalog data from the Advanced Camera for Surveys General Catalog and MICECATv2.0, respectively. We also incorporate "hostless" SNe residing in undetected faint hosts into our analysis, with an assumed hostless rate of 5%. Our fully automated algorithm is run on catalog data and matches SNe to their hosts with 91% accuracy. We find that including a machine learning component, run after the initial matching algorithm, improves the accuracy (purity) of the matching to 97% with a 2% cost in efficiency (true positive rate). Although the exact results are dependent on the details of the survey and the galaxy catalogs used, the method of identifying host galaxies we outline here can be applied to any transient survey., Comment: 22 pages, 18 figures; Accepted by AJ, revised to incorporate referee comments
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- 2016
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11. Discovery of a New Blue Quasar: SDSS J022218.03-062511.1
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Fix, Mees B., Smith, J. Allyn, Tucker, Douglas L., Wester, William, and Annis, James
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Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Astrophysics of Galaxies - Abstract
We report the discovery of a bright blue quasar: SDSS J022218.03-062511.1. This object was discovered spectroscopically while searching for hot white dwarfs that may be used as calibration sources for large sky surveys such as the Dark Energy Survey or the Large Synoptic Survey Telescope project. We present the calibrated spectrum, spectral line shifts and report a redshift of z = 0.521 +/- 0.0015 and a rest-frame g-band luminosity of 8.71 X 10^11 L(Sun)., Comment: 5 pages, 5 figures, Accepted for Astron. Nachr
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- 2015
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12. High Resolution Data Analysis: Plans and Prospects
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Jois, Shriram, Duffy, Leanne, Sullivan, Neil, Tanner, David, Wester, William, Carosi, Gianpaolo, editor, and Rybka, Gray, editor
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- 2020
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13. HOST GALAXY IDENTIFICATION FOR SUPERNOVA SURVEYS
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Gupta, Ravi R, Kuhlmann, Steve, Kovacs, Eve, Spinka, Harold, Kessler, Richard, Goldstein, Daniel A, Liotine, Camille, Pomian, Katarzyna, D’Andrea, Chris B, Sullivan, Mark, Carretero, Jorge, Castander, Francisco J, Nichol, Robert C, Finley, David A, Fischer, John A, Foley, Ryan J, Kim, Alex G, Papadopoulos, Andreas, Sako, Masao, Scolnic, Daniel M, Smith, Mathew, Tucker, Brad E, Uddin, Syed, Wolf, Rachel C, Yuan, Fang, Abbott, Tim MC, Abdalla, Filipe B, Benoit-Lévy, Aurélien, Bertin, Emmanuel, Brooks, David, Rosell, Aurelio Carnero, Kind, Matias Carrasco, Cunha, Carlos E, da Costa, Luiz N, Desai, Shantanu, Doel, Peter, Eifler, Tim F, Evrard, August E, Flaugher, Brenna, Fosalba, Pablo, Gaztañaga, Enrique, Gruen, Daniel, Gruendl, Robert, James, David J, Kuehn, Kyler, Kuropatkin, Nikolay, Maia, Marcio AG, Marshall, Jennifer L, Miquel, Ramon, Plazas, Andrés A, Romer, A Kathy, Sánchez, Eusebio, Schubnell, Michael, Sevilla-Noarbe, Ignacio, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly EC, Tarle, Gregory, Walker, Alistair R, and Wester, William
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Particle and High Energy Physics ,Astronomical Sciences ,Physical Sciences ,catalogs ,galaxies: general ,supernovae: general ,surveys ,Astronomical and Space Sciences ,Astronomy & Astrophysics ,Astronomical sciences ,Particle and high energy physics - Abstract
Host galaxy identification is a crucial step for modern supernova (SN) surveys such as the Dark Energy Survey and the Large Synoptic Survey Telescope, which will discover SNe by the thousands. Spectroscopic resources are limited, and so in the absence of real-time SN spectra these surveys must rely on host galaxy spectra to obtain accurate redshifts for the Hubble diagram and to improve photometric classification of SNe. In addition, SN luminosities are known to correlate with host-galaxy properties. Therefore, reliable identification of host galaxies is essential for cosmology and SN science. We simulate SN events and their locations within their host galaxies to develop and test methods for matching SNe to their hosts. We use both real and simulated galaxy catalog data from the Advanced Camera for Surveys General Catalog and MICECATv2.0, respectively. We also incorporate "hostless" SNe residing in undetected faint hosts into our analysis, with an assumed hostless rate of 5%. Our fully automated algorithm is run on catalog data and matches SNe to their hosts with 91% accuracy. We find that including a machine learning component, run after the initial matching algorithm, improves the accuracy (purity) of the matching to 97% with a 2% cost in efficiency (true positive rate). Although the exact results are dependent on the details of the survey and the galaxy catalogs used, the method of identifying host galaxies we outline here can be applied to any transient survey.
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- 2016
14. A Rich Tapestry: Supersymmetric Axions, Dark Radiation, and Inflationary Reheating
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Queiroz, Farinaldo S., Sinha, Kuver, and Wester, William
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High Energy Physics - Phenomenology ,Astrophysics - Cosmology and Nongalactic Astrophysics ,High Energy Physics - Theory - Abstract
We exploit the complementarity among supersymmetry, inflation, axions, Big Bang Nucleosynthesis (BBN) and Cosmic Microwave Background Radiation (CMB) to constrain supersymmetric axion models in the light of the recent Planck and BICEP results. In particular, we derive BBN bounds coming from altering the light element abundances by taking into account hadronic and electromagnetic energy injection, and CMB constraints from black-body spectrum distortion. Lastly, we outline the viable versus excluded region of these supersymetric models that might account for the mild dark radiation observed., Comment: 8 pages, 2 figures. To appear in Phys. Rev. D
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- 2014
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15. Design for the First Narrowband Filter for the Dark Energy Camera : Optimizing the LAGER Survey for z ∼ 7 Galaxies
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Zheng, Zhen-Ya, Rhoads, James E., Wang, Jun-Xian, Malhotra, Sangeeta, Walker, Alistair, Mooney, Thomas, Jiang, Chunyan, Hu, Weida, Hibon, Pascale, Jiang, Linhua, Infante, Leopoldo, Barrientos, L. Felipe, Galaz, Gaspar, Valdes, Francisco, Wester, William, Yang, Huan, Coughlin, Alicia, Harish, Santosh, Kang, Wenyong, Khostovan, Ali Ahmad, Kong, Xu, Perez, Lucia A., Pharo, John, Wold, Isak, and Zheng, XianZhong
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- 2019
16. Measuring the flatness of focal plane for very large mosaic CCD camera
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Hao, Jiangang, Estrada, Juan, Cease, Herman, Diehl, H. Thomas, Flaugher, Brenna L., Kubik, Donna, Kuk, Keivin, Kuropatkine, Nickolai, Lin, Huan, Montes, Jorge, Scarpine, Vic, Schultz, Ken, and Wester, William
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Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Large mosaic multiCCD camera is the key instrument for modern digital sky survey. DECam is an extremely red sensitive 520 Megapixel camera designed for the incoming Dark Energy Survey (DES). It is consist of sixty two 4k$\times$2k and twelve 2k x 2k 250-micron thick fully-depleted CCDs, with a focal plane of 44 cm in diameter and a field of view of 2.2 square degree. It will be attached to the Blanco 4-meter telescope at CTIO. The DES will cover 5000 square-degrees of the southern galactic cap in 5 color bands (g, r, i, z, Y) in 5 years starting from 2011. To achieve the science goal of constraining the Dark Energy evolution, stringent requirements are laid down for the design of DECam. Among them, the flatness of the focal plane needs to be controlled within a 60-micron envelope in order to achieve the specified PSF variation limit. It is very challenging to measure the flatness of the focal plane to such precision when it is placed in a high vacuum dewar at 173 K. We developed two image based techniques to measure the flatness of the focal plane. By imaging a regular grid of dots on the focal plane, the CCD offset along the optical axis is converted to the variation the grid spacings at different positions on the focal plane. After extracting the patterns and comparing the change in spacings, we can measure the flatness to high precision. In method 1, the regular dots are kept in high sub micron precision and cover the whole focal plane. In method 2, no high precision for the grid is required. Instead, we use a precise XY stage moves the pattern across the whole focal plane and comparing the variations of the spacing when it is imaged by different CCDs. Simulation and real measurements show that the two methods work very well for our purpose, and are in good agreement with the direct optical measurements., Comment: Presented at SPIE Conference,Ground-based and Airborne Instrumentation for Astronomy III, San Diego, 2010
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- 2010
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17. Laboratory constraints on chameleon dark energy and power-law fields
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Steffen, Jason H., Upadhye, Amol, Baumbaugh, Al, Chou, Aaron S., Mazur, Peter O., Tomlin, Ray, Weltman, Amanda, and Wester, William
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Astrophysics - Cosmology and Extragalactic Astrophysics ,General Relativity and Quantum Cosmology ,High Energy Physics - Experiment ,High Energy Physics - Phenomenology - Abstract
We report results from the GammeV Chameleon Afterglow Search---a search for chameleon particles created via photon/chameleon oscillations within a magnetic field. This experiment is sensitive to a wide class of chameleon power-law models and dark energy models not previously explored. These results exclude five orders of magnitude in the coupling of chameleons to photons covering a range of four orders of magnitude in chameleon effective mass and, for individual chameleon models, exclude between 4 and 12 orders of magnitude in chameleon couplings to matter., Comment: 5 pages, Submission to PRL
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- 2010
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18. High Resolution Data Analysis: Plans and Prospects
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Jois, Shriram, primary, Duffy, Leanne, additional, Sullivan, Neil, additional, Tanner, David, additional, and Wester, William, additional
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- 2020
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19. Effect of anti-retroviral regimen on proximal tubular function in Zambian adolescents and young adults living with HIV: A cross sectional study
