This page is devoted to information on Supernova 1999aa in NGC 2595. 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.
Supernova 1999aa was discovered simultaniously by several people. The first to report it was Ron Arbour or England, and was found while it was still brightening.
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 |
|---|---|---|---|---|
| Ron Arbour | 2/11.0166/99 | 15.5 | CCD | Discovery|
| CfA | 2/12/99 | CCD | ||
| Helmut Ullrich | 2/12/99 | C | TIFF version | |
| Jean Marie Llapasset | 2/12/99 23h03m09s | 15.97 | CCD | |
| Jean Marie Llapasset | 2/12/99 23h03m09s | 15.97 | CCD | with Star magnitudes |
| Larry Robinson | 2/13.34/99 | 15.5 | CCD | |
| ND James | 2/13.783/99 | CCD | ||
| Jean Marie Llapasset | 2/13/99 20h55m11s | 15.79 | CCD | |
| I.L.R.A. image | 2/14/99 | C | ||
| Alain Moisson | 2/14/99 | 15.66 | CCD | |
| Robert Kuberek | 2/14/99 9:50 PST | C | ||
|
René Roy Blauvac Obs | 2/14/99 - 20h32m53s | 15.96 | CCD | |
| Jean Marie Llapasset | 2/14/99 21h24m51s | 15.66 | CCD | |
| Hubert Lehmann | 2/15/99 | 15.64 | CCD | |
| Y. Sano | 2/16.5647/99 | 15.34 | CCD | |
| Pedro Ré | 2/18/99 21:06 | 15.3 | CCD | Comparison images|
| Diego Rodriguez | 2/18.958/99 | 15.00 | CCD | |
| Trisciani Damiano | 2/19/99 | CCD | ||
| Aldo Proietti | 2/19/99 00.40 UT | CCD | STARLIGHT XPRESS SXR-C 10x60 seconds | |
|
Apache Point Observatory | 2/19/99 02:08:09 UT | 13.82 14.78 14.81 | U V B | |
| Robert Kuberek | 2/20/99 | C | ||
| Claude Boivin | 2/21/99 00:32 UT | 14.9 | CCD | |
| Paul Pinel | 2/22/99 - 21h22m03s | 15.27 | CCD | |
| Worth Hill image | 2/22/99 21:49:44 | C | ||
| Robin Chassagne | 2/22/99 - 22h01m00s | 15.29 | CCD | |
|
KenIchi Kadota Seiichi Yoshida |
2/23/99 01:44:11 JST | 15.2 | CCD | |
| Kereszty Zsolt | 2/23/99 | CCD | ||
|
Juan Gonçalves Joăo Porto | 2/24/99 23:53 UT | 14.76 | CCD | |
| Claude Boivin | 2/25/99 01h10m00s | 15.0 | C | |
| Jean Marie Llapasset | 2/25/99 20h02m49s UT | 15.11 | CCD | |
| Robin Chassagne | 2/25/99 20:35 UT | 14.86 | CCD | |
| Observatoire de Narbonne | 3/2.8/99 | 15.2 | C | |
| Paul Pinel | 3/3.9/99 | 15.49 | CCD | |
| Marko Moilanen | 3/4/99 0.30 UT | 15.0 | R | |
|
KenIchi Kadota Seiichi Yoshida |
3/4/99 02:22:25 JST | 15.8 | CCD | |
| G. Sala | Undated | CCD | color | |
| Paul Pinel | 3/6.9/99 | 15.65 | CCD | |
| Observatoire de Narbonne | 3/7.8/99 | 15.6 | CCD | |
| Kereszty Zsolt | 3/7/99 19:12 UT | 16.4 | CCD | Miskolc, Hungary |
| Paul Pinel | 3/12.0/99 | 15.96 | CCD | |
| Kereszty Zsolt | 3/12/99 21:15 UT | 15.3 | CCD | |
| Larry Robinson | 3/14/99 | CCD | ||
| Paul Pinel | 3/14.8/99 | 15.96 | CCD | |
| Paul Pinel | 3/15.8/99 | 15.97 | CCD | |
| René Roy | 3/15.81/99 | 15.99 | CCD | |
| Robin Chassagne | 3/15.9/99 | 16.04 | CCD | |
|
KenIchi Kadota Seiichi Yoshida |
3/16/99 21:48:52 JST | 16.2 | C | |
| Paul Pinel | 3/16.86/99 | 16.04 | CCD | |
| Observatoire de Narbonne | 3/17.8/99 | 15.96 | CCD | |
| Paul Pinel | 3/17.86/99 | 16.0 | CCD | |
| László L. Kiss | 3/18/99 19:49 UT | C | ||
| Claude Boivin | 3/18/99 02h15m00s | 16.0 | C | |
| Observatoire de Narbonne | 3/19.8/99 | 16.1 | CCD | |
| Observatoire de Narbonne | 3/20.8/99 | 16.2 | CCD | |
| Paul Pinel | 3/20.8/99 | 16.1 | C | |
| Observatoire de DAX | 3/21/99 03h16m38s | C | ||
| Pedro Ré | 3/22/99 20:03 UT | 16.01 | C | |
| Observatoire de DAX | 3/30/99 03h16m38s | C | ||
| Paul Pinel | 3/31.868/99 | 16.5 | C | |
| Paul Pinel | 4/3.9/99 | C | ||
| Paul Pinel | 4/8.8/99 | C | ||
| Paul Pinel | 4/9.834/99 | 16.9 | C | |
| Pedro Ré | 4/5/99 21:22 UT | 16.7 | C | |
| Kopernik image | 4/11/99 3:11 UT | C | ||
| Paul Pinel | 4/11.4/99 | 16.9 | C | |
| Kereszty Zsolt | 4/14/99 19:58 UT | 17.0 | C | |
| Paul Pinel | 4/29.4/99 | 17.5 | C | |
| Monte Gernelli Observatory | Undated | C |
Light curves and Spectra:
"The rise and fall of 1999aa" by Alessandro Dimai from
Cortina Astronomical Association
from [vsnet-alert 2617] SN 1999aa in NGC 2595
Dear SN watchers,
Mr. Ron Arbour, U.K. amateur astronomer, has discovered his third supernova in NGC 2595 on Feb. 11.02. Congratulations, Ron!
According to IAUC 7108, the new star appears at R.A. = 8h27m42s.03, Decl. = +21o29'14".8 (2000.0), which is about 30" north from the bright core of the host galaxy NGC 2595. The host is an SBc galaxy nearly face-on, and SN 1999aa is just on the northern arm (ring?). (Images can be seen at Mr. Bishop's page: http://www.ggw.org/asras/snimages .)
Reported magnitudes of SN 1999aa (from IAUC), 1998 03 >17.5C R. Arbour 1999 02 5.3 >19C KAIT 1999 02 11.017 15.5C R. Arbour, which tells that it would be on the brightening phase.
The spectroscopy has performed at Lick Observatory, which tells that this SN is peculiar one and resembles that of a peculiarly bright SN Ia 1991T about a week before maximum.
From the recession velocity of the host (4400 km s-1, vsnet-chat 1641), the maximum of typical SNe Ia at this distance would be 15.5 mag or so, but 1991T was 0.5 -- 1 mag brighter than normal SNe Ia. Further magnitude estimates are greatly encouraged, which will provide a good tests for "brighter SN Ia has broader light curve" hypothesis.
Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp
