Browsing by Author "Schommer, Robert A."

Now showing items 1-4 of 4

    • The Hubble diagram of the Calan/Tololo type Ia supernovae and the value of H-0 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, Robert A.; Maza Sancho, José; Avilés, R. (1996-12-06)
      The Calan/Tololo supernova survey has discovered similar to 30 type Ia supernovae at redshifts out to z similar to 0.1. Using BV(I)(KC) data for these objects and nearby SNe Ia, we have shown that there exists a significant ...
    • The morphology of type Ia supernovae light curves 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Suntzeff, Nicholas B.; Schommer, Robert A.; Maza Sancho, José; Smith, R. C.; Lira Teillery, Paulina; Avilés, R. (1996-12)
      We present a family of six BVI template light curves for SNe Ia for days -5 and +80, based on high-quality data gathered at CTIO. These templates display a wide range of light-curve morphologies, with initial decline rates ...
    • A NEARLY SYMMETRIC DOUBLE-IMAGE GRAVITATIONAL LENS 
      Winn, Joshua N.; Hewitt, Jacqueline N.; Patnaik, Alok R.; Schechter, Paul L.; Schommer, Robert A.; López Morales, Sebastián; Maza Sancho, José; Wachter, Stefanie (2001-03)
      We report the discovery of a new double-image gravitational lens, resulting from our search for lenses in the southern sky. Radio source PMN J2004[1349 is composed of two compact components separated by 1A.13 in VLA, ...
    • SN 1992K - a twin to the subluminous type ia SN 1991bg 
      Hamuy Wackenhut, Mario; Phillips, M. M.; Maza Sancho, José; Suntzeff, Nicholas B.; Della Valle, Massimo; Danzinger, J.; Antezana, Roberto; Wischnjewsky, M.; Avilés, Roberto; Schommer, Robert A.; Kim, Y. C.; Wells, Lisa A.; Ruiz González, María Teresa; Prosser, Charles F.; Krzeminski, W.; Baylin, Charles D.; Hartigan, Patrick; Hughes, Joanne (1994-12)
      We present spectroscopic and photometric data for SN 1992K, a Type Ia event found in the course of the Calan/Tololo supernova survey. These data show an impressive similarity with the spectra and light curves of the atypical ...