AAVSO Special Notice #403
April 16, 2015
GW Lib HST schedule set
Further to AAVSO Alert Notice 513
(http://www.aavso.org/aavso-alert-notice-513), Dr. Paula Szkody (University of Washington) informs us that the HST observations for the cataclysmic variable GW Lib have been scheduled for
2015 April 22 04:04:36 - 09:00:06 UT.
Dr. Szkody writes: "[As] the times are UT, the simultaneous obs will be the night of Apr 21/22 and the critical time for a ground confirmation of quiescence will be the night of Apr 20/21. I see the observers have stepped up and nightly obs are coming into the web site. Please give my thanks when you send out the final times!"
AAVSO observations are needed to ensure that GW Lib is NOT in outburst when observed with HST. Please continue monitoring GW Lib nightly until April 19, then intensively April 19-23, and then nightly again through May 2.
Coordinates: RA: 15 19 55.45 , Dec: -25 00 25.30 (J2000.0)
Please submit observations of GW Lib as soon as possible to the AAVSO International Database using the name GW LIB. During the nights of April 19-20, 20-21, and 21-22, prompt submission of your observations will be critical. In the event of an outburst, please contact the AAVSO immediately.
Charts for GW Lib may be plotted using the AAVSO Variable Star Plotter (VSP, http://www.aavso.org/vsp).
Thank you for your observing efforts and valuable observations!
This AAVSO Special Notice was prepared by Elizabeth O. Waagen.
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GW Lib HST schedule set
Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
solar research, comet observation, astrometry, etc.
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