Browsing by Author "González Gaitán, Santiago"

Now showing items 1-18 of 18

    • Analysis of blueshifted emission peaks in Type II supernovae 
      Anderson, Joseph P.; Dessart, L.; Gutiérrez, Claudia P.; Hamuy Wackenhut, Mario; Morrell, N. I.; Phillips, M. M.; Folatelli, Gastón; Stritzinger, M. D.; Freedman, W. L.; González Gaitán, Santiago; McCarthy, P.; Suntzeff, Nicholas B.; Thomas-Osip, J. (Royal Astronomical Society, 2014-06-11)
      In classical P-Cygni profiles, theory predicts emission to peak at zero rest velocity. However, supernova spectra exhibit emission that is generally blueshifted. While this characteristic has been reported in many SNe, ...
    • Asteroids in the high cadence transient survey 
      Peña, J.; Fuentes González, César; Forster, Francisco; Maureira, Juan Carlos; San Martín, J.; Littin, J.; Huijse Heise, Pablo Andrés; Cabrera Vives, Guillermo; Estévez Valencia, Pablo; Galbany, Lluis; González Gaitán, Santiago; Martínez, J.; De Jaeger, Thomas; Hamuy Wackenhut, Mario (IOP Publishing Ltd, 2018)
      We report on the serendipitous observations of solar system objects imaged during the High cadence Transient Survey 2014 observation campaign. Data from this high-cadence wide-field survey was originally analyzed for finding ...
    • A comparative study of Type II-P and II-L supernova rise times as exemplified by the case of LSQ13cuw 
      Gall, H.; Polshaw, J.; Kotak, R.; Jerkstrand, A.; Leibundgut, B.; Rabinowitz, D.; Sollerman, J.; Sullivan, M.; Smartt, S.; Anderson, J.; Benetti, S.; Baltay, C.; Feindt, U.; Fraser, M.; González Gaitán, Santiago; Inserra, C.; Maguire, K.; McKinnon, R.; Valenti, S.; Young, D. (EDP Sciences, 2015)
      We report on our findings based on the analysis of observations of the Type II-L supernova LSQ13cuw within the framework of currently accepted physical predictions of core-collapse supernova explosions. LSQ13cuw was ...
    • Discovery of distant RR Lyrae Stars in the Milky Way using DECam 
      Medina, Gustavo E.; Muñoz Vidal, Ricardo Rodrigo; Katherina Vivas, A.; Carlin, Jeffrey L.; Forster, Francisco; Martínez, Jorge; Galbany, Lluis; González Gaitán, Santiago; Hamuy Wackenhut, Mario; De Jaeger, Thomas; Maureira, Juan Carlos; San Martín Aristegui, Jaime (IOP Publishing Ltd, 2018)
      We report the discovery of distant RR Lyrae stars, including the most distant known in the Milky Way, using data taken in the g-band with the Dark Energy Camera as part of the High cadence Transient Survey (HiTS; 2014 ...
    • Evidence for asymmetric distribution of circumstellar material around type Ia supernovae 
      Förster, Francisco; González Gaitán, Santiago; Anderson, Joseph; Marchi, Sebastián; Gutiérrez, Claudia P.; Hamuy Wackenhut, Mario; Pignata Libralato, Giuliano; Cartier Ugarte, Regis (2012-08-01)
      We study the properties of low-velocity material in the line of sight toward nearby Type Ia supernovae (SNe Ia) that have measured late phase nebular velocity shifts (vneb), thought to be an environment-independent ...
    • Hα Spectral Diversity of Type II Supernovae: Correlations with Photometric Properties 
      Gutiérrez, Claudia P.; Anderson, Joseph P.; Hamuy Wackenhut, Mario; González Gaitán, Santiago; Folatelli, Gastón; Morrell, Nidia; Stritzinger, Maximilian D.; Phillips, Mark M.; MoroMartín, Amaya; Suntzeff, Nicholas B.; homas-Osip, Joanna T. (The American Astronomical Society, 2014-05-10)
      We present a spectroscopic analysis of the Hα profiles of hydrogen-rich Type II supernovae. A total of 52 Type II supernovae having well-sampled optical light curves and spectral sequences were analyzed. Concentrating on ...
