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Special Notice #307: Observations crucial tonight for SDSS J001153.08-064739.1

November 8, 2012: The HST COS far ultraviolet observations of the dwarf nova SDSS J001153.08-064739.1 have been scheduled for 2012 November 9 20:42:29 UT through November 10 04:57:33 UT (AAVSO Special Notice #304).

Your observations from tonight are crucial to confirm whether the target is at minimum (which it must be for HST to observe it).

Coordinates:  R.A. 00 11 53.08     Dec. -06 47 39.2     (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. This target is likely too faint for positive visual observations, but if possible they are welcome, as are visual fainter-than observations fainter than magnitude 15.0.

Charts for SDSS J001153.08-064739.1 may be created using VSP (

Please report observations promptly to the AAVSO International Database using the name SDSS J001153.08-064739.1. If you see the target in outburst, please contact the AAVSO immediately and post a message to the Observations and Campaigns & Observations Reports forum.

Thank you for your contributions and good observing.

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.


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