Supernova 2002bl in UGC 5499
This page is devoted to information on Supernova 2002bl in UGC 5499 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page. Information on the original web pages for many of these images can be found on the updates and links web pages.
Discovered by Mark Armstrong (#36). A spectrum shows this to
be another type Ib/c Hypernova (5th one). This one found after
maximum.
We have a DSS Photometry reference image made by Odd Trondal.
Icon generated from Mark Armstrong's discovery image.
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!
| Image Credit | Date | Mag | Filter | Comments |
|---|---|---|---|---|
| Doug Rich image | 2002/02/12.210 | 17.8 | C | Pre Discovery |
| Mark Armstrong image | 2002/03/02.901 | 17.0 | C | Discovery, local mirror |
| Josch Hambsch images | 2002/03/07.934 | 16.7 | C | |
| JM Llapasset image | 2002/03/08.862 | C | ||
| Josch Hambsch images | 2002/03/10.806 | 15.9 | C | |
| John N. Gretchen III | 2002/03/13.092 | 17.8 | C | color version |
| Odd Trondal images | 2002/03/13.863 | 16.5 | C | |
| Fred Ewalt image | 2002/03/15.103 | 18.27 | R | |
| Thanasis Georgiou image | 2002/03/20.824 | C |
Dear SN watchers,
M. Armstrong discovered a SN, which was revealed to be a hypernova! It is fifth example of hypernova, after SNe 1997ef, 1998bw, 1998ey and recent 2002ap, but somewhat more distant.
According to IAUC 7845, SN 2002bl was discovered on Mar. 2.901 UT at mag 17.0 (unfiltered CCD), and seems to remain at the constant brightness up to Mar. 7.059 UT. The position is R.A. = 10h12m17s.28, Decl. = +27o51'52".4 (2000.0), which is about 5" west and 9" north of the nucleus of the highly tilted barred-spiral (SBb:) galaxy UGC 5499. It is superimposed on the disk region.
The spectrum of this object was obtained with Keck-I telescope on Mar. 7 UT. It shows a quite resemblance with 'hypernovae' SNe 1997ef, 1998bw, and 2002ap about 2 weeks after the explosion. Some feature resembles that of SN 1997ef, which was not so luminous, and the other feature resembles that of luminous SN 1998bw.
The recession velocity of UGC 5499 is 4753 km/s (NED), which shows good coinsidence with that of SN 1998ey (4839 km/s). The maximum of this hypernova was mag about 16.8, which is also in good agreement of the discovery mag of the new object. It is quite important to follow-up this hypernova in order to study such energetic explosions.
Sincerely Yours, Hitoshi Yamaoka, Kyushu Univ., Japan yamaoka@rc.kyushu-u.ac.jp
