------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2930 2013 Jly 16 19.03UT 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 Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- ASAS-SN DISCOVERY OF A BRIGHT OPTICAL TRANSIENT NEAR PGC 065535 K. Z. Stanek, Ohio et. al., reports on The Astronomers' Telegram 5209 that during the ongoing All Sky Automated Survey ASAS-SN using data from the double 14-cm "Brutus" telescope in Haleakala, Hawaii, discovered a new transient source, possibly a bright supernova or CV in outburst: Object RA (J2000) DEC (J2000) Disc. UT Date Magnitude ASASSN-13bq 20 51 13.447 -18 38 52.63 2013 7 16.45 15.0 No source is detected on July 14 or in earlier images (V>17 mag), but with initial strong detection in two ASAS-SN images on July 16, followed by confirmation detection still the same night (3.7 hours later) on another four images, giving consistent magnitude estimate. See the ASAS-SN d iscovery The top left panel shows the reference image, top right shows the DSS image on the same angular scale, lower left is one of the 90-sec V-band images on July 14 and lower right is the first detection image on July 16. Circle with the 15" radius has the same position. The new source is approximately 71.2" South and 73.1" East of the centre of PGC 065535 (86 Mpc) giving it an absolute magnitude of approximately M_V=-19.8 (m-M=34.7, A_V=0.16 and a projected distance from the galaxy centre of approximately 41 kpc. SUPERNOVA 2013cx (THU-NAOC TRANISENT SURVEY) 2013cx May 21.71 17 04 16.05 +41 30 37.6 17.7 1.3"E 0.8"N Xulin Zhao: spectrum May 31 2.16-m at Xinglong station shows type-Ia a week after maximum. SUPERNOVA 2013cy IN ESO 532-25 (MONARD) 2013cy May 31.16 22 10 34.21 -22 39 48.0 16.8 3 "E 26 "S M. Childress: spectrum type-Ia (date not given) SUPERNOVA 2013cz IN IC 4892 (STUART PARKER) 2013cz May 7.60 19 49 32.51 -70 13 20.0 17.9r 4 "E 19 "N Parker posted an image of the variable at website URL http://tinyurl.com/copy6gb M. Childress: spectrum June 3 shows good matches to SN 2005cs at +13 days, SN 2004et at +20 days, and SN 2006bp at +20 days. SUPERNOVA 2013da (ASA-SN) 2013da Jun 5.34 13 45 36.21 -07 19 32.6 16.5 3.3"W 1.2"N OSMOS shows a spectrum (no date) suggesting type-Ia around maximum. SUPERNOVA 2013db IN NGC 3808 (R GAGLIANO ET. AL.) 2013db May 29.15 11 40 43.99 +22 25 54.9 19.0 3.9"W 9.2"N M. R. Drout: spectrum June 6 type-II near maximum. SUPERNOVA 2013dc IN NGC 6240 (ADAM BLOCK) 2013dc Apr 11 16 52 58.97 +02 24 25.2 18.7 25 "N S. B. Cenko: spectrum June 7 type-Ii several weeks past maximum Guy M Hurst