[Aavso-photometry] Alert Notice 348: HMXBs

[Matthew Templeton]

Hello all,

This is just a friendly reminder about the HMXB campaign currently 
underway.  Dr. Gordon Sarty and Rick Huziak are currently onsite at 
Dominion Astrophysical Observatory attempting to obtain spectroscopy of 
several bright high-mass X-ray binaries.  These might be good targets for 
you if the various CVs that have gone off recently are too faint or too 
southerly for you to reach.  BVRI time-series CCD observations are 
especially valuable, and these are all around 10th magnitude. 
Observations during *and* after the end of their DAO observations (on May 
3) are needed.

A page with Dr. Sarty's stars and charts is at this URL:

http://www.usask.ca/psychology/sarty/AAVSO_HMXB_Charts.html

The stars of particular interest now are marked "DAO spectroscopy star" on 
that webpage.  When you observe any of these stars, please post here to 
aavso-photometry letting everyone know your target, filters, and 
approximate start and end times.

As always, thanks for participating in this and other AAVSO campaigns!

Clear skies,

Matthew Templeton
AAVSO