THE X-RAY-EMISSION OF 1SAX J0651.6-970805 FIELD(7910, A SERENDIPITOUSSOURCE IN THE GRB)

The present the BeppoSAX LECS and MECS observation of a serendipitous source in the GRB970508 field. At variance with 1SAX J0653.8+7916, the other source in the field, this source is outside the WFC error box o f the GRB 970508. The light curve of the source does not show evidence of variability: it is therefore not correlated with the GRB event. Th anks to the long exposure time, about 38000 sec in LEGS and 137000 sec in MECS, we were able to study the source spectrum in detail and it i s consistent with a spectrum emitted by a stellar corona. We associate the observed X-ray source with the RASS X-ray source 1RXS J065213.8+7 90855 and with the star CCDM J06522+7909A (M-B=13.0).