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Mweemba, Aggrey, primary, Kelly, Paul, additional, Heimburger, Douglas C., additional, Mutale, Wilbroad, additional, Nzala, Selestine, additional, Wester, William C, additional, Banda, Justor, additional, Mulenga, Lloyd, additional, Siwingwa, Mpanji, additional, and Todd, Jim, additional
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- 2023
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20. Building Physician-Scientist Skills in R Programming: A Short Workshop Report
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Aliyu, Muktar H., primary, Sani, Mahmoud, additional, Ingles, Donna, additional, Tsiga-Ahmed, Fatima, additional, Musa, Baba, additional, Dongarwar, Deepa, additional, Salihu, Hamisu, additional, and Wester, William, additional
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- 2022
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21. Measurement of the charge asymmetry of electrons from the decays of $W$ bosons produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
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Aaltonen, Timo Antero, Amerio, Silvia, Amidei, Dante E, Anastassov, Anton Iankov, Annovi, Alberto, Antos, Jaroslav, Apollinari, Giorgio, Appel, Jeffrey A, Arisawa, Tetsuo, Artikov, Akram Muzafarovich, Asaadi, Jonathan A, Ashmanskas, William Joseph, Auerbach, Benjamin, Aurisano, Adam J, Azfar, Farrukh A, Badgett, William Farris, Bae, Taegil, Barbaro-Galtieri, Angela, Barnes, Virgil E, Barnett, Bruce Arnold, Barria, Patrizia, Bartos, Pavol, Bauce, Matteo, Bedeschi, Franco, Behari, Satyajit, Bellettini, Giorgio, Bellinger, James Nugent, Benjamin, Douglas P, Beretvas, Andrew F, Bhatti, Anwar Ahmad, Bland, Karen Renee, Blumenfeld, Barry J, Bocci, Andrea, Bodek, Arie, Bortoletto, Daniela, Boudreau, Joseph Francis, Boveia, Antonio, Brigliadori, Luca, Bromberg, Carl Michael, Brucken, Erik, Budagov, J., Budagov, Ioulian A, Budd, Howard Scott, Burkett, Kevin Alan, Busetto, Giovanni, Bussey, Peter John, Butti, Pierfrancesco, Buzatu, Adrian, Calamba, Aristotle, Camarda, Stefano, Campanelli, Mario, Canelli, Florencia, Carls, Benjamin, Carlsmith, Duncan L, Carosi, Roberto, Carrillo Moreno, Salvador, Casal Larana, Bruno, Casarsa, Massimo, Castro, Andrea, Catastini, Pierluigi, Cauz, Diego, Cavaliere, Viviana, Cerri, Alessandro, Cerrito, Lucio, Chen, Yen-Chu, Chertok, Maxwell Benjamin, Chiarelli, Giorgio, Chlachidze, Gouram, Cho, Kihyeon, Chokheli, Davit, Clark, Allan Geoffrey, Clarke, Christopher Joseph, Convery, Mary Elizabeth, Conway, John Stephen, Corbo, Matteo, Cordelli, Marco, Cox, Charles Alexander, Cox, David Jeremy, Cremonesi, Matteo, Cruz Alonso, Daniel, Cuevas Maestro, Javier, Culbertson, Raymond Lloyd, D'Ascenzo, Nicola, Datta, Mousumi, de Barbaro, Pawel, Demortier, Luc M, Deninno, Maria Maddalena, D'Errico, Maria, Devoto, Francesco, Di Canto, Angelo, Di Ruzza, Benedetto, Dittmann, Jay Richard, Donati, Simone, D'Onofrio, Monica, Dorigo, Mirco, Driutti, Anna, Ebina, Koji, Edgar, Ryan Christopher, Elagin, Andrey Lvovich, Erbacher, Robin D, Errede, Steven Michael, Esham, Benjamin, Farrington, Sinead Marie, Fernández Ramos, Juan Pablo, Field, Richard D, Flanagan, Gene U, Forrest, Robert David, Franklin, Melissa EB, Freeman, John Christian, Frisch, Henry J, Funakoshi, Yujiro, Galloni, Camilla, Garfinkel, Arthur F, Garosi, Paola, Gerberich, Heather Kay, Gerchtein, Elena A, Giagu, Stefano, Giakoumopoulou, Viktoria Athina, Gibson, Karen Ruth, Ginsburg, Camille Marie, Giokaris, Nikos D, Giromini, Paolo, Glagolev, Vladimir, Glenzinski, Douglas Andrew, Gold, Michael S, Goldin, Daniel, Golossanov, Alexander, Gomez, Gervasio, Gomez-Ceballos, Guillelmo, Goncharov, Maxim T, González López, Oscar, Gorelov, Igor V, Goshaw, Alfred T, Goulianos, Konstantin A, Gramellini, Elena, Grosso-Pilcher, Carla, Guimaraes da Costa, Joao, Hahn, Stephen R, Han, Ji-Yeon, Happacher, Fabio, Hara, Kazuhiko, Hare, Matthew Frederick, Harr, Robert Francis, Harrington-Taber, Timothy, Hatakeyama, Kenichi, Hays, Christopher Paul, Heinrich, Joel G, Herndon, Matthew Fairbanks, Hocker, James Andrew, Hong, Ziqing, Hopkins, Walter Howard, Hou, Suen Ray, Hughes, Richard Edward, Husemann, Ulrich, Hussein, Mohammad, Huston, Joey Walter, Introzzi, Gianluca, Iori, Maurizio, Isgrò, Andrea, Ivanov, Andrew Gennadievich, James, Eric B, Jang, Dongwook, Jayatilaka, Bodhitha Anjalike, Jeon, Eun-Ju, Jindariani, Sergo Robert, Jones, Matthew T, Joo, Kyung Kwang, Jun, Soon Yung, Junk, Thomas R, Kambeitz, Manuel, Kamon, Teruki, Karchin, Paul Edmund, Kasmi, Azeddine, Kato, Yukihiro, Ketchum, Wesley Robert, Keung, Justin Kien, Kilminster, Benjamin John, Kim, DongHee, Kim, Hyunsoo, Kim, Jieun, Kim, Min Jeong, Kim, Shin-Hong, Kim, Soo Bong, Kim, Young-Jin, Kim, Young-Kee, Kimura, Naoki, Kirby, Michael H, Kondo, Kunitaka, Kong, Dae Jung, Konigsberg, Jacobo, Kotwal, Ashutosh Vijay, Kreps, Michal, Kroll, J., Kroll, IJoseph, Kruse, Mark Charles, Kuhr, Thomas, Kurata, Masakazu, Laasanen, Alvin Toivo, Lammel, Stephan, Lancaster, Mark, Lannon, Kevin Patrick, Latino, Giuseppe, Lee, Hyun Su, Lee, Jaison, Leo, Sabato, Leone, Sandra, Lewis, Jonathan D, Limosani, Antonio, Lipeles, Elliot David, Lister, Alison, Liu, Qiuguang, Liu, Tiehui Ted, Lockwitz, Sarah E, Loginov, Andrey Borisovich, Lucchesi, Donatella, Lucà, Alessandra, Lueck, Jan, Lujan, Paul Joseph, Lukens, Patrick Thomas, Lungu, Gheorghe, Lys, Jeremy E, Lysak, Roman, Madrak, Robyn Leigh, Maestro, Paolo, Malik, Sarah Alam, Manca, Giulia, Manousakis-Katsikakis, Arkadios, Marchese, Luigi, Margaroli, Fabrizio, Marino, Christopher Phillip, Matera, Keith, Mattson, Mark Edward, Mazzacane, Anna, Mazzanti, Paolo, McNulty, Ronan, Mehta, Andrew, Mehtala, Petteri, Mesropian, Christina, Miao, Ting, Michielin, Emanuele, Mietlicki, David John, Mitra, Ankush, Miyake, Hideki, Moed, Shulamit, Moggi, Niccolo, Moon, Chang-Seong, Moore, Ronald Scott, Morello, Michael Joseph, Mukherjee, Aseet, Muller, Thomas, Muller, Th., Murat, Pavel A, Mussini, Manuel, Nachtman, Jane Marie, Nagai, Yoshikazu, Naganoma, Junji, Nakano, Itsuo, Napier, Austin, Nett, Jason Michael, Nigmanov, Turgun S, Nodulman, Lawrence J, Noh, Seoyoung, Norniella Francisco, Olga, Oakes, Louise Beth, Oh, Seog Hwan, Oh, Young-do, Okusawa, Toru, Orava, Risto Olavi, Ortolan, Lorenzo, Pagliarone, Carmine Elvezio, Palencia, Jose Enrique, Palni, Prabhakar, Papadimitriou, Vaia, Parker, William Chesluk, Pauletta, Giovanni, Paulini, Manfred, Paus, Christoph Maria Ernst, Phillips, Thomas J, Piacentino, Giovanni M, Pianori, Elisabetta, Pilot, Justin Robert, Pitts, Kevin T, Plager, Charles, Pondrom, Lee G, Poprocki, Stephen, Potamianos, Karolos Jozef, Pranko, Aliaksandr Pavlovich, Prokoshin, Fedor, Ptohos, Fotios K, Punzi, Giovanni, Redondo Fernández, Ignacio, Renton, Peter B, Rescigno, Marco, Rimondi, Franco, Ristori, Luciano, Robson, Aidan, Rodriguez, Tatiana Isabel, Rolli, Simona, Ronzani, Manfredi, Roser, Robert Martin, Rosner, Jonathan L, Ruffini, Fabrizio, Ruiz Jimeno, Alberto, Russ, James S, Rusu, Vadim Liviu, Sakumoto, Willis Kazuo, Sakurai, Yuki, Santi, Lorenzo, Sato, Koji, Saveliev, Valeri, Savoy-Navarro, Aurore, Schlabach, Philip, Schmidt, Eugene E, Schwarz, Thomas A, Scodellaro, Luca, Scuri, Fabrizio, Seidel, Sally C, Seiya, Yoshihiro, Semenov, Alexei, Sforza, Federico, Shalhout, Shalhout Zaki, Shears, Tara G, Shepard, Paul F, Shimojima, Makoto, Shochet, Melvyn J, Shreyber-Tecker, Irina, Simonenko, Alexander V, Sliwa, Krzysztof Jan, Smith, John Rodgers, Snider, Frederick Douglas, Song, Hao, Sorin, Maria Veronica, St Denis, Richard Dante, Stancari, Michelle Dawn, Stentz, Dale James, Strologas, John, Sudo, Yuji, Sukhanov, Alexander I, Suslov, Igor M, Takemasa, Ken-ichi, Takeuchi, Yuji, Tang, Jian, Tecchio, Monica, Teng, Ping-Kun, Thom, Julia, Thomson, Evelyn Jean, Thukral, Vaikunth, Toback, David A, Tokar, Stanislav, Tollefson, Kirsten Anne, Tomura, Tomonobu, Tonelli, Diego, Torre, Stefano, Torretta, Donatella, Totaro, Pierluigi, Trovato, Marco, Ukegawa, Fumihiko, Uozumi, Satoru, Vellidis, Konstantinos, Vázquez-Valencia, Elsa Fabiola, Vecchio, Valentina, Velev, Gueorgui, Vellidis, C., Vernieri, Caterina, Vidal Marono, Miguel, Vilar Cortabitarte, Rocio, Vizán Garcia, Jesus Manuel, Vogel, Marcelo, Volpi, Guido, Wagner, Peter, Wallny, Rainer S, Wang, Song-Ming, Waters, David S, Wester, William Carl, Whiteson, Daniel O, Wicklund, Arthur Barry, Wilbur, Scott, Williams, Hugh H, Wilson, Jonathan Samuel, Wilson, Peter James, Winer, Brian L, Wittich, Peter, Wolbers, Stephen A, Wolfmeister, Homer, Wright, Thomas Roland, Wu, Xin, Wu, Zhenbin, Yamamoto, Kazuhiro, Yamato, Daisuke, Yang, Tingjun, Yang, Un-Ki, Yang, Yu Chul, Yao, Wei-Ming, Yeh, Gong Ping, Yi, Kai, Yoh, John, Yorita, Kohei, Yoshida, Takuo, Yu, Geum Bong, Yu, Intae, Zanetti, Anna Maria, Zeng, Yu, Zhou, Chen, and Zucchelli, Stefano
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High Energy Physics - Experiment (hep-ex) ,hep-ex ,High Energy Physics::Phenomenology ,Physics::Accelerator Physics ,FOS: Physical sciences ,High Energy Physics::Experiment ,Nuclear Experiment ,Computer Science::Digital Libraries ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
At the Fermilab Tevatron proton-antiproton ($p\bar{p}$) collider, high-mass electron-neutrino ($e\nu$) pairs are produced predominantly in the process $p \bar{p} \rightarrow W(\rightarrow e\nu) + X$. The asymmetry of the electron and positron yield as a function of their pseudorapidity constrain the slope of the ratio of the $u$- to $d$-quark parton distributions versus the fraction of the proton momentum carried by the quarks. This paper reports on the measurement of the electron-charge asymmetry using the full data set recorded by the Collider Detector at Fermilab in 2001--2011 and corresponding to 9.1~fb$^{-1}$ of integrated luminosity. The measurement significantly improves the precision of the Tevatron constraints on the parton-distribution functions of the proton. Numerical tables of the measurement are provided., Comment: 27 pages, 25 figures. To be published in PRD
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- 2021
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22. Prognostic model for nephrotoxicity among HIV-positive Zambian adults receiving tenofovir disoproxil fumarate-based antiretroviral therapy
- Author
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Chabala, Freeman W., primary, Siew, Edward D., additional, Mutale, Wilbroad, additional, Mulenga, Lloyd, additional, Mweemba, Aggrey, additional, Goma, Fastone, additional, Banda, Njeleka, additional, Kaonga, Patrick, additional, Wester, William C., additional, Heimburger, Douglas C., additional, Aliyu, Muktar H., additional, and Munkombwe, Derick, additional
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- 2021
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23. [formula omitted] at the Tevatron
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Wester, William
- Published
- 2006
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24. Problems in the Therapy for Imported Malaria in the United States
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Singh, Kamaljit, Wester, William C., and Trenholme, Gordon M.
