Request for observations of V2105 Oph in support of HST observations

Details Request for observations of V2105 Oph in support of HST observations Request for observations of V2105 Oph in support of HST observations

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aan...403....1t&link_type=abstract

AAVSO Alert Notice 403

Computer Science

V2105 Oph, Hst, Multiwavelength Observations, Aavso International Database

Scientific paper

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. Photoelectric observers are asked to obtain nightly V-band photometry of V2105 Oph using SAO 141187 as comparison star and SAO 141066 as check star. For CCD and DSLR observers, please obtain multiple exposures and coadd frames to obtain good signal to noise on nearby faint stars. There are at least four potential comparisons within 30 arcminutes brighter than V=10.2: BD -07 4291, BD -07 4293, HD 148179, BD -07 4289. Please submit observations to the AAVSO International Database as V2105 OPH.

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