Astrophys. J., 559, L131-L134 (2001/October-1)
The compact central object in the RX J0852.0-4622 supernova remnant.
PAVLOV G.G., SANWAL D., KIZILTAN B. and GARMIRE G.P.
Abstract (from CDS):
The central region of the recently discovered supernova remnant (SNR) RX J0852.0-4622 was observed with the Advanced CCD Imaging Spectrometer detector aboard the Chandra X-Ray Observatory. We found only one relatively bright source, about 4' north of the SNR center, with a flux of ∼2x10–12 ergs.s–1.cm–2 in the 0.5-10 keV band. The position of this pointlike source, CXOU J085201.4-461753, rules out its association with the two bright stars in the field, HD 76060 and Wray 16-30. Observations of the field with the Cerro Tololo Inter-American Observatory 0.9 m telescope show a star (R~17, B~19) at about 2".4 from the nominal X-ray position. We consider association of this star with the X-ray source unlikely and estimate a limiting magnitude of the optical counterpart as B≥22.5 and R≥21.0. Based on the X-ray-to-optical flux ratio, we argue that the X-ray source is likely the compact remnant of the supernova explosion that created the RX J0852.0-4622 SNR. The observed X-ray spectrum of the source is softer than spectra of magnetospheric radiation of rotation-powered pulsars, but it is harder than spectra of cooling neutron stars emitting thermal radiation from the entire surface, similar to the central compact source of the Cas A SNR. We suggest that CXOU J085201.4-461753 belongs to the growing family of radio-quiet compact central sources, presumably neutron stars, recently discovered in a number of SNRs.
ISM: Individual: Alphanumeric: RX J0852.0-4622 - Stars: Neutron - X-Rays: Individual: Alphanumeric: CXOU J085201.4-461753
Figs 1, 2: [PSK2001] AN (Nos A1-A2, M1-M2, S, X, Z).
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