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- 2003
25. Problems in the therapyfor imported Malaria in the United States
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Singh, Kamaljit, Wester, William C., and Trenholme, Gordon M.
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Patients -- Care and treatment ,Patients -- Surveys ,Medication errors -- Surveys ,Malaria -- Diagnosis ,Malaria -- Care and treatment ,Health - Published
- 2003
26. Indomethacin inhibits expansion of experimental aortic aneurysms via inhibition of the cox2 isoform of cyclooxygenase
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Miralles, Manuel, Wester, William, Sicard, Gregorio A., Thompson, Robert, and Reilly, Jeffrey M.
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- 1999
27. Prostaglandin E2 synthesis and cyclooxygenase expression in abdominal aortic aneurysms
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Holmes, Dennis R., Wester, William, Thompson, Robert W., and Reilly, Jeffrey M.
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- 1997
28. Candidate Massive Galaxies at z~4 in the Dark Energy Survey
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Guarnieri, Pierandrea, Maraston, Claudia, Thomas, Daniel, Pforr, Janine, Gonzalez-Perez, Violeta, Etherington, James, Carlsen, Joakim, Morice-Atkinson, Xan, Conselice, Christopher J., Gschwend, Julia, Kind, Matias Carrasco, Abbott, Tim, Allam, Sahar, Brooks, David, Burke, David, Rosell, Aurelio Carnero, Carretero, Jorge, Cunha, Carlos, ďAndrea, Chris, Costa, Luiz da, Vincente, Juan De, DePoy, Darren, Diehl, H. Thomas, Doel, Peter, Frieman, Josh, Garcia-Bellido, Juan, Gruen, Daniel, Gutierrez, Gaston, Hanley, Dominic, Hollowood, Devon, Honscheid, Klaus, James, David, Jeltema, Tesla, Kuehn, Kyler, Lima, Marcos, Maia, Marcio A. G., Marshall, Jennifer, Martini, Paul, Melchior, Peter, Menanteau, Felipe, Miquel, Ramon, Malagon, Andres Plazas, Richardson, Samuel, Romer, Kathy, Sanchez, Eusebio, Scarpine, Vic, Schindler, Rafe, Sevilla, Ignacio, Smith, Mathew, Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Tarle, Gregory, Walker, Alistair, Wester, William, Guarnieri, Pierandrea, Maraston, Claudia, Thomas, Daniel, Pforr, Janine, Gonzalez-Perez, Violeta, Etherington, James, Carlsen, Joakim, Morice-Atkinson, Xan, Conselice, Christopher J., Gschwend, Julia, Kind, Matias Carrasco, Abbott, Tim, Allam, Sahar, Brooks, David, Burke, David, Rosell, Aurelio Carnero, Carretero, Jorge, Cunha, Carlos, ďAndrea, Chris, Costa, Luiz da, Vincente, Juan De, DePoy, Darren, Diehl, H. Thomas, Doel, Peter, Frieman, Josh, Garcia-Bellido, Juan, Gruen, Daniel, Gutierrez, Gaston, Hanley, Dominic, Hollowood, Devon, Honscheid, Klaus, James, David, Jeltema, Tesla, Kuehn, Kyler, Lima, Marcos, Maia, Marcio A. G., Marshall, Jennifer, Martini, Paul, Melchior, Peter, Menanteau, Felipe, Miquel, Ramon, Malagon, Andres Plazas, Richardson, Samuel, Romer, Kathy, Sanchez, Eusebio, Scarpine, Vic, Schindler, Rafe, Sevilla, Ignacio, Smith, Mathew, Soares-Santos, Marcelle, Sobreira, Flavia, Suchyta, Eric, Tarle, Gregory, Walker, Alistair, and Wester, William
- Abstract
Using stellar population models, we predicted that the Dark Energy Survey (DES) - due to its special combination of area (5000 deg. sq.) and depth ($i = 24.3$) - would be in the position to detect massive ($\gtrsim 10^{11}$ M$_{\odot}$) galaxies at $z \sim 4$. We confront those theoretical calculations with the first $\sim 150$ deg. sq. of DES data reaching nominal depth. From a catalogue containing $\sim 5$ million sources, $\sim26000$ were found to have observed-frame $g-r$ vs $r-i$ colours within the locus predicted for $z \sim 4$ massive galaxies. We further removed contamination by stars and artefacts, obtaining 606 galaxies lining up by the model selection box. We obtained their photometric redshifts and physical properties by fitting model templates spanning a wide range of star formation histories, reddening and redshift. Key to constrain the models is the addition, to the optical DES bands $g$, $r$, $i$, $z$, and $Y$, of near-IR $J$, $H$, $K_{s}$ data from the Vista Hemisphere Survey. We further applied several quality cuts to the fitting results, including goodness of fit and a unimodal redshift probability distribution. We finally select 233 candidates whose photometric redshift probability distribution function peaks around $z\sim4$, have high stellar masses ($\log($M$^{*}$/M$_{\odot})\sim 11.7$ for a Salpeter IMF) and ages around 0.1 Gyr, i.e. formation redshift around 5. These properties match those of the progenitors of the most massive galaxies in the local universe. This is an ideal sample for spectroscopic follow-up to select the fraction of galaxies which is truly at high redshift. These initial results and those at the survey completion, which we shall push to higher redshifts, will set unprecedented constraints on galaxy formation, evolution, and the re-ionisation epoch.
- Published
- 2019
29. Tuberculosis in Pediatric Antiretroviral Therapy Programs in Low- and Middle-Income Countries: Diagnosis and Screening Practices
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Ballif, Marie, Renner, Lorna, Claude Dusingize, Jean, Leroy, Valeriane, Ayaya, Samuel, Wools-Kaloustian, Kara, Cortes, Claudia P., McGowan, Catherine C., Graber, Claire, Mandalakas, Anna M., Mofenson, Lynne M., Egger, Matthias, Kumara Wati, Ketut Dewi, Nallusamy, Revathy, Reubenson, Gary, Davies, Mary-Ann, Fenner, Lukas, Ajayi, Samuel, Anastos, Kathryn, Bashi, Jules, Bishai, William, Boulle, Andrew, Braitstein, Paula, Carriquiry, Gabriela, Carter, Jane E., Cegielski, Peter, Chimbetete, Cleophas, Conrad, Joseph, Cortes, Claudia, Diero, Lameck, Duda, Stephany, Durier, Nicolas, Dusingize, Jean Claude, Eboua, Tanoh F., Gasser, Adrian, Geng, Elvin, Gnokori, Joachim Charles, Hardwicke, Laura, Hoffmann, Chris, Huebner, Robin, Kancheya, Nzali, Kiertiburanakul, Sasisopin, Kim, Peter, Lameck, Diero, Leroy, Valériane, Lewden, Charlotte, Lindegren, Mary Lou, Mandalakas, Anna, Maskew, Mhairi, McKaig, Rosemary, Mofenson, Lynne, Mpoudi-Etame, Mireille, Okwara, Benson, Phiri, Sam, Prasitsuebsai, Wasana, Petit, April, Prozesky, Hans, Reid, Stewart E., Sohn, Annette, Sterling, Timothy, Vo, Quynh, Walker, Dana, Wehbe, Firas, Wejse, Christian, Wester, William, Williams, Carlie, Wood, Robin, Yao, Zhang, Yunihastuti, Evy, Abrams, Elaine, Ananworanich, Jintanat, Azondekon, Alain, Frieda Behets, Melanie Bacon, Cahn, Pedro, Cesar, Carina, Ciaranello, Andrea, Dabis, François, Edmonds, Andrew, Feinstein, Lydia, Hazra, Rohan, Hoover, Don, Keiser, Olivia, Magneres, Maria Cecilia, McGowan, Catherine, Messerschmidt, Liesl, Biribonwoha, Harriet Nuwagaba, Sharp, Gerald, Vreeman, Rachel, Worrell, Carol, Yiannoutsos, Constantine, and Zwickl, Beth
- Abstract
Background The global burden of childhood tuberculosis (TB) is estimated to be 0.5 million new cases per year. Human immunodeficiency virus (HIV)-infected children are at high risk for TB. Diagnosis of TB in HIV-infected children remains a major challenge. Methods We describe TB diagnosis and screening practices of pediatric antiretroviral treatment (ART) programs in Africa, Asia, the Caribbean, and Central and South America. We used web-based questionnaires to collect data on ART programs and patients seen from March to July 2012. Forty-three ART programs treating children in 23 countries participated in the study. Results Sputum microscopy and chest Radiograph were available at all programs, mycobacterial culture in 40 (93%) sites, gastric aspiration in 27 (63%), induced sputum in 23 (54%), and Xpert MTB/RIF in 16 (37%) sites. Screening practices to exclude active TB before starting ART included contact history in 41 sites (84%), symptom screening in 38 (88%), and chest Radiograph in 34 sites (79%). The use of diagnostic tools was examined among 146 children diagnosed with TB during the study period. Chest Radiograph was used in 125 (86%) children, sputum microscopy in 76 (52%), induced sputum microscopy in 38 (26%), gastric aspirate microscopy in 35 (24%), culture in 25 (17%), and Xpert MTB/RIF in 11 (8%) children. Conclusions Induced sputum and Xpert MTB/RIF were infrequently available to diagnose childhood TB, and screening was largely based on symptom identification. There is an urgent need to improve the capacity of ART programs in low- and middle-income countries to exclude and diagnose TB in HIV-infected children
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- 2017
30. The Fermilab Holometer
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Chou, Aaron, primary, Hogan, Craig, additional, Ramberg, Erik, additional, Steffen, Jason, additional, Stoughton, Chris, additional, Tomlin, Ray, additional, Wester, William, additional, Waldman, Sam, additional, Weiss, Rainer, additional, Meyer, Stephan, additional, Gustafson, H.Richard, additional, and Whitcomb, Stanley, additional
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- 2009
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31. GammeV: A gamma to milli-eV particle search
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Chou, Aaron, primary, Wester, William, additional, Baumbaugh, A., additional, Mazur, P., additional, Steffen, J., additional, Tomlin, R., additional, Yang, Xi, additional, and Yoo, J., additional
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- 2007
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32. Candidate massive galaxies atz ∼ 4 in the Dark Energy Survey
- Author
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Guarnieri, Pierandrea, primary, Maraston, Claudia, additional, Thomas, Daniel, additional, Pforr, Janine, additional, Gonzalez-Perez, Violeta, additional, Etherington, James, additional, Carlsen, Joakim, additional, Morice-Atkinson, Xan, additional, Conselice, Christopher J, additional, Gschwend, Julia, additional, Carrasco Kind, Matias, additional, Abbott, Tim, additional, Allam, Sahar, additional, Brooks, David, additional, Burke, David, additional, Carnero Rosell, Aurelio, additional, Carretero, Jorge, additional, Cunha, Carlos, additional, D’Andrea, Chris, additional, da Costa, Luiz, additional, De Vincente, Juan, additional, DePoy, Darren, additional, Thomas Diehl, H, additional, Doel, Peter, additional, Frieman, Josh, additional, Garcia-Bellido, Juan, additional, Gruen, Daniel, additional, Gutierrez, Gaston, additional, Hanley, Dominic, additional, Hollowood, Devon, additional, Honscheid, Klaus, additional, James, David, additional, Jeltema, Tesla, additional, Kuehn, Kyler, additional, Lima, Marcos, additional, Maia, Marcio A G, additional, Marshall, Jennifer, additional, Martini, Paul, additional, Melchior, Peter, additional, Menanteau, Felipe, additional, Miquel, Ramon, additional, Plazas Malagon, Andres, additional, Richardson, Samuel, additional, Romer, Kathy, additional, Sanchez, Eusebio, additional, Scarpine, Vic, additional, Schindler, Rafe, additional, Sevilla, Ignacio, additional, Smith, Mathew, additional, Soares-Santos, Marcelle, additional, Sobreira, Flavia, additional, Suchyta, Eric, additional, Tarle, Gregory, additional, Walker, Alistair, additional, and Wester, William, additional
- Published
- 2018
- Full Text
- View/download PDF
33. Dark energy survey operations: years 4 and 5
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Gruendl, Robert A., primary, Tucker, Douglas L., primary, Bocquet, Sebastian, primary, Ferte, Agnes, primary, Friswell, Indiarose, primary, Furnell, Kate E., primary, Khullar, Gourav, primary, Kron, Richard, primary, Kuropatkin, Nikolay, primary, Lasker, James, primary, Manera, Marc, primary, March, Marisa, primary, Medford, Michael, primary, Menanteau, Felipe, primary, Mohammed, Irshad, primary, Monroy, Martin, primary, Moraes, Bruno, primary, Morganson, Eric, primary, Muir, Jessica, primary, Murphy, Martin, primary, Nord, Brian, primary, Pace, Anthony, primary, Palmese, Antonella, primary, Park, Youngsoo, primary, Paz-Chinchon, Francisko, primary, Pereira, Maria E., primary, Petravick, Donald, primary, Plazas, Andres, primary, Poh, Jason, primary, Prochaska, Travis, primary, Sako, Masao, primary, Sauseda, Marcus, primary, Scolnic, Daniel, primary, Secco, Lucas, primary, Sevilla-Noarbe, Ignacio, primary, Shipp, Nora, primary, Smith, John A., primary, Soergel, Bjeorn, primary, Stebbins, Albert, primary, Story, Kyle, primary, Stringer, Katelyn, primary, Tarsitano, Ferderica, primary, Thomas, Benjamin, primary, Vivas, Kathy, primary, Wang, Mei-yu, primary, Weaverdyck, Curtis, primary, Weaverdyck, Noah, primary, wester, William, primary, Wethers, Clare, primary, Wilkenson, Reece, primary, Wu, Hao-Yi, primary, Yanny, Brian, primary, Zenteno, Alfredo, primary, Zhang, Yuanyuan, primary, Diehl, H. Thomas, primary, Neilsen, Eric, primary, Marshall, Jennifer L., primary, DePoy, Darren L., primary, Romer, A. Kathy, primary, Abbott, Timothy M., primary, Soares-Santos, Marcelle, primary, Allam, Sahar, primary, Walker, Alistair R., primary, Kent, Stephen M., primary, Honscheid, Klaus, primary, Roodman, Aaron, primary, Lathrop, Andrew G., primary, Reil, Kevin, primary, Li, Ting S., primary, Elliott, Anne E., primary, Alvarez, Otto, primary, Annis, James, primary, Balbinot, Eduardo, primary, Bhargava, Sunayana, primary, Bechtol, Keith, primary, Bernstein, Gary, primary, Bhatawdekar, Rachana, primary, Brout, Dillon, primary, Capasso, Raffaella, primary, Cawthon, Ross, primary, Chang, Chihway, primary, Cook, Erika, primary, Conselice, Chris, primary, Cruz, Jamie, primary, D'Andrea, Chris, primary, da Costa, Luiz, primary, Das, Rutuparna, primary, Drlica-Wagner, Alex, primary, Everett, Spencer W., primary, Frieman, Josh, primary, Fausti-Neto, Angelo, primary, Gelman, Landon P., primary, Gerdes, David W., primary, Gill, Mandeep S., primary, Goldstein, Daniel A., primary, Gruen, Daniel, primary, Gulledge, Deborah J., primary, Hamilton, Stephanie, primary, Hollowood, Devon, primary, James, David J., primary, Johnson, Michael D., primary, Johnson, Margaret W., primary, Kessler, Richard S., primary, Kovacs, Eve, primary, and Kremin, Anthony, primary
- Published
- 2018
- Full Text
- View/download PDF
34. Second Change: A Roleplayed Weekend
- Author
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Wester, William C., II
- Abstract
A voluntary college orientation weekend which involved roleplaying activities through which the participants learned more about themselves, their companions, and their priorities is described. (JC)
- Published
- 1973
35. Dark Energy Physics From A Space - Based Wide Area Sky Survey
- Author
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Annis, James, primary, DeJongh, Don, additional, Frieman, Joshua, additional, Hui, Lam, additional, Lin, Huan, additional, Marriner, John, additional, Scarpine, Vic, additional, Stebbins, Albert, additional, Stoughton, Chris, additional, Wester, William, additional, Kent, Stephen, additional, and Limon, Peter, additional
- Published
- 2003
- Full Text
- View/download PDF
36. The "Beulah"—Restored, Rededicated
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Wester, William C.
- Published
- 1984
37. A study of quasar selection in the supernova fields of the Dark Energy Survey
- Author
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Tie, Suk Sien, Martini, Paul, Mudd, Dale, Ostrovski, F., Reed, Sophie L., Lidman, Chris, Kochanek, C.S., Davis, Tamara M., Sharp, Robert G., Uddin, Syed, King, Anthea L., Wester, William Carl, Tucker, Bradley, Tucker, Douglas L., Buckley-Geer, Elizabeth, Carollo, Daniela, Childress, Michael, Glazebrook, Karl, Hinton, Samuel, Lewis, Geraint F., Macaulay, Edward, O'Neill, C. R., Abbott, Timothy M. C., Abdalla, Filipe B., Annis, James T., Benoit-Lévy, Aurélien, Bertin, Emmanuel, Brooks, D., Carnero Rosell, Aurelio, Carrasco Kind, Matías, Carretero Palacios, Jorge, Cunha, Carlos Eduardo, Costa, Luiz N. da, DePoy, Darren L., Desai, S., Doel, Peter, Eifler, Tim, Evrard, August E., Finley, David A., Flaugher, Brenna, Fosalba Vela, Pablo, Frieman, Joshua A., García-Bellido, Juan, Gaztañaga, Enrique, Gerdes, David W., Goldstein, Daniel Abraham, Gruen, Daniel, Gruendl, Robert A., Gutierrez, Gaston R., Honscheid, K., James, David J., Kuehn, Kyler, Kuropatkin, Nikolay P., Lima, Marcos Vinicius Borges Teixeira, Maia, Marcio Antonio Geimba, Marshall, Jennifer L., Menanteau, Felipe, Miller, Christopher J., Miquel, Ramon, Nichol, Robert C., Nord, Brian Dennis, Ogando, Ricardo L.C., Plazas Malagón, Andrés Alejandro, Romer, Anita K., Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Scarpine, Victor Emanuel, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Thomas, D., Walker, Alistair, and DES Collaboration
- Subjects
Mapeamentos astronômicos ,Fotometria astronômica ,Catalogos astronomicos ,general [Quasars] ,Quasars - Abstract
We present a study of quasar selection using the supernova fields of the Dark Energy Survey (DES). We used a quasar catalog from an overlapping portion of the SDSS Stripe 82 region to quantify the completeness and efficiency of selection methods involving color, probabilistic modeling, variability, and combinations of color/ probabilistic modeling with variability. In all cases, we considered only objects that appear as point sources in the DES images. We examine color selection methods based on the Wide-field Infrared Survey Explorer (WISE) mid- IR W1 - W2 color, a mixture of WISE and DES colors (g − i and i - W1), and a mixture of Vista Hemisphere Survey and DES colors (g − i and i − K ). For probabilistic quasar selection, we used XDQSO, an algorithm that employs an empirical multi-wavelength flux model of quasars to assign quasar probabilities. Our variability selection uses the multi-band χ2-probability that sources are constant in the DES Year 1 griz-band light curves. The completeness and efficiency are calculated relative to an underlying sample of point sources that are detected in the required selection bands and pass our data quality and photometric error cuts. We conduct our analyses at two magnitude limits, i85% for both i-band magnitude limits and efficiencies of >80% to the bright limit and >60% to the faint limit; however, the giW1 and giW1+variability methods give the highest quasar surface densities. The XDQSOz method and combinations of W1W2/giW1/XDQSOz with variability are among the better selection methods when both high completeness and high efficiency are desired. We also present the OzDES Quasar Catalog of 1263 spectroscopically confirmed quasars from three years of OzDES observation in the 30 deg2 of the DES supernova fields. The catalog includes quasars with redshifts up to z4 and brighter than i = 22 mag, although the catalog is not complete up to this magnitude limit.
- Published
- 2017
38. Farthest neighbor : the distant Milky Way satellite Eridanus II
- Author
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Li, T. S., Simon, Josh D., Drlica-Wagner, Alex, Bechtol, Keith, Wang, M., García-Bellido, Juan, Frieman, Joshua A., Marshall, Jennifer L., James, David J., Strigari, Louis E., Pace, Andrew B., Balbinot, Eduardo, Zhang, Yuanyuan, Abbott, Timothy M. C., Allam, Sahar S., Benoit-Lévy, Aurélien, Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Burke, David Lyle, Carnero Rosell, Aurelio, Carrasco Kind, Matías, Carretero Palacios, Jorge, Cunha, Carlos Eduardo, D'Andrea, Christopher B., Costa, Luiz N. da, DePoy, Darren L., Desai, S., Diehl, H. Thomas, Eifler, Tim, Flaugher, Brenna, Goldstein, Daniel Abraham, Gruen, Daniel, Gruendl, Robert A., Gschwend, Julia de Figueiredo, Gutierrez, Gaston R., Krause, Elisabeth, Kuehn, Kyler, Lin, H., Maia, Marcio Antonio Geimba, March, Marisa Cristina, Menanteau, Felipe, Miquel, Ramon, Plazas Malagón, Andrés Alejandro, Romer, Anita K., Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Sobreira, Flávia, Suchyta, Eric, Tarle, Gregory, Thomas, D., Tucker, Douglas L., Walker, Alistair, Wechsler, Risa H., Wester, William Carl, Yanny, Brian, and DES Collaboration
- Subjects
dwarf [Galaxies] ,Populacoes estelares ,Via láctea ,abundances [Stars] ,Dark matter ,Local group ,Matéria escura ,stellar content [Galaxies] ,individual (Eridanus II) [Galaxies] ,Composicao estelar ,Metalicidade ,Galáxias - Abstract
We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite EridanusII (Eri II). We identify 28 member stars in EriII, from which we measure a systemic radial velocity of vhel = 75.6 1.3 (stat.) 2.0 (sys.) km s-1 and a velocity dispersion of - 6.9+0.9 1.2 km s-1. Assuming that EriII is a dispersion-supported system in dynamical equilibrium, we derive a mass within the half-light radius of - ´ 1.2+ 10 0.3 0.4 7 M, indicating a mass-tolight ratio of - 420+140 210 M/L and confirming that it is a dark matter-dominated dwarf galaxy. From the equivalent width measurements of the Ca triplet lines of 16 red giant member stars, we derive a mean metallicity of [Fe/ H]=−2.38±0.13 and a metallicity dispersion of s[ / ] = - 0.47+ Fe H 0.09 0.12. The velocity of EriII in the Galactic standard of rest frame is vGSR=−66.6 km s-1, indicating that either EriII is falling into the Milky Way potential for the first time or that it has passed the apocenter of its orbit on a subsequent passage. At a Galactocentric distance of 370 kpc, Eri II is one of the Milky Way’s most distant satellites known. Additionally, we show that the bright blue stars previously suggested to be a young stellar population are not associated with EriII. The lack of gas and recent star formation in EriII is surprising given its mass and distance from the Milky Way, and may place constraints on models of quenching in dwarf galaxies and on the distribution of hot gas in the Milky Way halo. Furthermore, the large velocity dispersion of Eri II can be combined with the existence of a central star cluster to constrain massive compact halo object dark matter with mass 10 M.
- Published
- 2017
39. Observation of two new L4 Neptune Trojans in the Dark Energy Survey supernova fields
- Author
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Gerdes, David W., Jennings, R. J., Bernstein, Gary M., Sako, Masao, Adams, Fred, Goldstein, Daniel Abraham, Kessler, Richard S., Hamilton, S., Abbott, Timothy M. C., Abdalla, Filipe B., Allam, Sahar S., Benoit-Lévy, Aurélien, Bertin, Emmanuel, Brooks, D., Buckley-Geer, Elizabeth, Burke, David Lyle, Capozzi, Diego, Carnero Rosell, Aurelio, Carrasco Kind, Matías, Carretero Palacios, Jorge, Cunha, Carlos Eduardo, D'Andrea, Christopher B., Costa, Luiz N. da, DePoy, Darren L., Desai, S., Dietrich, Jörg P., Doel, Peter, Eifler, Tim, Fausti Neto, Angelo, Flaugher, Brenna, Frieman, Joshua A., Gaztañaga, Enrique, Gruen, Daniel, Gruendl, Robert A., Gutierrez, Gaston R., Honscheid, K., James, David J., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Li, T. S., Maia, Marcio Antonio Geimba, March, Marisa Cristina, Martini, Paul, Miller, Christopher J., Miquel, Ramon, Nichol, Robert C., Nord, Brian Dennis, Ogando, Ricardo L.C., Plazas Malagón, Andrés Alejandro, Romer, Anita K., Roodman, Aaron, Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Thaler, Jon J., Walker, Alistair, Wester, William Carl, Zhang, Yuanyuan, and DES Collaboration
- Subjects
Asteroides ,Sistema solar ,Fotometria astronômica ,Minor planets ,general [Asteroids] - Abstract
We report the discovery of the eighth and ninth known Trojans in stable orbits around Neptune’s leading Lagrange point, L4. The objects 2014QO441 and 2014QP441 were detected in data obtained during the 2013–14 and 2014–15 observing seasons by the Dark Energy Survey, using the Dark Energy Camera (DECam) on the 4-m Blanco telescope at Cerro Tololo Inter-American Observatory. Both are in high-inclination orbits (18°.8 and 19°.4, respectively). With an eccentricity of 0.104, 2014QO441 has the most eccentric orbit of the 11 known stable Neptune Trojans. Here we describe the search procedure and investigate the objects’ long-term dynamical stability and physical properties.
- Published
- 2016
40. redMaGiC : selecting luminous red galaxies from the DES Science Verification data
- Author
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Rozo, Eduardo, Rykoff, Eli, Abate, Alexandra, Bonnet, Christopher Clive, Crocce, Martin, Davis, Christopher P., Hoyle, Ben, Leistedt, Boris, Peiris, Hiranya V., Wechsler, Risa H., Abbott, Timothy M. C., Abdalla, Filipe B., Banerji, M., Bauer, Anne Hollister, Benoit-Lévy, Aurélien, Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Buckley-Geer, Elizabeth, Burke, David Lyle, Capozzi, Diego, Carnero Rosell, Aurelio, Carollo, Daniela, Carrasco Kind, Matías, Carretero Palacios, Jorge, Castander Serentill, Francisco Javier, Childress, Michael, Cunha, Carlos Eduardo, D'Andrea, Christopher B., Davis, Tamara M., DePoy, Darren L., Desai, S., Diehl, H. Thomas, Dietrich, Jörg P., Doel, Peter, Eifler, Tim, Evrard, August E., Fausti Neto, Angelo, Flaugher, Brenna, Fosalba Vela, Pablo, Frieman, Joshua A., Gaztañaga, Enrique, Gerdes, David W., Glazebrook, Karl, Gruen, Daniel, Gruendl, Robert A., Honscheid, K., James, David J., Jarvis, Michael, Kim, A. G., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Lewis, Geraint F., Lidman, Chris, Lima, Marcos Vinicius Borges Teixeira, Maia, Marcio Antonio Geimba, March, Marisa Cristina, Martini, Paul, Melchior, Peter M., Miller, Christopher J., Miquel, Ramon, Mohr, Joseph J., Nichol, Robert C., Nord, Brian Dennis, O'Neill, C. R., Ogando, Ricardo L.C., Plazas Malagón, Andrés Alejandro, Romer, Anita K., Roodman, Aaron, Sako, Masao, Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Thaler, Jon J., Thomas, D., Uddin, Syed, Vikram, Vinu, Walker, Alistair, Wester, William Carl, Zhang, Yuanyuan, and Costa, Luiz N. da
- Subjects
statistical [Methods] ,Fotometria astronômica ,photometric [Techniques] ,general [Galaxies] ,Deslocamento para o vermelho ,Galáxias - Abstract
We introduce redMaGiC, an automated algorithm for selecting luminous red galaxies (LRGs). The algorithm was specifically developed to minimize photometric redshift uncertainties in photometric large-scale structure studies. redMaGiC achieves this by self-training the colour cuts necessary to produce a luminosity-thresholded LRG sample of constant comoving density. We demonstrate that redMaGiC photo-zs are very nearly as accurate as the best machine learning-based methods, yet they require minimal spectroscopic training, do not suffer from extrapolation biases, and are very nearly Gaussian. We apply our algorithm to Dark Energy Survey (DES) Science Verification (SV) data to produce a redMaGiC catalogue sampling the redshift range z ∈ [0.2, 0.8]. Our fiducial sample has a comoving space density of 10−3 (h−1 Mpc)−3, and a median photo-z bias (zspec − zphoto) and scatter (σz/(1 + z)) of 0.005 and 0.017, respectively. The corresponding 5σ outlier fraction is 1.4 per cent.We also test our algorithm with Sloan Digital Sky Survey Data Release 8 and Stripe 82 data, and discuss how spectroscopic training can be used to control photo-z biases at the 0.1 per cent level.
- Published
- 2016
41. A Measurement of the mass of the $B_s$ 0 meson in $p\bar{p}$ collisions at $S^{(1/2)}$ = 1.8-TeV
- Author
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Wester, William III, primary
- Published
- 1994
- Full Text
- View/download PDF
42. Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element $\bf V_{tb}$
- Author
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Aaltonen, Timo Antero, Abazov, Victor Mukhamedovich, Abbott, Braden Keim, Acharya, Bannanje Sripath, Adams, Mark Raymond, Adams, Todd, Agnew, James P, Alexeev, Guennadi D, Alkhazov, Georgiy D, Alton, Andrew K, Amerio, Silvia, Amidei, Dante E, Anastassov, Anton Iankov, Annovi, Alberto, Antos, Jaroslav, Apollinari, Giorgio, Appel, Jeffrey A, Arisawa, Tetsuo, Artikov, Akram Muzafarovich, Asaadi, Jonathan A, Ashmanskas, William Joseph, Askew, Andrew Warren, Atkins, Scott, Auerbach, Benjamin, Augsten, Kamil, Aurisano, Adam J, Avila, Carlos A, Azfar, Farrukh A, Badaud, Frederique, Badgett, William Farris, Bae, Taegil, Bagby, Linda F, Baldin, Boris, Bandurin, Dmitry V, Banerjee, Sunanda, Barbaro-Galtieri, Angela, Barberis, Emanuela, Baringer, Philip S, Barnes, Virgil E, Barnett, Bruce Arnold, Barria, Patrizia, Bartlett, JFrederick, Bartos, Pavol, Bassler, Ursula Rita, Bauce, Matteo, Bazterra, Victor, Bean, Alice L, Bedeschi, Franco, Begalli, Marcia, Behari, Satyajit, Bellantoni, Leo, Bellettini, Giorgio, Bellinger, James Nugent, Benjamin, Douglas P, Beretvas, Andrew F, Beri, Suman B, Bernardi, Gregorio, Bernhard, Ralf Patrick, Bertram, Iain A, Besancon, Marc, Beuselinck, Raymond, Bhat, Pushpalatha C, Bhatia, Sudeep, Bhatnagar, Vipin, Bhatti, Anwar Ahmad, Bland, Karen Renee, Blazey, Gerald Charles, Blessing, Susan K, Bloom, Kenneth A, Blumenfeld, Barry J, Bocci, Andrea, Bodek, Arie, Boehnlein, Amber S, Boline, Daniel Dooley, Boos, Edward E, Borissov, Guennadi, Bortoletto, Daniela, Borysova, Maryna, Boudreau, Joseph Francis, Boveia, Antonio, Brandt, Andrew, Brandt, Oleg, Brigliadori, Luca, Brock, Raymond L, Bromberg, Carl Michael, Bross, Alan D, Brown, Duncan Paul, Brucken, Erik, Bu, Xue-Bing, Budagov, Ioulian A, Budd, Howard Scott, Buehler, Marc, Buescher, Volker, Bunichev, Viacheslav Yevgenyevich, Burdin, Sergey, Burkett, Kevin Alan, Busetto, Giovanni, Bussey, Peter John, Buszello, Claus Peter, Butti, Pierfrancesco, Buzatu, Adrian, Calamba, Aristotle, Camacho-Perez, Enrique, Camarda, Stefano, Campanelli, Mario, Canelli, Florencia, Carls, Benjamin, Carlsmith, Duncan L, Carosi, Roberto, Carrillo Moreno, Salvador, Casal Larana, Bruno, Casarsa, Massimo, Casey, Brendan Cameron Kieran, Castilla-Valdez, Heriberto, Castro, Andrea, Catastini, Pierluigi, Caughron, Seth Aaron, Cauz, Diego, Cavaliere, Viviana, Cerri, Alessandro, Cerrito, Lucio, Chakrabarti, Subhendu, Chan, Kwok Ming Leo, Chandra, Avdhesh, Chapon, Emilien, Chen, Guo, Chen, Yen-Chu, Chertok, Maxwell Benjamin, Chiarelli, Giorgio, Chlachidze, Gouram, Cho, Kihyeon, Cho, Sung-Woong, Choi, Suyong, Chokheli, Davit, Choudhary, Brajesh