Now showing items 1-19 of 19

    • An asymmetric explosion as the origin of spectral evolution diversity in type Ia supernovae 

      Maeda, K.; Benetti, S.; Stritzinger, M.; Röpke, F. K.; Folatelli, Gastón; Sollerman, J.; Taubenberger, S.; Nomoto, K.; Leloudas, G.; Hamuy Wackenhut, Mario; Tanaka, M.; Mazzali, Paolo; Elias Rosa, N. (2010-07-01)
      Type Ia supernovae forman observationally uniform class of stellar explosions, in that more luminous objects have smaller declinerates 1. This one-parameter behaviour allows type Ia supernovae to be calibrated as ...
    • Characteristic velocities of stripped-envelope core-collapse supernova cores 

      Maurer, J. I.; Mazzali, Paolo; Deng, J.; Filippenko, Alexei V.; Hamuy Wackenhut, Mario; Kirshner, Robert P.; Matheson, Thomas; Modjaz, Maryam; Pian, E.; Stritzinger, M.; Taubenberger, S.; Valenti, S. (2010)
      The velocity of the inner ejecta of stripped-envelope core-collapse supernovae (CC-SNe) is studied by means of an analysis of their nebular spectra. Stripped-envelope CC-SNe are the result of the explosion of bare cores ...
    • Effects of the explosion asymmetry and viewing angle on the Type Ia supernova colour and luminosity calibration 

      Maeda, Keiichi; Leloudas, Giorgos; Taubenberger, Stefan; Stritzinger, Maximilian; Sollerman, Jesper; Elias Rosa, Nancy; Benetti, Stefano; Hamuy Wackenhut, Mario; Folatelli, Gastón; Mazzali, Paolo (2011)
      Phenomenological relations exist between the peak luminosity and other observables of type Ia supernovae (SNe Ia) that allow one to standardize their peak luminosities. However, several issues are yet to be clarified: ...
    • Environment-derived constraints on the progenitors of low-luminosity Type I supernovae 

      Lyman, J. D.; James, P. A.; Perets, Hagai B.; Anderson, J. P.; Gal Yam, Avishay; Mazzali, Paolo; Percival, S. M. (Oxford University Press on behalf of the Royal Astronomical Society, 2013)
      We present a study of the properties of the host galaxies of unusual transient objects of two types, both being subluminous compared with the major classes of supernovae. Those of one type exhibit unusually strong calcium ...
    • A faint type of supernova from a white dwarf with a helium-rich companion 

      Perets, Hagai B.; Gal Yam, Avishay; Mazzali, Paolo; Arnett, D.; Kagan, D.; Filippenko, Alexei V.; Li, Weidong; Arcavi, I.; Cenko, S. Bradley; Fox, D. B.; Leonard, D. C.; Moon, D.-S.; Sand, D. J.; Soderberg, A. M.; Anderson, Joseph P.; James, P. A.; Foley, Ryan J.; Ganeshalingam, Mohan; Ofek, E. O.; Bildsten, L.; Nelemans, G.; Shen, K. J.; Weinberg, N. N.; Metzger, B. D.; Piro, A. L.; Quataert, E.; Kiewe, M.; Poznanski, Dovi (Macmillan Publishers Limited, 2010-05-20)
    • Geological Society of America 

      Fraser, Morgan; Inserra, Cosimo; Jerkstrand, Anders; Kotak, Rubina; Pignata Libralato, Giuliano; Benetti, Stefano; Botticella, María Teresa; Bufano, Filomena; Childress, Michael; Mattila, Seppo; Pastorello, Andrea; Smartt, Stephen J.; Turatto, Massimo; Yuan, Fang; Anderson, Joe P.; R. Bayliss, Daniel D.; Bauer, Franz Erik; Chen, Ting Wan; Förster Burón, Francisco; Gal Yam, Avishay; Haislip, Joshua B.; Knapic, Cristina; Le Guillou, Laurent; Marchi, Sebastián; Mazzali, Paolo; Molinaro, Marco; Moore, Justin P.; Reichart, Daniel; Smareglia, Riccardo; Smith, Ken W.; Sternberg, Assaf; Sullivan, Mark; Takáts, Katalin; Tucker, Brad E.; Valenti, Stefano; Yaron, Ofer; Young, David R.; Zhou, George (Oxford University Press and Royal Astronomical Society, 2013)
      We present ultraviolet, optical and near-infrared observations of the interacting transient SN 2009ip, covering the period from the start of the outburst in 2012 October until the end of the 2012 observing season. The ...
    • High luminosity, slow ejecta and persistent carbon lines: SN 2009dc challenges thermonuclear explosion scenarios 

