Supernova 2002bj in NGC 1821
This page is devoted to information on Supernova 2002bj in NGC 1821 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 Jack Newton while scanning images taken by
Tim Puckett. Also discovered by
LOTOSS.
A fairly bright one is the constillation of Lepus.
Somewhere around the night of 2002/03/14 this supernova dropped
dramatically in brightness.
We have a DSS Photometry reference image made by Odd Trondal.
Icon generated from Tim Puckett'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 |
|---|---|---|---|---|
| Tim Puckett image | 2002/02/28.06 | 14.8 | C | Discovery |
| LOTOSS image | 2002/02/28.2 | 14.7 | CR | Discovery |
| Josch Hambsch image | 2002/03/02.796 | 14.8 | C | |
| JM Llapasset image | 2002/03/03.825 | 14.6: | CR | |
| J. Nicolas image | 2002/03/03.868 | 14.6: | CR | |
| Josch Hambsch image | 2002/03/04.790 | 14.8 | C | |
| J. Nicolas image | 2002/03/04.815 | 15.0: | CR | |
| JB. De Vanssay image | 2002/03/04.838 | 14.8 | CR | |
| Fred Ewalt image | 2002/03/07.008 | 14.6 | C | |
| Ella Sanders image | 2002/03/07.71 | C | ||
| Martin Mobberley image | 2002/03/07.849 | C | ||
| Fred Ewalt image | 2002/03/17.050 | 15.7 | C |
Dear SN watchers,
A bright (discovery mag 14.7-8) SN was discovered by Puckett Obs. and the LOTOSS KAIT. It seems a young object and somewhat luminous as in NGC 1821.
SN 2002bj was discovered on Feb. 28, and confirmed on the next night at the nearly same magnitude. It was not detected on Feb. 21, so it seems a young object. The position of SN (by KAIT team) is: R.A. = 5h11m46s.37, Decl. = -15o08'10".7 (2000.0), which is about 5" east and 6" south of the apparent center of a irregular-shaped (IB(s)m) galaxy NGC 1821. It lies superimposed on the central bar.
The recession velocity of NGC 1821 is 3608 km/s (NED value) and there is notable Galactic extinction (A_V \sim 0.3 mag). If this velocity is of the Hubble flow, the expected maximum for typical SN Ia is mag about 15.3, which is already overcome by the discovery mag. The spectroscopic confirmation and further magnitude monitoring is urged.
Sincerely Yours, Hitoshi Yamaoka, Kyushu Univ., Japan yamaoka@rc.kyushu-u.ac.jp
Dear SN watchers,
I have heard that SN 2002bj suddenly faded, and now around mag 17. It was mag about 14.6 on Mar. 7. The spectrum (IAUC 7844, Gunma and CfA) suggests that it is a luminous IIn SN, but such rapid fading has been observed only in a faint SN IIn. The confirmation of the drop and the follow-up photometry is extremely encouraged.
Sincerely Yours, Hitoshi Yamaoka, Kyushu Univ., Japan yamaoka@rc.kyushu-u.ac.jp