This page is devoted to information on Supernova 1999bw in NGC 3198. 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.
The object was first spotted in a LOSS image on April 15th of 1999, but there was some confusion. NGC 3198 is a nearby galaxy, so it should be at least mag 15. Why is it so dim? For a few days, people were scratching their heads wondering just what this thing was. For some time it was called "The Possible in NGC 3198". The problem was solved by Dr. Filippenko of LOSS who declared it a rather odd Supernova of type IIn in IAUC 7152.
Web pages dedicated to this SN.
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.
If you know of any others,
please tell me!
| Observer | Date | Mag | Filter | Comments |
|---|---|---|---|---|
|
Juan Gonçalves João Porto | 4/12/99 23:07:08 | 18.49 | C | Pre Discovery |
| LOSS | 4/20.2/99 | 17.8 | C | Discovery |
| Y. Sano | 4/21.487/99 | 17.8 | C | |
| Y. Sano | 4/21.547/99 | 17.8 | C | |
| DAX Observatory | 4/22/99 23:15:04 UT | 17.8 | C | |
| Hans Dannhoff image | 4/26/99 23:48 UT | C | ||
| Norbert Stapper | 5/2/99 21:00UT | C | Mirror | |
| Udo Zlender | 5/3/99 | C | ||
| Larry Robinson | 5/6.2/99 | C | ||
| MAXIMO SUAREZ TEJERA | 5/8.9965/99 | C | ||
| Yasuo sano | 5/10.474/99 | 17.28 | C | With 4/21/99 image. |
| Mario Motta image | 5/10/99 | C | ||
| Kopernik image | 5/11.163/99 | C | ||
| Ca' Bionda Observatory | 5/14.9/99 | C |
Light curves and Spectra:
