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5 results on '"Covarrubias, R."'

1. ERRATUM: “AUTOMATED TRANSIENT IDENTIFICATION IN THE DARK ENERGY SURVEY” (2015, AJ, 150, 82)

Author

Goldstein, DA, D’Andrea, CB, Fischer, JA, Foley, RJ, Gupta, RR, Kessler, R, Kim, AG, Nichol, RC, Nugent, PE, Papadopoulos, A, Sako, M, Smith, M, Sullivan, M, Thomas, RC, Wester, W, Wolf, RC, Abdalla, FB, Banerji, M, Benoit-Lévy, A, Bertin, E, Brooks, D, Rosell, A Carnero, Castander, FJ, da Costa, LN, Covarrubias, R, DePoy, DL, Desai, S, Diehl, HT, Doel, P, Eifler, TF, Neto, A Fausti, Finley, DA, Flaugher, B, Fosalba, P, Frieman, J, Gerdes, D, Gruen, D, Gruendl, RA, James, D, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Maia, MAG, Makler, M, March, M, Marshall, JL, Martini, P, Merritt, KW, Miquel, R, Nord, B, Ogando, R, Plazas, AA, Romer, AK, Roodman, A, Sanchez, E, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thaler, J, and Walker, AR

Subjects
Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Published
2015

2. AUTOMATED TRANSIENT IDENTIFICATION IN THE DARK ENERGY SURVEY

Author

Goldstein, DA, D’Andrea, CB, Fischer, JA, Foley, RJ, Gupta, RR, Kessler, R, Kim, AG, Nichol, RC, Nugent, PE, Papadopoulos, A, Sako, M, Smith, M, Sullivan, M, Thomas, RC, Wester, W, Wolf, RC, Abdalla, FB, Banerji, M, Benoit-Lévy, A, Bertin, E, Brooks, D, Rosell, A Carnero, Castander, FJ, da Costa, LN, Covarrubias, R, DePoy, DL, Desai, S, Diehl, HT, Doel, P, Eifler, TF, Neto, A Fausti, Finley, DA, Flaugher, B, Fosalba, P, Frieman, J, Gerdes, D, Gruen, D, Gruendl, RA, James, D, Kuehn, K, Kuropatkin, N, Lahav, O, Li, TS, Maia, MAG, Makler, M, March, M, Marshall, JL, Martini, P, Merritt, KW, Miquel, R, Nord, B, Ogando, R, Plazas, AA, Romer, AK, Roodman, A, Sanchez, E, Scarpine, V, Schubnell, M, Sevilla-Noarbe, I, Smith, RC, Soares-Santos, M, Sobreira, F, Suchyta, E, Swanson, MEC, Tarle, G, Thaler, J, and Walker, AR

Subjects
Particle and High Energy Physics, Astronomical Sciences, Physical Sciences, Bioengineering, Affordable and Clean Energy, methods: data analysis, methods: statistical, supernovae: general, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Abstract

We describe an algorithm for identifying point-source transients and moving objects on reference-subtracted optical images containing artifacts of processing and instrumentation. The algorithm makes use of the supervised machine learning technique known as Random Forest. We present results from its use in the Dark Energy Survey Supernova program (DES-SN), where it was trained using a sample of 898,963 signal and background events generated by the transient detection pipeline. After reprocessing the data collected during the first DES-SN observing season (2013 September through 2014 February) using the algorithm, the number of transient candidates eligible for human scanning decreased by a factor of 13.4, while only 1.0% of the artificial Type Ia supernovae (SNe) injected into search images to monitor survey efficiency were lost, most of which were very faint events. Here we characterize the algorithm's performance in detail, and we discuss how it can inform pipeline design decisions for future time-domain imaging surveys, such as the Large Synoptic Survey Telescope and the Zwicky Transient Facility. An implementation of the algorithm and the training data used in this paper are available at http://portal.nserc.gov/project/dessn/autoscan.