      Taubenberger, S.; Benetti, S.; Childress, M.; Pakmor, R.; Hachinger, S.; Mazzali, Paolo; Stanishev, V.; Elias-Rosa, Nancy; Agnoletto, I.; Bufano, Filomena; Ergon, M.; Harutyunyan, A.; Inserra, C.; Kankare, E.; Kromer, M.; Navasardyan, H.; Nicolas, J.; Pastorello, A.; Prosperi, E.; Salgado, F.; Sollerman, J.; Stritzinger, M.; Turatto, M.; Valenti, S.; Hillebrandt, W. (WILEY-BLACKWELL, 2011-04)
      Extended optical and near-IR observations reveal that SN 2009dc shares a number of similarities with normal Type Ia supernovae (SNe Ia), but is clearly overluminous, with a (pseudo-bolometric) peak luminosity of log (L) = ...
    • A Missing-link in the Supernova–GRB Connection: The Case of SN 2012ap 

      Chakrabort, Sayan; Soderberg, Alicia; Chomiuk, Laura; Kamble, Atish; Yadav, Naveen; Ray, Alak; Hurley, Kevin; Margutti, Raffaella; Milisavljevic, Dan; Bietenholz, Michael; Brunthaler, Andreas; Pignata Libralato, Giuliano; Pian, Elena; Mazzali, Paolo; Fransson, Claes; Bartel, Norbert; Hamuy Wackenhut, Mario; Levesque, Emily; MacFadyen, Andrew; Dittmann, Jason; Krauss, Miriam; Briggs, M.S.; Connaughton, V.; Yamaoka, K.; Takahashi, T.; Ohno, M.; Fukazawa, Y.; Tashiro, M.; Terada, Y.; Murakam, T.; Goldsten, J.; Barthelmy, S.; Gehrels, N.; Cummings, J.; Krimm, H.; Palmer, D.; Golenetskii, S.; Aptekar, R.; Frederiks, D.; Cline, T.; Mitrofanov, I. G.; Golovin, D.; Litvak, M. L.; Sanin, A. B.; Boynton, W.; Fellows, C.; Harshman, K.; Enos, H.; von Kienlin, A.; Rau, A.; Zhang, X.; Savchenko, V. (The American Astronomical Society, 2015-06-01)
      Gamma-ray bursts (GRBs) are characterized by ultra-relativistic outflows, while supernovae are generally characterized by non-relativistic ejecta. GRB afterglows decelerate rapidly, usually within days, because their ...
    • MULTI-WAVELENGTH OBSERVATIONS OF SUPERNOVA 2011ei: TIME-DEPENDENT CLASSIFICATION OF TYPE IIb AND Ib SUPERNOVAE AND IMPLICATIONS FOR THEIR PROGENITORS 

      Vljevic, Dan Milisa; Margutti, Raffaella; Soderberg, Alicia; Pignata Libralato, Giuliano; Chomiuk, Laura; Fesen, Robert A.; Bufano, Filomena; Sanders, Nathan E.; Parrent, Jerod T.; Parker, Stuart; Mazzali, Paolo; Pian, Elena; Pickering, Timothy; Buckley, David A.; Crawford, Steven M.; Gulbis, Amanda A.; Hettlage, Christian; Hooper, Eric; Nordsieck, Kenneth H.; O’Donoghue, Darragh; Husser, Tim Oliver; Potter, Stephen; Kniazev, Alexei; Kotze, Paul; Romero Colmenero, Encarni; Vaisanen, Petri; Wolf, Marsha; Bietenholz, Michael F.; Bartel, Norbert; Fransson, Claes; Walker, Emma S.; Brunthaler, Andreas; Chakraborti, Sayan; Levesque, Emily M.; MacFadyen, Andrew; Drescher, Colin; Bock, Greg; Marples, Peter; Anderson, Joseph P.; Benetti, Stefano; Reichart, Daniel; Ivarsen, Kevin (The American Astronomical Society, 2013-04)
      We present X-ray, UV/optical, and radio observations of the stripped-envelope, core-collapse supernova (SN) 2011ei, one of the least luminous SNe IIb or Ib observed to date. Our observations begin with a discovery within ∼1 ...
    • Optical and infrared observations of SN 2002dj: some possible common properties of fast-expanding Type Ia supernovae 

