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Special Notice #233: Bright outburst of the cataclysmic variable SDSS J133941.11+484727.5

February 7, 2011: The star SDSS J133941.11+484727.5 has been reported in outburst by Jeremy Shears (Bunbury, UK).  Shears reports this star at magnitude 10.4 on 2011 February 7.919 (JD 2455600.419).  This is approximately 7 magnitudes above quiescence, which suggests a superoutburst of an SU UMa star or a WZ Sge-like outburst.  Gary Poyner (Birmingham, UK) confirms this outburst, estimating the star at 10.5 on February 7.959 (2455600.459).

New Sequence for SN2011B

There is now a sequence available for SN2011B. 

You will need to specify the coordinates (I used 08 55 48.50 +78 13 02.7 from the discovery telegram) to plot a chart, or you can simply download this E scale DSS image chart and print it.

Enjoy!

Special Notice #231: T Pyx Observations Requested

February 1, 2011: Sumner Starrfield (Arizona State University) has informed us that Chandra is currently observing the cataclysmic variable T Pyx.  He and his colleagues would like supporting optical monitoring of the star during the visitation.  One visit is happening now; the next and final visit will occur on February 5 (UT).

Special Notice #230: Nova Sagittarii 2011 = PNV J17474639-2335112 [V5587 Sgr]

January 31, 2011: Central Bureau for Astronomical Telegrams Electronic Telegram No. 2644 (CBET 2644, Daniel W. E. Green, ed.) announces the discovery by Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan (reported by S. Nakano, Sumoto, Japan), of a nova [V5587 Sgr] in Sagittarius on 2011 Jan. 25.86 UT at unfiltered magnitude 11.2 on two 15-s CCD frames with limiting magnitude 12.5; Nakano measured magnitude 11.4 +/- 0.6 on Nishimura's frames.

Monday System Maintenance

This Monday, 31 January 2011, at 12:00ET (17:00UTC) the AAVSO Website will be down for one hour to look into the installation of a Wide Area Network Router which, if successful, will combine the two internet feeds we have here at HQ into one which will allow us to seamlessly increase both our incomming and outgoing data rates.

Any questions or concerns can be sent to Doc Kinne at rkinne @ aavso.org.

Special Notice #229: Outburst of FS Aurigae

January 24, 2011: Further to AAVSO Alert Notice 428 (2010 Nov 30), the dwarf nova FS Aurigae appears to be in outburst.  The outburst was detected by P. Lake (Wonga Park, Victoria, Australia) at V=14.332 on 2011 Jan 24.0902 (JD 2455585.5902), and confirmed shortly after by R.

Trivia Leaderboards Added

We've created leaderboards for the Centennial Trivia Challenge! Check them out to see how people are doing. Don't forget to answer today's question, either!

Special Notice #228: Supernova 2011K in anonymous galaxy is Type-Ia pre-maximum

January 14, 2011: We have been informed by the Central Bureau for Astronomical Telegrams (CBET 2636, Daniel W. E. Green, Ed.) that A. J. Drake, California Institute of Technology, et al. report a Catalina Real-Time Transient Survey discovery of a supernova in a faint anonymous galaxy in Catalina Sky Survey unfiltered images on January 13.19 UT at magnitude 15.1.

Coordinates: 04:45:30.38  -07:20:52.7  (J2000.0)

Offset: 2" South of the galaxy center

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