Supernova 1999eb in NGC 664

This page is devoted to information on Supernova 1999eb in NGC 664 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main supernova page. Information on the original web pages for many of these images can be found on the Supernova links web page.

This one's interesting. First, it's of the rare type IIn (from IAUC 7268) and we soon learned that it appears to be coincident with GRB 991002 (from IAUC 7269). NGC 664 has been very active lately, spawning SN 1996bw, and 1997W. A really neat image showing both of these SN at the same time can be found here. Normally, I wait until I get about 6 or so images before starting a web page for a specific SN, with 3 images and a spectrum the first day, I decided to get started while I had time. Supernova 1999eb is the 25th LOSS discovery this year.

Web pages dedicated to this SN.

  • AUDE has a 1999eb page in French [Translate]

    The following is a list of images of this SN, in chronological order. Click on the name in the "observer" column to see the image. Times and dates are in UT unless otherwise noted. If you know of any others, please tell me!
    LOSS image 10/2.4/9916.2CDiscovery
    Mario Hamuy image undatedC
    JM Llapasset image 10/5.100/99C
    Pepe Manteca image 10/5.15/99C mirror
    Josep M. Bosch image 10/5.15/99C mirror
    CfA Spectrum 10/5.800/99C shows narrow hydrogen and helium lines, with a peculiar absorption blue-shifted 900 km/s from the peaks
    CfA image 10/5.800/99C
    Fred Ewalt image 10/7.122/9916.5C
    S. Moretti and S. Tomaselli image 10/7.9/9916.1C
    Pepe Manteca image 10/9.23/99C mirror
    Roland Santallo image 10/9.46/99C
    Juan Gonçalves
    João Porto
    Beaver Meadow Observatory image 10/11.135/99C
    B. Csák image 10/15.911/99C
    Fred Ewalt image 10/19.087/99>16.0C
    KenIchi Kadota
    Seiichi Yoshida image
    11/5/99 0:36 JSTC
    Robin Chassagne image 11/12.795/99C
    Robin Chassagne image 11/15.792/99C

    Light curves and Spectra:

  • VSNET Light curve (requires JAVA).
    If you have observations of this Supernova, please send them to Use this VSNet data query to see what information has been reported so far. Other VSNet data on this SN:
  • [vsnet-alert 3553] SNe 1999eb and 1999ec
  • [vsnet-chat 2335] Host galaxy of SN1999eb
  • [vsnet-chart 202] Chart of SN1999eb
    Back to Bright Supernovae - 1999.
    Back to Bright Supernovae.
    Back to Bright Supernovae - 1999
    David Bishop
    Last modified: Tue Jun 13 14:29:16 EDT 2000