October 6, 2012: The BL Lac object 4C 11.69 (== CTA 102) was discovered in bright outburst by V. Larionov, D. Blinov, and S. Jorstad (St.
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.
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.
November 18, 2010: As was noted by AAVSO observer E. Erdelyi (Carlsbad, CA, USA) in a post to cvnet-discussion, the BL Lac object 3C 454.3 (AUID 000-BDC-612) appears to be undergoing a bright flare; the object was recorded by Erdelyi at V=13.659(0.013) on 2010 November 10.2708 (JD 2455510.7708). The last flare of comparable brightness was observed in 2007, when the object reached V ~ 13.4 around JD 2454335 (late August 2007).
The AAVSO has held three Professional-Amateur meetings in collaboration with NASA, Sonoma State University, and New Mexico State University
HEA Workshop Schedule
American Association of Variable Star Observers
HEA Workshop Attendee List
|William Alexander||Huntington, WV|
|William Aquino||Wheatfield, NY<|
HEA Workshop Announcement
Sponsored by: NASA/Marshall Space Flight Center and
The American Association of Variable Star Observers
April 13-14, 2000
Huntsville Marriott Hotel, Huntsville, Alabama
Spring 2000 Photo Gallery
Below are some pictures from the AAVSO Spring 2000 meeting and HEA workshop. Most of the pictures were taken at the AAVSO banquet.