------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1977 2004 Mar 11 09.45UT 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 2004aq IN NGC 4012 Mark Armstrong, Rolvenden, England has reported his discovery of a further supernova during the course of the UK Nova/Supernova Patrol, this time found in the galaxy NGC 4012. The following astrometry has been reported: 2004 03 02.12819 RA 11h 58m 27.25s DEC +10 01`04.5" Mag 17.5. Offsets 4.6" W and 12.8"S The limiting magnitude of this discovery frame was 19.0. The limit of Mark's master frame of 2003 March 26 was only about 18.0 but a KAIT master of 2002 May 12 did reach 20.0 and neither recorded the suspect. The object is also not present on POSS-II red and blue images. It was again recorded by Mark on Mar 7.080 at magnitude 17.5 and confirmed by Denis Buczynski of Lancaster on March 8.848UT at magnitude 17.5. Mark has relayed the following additional message: N. Elias-Rosa and S. Benetti, Osservatorio Astronomico di Padova;, V. Stanishev and A. Goobar, Stockholm University; and A. Jaervinen, Nordic Optical Telescope (NOT), on behalf of the 'ERTN' report that inspection of a spectrum (range 320-910 nm, resolution 1.7 nm), obtained on Mar. 10.01 UT with the NOT (+ ALFOSC) at La Palma, that SN 2004aq is a type-II supernova, about 1 month after explosion. The spectrum is dominated by P-Cyg lines of H, Ca II, and Fe II overimposed on a relatively blue continuum (T_bb about 8000 K). The expansion velocities deduced from the H_alpha and H_beta absorptions are about 7700 and 6500 km/s, respectively. The object has been designated SN 2004aq and has been announced on IAUC 8301. Congratulations to Mark on the discovery of his 57th supernova. SUPERNOVA 2004an IN IC 4483 LOSS discovery of a possible supernova (IAUC 8299): SN 2004 UT R.A. (2000.0) Decl. Mag. Offset 2004an Mar. 7.50 14 40 19.57 +16 41 03.8 18.1 1.1"E, 2.7"S SUPERNOVA 2004ao IN UGC 10862 LOSS discovery of a possible supernova (IAUC 8299): SN 2004 UT R.A. (2000.0) Decl. Mag. Offset 2004ao Mar. 7.54 17 28 09.35 + 7 24 55.5 14.9 6.3"E, 23.8"S SUPERNOVA 2004ap IN PGC 29306 LOSS discovery of a possible supernova (IAUC 8300): SN 2004 UT R.A. (2000.0) Decl. Mag. Offset 2004ap Mar. 8.31 10 05 43.81 +10 16 17.1 16.5 10.5"W, 19.5"S ERRATA: TA E-CIRCULAR 1976 The heading for six supernovae found in the ESO search contains reference to 2004al which should read 2004ai. The item regarding supernova 2004am stating it has been found back to 1993 November 23.54 should read 2003 November 23.54. Thanks to David Moore in Ireland for initially drawing my attention to the latter error. EDITORIAL ABSENCE The editor will be away from Friday March 12 until Sunday evening March 14. Urgent (discovery) messages may be telephoned to me on my mobile number 07905332226 during that period. Guy M Hurst