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)