A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1.

Details A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1. A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1.

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..968..248i&link_type=abstract

ASTROPHYSICS OF COMPACT OBJECTS: International Conference on Astrophysics of Compact Objects. AIP Conference Proceedings, Volum

Astronomy and Astrophysics

Astrophysics

X-Ray Binaries, Accretion And Accretion Disks, Neutron Stars, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Black Holes

Scientific paper

We present the preliminary spectral analysis of a 25 ks long Chandra observation of the peculiar source Cir X-1 near the periastron passage. We estimate more precise coordinates of the source compatible with the optical and radio counterpart coordinates. We detect emission lines associated to Mg XII, Si XIII, Si XIV, S XV, S XVI Ar XVII, Ar XVIII, Ca XIX, Ca XX, Fe XXV, Fe XXVI showing a redshift of 470 km s-1. The more intense emission features at 6.6 keV show a double-peaked shape that can be modelled with two or three Gaussian lines.

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