C, Cihangir, Selcuk, Claes, Daniel R, Clark, Allan Geoffrey, Clarke, Christopher Joseph, Clutter, Justace Randall, Convery, Mary Elizabeth, Conway, John Stephen, Cooke, Michael P, Cooper, William Edward, Corbo, Matteo, Corcoran, Marjorie D, Cordelli, Marco, Couderc, Fabrice, Cousinou, Marie-Claude, Cox, Charles Alexander, Cox, David Jeremy, Cremonesi, Matteo, Cruz Alonso, Daniel, Cuevas Maestro, Javier, Culbertson, Raymond Lloyd, Cutts, David, Das, Amitabha, D'Ascenzo, Nicola, Datta, Mousumi, Davies, Gavin John, De Barbaro, Pawel, De Jong, Sijbrand Jan, De La Cruz-Burelo, Eduard, Deliot, Frederic, Demina, Regina, Demortier, Luc M, Deninno, Maria Maddalena, Denisov, Dmitri S, Denisov, Sergei P, D'Errico, Maria, Desai, Satish Vijay, Deterre, Cecile, DeVaughan, Kayle Otis, Devoto, Francesco, Di Canto, Angelo, Di Ruzza, Benedetto, Diehl, HThomas, Diesburg, Michael, Ding, Pengfei, Dittmann, Jay Richard, Dominguez, DAaron M, Donati, Simone, D'Onofrio, Monica, Dorigo, Mirco, Driutti, Anna, Dubey, Abhinav Kumar, Dudko, Lev V, Duperrin, Arnaud, Dutt, Suneel, Eads, Michael T, Ebina, Koji, Edgar, Ryan Christopher, Edmunds, Daniel L, Elagin, Andrey L, Ellison, John A, Elvira, VDaniel, Enari, Yuji, Erbacher, Robin D, Errede, Steven Michael, Esham, Benjamin, Evans, Harold G, Evdokimov, Valeri N, Farrington, Sinead Marie, Faure, Alexandre, Feng, Lei, Ferbel, Thomas, Fernández Ramos, Juan Pablo, Fiedler, Frank, Field, Richard D, Filthaut, Frank, Fisher, Wade Cameron, Fisk, HEugene, Flanagan, Gene U, Forrest, Robert David, Fortner, Michael R, Fox, Harald, Franklin, Melissa EB, Freeman, John Christian, Frisch, Henry J, Fuess, Stuart C, Funakoshi, Yujiro, Galloni, Camilla, Garbincius, Peter H, Garcia-Bellido, Aran, Garcia-Gonzalez, Jose Andres, Garfinkel, Arthur F, Garosi, Paola, Gavrilov, Vladimir B, Geng, Weigang, Gerber, Cecilia Elena, Gerberich, Heather Kay, Gerchtein, Elena A, Gershtein, Yuri S, Giagu, Stefano, Giakoumopoulou, Viktoria Athina, Gibson, Karen Ruth, Ginsburg, Camille Marie, Ginther, George E, Giokaris, Nikos D, Giromini, Paolo, Glagolev, Vladimir, Glenzinski, Douglas Andrew, Gogota, Olga, Gold, Michael S, Goldin, Daniel, Golossanov, Alexander, Golovanov, Georgy Anatolievich, Gomez, Gervasio, Gomez-Ceballos, Guillelmo, Goncharov, Maxim T, González López, Oscar, Gorelov, Igor V, Goshaw, Alfred T, Goulianos, Konstantin A, Gramellini, Elena, Grannis, Paul D, Greder, Sebastien, Greenlee, Herbert B, Grenier, Gerald Jean, Gris, Phillipe Luc, Grivaz, Jean-Francois, Grohsjean, Alexander, Grosso-Pilcher, Carla, Group, Robert Craig, Gruenendahl, Stefan, Gruenewald, Martin Werner, Guillemin, Thibault, Guimaraes Da Costa, Joao, Gutierrez, Gaston R, Gutierrez, Phillip, Hahn, Stephen R, Haley, Joseph Glenn Biddle, Han, Ji-Yeon, Han, Liang, Happacher, Fabio, Hara, Kazuhiko, Harder, Kristian, Hare, Matthew Frederick, Harel, Amnon, Harr, Robert Francis, Harrington-Taber, Timothy, Hatakeyama, Kenichi, Hauptman, John Michael, Hays, Christopher Paul, Hays, Jonathan M, Head, Tim, Hebbeker, Thomas, Hedin, David R, Hegab, Hatim, Heinrich, Joel G, Heinson, Ann, Heintz, Ulrich, Hensel, Carsten, Heredia-De La Cruz, Ivan, Herndon, Matthew Fairbanks, Herner, Kenneth Richard, Hesketh, Gavin G, Hildreth, Michael D, Hirosky, Robert James, Hoang, Trang, Hobbs, John D, Hocker, James Andrew, Hoeneisen, Bruce, Hogan, Julie, Hohlfeld, Mark, Holzbauer, Jenny Lyn, Hong, Ziqing, Hopkins, Walter Howard, Hou, Suen Ray, Howley, Ian James, Hubacek, Zdenek, Hughes, Richard Edward, Husemann, Ulrich, Hussein, Mohammad, Huston, Joey Walter, Hynek, Vlastislav, Iashvili, Ia, Ilchenko, Yuriy, Illingworth, Robert A, Introzzi, Gianluca, Iori, Maurizio, Ito, Albert S, Ivanov, Andrew Gennadievich, Jabeen, Shabnam, Jaffre, Michel J, James, Eric B, Jang, Dongwook, Jayasinghe, Ayesh, Jayatilaka, Bodhitha Anjalike, Jeon, Eun-Ju, Jeong, Min-Soo, Jesik, Richard L, Jiang, Peng, Jindariani, Sergo Robert, Johns, Kenneth Arthur, Johnson, Emily, Johnson, Marvin E, Jonckheere, Alan M, Jones, Matthew T, Jonsson, Per Martin, Joo, Kyung Kwang, Joshi, Jyoti, Jun, Soon Yung, Jung, Andreas Werner, Junk, Thomas R, Juste, Aurelio, Kajfasz, Eric, Kambeitz, Manuel, Kamon, Teruki, Karchin, Paul Edmund, Karmanov, Dmitriy Y, Kasmi, Azeddine, Kato, Yukihiro, Katsanos, Ioannis, Kaur, Manbir, Kehoe, Robert Leo Patrick, Kermiche, Smain, Ketchum, Wesley Robert, Keung, Justin Kien, Khalatyan, Norayr, Khanov, Alexander, Kharchilava, Avto, Kharzheev, Yuri N, Kilminster, Benjamin John, Kim, DongHee, Kim, Hyunsoo, Kim, Jieun, Kim, Min Jeong, Kim, Shin-Hong, Kim, Soo Bong, Kim, Young-Jin, Kim, Young-Kee, Kimura, Naoki, Kirby, Michael H, Kiselevich, Ivan Lvovich, Knoepfel, Kyle James, Kohli, Jatinder M, Kondo, Kunitaka, Kong, Dae Jung, Konigsberg, Jacobo, Kotwal, Ashutosh Vijay, Kozelov, Alexander V, Kraus, James Alexander, Kreps, Michal, Kroll, IJoseph, Kruse, Mark Charles, Kuhr, Thomas, Kumar, Ashish, Kupco, Alexander, Kurata, Masakazu, Kurca, Tibor, Kuzmin, Valentin Alexandrovich, Laasanen, Alvin Toivo, Lammel, Stephan, Lammers, Sabine Wedam, Lancaster, Mark, Lannon, Kevin Patrick, Latino, Giuseppe, Lebrun, Patrice, Lee, Hyeon-Seung, Lee, Hyun Su, Lee, Jaison, Lee, Seh-Wook, Lee, William M, Lei, Xiaowen, Lellouch, Jeremie, Leo, Sabato, Leone, Sandra, Lewis, Jonathan D, Li, Dikai, Li, Hengne, Li, Liang, Li, Qi-Zhong, Lim, Jeong Ku, Limosani, Antonio, Lincoln, Donald W, Linnemann, James Thomas, Lipaev, Vladimir V, Lipeles, Elliot David, Lipton, Ronald J, Lister, Alison, Liu, Hao, Liu, Huanzhao, Liu, Qiuguang, Liu, Tiehui Ted, Liu, Yanwen, Lobodenko, Alexandre, Lockwitz, Sarah E, Loginov, Andrey Borisovich, Lokajicek, Milos, Lopes De Sa, Rafael, Lucchesi, Donatella, Lucà, Alessandra, Lueck, Jan, Lujan, Paul Joseph, Lukens, Patrick Thomas, Luna-Garcia, Rene, Lungu, Gheorghe, Lyon, Adam Leonard, Lys, Jeremy E, Lysak, Roman, Maciel, Arthur KA, Madar, Romain, Madrak, Robyn Leigh, Maestro, Paolo, Magana-Villalba, Ricardo, Malik, Sarah Alam, Malik, Sudhir, Malyshev, Vladimir L, Manca, Giulia, Manousakis-Katsikakis, Arkadios, Mansour, Jason, Marchese, Luigi Marchese, Margaroli, Fabrizio, Marino, Christopher Phillip, Martinez-Ortega, Jorge, Matera, Keith, Mattson, Mark Edward, Mazzacane, Anna, Mazzanti, Paolo, McCarthy, Robert L, Mcgivern, Carrie Lynne, McNulty, Ronan, Mehta, Andrew, Mehtala, Petteri, Meijer, Melvin M, Melnitchouk, Alexander S, Menezes, Diego D, Mercadante, Pedro Galli, Merkin, Mikhail M, Mesropian, Christina, Meyer, Arnd, Meyer, Jorg Manfred, Miao, Ting, Miconi, Florian, Mietlicki, David John, Mitra, Ankush, Miyake, Hideki, Moed, Shulamit, Moggi, Niccolo, Mondal, Naba K, Moon, Chang-Seong, Moore, Ronald Scott, Morello, Michael Joseph, Mukherjee, Aseet, Mulhearn, Michael James, Muller, Thomas, Murat, Pavel A, Mussini, Manuel, Nachtman, Jane Marie, Nagai, Yoshikazu, Naganoma, Junji, Nagy, Elemer, Nakano, Itsuo, Napier, Austin, Narain, Meenakshi, Nayyar, Ruchika, Neal, Homer A, Negret, Juan Pablo, Nett, Jason Michael, Neu, Christopher Carl, Neustroev, Petr V, Nguyen, Huong Thi, Nigmanov, Turgun S, Nodulman, Lawrence J, Noh, Seoyoung, Norniella Francisco, Olga, Nunnemann, Thomas P, Oakes, Louise Beth, Oh, Seog Hwan, Oh, Young-Do, Oksuzian, Iuri Artur, Okusawa, Toru, Orava, Risto Olavi, Hernandez Orduna, Jose De Jesus, Ortolan, Lorenzo, Osman, Nicolas Ahmed, Osta, Jyotsna, Pagliarone, Carmine Elvezio, Pal, Arnab, Palencia, Jose Enrique, Palni, Prabhakar, Papadimitriou, Vaia, Parashar, Neeti, Parihar, Vivek, Park, Sung Keun, Parker, William Chesluk, Partridge, Richard A, Parua, Nirmalya, Patwa, Abid, Pauletta, Giovanni, Paulini, Manfred, Paus, Christoph Maria Ernst, Penning, Bjoern, Perfilov, Maxim Anatolyevich, Peters, Reinhild Yvonne Fatima, Petridis, Konstantinos, Petrillo, Gianluca, Petroff, Pierre, Phillips, Thomas J, Piacentino, Giovanni M, Pianori, Elisabetta, Pilot, Justin Robert, Pitts, Kevin T, Plager, Charles, Pleier, Marc-Andre, Podstavkov, Vladimir M, Pondrom, Lee G, Popov, Alexey V, Poprocki, Stephen, Potamianos, Karolos Jozef, Pranko, Aliaksandr Pavlovich, Prewitt, Michelle, Price, Darren, Prokopenko, Nikolay N, Prokoshin, Fedor, Ptohos, Fotios K, Punzi, Giovanni, Qian, Jianming, Quadt, Arnulf, Quinn, Gene Breese, Ratoff, Peter