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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2406 SUBJECT: XRF 030824: observations at CFHT DATE: 03/10/05 11:57:54 GMT FROM: Michel Boer at CESR-CNRS <Michel.Boer@cesr.fr> A. Klotz, F. Malacrino, J.L. Atteia, M. Boer (CESR-LAT/OMP Toulouse), D. Fox, M.P. Hunt (Caltech), and C. Veillet (CFHT) communicate: We observed the error box of XRF 030824 (HETE 2821) with MEGAPRIME at the Canada-France-Hawaii Telescope, and i' filter, on September 21, 7h56 UT (two 300 sec exposures). This XRF has a relatively low "pseudo-z" (see Atteia, 2003, A&A, 407, L1), and we were looking for the possible rise of an associated type Ib,c supernova. Comparison with frames acquired at the 200-inch Hale Telescope and Large- Format Camera on Mt. Palomar (Fox and Hunt GCNC # 2364 and 2369) reveals two new objects at the following J2000.0 coordinates: Object 1: 0h05m12.30s, +20d06'29.4" +-0.2", i'=22.7+-0.2; no host galaxy detected. Object 2: 00h05m06.82s +20d05m00.4s +-0.4", i'=22.6+-0.4; offset from apparent host anonymous galaxy 0.56"W and 0.55"N, host magnitude i' = 21.5+-0.2 . While the objects are visible on both CFHT i' frames, they are not visible on Palomar images. No catalogued asteroid is associated with any object on the frames. Given the wide area scanned, these objects may be supernovae not associated with the GRB, or TNOs, or one of them can be associated with XRF 030824. Images and first analysis of the frames are available at the following URL: http://www.cesr.fr/~klotz/grb030824/cand.htm New observations are underway at CFHT. This message is citable
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