    • Nebular phase observations of the type-Ib supernova iPTF13bvn favour a binary progenitor 
      Kuncarayakti, Hanindyo; Maeda, Keiichi; Bersten, Melina Cecilia; Folatelli, Gastón; Morrell, Nidia; Hsiao, Eric; González Gaitán, Santiago; Anderson, J. P.; Hamuy Wackenhut, Mario; De Jaeger, Thomas; Gutiérrez, C. P.; Kawabata, K. S. (EDP Sciences, 2015)
      Aims. We present and analyse late-time observations of the Type-Ib supernova with possible pre-supernova progenitor detection, iPTF13bvn, which were done similar to 300 days after the explosion. We discuss them in the ...
    • Observed type II supernova colours from the carnegie supernova project-I 
      De Jaeger, Thomas; Anderson, J. P.; Galbany, Lluis; González Gaitán, Santiago; Hamuy Wackenhut, Mario; Phillips, M. M.; Stritzinger, M. D.; Contreras, C.; Folatelli, Gastón; Gutiérrez, C. P.; Hsiao, E. Y.; Morrell, N.; Suntzeff, Nicholas B.; Dessart, L.; Filippenko, A. V. (Oxford University Press, 2018-06)
      We present a study of observed Type II supernova (SN II) colours using optical/near-infrared photometric data from the Carnegie Supernovae Project-I. We analyse four colours (B - V, u - g, g - r, and g - Y) and find that ...
    • On the environments of Type Ia supernovae within host galaxies 
      Anderson, J. P.; James, P. A.; Förster Burón, Francisco; González Gaitán, Santiago; Habergham, Stacey; Hamuy Wackenhut, Mario; Lyman, D. (2015)
      We present constraints on Type Ia supernovae (SNe Ia) progenitors through an analysis of the environments found at the explosion sites of 102 events within star-forming host galaxies. Hα and Galaxy Evolution Explorer ...
    • ON THE LIRA LAW AND THE NATURE OF EXTINCTION TOWARD TYPE Ia SUPERNOVAE 
      Förster, Francisco; González Gaitán, Santiago; Folatelli, Gastón; Morrell, Nidia (The American Astronomical Society, 2013-07-20)
      We have studied the relation between the color evolution of Type Ia supernovae (SNe Ia) from maximum light to the Lira law regime and the presence of narrow absorption features. Based on a nearby sample of 89 SNe Ia, ...
    • PESSTO: survey description and products from the first data release by the Public ESO Spectroscopic Survey ... 