Published
2015

3. The Type Ia Supernova 1999aw: A Probable 1999aa-like Event in a Low-Luminosity Host Galaxy

Author

Strolger, L-G, Smith, RC, Suntzeff, NB, Phillips, MM, Aldering, G, Nugent, P, Knop, R, Perlmutter, S, Schommer, RA, Ho, LC, Hamuy, M, Krisciunas, K, Germany, LM, Covarrubias, R, Candia, P, Athey, A, Blanc, G, Bonacic, A, Bowers, T, Conley, A, Dahlén, T, Freedman, W, Galaz, G, Gates, E, Goldhaber, G, Goobar, A, Groom, D, Hook, IM, Marzke, R, Mateo, M, McCarthy, P, Méndez, J, Muena, C, Persson, SE, Quimby, R, Roth, M, Ruiz-Lapuente, P, Seguel, J, Szentgyorgyi, A, von Braun, K, Wood-Vasey, WM, and York, T

Subjects
Astronomical Sciences, Physical Sciences, supernovae : general, supernovae : individual, astro-ph, Astronomical and Space Sciences, Astronomy & Astrophysics, Astronomical sciences, Particle and high energy physics
Abstract

SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search project. This luminous, slow-declining [Δm 15(B) = 0.81 ± 0.03] Type Ia supernova was noteworthy in at least two respects. First, it occurred in an extremely low luminosity host galaxy that was not visible in the template images nor in initial subsequent deep imaging. Second, the photometric and spectral properties of this supernova indicate that it very likely was similar to the subclass of Type Ia supernovae whose prototype is SN 1999aa. This paper presents the BVRI and J SHKS light curves of SN 1999aw (through ∼100 days past maximum light), as well as several epochs of optical spectra. From these data, we calculate the bolometric light curve and give estimates of the luminosity at maximum light and the initial 56Ni mass. In addition, we present deep BVI images obtained recently with the Baade 6.5 m telescope at Las Campanas Observatory that reveal the remarkably low-luminosity host galaxy.

Published
2002

4. Optical Light Curve of the Type I[CLC]a[/CLC] Supernova 1998[CLC]bu[/CLC] in M96 and the Supernova Calibration of the Hubble Constant

Author

Suntzeff, Nicholas B., primary, Phillips, M. M., additional, Covarrubias, R., additional, Navarrete, M., additional, Pérez, J. J., additional, Guerra, A., additional, Acevedo, M. T., additional, Doyle, Laurance R., additional, Harrison, Thomas, additional, Kane, Stephen, additional, Long, Knox S., additional, Maza, José, additional, Miller, Scott, additional, Piatti, Andrés E., additional, Clariá, Juan J., additional, Ahumada, Andrea V., additional, Pritzl, Barton, additional, and Winkler, P. Frank, additional

Published
1999
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5. BVRI Light Curves for 29 Type IA Supernovae

Author

Hamuy, M., primary, Phillips, M. M., additional, Suntzeff, N. B., additional, Schommer, R. A., additional, Maza, J., additional, Antezan, A. R., additional, Wischnjewsky, M., additional, Valladares, G., additional, Muena, C., additional, Gonzales, L. E., additional, Aviles, R., additional, Wells, L. A., additional, Smith, R. C., additional, Navarrete, M., additional, Covarrubias, R., additional, Williger, G. M., additional, Walker, A. R., additional, Layden, A. C., additional, Elias, J. H., additional, Baldwin, J. A., additional, Hernandez, M., additional, Tirado, H., additional, Ugarte, P., additional, Elston, R., additional, Saavedra, N., additional, Barrientos, F., additional, Costa, E., additional, Lira, P., additional, Ruiz, M. T., additional, Anguita, C., additional, Gomez, X., additional, Ortiz, P., additional, della Valle, M., additional, Danziger, J., additional, Storm, J., additional, Kim, Y.-C., additional, Bailyn, C., additional, Rubenstein, E. P., additional, Tucker, D., additional, Cersosimo, S., additional, Mendez, R. A., additional, Siciliano, L., additional, Sherry, W., additional, Chaboyer, B., additional, Koopmann, R. A., additional, Geisler, D., additional, Sarajedini, A., additional, Dey, A., additional, Tyson, N., additional, Rich, R. M., additional, Gal, R., additional, Lamontagne, R., additional, Caldwell, N., additional, Guhathakurta, P., additional, Phillips, A. C., additional, Szkody, P., additional, Prosser, C., additional, Ho, L. C., additional, McMahan, R., additional, Baggley, G., additional, Cheng, K.-P., additional, Havlen, R., additional, Wakamatsu, K., additional, Janes, K., additional, Malkan, M., additional, Baganoff, F., additional, Seitzer, P., additional, Shara, M., additional, Sturch, C., additional, Hesser, J., additional, Hartig, A. N. P., additional, Hughes, J., additional, Welch, D., additional, Williams, T. B., additional, Ferguson, H., additional, Francis, P. J., additional, French, L., additional, Bolte, M., additional, Roth, J., additional, Odewahn, S., additional, Howell, S., additional, and Krzeminski, W., additional

Published
1996
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