Special Notice #321: Observations critical tonight for SDSS J093249.57+472523.0
January 10, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #319 (http://www.aavso.org/aavso-special-notice-319), tonight's observations of SDSS J093249.57+472523.0 will be critical, as sometime tomorrow (January 11) the scheduling team will make the final decison about going ahead with the HST COS observations planned for
2013 January 11 21:18:00 through January 12 02:57:19 UT
PI Dr. Boris Gaensicke requests that if at all possible, please try to get some V-band images of this target tonight. Assuming the satellite observations go ahead January 11-12, please give this object high priority throughout the observing window, as instructed below.
Coordinates for SDSS J093249.57+472523.0: R.A. 09 32 49.58 Dec. +47 25 23.2 (2000.0)
As instructed in AAVSO Alert Notice 471, for CCD observers, simultaneous photometry [shortly before, during, and after the HST observations] would be ideal. B filter would be best for a light curve, although for the magnitude estimates, a V measurement would be best. An uninterrupted light curve would be better than cycling between filters. At 17.9V at minimum (unknown at maximum), SDSS J093249.57+472523.0 is most likely too faint for positive visual observations at minimum. If positive visual observations are possible, however, they are welcome, as are visual fainter-than observations fainter than magnitude 15.0.
Charts may be created using VSP (www.aavso.org/vsp).
Please report observations as soon as possible to the AAVSO International Database as SDSS J093249.57+472523.0. If an outburst is detected, please report observations immediately. Many thanks!
This AAVSO Special Notice was compiled by Elizabeth O. Waagen.
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
SPECIAL NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
A Special Notice archive is available at the following URL:
Subscribing and Unsubscribing may be done at the following URL:
Last Updated: January 10, 2013 - 4:55pm