[Aavso-photometry] HMXB campaign from Alert Notice 348

[Matthew Templeton]

Hello all,

There's a lot of activity going on at the moment, and the amount of data 
we're getting for GW Lib, BZ UMa, and everything else is fantastic. 
The BZ UMa superhump light curves are beautiful, and we're all looking 
forward to see how GW Lib evolves.

The AAVSO has several projects going on at this time, and those of you who 
can participate in our observing campaigns are encouraged to do so, 
especially right now.

We'd like to send out a plea on behalf of Dr. Gordon Sarty's campaign on 
HMXBs, announced in Alert Notice 348.  Spectroscopic observations of these 
stars are coming up soon, beginning April 4 and continuing through May 2. 
Photometry collected between now and then will be used to further 
constrain the behavior of these objects, so observations are needed now as 
well as during their spectroscopic run.

More information is available on the Alert Notice page, here:

http://www.aavso.org/publications/alerts/alert348.shtml#hm

These high-mass X-ray binaries are all relatively bright (9-10) and at 
high northerly declinations (+47 to +55), so if GW Lib is too far south 
for you, the HMXBs are excellent alternative targets.

Whatever you choose to observe, clear skies & happy observing!

Matthew Templeton, AAVSO