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COS

Special Notice #371: BB Ari observations particularly crucial now

September 24, 2013: HST/COS is scheduled to observe the SU UMa-type variable BB Ari:

BB Ari  2013 September 27 03:01:26 through 06:29:37 UT

The HST scheduling team will likely make their final decision early on September 26, so your observations are essential NOW.

Special Notice #369: GZ Cet (SDSS J013701.06-091234.9) HST/COS obs next week

September 5, 2013: HST/COS is scheduled to observe the WZ Sge-like SU UMa variable GZ Cet (SDSS J013701.06-091234.9) next week. Observations are scheduled for:

GZ Cet  2013 Sep. 13 12:24:02 through 19:06:54 UT

Special Notice #365: Correction to AAVSO Special Notice #364

July 19, 2013: In AAVSO Special Notice #364 (http://www.aavso.org/aavso-special-notice-364)
the variable 1RXS J213807.1+261958 (OT J213806.6+261957) was stated as being the northern of the pair. It is in fact the SOUTHERN of the pair, and is moving to the northeast.

The coordinates given in Special Notice #364 were correct and are repeated here for your convenience.

Special Notice #364: 1RXS J213807.1+261958 (OT J213806.6+261957) HST obs next week

July 19, 2013: HST/COS is scheduled to observe the WZ Sge-type variable 1RXS J213807.1+261958 (= OT J213806.6+261957) next week. Observations are scheduled for:

1RXS J213807.1+261958 (OT J213806.6+261957)
            2013 July 25 17:26:50 through 21:05:23 UT

The scheduling team will likely make their final decision early on July 24, and your observations will be essential now through July 26.

Special Notice #363: HS 2214+2845 (= V513 Peg) obs critical now

July 16, 2013: Based on your observations, the HST/COS team will be making the final decision tomorrow afternoon (2013 July 17) or the next morning whether to observe the dwarf nova HS 2214+2845 = V513 Peg on:

V513 Peg (HS 2214+2845) 2013 July 18 21:08:59 through July 19 01:04:23 UT

V513 Peg is 16.8V at minimum and 12.5V at maximum. Please monitor V513 Peg closely through July 19.

Special Notice #362: OR And and AX For obs critical now

July 8, 2013: The VY Scl variable OR And continues in its low state, so it has been scheduled for HST/COS observations. Based on your observations, the HST/COS team will be making the final decision tomorrow morning (2013 July 9) whether to observe OR And on:

OR And 2013 July 10 11:47:01 through 15:56:12 UT

OR And is ~18V in its low state and ~14.5V in its high state.

HST/COS is scheduled to observe the SU UMa variable AX For on the next day:

Special Notice #361: CC Scl observations DATE REVISED

June 24, 2013: The date given in AAVSO Special Notice #360 for the HST/COS  observations of the SU UMa-type dwarf nova CC Scl has been REVISED from June 27 to:

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