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Query object by Cucarella We have received the following query on a bright transient stellar object(?). The images have been posted at: http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/others/Cucarella/ Could someone identify the nature? Regards, Taichi Kato === Dear colleagues: I send you two CCD images of an unexpected object observed the past July 17th while I was completing a program of search and characterization of new variable stars. I was surprised by a new bright star that appeared in a picture but this star wasn't visible neither in the preceding images nor the following ones (that night I took more than 300 images and I'm currently analysing them). This object cannot be an asteroid nor a known variable star because there's not an object in the Guide 5 Catalogue nor the Simbad Database. Because this phenomenon is very brief (less than one minute), I suspect that it could be the optic counterpart of a Gamma Ray Buster, but I have no news of recent GRB's near this position. Could you confirm or reject this observation, please? I have been observing variable stars for more than ten years (visual) and making CCD-photometry only for a few months, but I'm self-confident with these observations. The information about the pictures: Gea1015p-0059: 60" exposure between 21:54:32 and 21:55:32 UT Gea1015p-0060: 60" exposure between 21:55:50 and 21:56:50 UT Position of the object (epoch J2000.0): Alpha: 20h 41' 15.8" Delta: +21o 26' 41.3" Telescope: Newton, D=3D150mm f=3D750 mm CCD: Starlight Xpresss MX5 camera with a Johnson V filter. Observer: Francisco Campos Cucarella City: Vallirana (Barcelona, Spain) Yours faithfully,=20 Francisco Campos Cucarella francacu@ya.com
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