SRG 1621-47

Abstract

We have analyzed 9200 s of RXTE pointed observations made on June 26 of SGR 1627-41 (IAUC 6944), which were centered on the possibly-associated supernova remnant G337.0-0.1 (cf. IAUC 6948, 6950). We detected one burst, confirming flux detection from the new source and strengthening the association of the two sources. Power spectral analysis of the observations reveals a quasi-periodic oscillation (QPO) peak centered at 0.15 Hz (about 6.7 s), with a r.m.s. of at least 3.2 percent, depending upon background and source contributions to the signal. Also within the RXTE field-of-view is the black-hole candidate 4U 1630-47, from which QPOs have been observed (IAUC 6823). However, no QPOs near the above frequency have been reported, and the intensity of 1630-47 was low during our observations. Further observations are required to determine which source is the origin of the QPO."