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HST

Alert Notice 403: Request for observations of V2105 Oph in support of HST observations

August 30, 2009

 

Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable V2105 Oph beginning immediately.  These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope on Wednesday, September 2, 2009.  Observations are requested to continue through Sunday, September 6, 2009.

Alert Notice 405: Request for observations of NSV 99 (khi Peg) in support of HST observations

October 2, 2009
 

Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable NSV 99 (= khi Peg) beginning immediately.  These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope in late October and late November 2009. Observations are requested to continue through the end of November 2009.

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.

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