------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1708 2001 Nov 11 12.46UT 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.theastronomer.org ------------------------------------------------------------------- SUPERNOVA 2001fv IN NGC 3512 (Q2001/267) On the morning of 2001 Nov 10 (05.49UT), Mark Armstrong reported that he had a single image of a possible supernova in NGC 3512 obtained as long ago as Nov 3.17514UT but that he was not able to obtain follow-up images until Nov 10.15991UT. Although the Central Bureau's minor planet checker showed the asteroid 2797 nearby at magnitude 15, it was found to be 11.6' W and 2.9' N for the discovery image date. The reported astrometry follows: 2001 Nov 3.17514UT RA 11h 04m 01.60s DEC +28 01' 56.0" mag 16.4. Telescope: 0.30-m Schmidt-Cassegrain + unfiltered CCD. 30sec. Limiting magnitude 18.5. 2001 Nov 10.15991UT RA 11h 04m 01.66s DEC +28 01' 55.4" mag 17.2. Telescope: 0.36-m Schmidt-Cassegrain + unfiltered CCD. 3x60sec. Limiting magnitude 18.5. Apart from the suspect's absence on Mark's master patrol image and those from the Palomar III sky survey, the editor noted the object was not shown on an image of this galaxy in J. C. Vickers' Deep Space CCD Atlas: North (1993, p112, limiting magnitude 19). The following IAUC contains some revised astrometry and magnitude data subsequently submitted by Mark to whom we again offer our congratulations on this further success. Guy M. Hurst, Basingstoke, England, reports the discovery by Mark Armstrong, Rolvenden, England, of an apparent supernova (mag 16.4) on an unfiltered CCD image taken on Nov. 3.175 UT in the course of the U.K. Nova/Supernova Patrol; the object was at mag 16.8 on images obtained on Nov. 10.16. SN 2001fv is located at R.A. = 11h04m01s.66, Decl. = +28o01'55".7, which is 21" west and 10".5 south of the centre of NGC 3512. The new object is not present Armstrong's image from 2000 Dec. 22 (limiting mag 19.0) or on Palomar Sky Survey images taken on 1955 Mar. 22, 1992 May 2 (blue, limiting mag 22.5), and 1998 May 21 (red, limiting mag 20.5) IAUC 7749 Guy M Hurst