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From John Greaves: === Hello there >From 2MASS J-Ks and Tycho2 B-V values it seems that this star is of around spectral type middle to late A, although there might be slight reddening of both, given the field. This could suggest that you found an EA type eclipsing binary, given the amplitude of variation. There appear to be eleven observations available for this star at the TASS Mark IV online database http://sallman.tass-survey.org/servlet/markiv/template/Download.vm which show it fairly stable around 11.3 +/- 0.1 over quite a few nights, which helps support the thought that you have been lucky enough to catch an EA star, that normally remains at a stable maximum, whilst it was in eclipse ;^) The TASS V-Ic colour is also appropriate for a star of mid to late spectral type A. [Note: the TASS Mk IV database is an online reservoir of observations that often have not been examined in anyway, and it therefore in no way affects your discovery accreditation. It is similar to the more familiar ASAS3 in that way. Indeed, the TASS cameras were not lucky enough to catch the star in eclipse on any one of their eleven observations logged so far]. If it is an eclipser, these observations: > HadV111 20030918.449 <122p Had.VSOLJ > HadV111 20030926.445 123p Had.VSOLJ suggest it should have eclipsed last night, ie ~20031004.44, also, if I have got my arithmetic correct! This does not necessarily mean the period is 8 days, it could just be a factor thereof. Secondary eclipses may, or may not, also exist. Cheers John John Greaves (NB it seems that the 10.8p observation may be a little too bright. The 11.5/6 observations are appropriate in comparison to TASS V and Tycho2 BT and VT values)
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