AAS 205th Meeting, 9-13 January 2005
Session 141 Our Friendly Neighbors: M31 and M33
Poster, Thursday, January 13, 2005, 9:20am-4:00pm, Exhibit Hall

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[141.11] Cataloging Radio Point Sources in the Center of M31.

K. M. Hess (Department of Physics, Cornell University)

X-ray observations of the nucleus of M31 with the Chandra X-ray Observatory have led to the detection of 3 sources separated by only a few arcseconds, that, at various times, have been identified as the super massive black hole, M31*. From recent observations of the central 10 arcminutes of M31 with the Very Large Array (VLA) at 6 cm, 312 point sources are detected, including M31*. They are cataloged and compared to 3.6 cm VLA archive, 20 cm VLA survey, H\alpha and [SII] survey data. An attempt is made to determine the relative astrometry between the Chandra observations and the VLA observations to identify M31* from among the X-ray candidates. Supernova SN1885A lies less than an arcminute from the core of M31. It creates a striking absorption feature in Hubble images. However it has not previously been detected at radio wavelengths. Observations confirm no radio emission from the remnant of supernova 1885A in M31, and upper limit of 15 \muJy is determined for the flux density at 6 cm, and 12 \muJy at 3.6 cm. We gratefully acknowledge support from the NSF Research Experience for Undergraduates program.

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