======================================== AAVSO Special Notice #56 N Vul 07 August 9, 2007 N Vul 07 (CBET 1027, AAVSO Special Notice #55) is most likely a nova; high-resolution spectra are being analyzed to confirm the object's nature. An AAVSO Alert Notice will be issued later, but the purpose of this special notice is to inform observers that: - N Vul 07 (19:54:24.64 +20:52:51.9 (2000.0)) has been added to the AAVSO files as 1950+20 N VUL 07. - An AAVSO chart with photometry by Richard Miles may be obtained from the AAVSO Variable Star Plotter (VSP) by going to http://www.aavso.org/observing/charts/vsp/ and entering 1950+20 or N VUL 07. - Observations reported to the AAVSO indicate that N Vul 07 is continuing to brighten: AUG 08.9604 UT, 9.30 CCD (based on USNO A2.0), D. Rodriguez, Madrid, Spain; 09.0056, 9.3 (based on Tycho magnitude), S. Swierczynski, Dobczyce, Poland; 09.0486, 9.0, Swierczynski; 09.0590, 9.4 (AAVSO RS Sge comparison sequence), G. Chaple, Townsend, MA; 09.0931, 8.7, M. Komorous, London, Ontario, Canada; 09.1111, 8.7 (GSC 1625-855 (8.6), GSC 1629-594 (9.0)), L. Shotter, Uniontown,PA; 09.1875, 8.4 (based on Tycho magnitudes), R. King, Duluth, MN; 09.2083, 8.7 (GSC1628-1232 (8.4), GSC1628-214 (9.1), J. Bortle, Stormville, NY; Tim Crawford, Arch Cape, OR, reports V photometry (using Richard Miles' value of 9.802V for comparison star TYC 1628 0666): Aug 09. 19576 UT, 8.368; .21751, 8.349; .24450, 8.361; .27008, 8.344; .38532, 8.223; .40890, 8.178; .43109, 8.143. Please submit your observations of N VUL 07 to the AAVSO via WebObs as soon as possible after you make them. Please be sure to include the comparison stars used. Many thanks and good observing! This special notice was compiled by: Elizabeth O. Waagen =========================================== From: BAA mailing list <baalist@nickdjames.com> Save Address | Headers To : baalist1@saturn.astronet CC : Date : Fri, 10 Aug 2007 00:36:09 +0100 Subject : [BAA 00303] Alert! - Nova Vulpeculae 2007 -------------------------------------------------------------------------------- ====================================================================== BAA electronic bulletin No. 00303 http://www.britastro.org/ ====================================================================== In CBET Electronic Telegram No. 1027, received at 22:02UT on August 08, S. Nakano, Sumoto, Japan, reported the discovery of a possible nova by Hiroshi Abe (Yatsuka-cho, Matsue, Shimane-ken, Japan) on survey frames taken around Aug. 8.54UT using a Canon EOS Kiss Digital Camera (+ 35-mm f/2.8 Pentax lens). Early measurements showed the object to be about magnitude 9.4-9.5. By Aug. 9.00, the V magnitude had brightened to about 8.9 (R. Miles) and at Aug. 9.27 the nova had reached 8.3 (N. James, T. Crawford). Robin Leadbeater from spectra he recorded last night has confirmed the nova, which is located at RA 19 54 24.63 Dec. +20 52 52.1 as measured by Nick James. At 21:30UT this evening, the nova had already embarked on its apparent decline at a rate in excess of 1 mag/day whilst at the same time reddening in colour. I have established a comparison star sequence based on measurements of the following Tycho stars: 1628-1075 V=8.83, V-I=+1.40 1628-0666 V=9.80, V-I=+1.18 1628-0130 V=9.50, V-I=+0.48 1628-0527 V=10.24, V-I=+0.24 1628-1171 V=10.15, V-I=+0.14 Observers are encouraged to monitor this object using one or more of the above stars. The latest data I have show that at 22:30UT the nova had reached V=8.34 and was fading at a rate of 0.8 mag/day. Richard Miles _______________________________________________ Sent via CSolutions - http://www.csolutions.net