Alert Notice 224: 2327-54 Supernova 1996al in NGC 7689
Active Dates: July 22, 1996 – July 23, 1996
Abstract:
We have been informed by the Central Bureau of Astronomical Telegrams (_IAU Cincular 6437_) of the visual discovery of a supernova in NGC 7689 by Robert Evans and R. Benton, Coonabarabran, New South Wales, and Samantha Beaman, Pimpama, Queensland, Australia, on July 22.71 UT at magnitude approximately 14.0, using the Australian National University 1-m telescope at Siding Spring. The supernova is about 30" north of the center of the galaxy, and does not appear on earlier European Southern Observatory (ESO) survey films or CCD survey images.
Justification:
The supernova was confirmed by S. Benetti, ESO, and R. Neuhauser, Max-Planck- Institut, Garching, Germany, on inspection of a preliminarily-reduced CCD spectrum taken with the ESO 1.52-m telescope at La Silla, Chile, on July 23.35 UT, as a type II supernova discovered soon after explosion (_IAU Circular 6438_). The spectrum also showed evidence of circumstellar material, probably lost by the supernova progenitor before exploding, and is expected to evolve rapidly (_IAU Circular 6438_).
Requested Data Types:
Photometry
Targets
| Name | Magnitude | Variability Type | Photometry Notes | Spectroscopy Notes |
|---|---|---|---|---|
| NGC 5904 SAW V42 | 10.50 | CWA |
Cadence: Not Specified Precision: 100 |
Not Requested |
Spectroscopy Lines:
No spectroscopy lines provided
Photometry Filters:
No photometry filters provided
Comparison Stars:
No comparison stars provided
Co-Authorship
Observers are not eligible for co-authorship.
Additional Observer Input:
Not provided
Additional Submission Location:
Not provided
Forum URL
N/A
Notes:
Principal Investigator: Robert Evans, R. Benton, Samantha Beaman; Imported Campaign (Alert Notice #224)