      Pignata Libralato, Giuliano; Benetti, Stefano; Mazzali, Paolo; Kotak, Rubina; Patat, F.; Meikle, P.; Stehle, M.; Leibundgut, B.; Suntzeff, Nicholas B.; Buson, L. M.; Cappellaro, E.; Clocchiatti, A.; Hamuy Wackenhut, Mario; Maza Sancho, José; Mendez, J.; Ruiz Lapuente, P.; Salvo, M.; Schmidt, Brian P.; Turatto, M.; Hillebrandt, W. (BLACKWELL PUBLISHING, 2008-08-11)
      As part of the European Supernova Collaboration, we obtained extensive photometry and spectroscopy of the Type Ia supernova (SN Ia) SN 2002dj covering epochs from 11 d before to nearly two years after maximum. Detailed ...
    • An optical supernova associated with the X-ray flash XRF 060218 

      Pian, E.; Mazzali, Paolo; Masetti, N.; Ferrero, P.; Klose, Sylvio; Palazzi, E.; Ramírez Ruiz, Enrico; Woosley, S. E.; Kouveliotou, C.; Deng, J.; Filippenko, Alexei V.; Foley, Ryan J.; Fynbo, Johan P. U.; Kann, D. A.; Li, Weidong; Hjorth, Jens; Nomoto, K.; Patat, F.; Sauer, D. N.; Sollerman, J.; Vreeswijk, Paul M.; Guenther, E. W.; Levan, A. J.; O'Brien, Peter; Tanvir, N. R.; Wijers, Ralph A. M.; Dumas, C.; Hainaut, O.; Wong, D. S.; Baade, D.; Wang, L.; Amati, L.; Cappellaro, E.; Castro Tirado, A. J.; Ellison, S.; Frontera, F.; Fruchter, Andrew S.; Greiner, J.; Kawabata, K.; Ledoux, C.; Maeda, K.; Møller, P.; Nicastro, L.; Rol, E.; Starling, R. (NATURE PUBLISHING GROUP, 2006-08-31)
      Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae(1) that are more luminous than average(2-5) and that eject material at very high velocities. Less-luminous supernovae were not hitherto known to ...
    • The outermost ejecta of Type Ia supernovae 

      Tanaka, Masaomi; Mazzali, Paolo; Benetti, Stefano; Nomoto, Ken’ichi; Elias-Rosa, Nancy; Kotak, Rubina; Pignata Libralato, Giuliano; Stanishev, Vallery; Hachinger, Stephan (UNIV CHICAGO PRESS, 2008-04-10)
      The properties of the highest velocity ejecta of normal Type Ia supernovae (SNe Ia) are studied via models of very early optical spectra of six SNe. At epochs earlier than 1 week before maximum, SNe with a rapidly evolving ...
    • The peculiar type II supernova 1997D: A case for a very low Ni-56 mass 

      Turatto, M.; Mazzali, Paolo; Young, T. R.; Nomoto, K.; Iwamoto, K.; Benetti, S.; Cappellaro, E.; Danziger, I. J.; Mello, D. F. de; Phillips, M. M.; Suntzeff, Nicholas B.; Clocchiatti, A.; Piemonte, A.; Leibundgut, B.; Covarrubias, R.; Maza Sancho, José; Sollerman, J. (UNIV CHICAGO PRESS, 1998-05-10)
      SN 1997D in NGC 1536 is possibly the least luminous and energetic Type II supernova discovered to date. The entire light curve is subluminous, never reaching M-v = -14.65. The radioactive tail follows the Co-56 decay slope. ...
    • SN 2003bg: A BROAD-LINED TYPE IIb SUPERNOVA WITH HYDROGEN 

      Mazzali, Paolo; Deng, Jinsong; Hamuy Wackenhut, Mario; Nomoto, Ken’ichi (IOP PUBLISHING LTD, DIRAC HOUSE, TEMPLE BACK, 2009-10-01)
      Models for the spectra and the light curve (LC), in the photospheric as well as in the late nebular phase, are used to infer the properties of the very radio-bright, broad-lined type IIb supernova (SN) 2003bg. Consistent ...
    • SN 2009bb: A PECULIAR BROAD-LINED TYPE Ic SUPERNOVA 

      Pignata Libralato, Giuliano; Stritzinger, Maximilian; Soderberg, Alicia; Mazzali, Paolo; Phillips, M. M.; Morrell, Nidia; Anderson, Joseph P.; Boldt, Luis; Campillay, Abdo; Contreras, Carlos; Folatelli, Gastón; Förster, Francisco; González Tagle, Sergio; Hamuy Wackenhut, Mario; Krzeminski, Wojtek; Maza Sancho, José; Roth, Miguel; Salgado, Francisco; Levesque, Emily M.; Rest, Armin; Crain, J. Adam; Foster, Andrew C.; Haislip, Joshua B.; Ivarsen, Kevin M.; LaCluyze, Aaron P.; Nysewander, Melissa C.; Reichart, Daniel E. (2011-02-10)
      Ultraviolet, optical, and near-infrared photometry and optical spectroscopy of the broad-lined Type Ic supernova (SN) 2009bb are presented, following the flux evolution from -10 to +285 days past B-band maximum. Thanks to ...
    • SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova 

      Valenti, S.; Fraser, M.; Benetti, S.; Pignata Libralato, Giuliano; Sollerman, J.; Inserra, C.; Cappellaro, E.; Pastorello, A.; Smartt, S. J.; Ergon, M.; Botticella, M.-T.; Brimacombe, J.; Bufano, F.; Crockett, M.; Eder, I.; Fugazza, D.; Haislip, Joshua B.; Hamuy Wackenhut, Mario; Harutyunyan, A.; Ivarsen, K. M.; Kankare, E.; Kotak, R.; LaCluyze, Aaron P.; Magill, L.; Mattila, S.; Maza Sancho, José; Mazzali, Paolo; Reichart, D. E.; Taubenberger, S.; Turatto, M.; Zampieri, L. (2011)
      We present an extensive set of photometric and spectroscopic data for SN 2009jf, a nearby Type Ib supernova (SN), spanning from∼20 d before B-band maximum to 1 yr after maximum. We show that SN 2009jf is a slowly evolving ...
    • SN 2011hs: a fast and faint Type IIb supernova from a supergiant progenitor 

      Bufano, Filomena; Pignata Libralato, Giuliano; Bersten, M.; Mazzali, Paolo; Ryder, S. D.; Margutti, R.; Milisavljevic, D.; Morelli, L.; Benetti, S.; Cappellaro, E.; González Gaitán, E.; Romero Canizales, C.; Stritzinger, M.; Walker, E. S.; Anderson, J. P.; Contreras, C.; De Jaeger, Thomas; Forster, Francisco; Gutiérrez, Claudia P.; Hamuy Wackenhut, Mario; Hsiao, Eric; Morrell, N.; Olivares, F.; Paillas, E.; Parker, S.; Pian, E.; Pickering, T. E.; Sanders, N.; Stockdale, C.; Turatto, M.; Valenti, S.; Fesen, R. A.; Maza Sancho, José; Nomoto, K.; Phillips, M. M.; Soderberg, A. (Royal Astronomical Society, 2014)
      Observations spanning a large wavelength range, from X-ray to radio, of the Type IIb supernova (SN) 2011hs are presented, covering its evolution during the first year after explosion. The optical light curve presents a ...
    • UNBURNED MATERIAL IN THE EJECTA OF TYPE Ia SUPERNOVAE 

      Folatelli, Gastón; Phillips, M. M.; Morrell, Nidia; Tanaka, Masaomi; Maeda, Keiichi; Nomoto, Ken’ichi; Stritzinger, Maximilian; Burns, Christopher R.; Hamuy Wackenhut, Mario; Mazzali, Paolo; Boldt, Luis; Campillay, Abdo; Contreras, Carlos; González Tagle, Sergio; Roth, Miguel; Salgado, Francisco; Freedman, W. L.; Madore, Barry F.; Persson, S. E.; Suntzeff, Nicholas B. (2012-01-20)
      The presence of unburned material in the ejecta of normal Type Ia supernovae (SNe Ia) is investigated using early-time spectroscopy obtained by the Carnegie Supernova Project. The tell-tale signature of pristine material from ...
    • The underluminous Type Ia supernova 2005bl and the class of objects similar to SN 1991bg 

      Taubenberger, S.; Hachinger, S.; Pignata Libralato, Giuliano; Mazzali, Paolo; Contreras, C.; Valenti, S.; Pastorello, A.; Elias Rosa, L.; Bärnbantner, O.; Barwig, H.; Benetti, S.; Dolci, M.; Fliri, J.; Folatelli, Gastón; Freedman, W. L.; González, S.; Hamuy Wackenhut, Mario; Krzeminski, W.; Morrell, N.; Navasardyan, H.; Persson, S. E.; Phillips, M. M.; Ries, C.; Roth, M.; Suntzeff, Nicholas B.; Turatto, M.; Hillebrandt, W. (2008)
      Optical observations of the Type Ia supernova (SN Ia) 2005bl in NGC 4070, obtained from −6 to +66 d with respect to the B-band maximum, are presented. The photometric evolution is characterized by rapidly declining light ...