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AAVSO Special Notice #73: SN 2007le in NGC 7721 AAVSO HOME > publications > special notice

AAVSO Special Notice #73

SN 2007le in NGC 7721
October 15, 2007

SN 2007le was discovered in the galaxy NGC 7721 on October
13, 2007 by L.A.G. (Berto) Monard of Pretoria, South Africa 
(CBET 1100, Monard).  The supernova has since been 
classified as a type-Ia, approximately 7-10 days prior 
to maximum (CBET 1101, Silverman et al.).

The coordinates of the supernova are:

RA: 23:38:48.41 , Dec -6:31:21.3 (J2000)

The supernova was discovered by Monard at magnitude 
15.2 (red) on October 13.79 UT (JD 2454387.29), and has 
since been observed at magnitude 14.9 (unfiltered) by 
K. Itagaki (Yamagata, Japan) on October 14.565 UT 
(JD 2454388.065).

The supernova is approximately 17 arcseconds south of the
nucleus of the galaxy.  Early photometry will be possible, 
but late time photometry will be difficult because of 
background contamination from the host galaxy.  A comparison
star sequence will be issued as soon as it is available.

Please report all observations to the AAVSO as 
"SN 2007LE" (AAVSO designation 2333-07).

Congratulations to Berto Monard for another supernova
discovery!


This AAVSO Special Notice was prepared by Matthew Templeton.

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