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AAVSO Special Notice #199: Request for monitoring of GW Lib in support of HST Observations AAVSO HOME > publications > special notice

AAVSO Special Notice #199

Request for monitoring of GW Lib in support of HST Observations
March 8, 2010

Further to Alert Notice 417, the AAVSO requests intensive monitoring 
observations of the cataclysmic variable GW Librae beginning immediately 
(2010 March 9.0 UT; JD 2455264.5) and continuing through 2010 March 12.5 
(2455268.0).  These observations are in support of the Hubble Space 
Telescope Cosmic Origins Spectrograph observations of GW Lib planned for 
2010 March 11 UT.  Space Telescope ground controllers will need to know 
that GW Lib is fainter than V=15 in order to proceed with the planned 
observations.  Observers are asked to observe GW Lib during the next 48 
hours and report their observations promptly to the AAVSO using WebObs 
if at all possible.  Please contact Dr. Matthew Templeton at to report your observations if it is not possible for 
you to use WebObs, or if you have not been assigned an AAVSO observer 
code.  We request that intensive observations continue until at least 
2010 March 12.5 UT before returning to a normal schedule of observations 
of this star.

GW Lib is located at the following (J2000) coordinates:

	RA: 15 19 55.45 , Dec: -25 00 25.30

Charts for GW Lib may be plotted using AAVSO VSP:

Please report all observations of GW Lib to the AAVSO using the name

This AAVSO Special Notice was prepared by Matthew Templeton.


Information on submitting observations to the AAVSO may be found at:


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