      Smartt, S. J.; Valenti, S.; Fraser, M.; Inserra, C.; Young, D. R.; Sullivan, M.; Pastorello, A.; Benetti, S.; Gal-Yam, A.; Knapic, C.; Molinaro, M.; Smareglia, R.; Smith, K.W.; Taubenberger, S.; Yaron, O.; Anderson, J. P.; Ashall, C.; Balland, C.; Baltay, C.; Barbarino, C.; Bauer, Franz Erik; Baumont, S.; Bersier, D.; Blagorodnova, N.; Bongard, S.; Botticella, M.-T.; Bufano, F.; Bulla, M.; Cappellaro, E.; Campbell, H.; Cellier Holzem, F.; Chen, T. W.; Childress, M. J.; Clocchiatti, A.; Contreras, C.; Dall’Ora, M.; Danziger, J.; De Jaeger, Thomas; De Cia, A.; Della Valle, M.; Dennefeld, M.; Elias Rosa, N.; Elman, N.; Feindt, U.; Fleury, M.; Gall, E.; González Gaitán, Santiago; Galbany, Lluis; Morales Garoffolo, A.; Greggio, L.; Guillou, L. L.; Hachinger, S.; Hadjiyska, E.; Hage, P. E.; Hillebrandt, W.; Hodgkin, S.; Hsiao, E. Y.; James, P. A.; Jerkstrand, A.; Kangas, T.; Kankare, E.; Kotak, R.; Kromer, M.; Kuncarayakti, H.; Leloudas, G.; Lundqvist, P.; Lyman, J. D.; Hook, I. M.; Maguire, K.; Manulis, I.; Margheim, S.; Mattila, S.; Maund, J. R.; Mazzali, P.; McCrum, M.; McKinnon, R.; Moreno Raya, M. E.; Nicholl, M.; Nugent, P. E.; Pain, R.; Pignata Libralato, Giuliano; Phillips, M. M.; Polshaw, J.; Pumo, M. L.; Rabinowitz, D.; Reilly, E.; Romero Cañizales, C.; Scalzo, R.; Schmidt, B.; Schulze, Steve; Sim, S. A.; Sollerman, J.; Taddia, F.; Tartaglia, L.; Terreran, G.; Tomasella, L.; Turatto, M.; Walker, E.; Walton, N. A.; Wyrzykowski, L.; Yuan, F.; Zampieri, L. (EDP Sciences, 2015)
      Context. The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. PESSTO classifies transients from publicly available sources and ...
    • The rise-time of Type II supernovae 
      González Gaitán, Santiago; Tominaga, N.; Molina, J.; Galbany, Lluis; Bufano, Filomena; Anderson, Joseph P.; Gutierrez, C.; Förster, F.; Pignata Libralato, Giuliano; Bersten, Melina; Howell, D. A.; Sullivan, M.; Carlberg, R.; De Jaeger, Thomas; Hamuy Wackenhut, Mario; Baklanov, P. V.; Blinnikov, S. I. (Oxford University Press, 2015)
      We investigate the early-time light curves of a large sample of 223 Type II supernovae (SNe II) from the Sloan Digital Sky Survey and the Supernova Legacy Survey. Having a cadence of a few days and sufficient non-detections ...
    • Searching for light echoes due to circumstellar matter in SNe la Spectra 
      Marino, Sebastián; González Gaitán, Santiago; Förster, Francisco; Folatelli, Gastón; Hamuy Wackenhut, Mario; Hsiao, Eric (The American Astronomical Society, 2015)
      We present an analytical model for light echoes (LEs) coming from circumstellar material (CSM) around Type Ia Supernovae (SNe Ia). Using this model we find two spectral signatures at 4100 angstrom and 6200 angstrom that ...
    • Serendipitous discovery of RR lyrae stars in the leo v ultra-faint galaxy 
      Medina, Gustavo E.; Muñoz Vidal, Ricardo Rodrigo; Vivas, A. Katherina; Förster, Francisco; Carlin, Jeffrey L.; Martínez, Jorge; Galbany, Lluis; González Gaitán, Santiago; Hamuy Wackenhut, Mario; Jaeger, Thomas De; Maureira, Juan Carlos; San Martín, Jaime (Institute of Physics, 2017)
      During the analysis of RR Lyrae stars (RRLs) discovered in the High Cadence Transient Survey (HiTS) taken with the Dark Energy Camera at the 4 m telescope at Cerro Tololo Inter-American Observatory, we found a group of ...
    • SN 2011A: A Low-Luminosity Interacting Transient With A Double Plateau And Strong Sodium Absorption 
      De Jaeger, Thomas; Anderson, J. P.; Pignata Libralato, Giuliano; Hamuy Wackenhut, Mario; Kankare, E.; Stritzinger, M. D.; Benetti, S.; Bufano, Filomena; Elias-Rosa, Nancy; Folatelli, Gastón; Forster, Francisco; González Gaitán, Santiago; Gutiérrez, C. P.; Inserra, C.; Kotak, R.; Lira Teillery, Paulina; Morrell, N.; Taddia, F.; Tomasella, L. (IOP Publisihing, 2015)
      We present optical photometry and spectroscopy of the optical transient SN 2011A. Our data span 140 days after discovery including BVRI u'g'r'i'z' photometry and 11 epochs of optical spectroscopy. Originally classified as ...
