------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2003 2004 Jun 04 09.56UT 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 2004by IN NGC 7116 On 2004 May 24, we received an e-mail from Mark Armstrong of Rolvenden, England reporting that he had detected a possible supernova in NGC 7116 on CCD unfiltered images of 2004 May 24.10188UT secured with a 0.35-m Schmidt-Cassegrain telescope during the course of searches for the UK Nova/Supernova Patrol: RA 21h 42m 41.88s DEC +28 56'50.6" Mag 18.3, LM frame 19.5. Offsets 16"E and 1.9"N of the centre of the galaxy. Mark added that there was no trace of the suspect in his images of 2001 July 15 and 2003 Dec 17 (limiting magnitude 19.5 in each case) or on POSS-II red (LM 20.8) or blue (LM 22.5) plates. Confirmation was then delayed due to bad weather but the object was finally imaged again on May 28.026UT with offsets as follows: RA 42.00s DEC 50.4" The object's magnitude was 18.9 based on analysis of 10 x 60 second images where the limiting magnitude was about 21. Martin Mobberley, Cockfield, England, also confirmed the new object on an unfiltered CCD image taken on May 27.951 with a 0.35-m reflector. The object has been designated supernova 2004by and was announced on IAUC 8349. Congratulations to Mark on the discovery of his 63rd supernova. V1592 SGR Mati Morel, Australia, has reported that Albert Jones, of New Zealand, detected an apparently new variable star a few arc minutes south west of the nova V5114 Sgr. His observations follows: May 20.4236UT, mag 11.5v, 20.4778, 11.6, 20.7014, 11.6. Subsequent investigations have shown that Jones' star is a Mira variable. The ASAS-3 database logs it as 181921-2838.2, varying from 11.3-<13.0V. Available astrometry (2000): GSC2.2 : 18:19:20.956 -28:38:22.0 USNO-B1.0 : 18 19 20.96 -28:38:21.8 2MASS 18 19 20.98 -28 38 22.5 Further, the object can also be identified with Ponsen's variable No. 17 (Leiden Ann 20, No 16, 398 (1955)). His finder chart is a good match for Jones' star. Ponsen 17 is now known as V1592 Sgr, but it should be noted that the published declination for this star is in error by 10.0'. Guy M Hurst