ROSAT observations of supernova remnant N49

Details ROSAT observations of supernova remnant N49 ROSAT observations of supernova remnant N49

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..366..102m&link_type=abstract

High velocity neutron stars and gamma-ray bursts. AIP Conference Proceedings, Volume 366, pp. 102-107 (1996).

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Supernova Remnants, Magellanic Clouds And Other Irregular Galaxies, X-Ray

Scientific paper

The supernova remnant N49 in the Large Magellanic Cloud was observed in soft X-rays using the High Resolution Imager aboard the ROSAT satellite. An image of the entire nebula in the 0.1-2.4 keV bandpass was obtained, with a mean counting rate of 0.777+/-.004 counts s-1 and a total livetime of ~50000 seconds. Image analysis determined the position of the X-ray hotspot (RX 0525-6604), coincident with the error box of the soft gamma-ray repeater 0525-66, to be R.A.(J2000)=5hr26m0.55s and Dec(J2000)=-66°4'35.56'' with an uncertainty of 5'' in radius, due almost entirely to the ROSAT pointing uncertainty. We have searched for periodicity in the signal from RX 0525-6604 in the period range 7.5 to 8.5 s, the approximate period observed from this source during the March 5, 1979 gamma-ray burst. No evidence for ~8 s periodicity from RX 0525-6604 was found, and the upper limit on the pulsed fraction was determined to be 66%, for pulse profiles typical of X-ray pulsars.

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