    • A statistical analysis of circumstellar material in Type Ia supernovae 
      Maguire, K.; Sullivan, M.; Patat, F.; Gal-Yam, A.; Hook, I. M.; Dhawan, S.; Howell, D. A.; Mazzali, P.; Nugent, P. E.; Pan, Y. C.; Podsiadlowski, P.; Simon, J. D.; Sternberg, A.; Valenti, S.; Baltay, C.; Bersier, D.; Blagorodnova, N.; Chen, T. W.; Ellman, N.; Feindt, U.; Förster, Francisco; Fraser, M.; González Gaitán, Santiago; Graham, M. L.; Gutiérrez, C.; Hachinger, S.; Hadjiyska, E.; Inserra, C.; Knapic, C.; Laher, R. R.; Leloudas, G.; Margheim, S.; McKinnon, R.; Molinaro, M.; Morrell, N.; Ofek, E. O.; Rabinowitz, D.; Rest, A.; Sand, D.; Smareglia, R.; Smartt, S. J.; Taddia, F.; Walker, E. S.; Walton, N. A.; Young, D. R. (Oxford University Press, Royal Astronomical Society, 2013)
      A key tracer of the elusive progenitor systems of Type Ia supernovae (SNe Ia) is the detection of narrow blueshifted time-varying Na I D absorption lines, interpreted as evidence of circumstellar material surrounding the ...
    • The high cadence transient survey (HITS). Compilation and characterization of light–curve catalogs 
      Martínez Palomera, Jorge; Forster, Francisco; Protopapas, Pavlos; Maureira, Juan Carlos; Lira Teillery, Paulina; Cabrera Vives, Guillermo; Huijse Heise, Pablo Andrés; Galbany, Lluis; De Jaeger, Thomas; González Gaitán, Santiago; Medina, Gustavo; Pignata Libralato, Giuliano; San Martín Aristegui, Jaime; Hamuy Wackenhut, Mario; Muñoz Vidal, Ricardo Rodrigo (2018)
      The High Cadence Transient Survey (HiTS) aims to discover and study transient objects with characteristic timescales between hours and days, such as pulsating, eclipsing and exploding stars. This survey represents a ...
    • UBVRIz Light Curves of 51 Type II Supernovae 
      Galbany, Lluis; Hamuy Wackenhut, Mario; Phillips, Mark M.; Suntzeff, Nicholas B.; Maza Sancho, José; De Jaeger, Thomas; Moraga, Tania; González Gaitán, Santiago; Krisciunas, Kevin; Morrell, Nidia; Thomas Osip, Joanna; Krzeminski, Wojtek; Gonzalez, Luis; Antezana, Roberto; Wishnjewski, Marina; McCarthy, Patrick; Anderson, Joseph; Gutierrez, Claudia; Stritzinger, Maximilian; Folatelli, Gastón; Anguita, Claudio; Galaz, Gaspar, 1967-; Green, Elisabeth; Impey, Chris; Kim, Yong-Cheol; Kirhakos, Sofia; Malkan, Mathew; Mulchaey, John; Phillips, Andrew; Pizzella, Alessandro; Prosser, Charles; Schmidt, Brian; Schommer, Robert; Sherry, William; Strolger, Louis; Wells, Lisa; Williger, Gerard (OP PUBLISHING, 2016)
      We present a compilation of UBVRIz light curves of 51 type II supernovae discovered during the course of four different surveys during 1986-2003: the Cerro Tololo Supernova Survey, the Calan/Tololo Supernova Program (C&T), ...