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AAVSO International Database

Special Notice #251: Possible transient in Scorpius

September 6, 2011: John Seach (Chatsworth Island, NSW, Australia) reports the detection of a transient object in Scorpius, having a magnitude of 9.8 on 2011 September 6.37 UT (JD 2455810.87).  Observations were made with a DSLR and 50mm f/1.2 lens and 5 second exposure, with limiting magnitude 10.5.  The object is visible on four separate frames taken after the discovery was made.  No object appears at the location of the transient on an image taken 2011 September 5.36 UT.

Alert Notice 446: Supernova 2011‭fe ‬in M101‭ (‬NGC 5457‭) = ‬PSN J14030581+5416254

August 26‭, ‬2011

Discovered by‭:  ‬The Type Ia supernova science working group of the‭ ‬ Palomar Transient Factory‭:  ‬Peter Nugent‭, ‬Lawrence Berkeley National‭ ‬Laboratory‭ (‬LBL‭), ‬University of California at Berkeley‭; ‬Mark‭ ‬Sullivan‭, ‬Oxford University‭; ‬David Bersier‭, ‬Liverpool John Moores‭ ‬University‭ (‬LJMU‭); ‬D‭. ‬A‭. ‬Howell‭, ‬Las Cumbres Observatory Global‭ ‬Telescope Network Inc‭., ‬University of California at Santa Barbara‭; ‬Rollin Thomas‭, ‬LBL‭; ‬Phil James‭, ‬LJMU

Special Notice #249: FTP site for submitting AGN images requested in Alert Notice 443

August 19, 2011: As announced in AAVSO Alert Notice 443, Dr. Misty Bentz (Georgia State University) requests observations of four active galactic nuclei (AGN) for a study of variability in these sources by the STARE Collaboration. She requests BVRcIc filtered photometry of NGC 6814, NGC 7213, NGC 7469, and NGC 1566 from July 10, 2011, to November 1, 2011. She also requests that observers submit their images for analysis. An FTP site has been created for this purpose.

Alert Notice 444: Nova Lupi 2011 [PR Lup]

August 9, 2011

Event: Nova in Lupus  -  Nova Lupi 2011   =  PNV J14542000-5505030  [PR Lup]

Discovered by: Nicholas Brown, Quinns Rocks, Western Australia  [vsnet-alert 13560]

Discovery Date: 2011 August 4.73 UT

Discovery Magnitude: magnitude 10.2 photographic unfiltered, on two films, using a 135F2 cannon lens and tmax 400 film

Special Notice #245: Outburst of SV Ari

August 2, 2011:  SV Ari, a suspected WZ Sge star, has gone into outburst.  Rod Stubbings posted a 15.0 magnitude estimate on 110802.788 that has been confirmed by Gianluca Masi.  Gary Poyner says:

"Discovered by M & G Wolf on Heidelberg plates taken in November 1905 at mag 12.0p.  Kimpel & Jansch reported a possible sighting in September 1943, but this was not confirmed.  Nothing has been seen since."

Special Notice #244: Continued close monitoring of T Pyx requested

Continued close monitoring of T Pyx requested

June 30, 2011: Since its outburst on 2011 April 14 (see AAVSO Alert Notice 436), the recurrent nova T Pyx has been very well monitored by visual and instrumental observers who can reach -32o. Thank you! Currently T Pyx is visual/V magnitude ~8.3.

Alert Notice 442: Nova Scorpii 2011 = PNV J16551100-3838120 [V1312 Sco]

June 3, 2011

Event: Nova Scorpii 2011 = PNV J16551100-3838120  [V1312 Sco]

Discovered by: John Seach, Chatsworth Island, NSW, Australia

Discovery Date: 2011 June 1.40 UT

Discovery Magnitude: magnitude 9.5 on three CCD images (limiting
mag 11.0) taken with a digital SLR camera (+ 50-mm f/1.2 lens
+ orange filter).  

Coordinates: R.A. = 16:55:11, Decl. = -38:38:12 (equinox 2000.0)

Special Notice #240: Possible Nova in Scorpius [V1312 Sco]

June 1, 2011: John Seach (Chatsworth Island, NSW, Australia) has identified a transient object on 3 images taken with a digital SLR camera. The coordinates are: RA 16 55 11 Dec -38 38 12 J2000 The discovery magnitude on June 1.40UT was 9.5 No object was seen on images taken the previous night, and no minor planet, comet or variable star is known at that position. He also does not see any DSS object at those coordinates. Confirmation of this object is requested.

Special Notice #239: Dwarf Nova in Pegasus (PNV J21095047+1348396)

May 31, 2011: IAU Central Bureau for Astronomical Telegrams Electronic Telegram CBET 2731 (Daniel W. E. Green, ed.) announces the discovery by K. Itagaki, Yamagata, Japan, of a dwarf nova in Pegasus (reported by H. Yamaoka, Kyushu University, Japan) on 2011 May 24.672 UT at unfiltered CCD magnitude ~11.5. Spectroscopy by Akira Arai, Koyama Astronomical Observatory, Kyoto Sangyo University, Japan, on 2011 May 25.67 UT, and by D. D. Balam, Dominion Astrophysical Observatory, National Research Council of Canada, M. L.

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