High Energy Network (HEN)

I'd like to draw attention to

http://www.astronomerstelegram.org/?read=14452

which reports "Rapid optical variability of S4 0954+65" .

This object is already well observed by observers here at this moment, but in the light of this ATEL , if you have the time to do it, some higher cadence observations (more than one data point per night) may be useful for future research.

Clear Skies

HB

As a fun thing I was randomly looking for distant but still  kind of bright objects of HEN interest that already have AAVSO observations logged, and found 4C 71.07 a.k.a S5 0836+71 

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=4C+71.07

A series of recent ATELs indicates that the pros are very excited about BL Lac lately:

http://www.astronomerstelegram.org/?read=14328 "The flaring blazar BL Lacertae observed below R=11.5, a new record for its optical brightness"

http://www.astronomerstelegram.org/?read=14329 "Erratum to ATel #14328"

http://www.astronomerstelegram.org/?read=14330 "Fermi-LAT gamma-ray flare in BL Lacertae contemporaneous with optical flaring activity"

http://www.astronomerstelegram.org/?read=14334 "Multicolor-optical observation of the flaring blazar BL Lacertae"

See ATEL http://www.astronomerstelegram.org/?read=14310

In the AAVSO DB, the object is identified as "3C 279" (mind the space!), not 3C279 as in the ATEL.

Cheers

HB

Adolfo Darriba M1 Group (Spain) has indicated that Quasar QSO B0506+056 is in outburst. He recently observed mag 14.1 and has requested that AAVSO members monitor this object to see what it will do. Thank you.

Dave

Hi All,

Given the clear connection between CVs and X-ray binaries, I wanted to make this announcement.

Interested in some of my team's recent results? Join my Zoom presentation of a Colloquium for the University of Alberta Physics Department this Friday. Please note that this talk was designed with undergraduate Physics students in mind!!

Title: Winds of Change around Black Holes

Presenter: Gregory Sivakoff (University of Alberta)

Time: Friday, September 25 3:00 PM Mountain Time (US and Canada)

Blazar S5 1803+78 is rapidly brightnening. Observers in Spain and Germany have contributed recent observations, but the weather in Europe has been overcast and probably will be until at least this weekend. Observations outside of these areas are encouraged until the weather clears. The next several days may be critical as the blazar seems to be reaching a peak magnitude. Please make observations if possible and upload to light curve for S5 1803+78.

Thanks.

Dave (HDHA)