September 11, 2012: As announced in AAVSO Alert Notice 454 (http://www.aavso.org/aavso-alert-notice-454) and updated in AAVSO Special Notices #267 and #268 (http://www.aavso.org/aavso-special-notice-267 and -268), Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) is carrying out a multiwavelength campaign on the symbiotic variable CH Cyg this year. The satellite observations have taken place, and Dr.
CONTINUED THROUGH 2017
August 5, 2012: N. J. Brown (Two Rocks, W. Australia) reported a possible nova in Carina to the IAU CBAT with an observation of magnitude 9.5 photographic made on 2012 July 24.68 UT. The object has been placed on the IAU CBAT TOCP page (http://www.cbat.eps.harvard.edu/unconf/tocp.html) and assigned the name PNV J09410000-5759540.
July 26, 2012: The luminous blue variable (LBV) HDE 269006 = R71 in the Large Magellanic Cloud is brightening and is currently at V magnitude 8.3.
Observations in the AAVSO International Database going back to 1987 show HDE 269006 at visual magnitude ~10.8 until 2006, when it began to brighten, reaching magnitude ~8.5 in late 2009. It then declined to ~magnitude 9 by late 2012, where it has been since then.
July 24, 2012: The blazar BL Lac, the prototype of this class of variable objects, has brightened in the optical and radio wavelengths. ATel #4271 (Sh. A. Ehgamberdiev et al., http://www.astronomerstelegram.org/?read=4271) on July 23 announced this brightening. The ATel team reported that "the source brightness has recently increased from R = 13.66 +/- 0.01 on July 19.82 to R = 12.60 +/- 0.01 on July 22.97.
July 7, 2012: A new, bright (V and unfiltered magnitudes 7-8) object has been independently discovered in Sagittarius by at least four observers. The IAU CBAT TOCP page identifies the object as PNV J18202726-2744263 [V5592 Sgr] and gives the earliest report (Koichi Nishiyama and Fujio Kabashima) date and time of 2012 July 07.4986 UT and their magnitude 7.8 unfiltered CCD.
Coordinates: 18 20 27.26 -27 44 26.3 (2000.0)
June 28, 2012: IAU Central Bureau Electronic Telegram 3155 (Daniel W. E. Green, ed.) announces the discovery (reported by A. Klotz on behalf of the TAROT collaboration) of a supernova in ESO 139-G28 on 2012 June 24.27 UT at R magnitude 14.6 +/- 0.1, using public images of the 0.25-m TAROT robotic telescope at La Silla, Chile.
June 28, 2012: The recently discovered gamma-ray source Swift J1910.2-0546 (Krimm et al., ATel #4139; Barthelmy et al., GCNC #13369; T. Ohshima., vsnet-alert 14674) is optically bright, reaching magnitude CR = 15.7 on 2012 June 14 (R. Pickard, BAAVSS, using the Faulkes Telescope South). The object was also observed by A. Odasso, using the Sierra Stars Observatory Network (A.
8 June 2012: Dr. Christopher Mauche, Lawrence Livermore National Laboratory, has informed us that the timetable of MAGIC telescope observations of the intermediate polar cataclysmic variable AE Aqr announced in AAVSO Alert Notice 458 has been revised. Here is the revised timetable for the dates in June:
REVISED TIMETABLE AS OF 8 JUNE 2012
2012 June
11, 1:43 - 2:26, UT
12, 1:39 - 2:22
13, 1:35 - 2:18
14, 1:31 - 2:34
15, 1:27 - 2:10
6 June 2012: Dr. Koji Mukai (Universities Space Research Association/NASA Goddard Space Flight Center) has requested AAVSO observers' assistance in monitoring the SS Cyg-type dwarf nova RU Peg in support of target-of-opportunity observations with the NASA Swift satellite during an outburst.
His observations will be targeted during the rise to outburst and during late decline from outburst. Thus, your prompt notification to AAVSO Headquarters of activity in RU Peg will be crucial to the success of this campaign.
