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THE ASTRONOMER Electronic Circular No 1667      2001 Aug 16 17.54UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK             GMH at AST.STAR.RL.AC.UK
WORLD WIDE WEB                    http://www.demon.co.uk/astronomer
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SUPERNOVA 2001dn IN NGC 662 (Q2001/240)
On 2001 August 14 at 04.14UT, an e-mail was received from Tom
Boles reporting that he had imaged a possible supernova in NGC 662
on a 60 second integration of that date. Although close to the
nucleus there was no evidence that this bright magnitude 15.5
object had been present on Palomar II survey photographs even
though their limiting magnitude was estimated to be near
magnitude 24.

Follow-up images by Tom under 24 hours later showed the object
was stationary and not an asteroid. Additional confirmation was
obtained by Mark Armstrong. The following IAUC announcement has
now been made:


Guy M. Hurst, Basingstoke, England, reports the discovery by Tom
Boles (Coddenham, Suffolk) of an apparent supernova (mag 15.5) on
an unfiltered CCD image (limiting mag 18.5) obtained on Aug. 14.069
UT with a 0.36-m reflector.  The following averaged astrometry was
measured from six exposures:  R.A. = 1h44m35s.32, Decl. =
+37o41'49".7 (2000), which is 4" west and 3" north of the centre of
NGC 662.  SN 2001dn is also present on unfiltered CCD images taken
on Aug. 14.870 (by Boles; mag about 15.5) and 15.003 (by
Mark Armstrong, Rolvenden, Kent).  SN 2001dn was not present on a
Boles image taken on 1999 Oct. 16 (limiting mag 18.5) or on Palomar
Sky Survey photographs taken on 1989 Nov. 18 and 1988 Sept. 13.
IAUC 7681

Guy M Hurst