March 4, 2011: Further to AAVSO Alert Notice 431, Dr. Paula Szkody, University of Washington, informs us that the time of the HST observations of SDSS074545 has been set for 5:22-9:32 UT on 2011 March 13. This is Saturday night March 12/13. The ground observations to confirm that the object is not in outburst - and allow the HST observations to take place - will then need to take place on Friday, March 11/12.
January 11, 2011: Dr. Kirill Sokolovsky (Max-Planck-Institut fuer Radioastronomie, Bonn) has requested the assistance of AAVSO observers to obtain optical photometry of the blazar-type quasars 3C 273 and 3C 279 during 2011. The observations obtained by AAVSO observers will be combined with multiwavelength observations - from radio to gamma-rays - as well as with very long baseline interferometry with the VLBA to obtain a better picture of what these objects are and how they vary.
December 4, 2010: Further to AAVSO Alert Notice 428, the star FS Aurigae appears to be entering outburst. The star was in quiescence on 2010 December 3.22 (JD 2455533.72; V = 16.3, G. Lubcke) but had risen to V=14.9 on 2010 December 4.23 (JD 2455534.73; R. Campbell). Subsequent observations by H. McGee and A. Novichonok have confirmed that FS Aur is rising. Time series observations of FS Aurigae are encouraged at this time; any and all filters may be used including clear, but V filter is preferred.
HMXB campaign extended until further notice. - Elizabeth O. Waagen, 17 April 2020
It has been updated numerous times and covered in AAVSO Alert Notices 348, 354, and 377, and in AAVSO Special Notices #118, #129, #143, #213, and #220.
HMXB campaign extended until further notice. It has been updated numerous times and covered in AAVSO Alert Notices 348, 354, and 377, and in AAVSO Special Notices #118, #129, #143, #213, and #220.
