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OEJV#	Publication's title	Author	Date
	Abstract / note


0067	Two new variable stars in the field of the Transiting Extrasolar planet TRES-1 (GSC 2652-1324) 1432 kB	F.-J. HAMBSCH	2007-09-12
	Two new variable stars (HMB09 = USNO-B1.0 1265-0306001 and HMB10 = USNO-B1.0 1267-0324775) have been identified in the field of the host star of the transiting Extrasolar planet TRES-1 (GSC2652-1324). The third star showing variability is already known under the abbreviation Pej025 = IBVS 5700-40 as found in the VSX database of the AAVSO. Full light curves for all the three stars are presented. The form of the light curve indicates that all the three stars are EW type variable stars. For HMB09 a period P = 0.579289 +/- 0.000056 [d] with the epoch E0 = HJD 2454249.977 and an amplitude of the light variation of dm = 0.400 +/- 0.005 mag. has been found. For HMB10 a period P = 0.337262 +/- 0.000037 [d] with the epoch E0 = HJD 2454249.940 and an amplitude of the light variation of dm = 0.25 +/- 0.05 mag. has been found. And finally for Pej025 a period P = 0.300374 +/- 0.000021 [d] with the epoch E0 = HJD 2454249.495 and an amplitude of the light variation of dm = 0.30 +/- 0.02 mag. has been found. For the latter the period has been significantly improved compared to the one given in VSX. Simbad object(s): GSC2 N030320055368, USNO-B1.0 1267-0324775, USNO-B1.0 1265-0306001,		comments: 0

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