Browsing Faculty of Arts and Sciences by Author "Challis, Peter M."

Now showing items 1-8 of 8

    • A Study of the Type II-Plateau Supernova 1999gi and the Distance to its Host Galaxy, NGC 3184 

      Leonard, Douglas C.; Filippenko, Alexei V.; Li, Weidong; Matheson, Thomas; Kirshner, Robert P.; Chornock, Ryan; Van Dyk, Schuyler D.; Berlind, Perry; Calkins, Michael L.; Challis, Peter M.; Garnavich, Peter M.; Jha, Saurabh; Mahdavi, Andisheh; Leonard, Douglas; Filippenko, Alexei; Li, Weidong; Matheson, Thomas; Kirshner, Robert; Chornock, Ryan; Van Dyk, Schuyler; Berlind, Perry; Calkins, Michael; Challis, Peter; Garnavich, Peter; Jha, Saurabh; Mahdavi, Andisheh (American Astronomical Society, 2002)
      We present optical spectra and photometry sampling the first 6 months after discovery of supernova (SN) 1999gi in NGC 3184. SN 1999gi is shown to be a Type II-plateau event with a photometric plateau lasting until about ...

    • Cepheid Calibrations from the Hubble Space Telescopeof the Luminosity of Two Recent Type Ia Supernovae and a Redetermination of the Hubble Constant 

      Riess, Adam G.; Li, Weidong; Stetson, Peter B.; Filippenko, Alexei V.; Jha, Saurabh; Kirshner, Robert P.; Challis, Peter M.; Garnavich, Peter M.; Chornock, Ryan (American Astronomical Society, 2005)
      We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC 3370 and SN 1998aq in ...

    • Evolution of the Reverse Shock Emission from SNR 1987A 

      Heng, Kevin; McCray, Richard; Zhekov, Svetozar A.; Challis, Peter M.; Chevalier, Roger A.; Crotts, Arlin P. S.; Fransson, Claes; Garnavich, Peter; Kirshner, Robert P.; Lawrence, Stephen S.; Lundqvist, Peter; Panagia, Nino; Pun, C. S. J.; Smith, Nathan; Sollerman, Jesper; Wang, Lifan (American Astronomical Society, 2006)
      We present new ( 2004 July) G750L and G140L Space Telescope Imaging Spectrograph ( STIS) data of the H alpha and Ly alpha emission from supernova remnant ( SNR) 1987A. With the aid of earlier data, from 1997 October to ...

    • Extraordinary Late‐Time Infrared Emission of Type IIn Supernovae 

      Gerardy, Christopher L.; Fesen, Robert A.; Nomoto, Ken’ichi; Garnavich, Peter M.; Jha, Saurabh; Challis, Peter M.; Kirshner, Robert P.; Hoflich, Peter; Wheeler, J. Craig (American Astronomical Society, 2002)
      Near-infrared observations are presented for five Type IIn supernovae (SN 1995N, SN 1997ab, SN 1998S, SN 1999Z, and SN 1999el) that exhibit strong infrared excesses at late times (tgreater than or similar to100 days). H- ...

    • Hubble Space Telescope and Ground‐based Observations of SN 1993J and SN 1998S: CNO Processing in the Progenitors 

      Fransson, Claes; Challis, Peter M.; Chevalier, Roger A.; Filippenko, Alexei V.; Kirshner, Robert P.; Kozma, Cecilia; Leonard, Douglas C.; Matheson, Thomas; Baron, E.; Garnavich, Peter; Jha, Saurabh; Leibundgut, Bruno; Lundqvist, Peter; Pun, C. S. J.; Wang, Lifan; Wheeler, J. Craig (American Astronomical Society, 2005)

    • Hubble Space Telescope Spectroscopic Observations of the Ejecta of SN 1987A at 2000 Days 

      Wang, Lifan; Wheeler, J. Craig; Kirshner, Robert P.; Challis, Peter M.; Filippenko, Alexei V.; Fransson, Claes; Panagia, Nino; Phillips, Mark M.; Suntzeff, Nicholas (American Astronomical Society, 1996)
      We have used the Faint Object Spectrograph on the Hubble Space Telescope (HST) to observe the spectra of SN 1987A over the wavelength range 2000-8000 Angstrom on dates 1862 and 2210 days after the supernova outburst. Even ...

    • Hubble Space Telescope Spectrum of SN 1987A at an Age of 8 Years: Radioactive Luminescence of Cool Gas 

      Chugai, Nikolai N.; Chevalier, Roger A.; Kirshner, Robert P.; Challis, Peter M. (American Astronomical Society, 1997)

    • Limits from the Hubble Space Telescope on a Point Source in SN 1987A 

      Graves, Genevieve J. M.; Challis, Peter M.; Chevalier, Roger A.; Crotts, Arlin; Filippenko, Alexei V.; Fransson, Claes; Garnavich, Peter; Kirshner, Robert P.; Li, Weidong; Lundqvist, Peter; McCray, Richard; Panagia, Nino; Phillips, Mark M.; Pun, Chun J. S.; Schmidt, Brian P.; Sonneborn, George; Suntzeff, Nicholas B.; Wang, Lifan; Wheeler, J. Craig (American Astronomical Society, 2005)
      We observed supernova 1987A ( SN 1987A) with the Space Telescope Imaging Spectrograph ( STIS) on the Hubble Space Telescope ( HST) in 1999 September and again with the Advanced Camera for Surveys ( ACS) on the HST in 2003 ...