N, Razumov, Ivan A, Redondo Fernández, Ignacio, Renton, Peter B, Rescigno, Marco, Rimondi, Franco, Ripp-Baudot, Isabelle, Ristori, Luciano, Rizatdinova, Flera, Robson, Aidan, Rodriguez, Tatiana Isabel, Rolli, Simona, Rominsky, Mandy Kathleen, Ronzani, Manfredi, Roser, Robert Martin, Rosner, Jonathan L, Ross, Anthony, Royon, Christophe, Rubinov, Paul Michael, Ruchti, Randal C, Ruffini, Fabrizio, Ruiz Jimeno, Alberto, Russ, James S, Rusu, Vadim Liviu, Sajot, Gerard, Sakumoto, Willis Kazuo, Sakurai, Yuki, Sanchez-Hernandez, Alberto, Sanders, Michiel P, Santi, Lorenzo, Santos, Angelo Souza, Sato, Koji, Savage, David G, Saveliev, Valeri, Savitskyi, Mykola, Savoy-Navarro, Aurore, Sawyer, HLee, Scanlon, Timothy P, Schamberger, RDean, Scheglov, Yury A, Schellman, Heidi M, Schlabach, Philip, Schmidt, Eugene E, Schwanenberger, Christian, Schwarz, Thomas A, Schwienhorst, Reinhard H, Scodellaro, Luca, Scuri, Fabrizio, Seidel, Sally C, Seiya, Yoshihiro, Sekaric, Jadranka, Semenov, Alexei, Severini, Horst, Sforza, Federico, Shabalina, Elizaveta K, Shalhout, Shalhout Zaki, Shary, Viacheslav V, Shaw, Savanna, Shchukin, Andrey A, Shears, Tara G, Shepard, Paul F, Shimojima, Makoto, Shochet, Melvyn J, Shreyber-Tecker, Irina, Simak, Vladislav J, Simonenko, Alexander V, Skubic, Patrick Louis, Slattery, Paul F, Sliwa, Krzysztof Jan, Smirnov, Dmitri V, Smith, John Rodgers, Snider, Frederick Douglas, Snow, Gregory R, Snow, Joel Mark, Snyder, Scott Stuart, Soldner-Rembold, Stefan, Song, Hao, Sonnenschein, Lars, Sorin, Maria Veronica, Soustruznik, Karel, St Denis, Richard Dante, Stancari, Michelle Dawn, Stark, Jan, Stentz, Dale James, Stoyanova, Dina A, Strauss, Michael G, Strologas, John, Sudo, Yuji, Sukhanov, Alexander I, Suslov, Igor M, Suter, Louise, Svoisky, Peter V, Takemasa, Ken-Ichi, Takeuchi, Yuji, Tang, Jian, Tecchio, Monica, Teng, Ping-Kun, Thom, Julia, Thomson, Evelyn Jean, Thukral, Vaikunth, Titov, Maxim, Toback, David A, Tokar, Stanislav, Tokmenin, Valeriy V, Tollefson, Kirsten Anne, Tomura, Tomonobu, Tonelli, Diego, Torre, Stefano, Torretta, Donatella, Totaro, Pierluigi, Trovato, Marco, Tsai, Yun-Tse, Tsybychev, Dmitri, Tuchming, Boris, Tully, Christopher George T, Ukegawa, Fumihiko, Uozumi, Satoru, Uvarov, Lev, Uvarov, Sergey L, Uzunyan, Sergey A, Van Kooten, Richard J, Van Leeuwen, Willem M, Varelas, Nikos, Varnes, Erich W, Vasilyev, Igor A, Vázquez-Valencia, Elsa Fabiola, Velev, Gueorgui, Vellidis, Konstantinos, Verkheev, Alexander Yurievich, Vernieri, Caterina, Vertogradov, Leonid S, Verzocchi, Marco, Vesterinen, Mika, Vidal Marono, Miguel, Vilanova, Didier, Vilar Cortabitarte, Rocio, Vizán Garcia, Jesus Manuel, Vogel, Marcelo, Vokac, Petr, Volpi, Guido, Wagner, Peter, Wahl, Horst D, Wallny, Rainer S, Wang, Michael HLS, Wang, Song-Ming, Warchol, Jadwiga, Waters, David S, Watts, Gordon Thomas, Wayne, Mitchell R, Weichert, Jonas, Welty-Rieger, Leah Christine, Wester, William Carl, Whiteson, Daniel O, Wicklund, Arthur Barry, Wilbur, Scott, Williams, Hugh H, Williams, Mark Richard James, Wilson, Graham Wallace, Wilson, Jonathan Samuel, Wilson, Peter James, Winer, Brian L, Wittich, Peter, Wobisch, Markus, Wolbers, Stephen A, Wolfe, Homer, Wood, Darien Robert, Wright, Thomas Roland, Wu, Xin, Wu, Zhenbin, Wyatt, Terence R, Xie, Yunhe, Yamada, Ryuji, Yamamoto, Kazuhiro, Yamato, Daisuke, Yang, Siqi, Yang, Tingjun, Yang, Un-Ki, Yang, Yu Chul, Yao, Wei-Ming, Yasuda, Takahiro, Yatsunenko, Yuriy A, Ye, Wanyu, Ye, Zhenyu, Yeh, Gong Ping, Yi, Kai, Yin, Hang, Yip, Kin, Yoh, John, Yorita, Kohei, Yoshida, Takuo, Youn, Sungwoo, Yu, Geum Bong, Yu, Intae, Yu, Jiaming, Zanetti, Anna Maria, Zeng, Yu, Zennamo, Joseph, Zhao, Tianqi Gilbert, Zhou, Bing, Zhou, Chen, Zhu, Junjie, Zielinski, Marek, Zieminska, Daria, Zivkovic, Lidija, and Zucchelli, Stefano
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1960 GeV-cms ,top: single production ,transverse energy: missing-energy ,cross section: measured ,quark: coupling ,anti-p p: colliding beams ,CKM matrix ,DZERO ,anti-p p: scattering ,CDF ,Batavia TEVATRON Coll ,dimension: 2 ,channel cross section: measured - Abstract
Physical review letters 115(15), 152003(2015). doi:10.1103/PhysRevLett.115.152003, We present the final combination of CDF and D0 measurements of cross sections for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb$^{−1}$ per experiment. The t-channel cross section is measured to be σ$_t$=2.25$_{-0.31}^{+0.29}$ pb. We also present the combinations of the two-dimensional measurements of the s- vs t-channel cross section. In addition, we give the combination of the s+t channel cross section measurement resulting in σ$_{s+t}$=3.30$_{-0.40}^{+0.52}$ pb, without assuming the standard model value for the ratio σ$_s$/σ$_t$. The resulting value of the magnitude of the top-to-bottom quark coupling is |V$_{tb}$|=1.02$_{-0.05}^{+0.06}$, corresponding to |V$_{tb}$|>0.92 at the 95% C.L., Published by APS, College Park, Md.
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- 2015
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43. Stellar kinematics and metallicities in the ultra-faint dwarf galaxy Reticulum II
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Simon, Josh D., Drlica-Wagner, Alex, Li, T. S., Nord, Brian Dennis, Geha, Marla, Bechtol, Keith, Balbinot, Eduardo, Buckley-Geer, Elizabeth, Lin, H., Marshall, Jennifer L., Santiago, Basilio Xavier, Strigari, Louis E., Wang, M., Wechsler, Risa H., Yanny, Brian, Abbott, Timothy M. C., Bauer, Anne Hollister, Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Burke, David Lyle, Capozzi, Diego, Carnero Rosell, Aurelio, Carrasco Kind, Matías, D'Andrea, Christopher B., Costa, Luiz N. da, DePoy, Darren L., Desai, S., Diehl, H. Thomas, Dodelson, Scott, Cunha, Carlos Eduardo, Estrada, Juan, Evrard, August E., Fausti Neto, Angelo, Fernandez, Enrique, Finley, David A., Flaugher, Brenna, Frieman, Joshua A., Gaztañaga, Enrique, Gerdes, David W., Gruen, Daniel, Gruendl, Robert A., Honscheid, K., James, David J., Kent, Stephen M., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Maia, Marcio Antonio Geimba, March, Marisa Cristina, Martini, Paul, Miller, Christopher J., Miquel, Ramon, Ogando, Ricardo L.C., Romer, Anita K., Roodman, Aaron, Sako, Masao, Sanchez-Alvaro, Eusebio, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Thaler, Jon J., Tucker, Douglas L., Vikram, Vinu, Walker, Alistair, Wester, William Carl, and DES Collaboration
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dwarf [Galaxies] ,abundances [Stars] ,Dark matter ,individual (Reticulum II) [Galaxies] ,Local group ,Matéria escura ,stellar content [Galaxies] ,Galaxia ,Composicao estelar ,Dinamica estelar ,Grande Nuvem de Magalhães ,Espectros estelares ,Pequena Nuvem de Magalhães - Abstract
We present Magellan/M2FS, Very Large Telescope/GIRAFFE, and Gemini South/GMOS spectroscopy of the newly discovered Milky Way satellite Reticulum II. Based on the spectra of 25 Ret II member stars selected from Dark Energy Survey imaging, we measure a mean heliocentric velocity of 62.8 0.5 km s-1 and a velocity dispersion of 3.3 0.7 km s-1. The mass-to-light ratio of Ret II within its half-light radius is 470 210 M L, demonstrating that it is a strongly dark matter-dominated system. Despite its spatial proximity to the Magellanic Clouds, the radial velocity of Ret II differs from that of the LMC and SMC by 199 and 83 km s-1, respectively, suggesting that it is not gravitationally bound to the Magellanic system. The likely member stars of Ret II span 1.3 dex in metallicity, with a dispersion of 0.28 ± 0.09 dex, and we identify several extremely metal-poor stars with [Fe/H] < -3. In combination with its luminosity, size, and ellipticity, these results confirm that Ret II is an ultra-faint dwarf galaxy. With a mean metallicity of [Fe/H] = -2.65 0.07, Ret II matches Segue 1 as the most metal-poor galaxy known. Although Ret II is the third-closest dwarf galaxy to the Milky Way, the line-of-sight integral of the dark matter density squared is log10 (J) 18.8 0.6 GeV cm = 2 -5 within 0 ◦. 2, indicating that the predicted gamma-ray flux from dark matter annihilation in Ret II is lower than that of several other dwarf galaxies.
