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Type-Ia supernova

Alert Notice 477: Supernova 2013E in IC 2532 = PSN J10000552-3414013

January 9, 2013

Event: Supernova 2013E in IC 2532 = PSN J10000552-3414013

Discovered by: Stuart Parker (Canterbury, New Zealand)

Discovery Date: 2013 Jan. 4.58 UT

Discovery Magnitude: red mag 14.8 on a 30-s unfiltered CCD image taken with a 30-cm Astro-Tech AT12RC Ritchey-Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the course of the Backyard Observatory Supernova Search (BOSS)

Special Notice #288: Supernova 2012db in ESO 139-G28 = PSN J17484870-6042193

June 28, 2012IAU Central Bureau Electronic Telegram 3155 (Daniel W. E. Green, ed.) announces the discovery (reported by A. Klotz on behalf of the TAROT collaboration) of a supernova in ESO 139-G28 on 2012 June 24.27 UT at R magnitude 14.6 +/- 0.1, using public images of the 0.25-m TAROT robotic telescope at La Silla, Chile.

Alert Notice 451: Monitoring of the Symbiotic Variable RT Cru Requested

January 27, 2012: The symbiotic variable RT Cru has brightened in hard x-rays. Dr. Jeno Sokoloski, Columbia University, has requested AAVSO assistance in monitoring RT Cru both now and in the future to see if it is doing anything unusual in the optical. The Swift/BAT hard X-ray light curve shows RT Cru has apparently been gradually brightening over the past few years.  

Special Notice #263: SUPERNOVA 2011iy IN NGC 4984 = PSN J13085839-1531041

December 15, 2011:  IAU CBAT Central Bureau Electronic Telegram 2943 (Daniel W. E. Green, Ed.) announces the discovery of an apparent supernova in NGC 4984 by Koichi Itagaki, Yamagata, Japan, at unfiltered CCD magnitude 12.7 on 2011 Dec. 9.856 UT.

Coordinates: R.A. = 13 08 58.39  Decl. = -15 31 04.1 (2000.0)
SN 2011iy is 16.6" east and 6.1" south of the nucleus of NGC 4984.    

SN 2011fe

Welcome to the AAVSO's special webpage devoted to SN 2011fe!

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