[ Previous | Next | ADS ]

Chandra X-ray Observation of G343.3-0.6

ATel #11237; Alexander Seguin (Commonwealth School), Tobit Glenhaber (Commonwealth School), Antonella Fruscione (Smithsonian Astrophysical Observatory), Jeremy Drake (Smithsonian Astrophysical Observatory)
on 26 Jan 2018; 23:40 UT
Credential Certification: Jeremy J. Drake (jdrake@cfa.harvard.edu)

Subjects: X-ray, Cataclysmic Variable, Nova

The Chandra X-ray Observatory's ACIS-S CCD has detected the Cataclysmic Variable G343.3-0.6 at the coordinates 17:01:28.164, -43:06:12.513. Since its source Nova Sco 1437 was first recorded (Shara et al., 2017 Nature, 548,558), G343.3-0.6 has developed into a "deep eclipsing CV" with an orbital period of 4.4 hours (F. Berdinardi et al., 2017, MNRAS 470,4815). Chandra observed G343.3-0.6 for 9.13ks on 2015-06-30, and measured 3295 +/- 58 counts from the point source or 0.360 +/- 0.006 counts/s. We extracted the spectrum of the source in the 0.5-10 keV band and found it well-represented by a combination of a thermal (blackbody) and non-thermal (power law) components, absorbed by the interstellar medium. The best-fit gave a power law index of 0.63 +/- 0.08, an absorbing column nH of (6.5 +/- 0.09)e21 cm^-2 and a kT of 0.059 +/- 0.010 keV. From this model fit, we found a flux of (1.02+/-0.3)e-11 erg/cm^2/s in the 0.5-10 keV band. The X-ray signal was modulated with a period of approximately 1900s which we interpret as the white dwarf spin period, consistent with the findings of F. Berdinardi et al.