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- 2015
44. Search for gamma-ray emission from DES dwarf spheroidal galaxy candidates with Fermi-LAT data
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Drlica-Wagner, Alex, Albert, Andrea, Bechtol, Keith, Wood, Matthew Dunseth, Strigari, Louis E., Sánchez-Conde, Miguel A., Baldini, Luca, Essig, Rouven, Cohen-Tanugi, Johann, Anderson, Brandon, Bellazzini, Ronaldo, Bloom, Elliott D., Caputo, Regina, Cecchi, Claudia, Charles, Eric Andre, Chiang, James, De Angelis, Alessandro, Funk, Stefan, Fusco, Piergiorgio, Gargano, Fabio, Giglietto, Nico, Giordano, Francesco, Guiriec, Sylvain, Gustafsson, Michael, Kuss, Michael, Loparco, Francesco, Lubrano, Pasquale, Mirabal, N., Mizuno, Tsunefumi, Morselli, Aldo, Ohsugi, Takashi, Orlando, Elena, Persic, Massimo, Raino, Silvia, Spada, Francesca Romana, Suson, Daniel J., Zaharijas, Gabrijela, Zimmer, Stephan, Abbott, Timothy M. C., Allam, Sahar S., Balbinot, Eduardo, Bauer, Anne Hollister, Benoit-Lévy, Aurélien, Bernstein, Rebecca A., Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Buckley-Geer, Elizabeth, Burke, David Lyle, Carnero Rosell, Aurelio, Castander Serentill, Francisco Javier, Covarrubias, Ricardo A., D'Andrea, Christopher B., Costa, Luiz N. da, DePoy, Darren L., Desai, S., Diehl, H. Thomas, Cunha, Carlos Eduardo, Eifler, Tim, Estrada, Juan, Evrard, August E., Fausti Neto, Angelo, Fernandez, Enrique, Finley, David A., Flaugher, Brenna, Frieman, Joshua A., Gaztañaga, Enrique, Gerdes, David W., Gruen, Daniel, Gruendl, Robert A., Gutierrez, Gaston R., Honscheid, K., Jain, Bhuvnesh, James, David J., Jeltema, Tesla E., Kent, Stephen M., Kron, Richard G., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Li, T. S., Luque Canaza, Elmer Fidel, Maia, Marcio Antonio Geimba, Makler, Martín, March, Marisa Cristina, Marshall, Jennifer L., Martini, Paul, Merritt, K. Wyatt, Miller, Christopher J., Miquel, Ramon, Mohr, Joseph J., Neilsen, Eric H., Nord, Brian Dennis, Ogando, Ricardo L.C., Peoples, John, Petravick, Donald L., Pieres, Adriano, Plazas Malagón, Andrés Alejandro, Queiroz, Anna Bárbara de Andrade, Romer, Anita K., Roodman, Aaron, Rykoff, Eli, Sako, Masao, Sanchez-Alvaro, Eusebio, Santiago, Basilio Xavier, Scarpine, Victor Emanuel, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Thaler, Jon J., Thomas, D., Tucker, Douglas L., Walker, Alistair, Wechsler, Risa H., Wester, William Carl, Williams, P., Yanny, Brian, Zuntz, J., Fermi LAT Collaboration, and DES Collaboration
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dwarf [Galaxies] ,galaxies [Gamma rays] ,Leptons pesados ,Dark matter ,Quarks ,Local group ,Matéria escura ,Galaxia - Abstract
Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, eight new dSph candidates were discovered using the first year of data from the Dark Energy Survey (DES). We searched for gamma-ray emission coincident with the positions of these new objects in six years of Fermi Large Area Telescope data. We found no significant excesses of gamma-ray emission. Under the assumption that the DES candidates are dSphs with DM halo properties similar to the known dSphs, we computed individual and combined limits on the velocity-averaged DM annihilation cross section for these new targets. If the estimated DM content of these dSph candidates is confirmed, they will constrain the annihilation cross section to lie below the thermal relic cross section for DM particles with masses 20 GeV annihilating via the bb¯ or τ+τ− channels.
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- 2015
45. Eight ultra-faint galaxy candidates discovered in year two the Dark Energy Survey
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Drlica-Wagner, Alex, Bechtol, Keith, Rykoff, Eli, Luque Canaza, Elmer Fidel, Queiroz, Anna Bárbara de Andrade, Mao, Yao-Yuan, Wechsler, Risa H., Simon, Josh D., Santiago, Basilio Xavier, Yanny, Brian, Balbinot, Eduardo, Dodelson, Scott, Fausti Neto, Angelo, James, David J., Li, T. S., Maia, Marcio Antonio Geimba, Marshall, Jennifer L., Pieres, Adriano, Stringer, Katelyn M., Walker, Alistair, Abbott, Timothy M. C., Abdalla, Filipe B., Allam, Sahar S., Benoit-Lévy, Aurélien, Bernstein, Rebecca A., Bernstein, Gary M., Bertin, Emmanuel, Brooks, D., Buckley-Geer, Elizabeth, Burke, David Lyle, Carnero Rosell, Aurelio, Carrasco Kind, Matías, Carretero Palacios, Jorge, Crocce, Martin, Costa, Luiz N. da, Desai, S., Diehl, H. Thomas, Dietrich, Jörg P., Doel, Peter, Eifler, Tim, Evrard, August E., Flaugher, Brenna, Fosalba Vela, Pablo, Frieman, Joshua A., Gaztañaga, Enrique, Gerdes, David W., Gruen, Daniel, Gruendl, Robert A., Gutierrez, Gaston R., Honscheid, K., Kuehn, Kyler, Kuropatkin, Nikolay P., Lahav, Ofer, Miquel, Ramon, Nord, Brian Dennis, Ogando, Ricardo L.C., Plazas Malagón, Andrés Alejandro, Reil, Kevin, Roodman, Aaron, Sako, Masao, Sanchez-Alvaro, Eusebio, Scarpine, Victor Emanuel, Schubnell, Michael, Sevilla Noarbe, Ignacio, Smith, Robert Christopher, Soares-Santos, Marcelle, Sobreira, Flávia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Tucker, Douglas L., Vikram, Vinu, Wester, William Carl, Zhang, Yuanyuan, Zuntz, J., and DES Collaboration
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dwarf [Galaxies] ,Via láctea ,Local group ,Galáxias - Abstract
We report the discovery of eight new ultra-faint dwarf galaxy candidates in the second year of optical imaging data from the Dark Energy Survey (DES). Six of these candidates are detected at high confidence, while two lowerconfidence candidates are identified in regions of non-uniform survey coverage. The new stellar systems are found by three independent automated search techniques and are identified as overdensities of stars, consistent with the isochrone and luminosity function of an old and metal-poor simple stellar population. The new systems are faint (MV > −4.7mag) and span a range of physical sizes (17 pc < r1/2 < 181 pc) and heliocentric distances (25 kpc < De < 214 kpc). All of the new systems have central surface brightnesses consistent with known ultrafaint dwarf galaxies (μ 27.5mag arcsec−2). Roughly half of the DES candidates are more distant, less luminous, and/or have lower surface brightnesses than previously known Milky Way satellite galaxies. Most of the candidates are found in the southern part of the DES footprint close to the Magellanic Clouds. We find that the DES data alone exclude (p < 10−3) a spatially isotropic distribution of Milky Way satellites and that the observed distribution can be well, though not uniquely, described by an association between several of the DES satellites and the Magellanic system. Our model predicts that the full sky may hold ∼100 ultra-faint galaxies with physical properties comparable to the DES satellites and that 20%–30% of these would be spatially associated with the Magellanic Clouds.
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- 2015
46. Tuberculosis in Pediatric Antiretroviral Therapy Programs in Low- and Middle-Income Countries: Diagnosis and Screening Practices
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Ballif, Marie, Renner, Lorna, Claude Dusingize, Jean, Leroy, Valeriane, Ayaya, Samuel, Wools-Kaloustian, Kara, Cortes, Claudia P., McGowan, Catherine C., Graber, Claire, Mandalakas, Anna M., Mofenson, Lynne M., Egger, Matthias, Kumara Wati, Ketut Dewi, Nallusamy, Revathy, Reubenson, Gary, Davies, Mary-Ann, Fenner, Lukas, Ajayi, Samuel, Anastos, Kathryn, Bashi, Jules, Bishai, William, Boulle, Andrew, Braitstein, Paula, Carriquiry, Gabriela, Carter, Jane E., Cegielski, Peter, Chimbetete, Cleophas, Conrad, Joseph, Cortes, Claudia, Diero, Lameck, Duda, Stephany, Durier, Nicolas, Dusingize, Jean Claude, Eboua, Tanoh F., Gasser, Adrian, Geng, Elvin, Gnokori, Joachim Charles, Hardwicke, Laura, Hoffmann, Chris, Huebner, Robin, Kancheya, Nzali, Kiertiburanakul, Sasisopin, Kim, Peter, Lameck, Diero, Leroy, Valériane, Lewden, Charlotte, Lindegren, Mary Lou, Mandalakas, Anna, Maskew, Mhairi, McKaig, Rosemary, Mofenson, Lynne, Mpoudi-Etame, Mireille, Okwara, Benson, Phiri, Sam, Prasitsuebsai, Wasana, Petit, April, Prozesky, Hans, Reid, Stewart E., Sohn, Annette, Sterling, Timothy, Vo, Quynh, Walker, Dana, Wehbe, Firas, Wejse, Christian, Wester, William, Williams, Carlie, Wood, Robin, Yao, Zhang, Yunihastuti, Evy, Abrams, Elaine, Ananworanich, Jintanat, Azondekon, Alain, Frieda Behets, Melanie Bacon, Cahn, Pedro, Cesar, Carina, Ciaranello, Andrea, Dabis, François, Edmonds, Andrew, Feinstein, Lydia, Hazra, Rohan, Hoover, Don, Keiser, Olivia, Magneres, Maria Cecilia, McGowan, Catherine, Messerschmidt, Liesl, Biribonwoha, Harriet Nuwagaba, Sharp, Gerald, Vreeman, Rachel, Worrell, Carol, Yiannoutsos, Constantine, Zwickl, Beth, and Wejse, Christian
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Pediatrics ,medicine.medical_specialty ,Tuberculosis ,Asia ,Anti-HIV Agents ,Human immunodeficiency virus (HIV) ,HIV Infections ,Diagnostic tools ,medicine.disease_cause ,Active tb ,medicine ,Humans ,Child ,610 Medicine & health ,Developing Countries ,Poverty ,Africa South of the Sahara ,Microscopy ,medicine.diagnostic_test ,business.industry ,Sputum ,Infant ,General Medicine ,Mycobacterium tuberculosis ,medicine.disease ,Antiretroviral therapy ,Infectious Diseases ,Low and middle income countries ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Radiography, Thoracic ,medicine.symptom ,Americas ,Chest radiograph ,business ,Original Articles and Commentaries ,360 Social problems & social services - Abstract
BACKGROUND: The global burden of childhood tuberculosis (TB) is estimated to be 0.5 million new cases per year. Human immunodeficiency virus (HIV)-infected children are at high risk for TB. Diagnosis of TB in HIV-infected children remains a major challenge.METHODS: We describe TB diagnosis and screening practices of pediatric antiretroviral treatment (ART) programs in Africa, Asia, the Caribbean, and Central and South America. We used web-based questionnaires to collect data on ART programs and patients seen from March to July 2012. Forty-three ART programs treating children in 23 countries participated in the study.RESULTS: Sputum microscopy and chest Radiograph were available at all programs, mycobacterial culture in 40 (93%) sites, gastric aspiration in 27 (63%), induced sputum in 23 (54%), and Xpert MTB/RIF in 16 (37%) sites. Screening practices to exclude active TB before starting ART included contact history in 41 sites (84%), symptom screening in 38 (88%), and chest Radiograph in 34 sites (79%). The use of diagnostic tools was examined among 146 children diagnosed with TB during the study period. Chest Radiograph was used in 125 (86%) children, sputum microscopy in 76 (52%), induced sputum microscopy in 38 (26%), gastric aspirate microscopy in 35 (24%), culture in 25 (17%), and Xpert MTB/RIF in 11 (8%) children.CONCLUSIONS: Induced sputum and Xpert MTB/RIF were infrequently available to diagnose childhood TB, and screening was largely based on symptom identification. There is an urgent need to improve the capacity of ART programs in low- and middle-income countries to exclude and diagnose TB in HIV-infected children.
- Published
- 2015
- Full Text
- View/download PDF
47. Charles B. Mutter, M.D., ABMH
- Author
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Wester, William C., primary
- Published
- 2016
- Full Text
- View/download PDF
48. GammeV: laser experiments at Fermilab for WISPs and other effects
- Author
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Wester, William and GammeV Collaboration
- Subjects
Physics - Abstract
Contribution to Proceedings, Proc. of Patras Workshop on Axions, WIMPs and WISPs, 68 - 71; DESY-PROC-2011-04; ISSN 1435-8077
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- 2011
- Full Text
- View/download PDF
49. GammeV: Search for WISPs at Fermilab
- Author
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Wester, William, GammeV Collaboration, and GammeV-CHASE Collaboration
- Published
- 2010
- Full Text
- View/download PDF
50. GammeV: Fermilab axion-like particle photon regeneration results
- Author
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Wester, William and GammeV Collaboration
- Subjects
Physics - Abstract
Contribution to Proceedings, Proc. of PATRAS08; DESY-PROC-2008-02; ISSN 1435-8077
- Published
- 2009
- Full Text
- View/download PDF
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