X-ray detection of 2MASS J06593158-0405277
ATel #7025; D. Pooley (Eureka Scientific & Sam Houston State Univ.), J. D. Green (STScI), S. Skinner (Univ. of Colorado), and M. Guedel (Univ. of Vienna)
on 4 Feb 2015; 13:47 UT
Credential Certification: dave pooley (pooley@alum.mit.edu)
Subjects: X-ray, Young Stellar Object, Pre-Main-Sequence Star
We report the results of a Chandra Target-of-Opportunity observation starting on 2015-Jan-26.3 of the FU Orionis candidate 2MASS J06593158-0405277 (ATel #6770, #6797, #6838, #6862, #6901). This is the earliest X-ray observation to date of an FU Ori-type object after outburst.
We detect 232.1 net counts in the 0.5-8 keV band from 2MASS J06593158-0405277 in 49.4 ksec of exposure. We performed a preliminary spectral analysis using an absorbed thermal bremsstrahlung model. We find a best-fit temperature of kT = 3.2 keV, a column density of n_H = 3.4e21 cm^-2, and an absorbed 0.5-8 keV flux of 4.3e-14 erg/cm^2/s. The unabsorbed 0.5-8 keV flux is 6.0e-14 erg/cm^2/s. Assuming isotropic emission, the unabsorbed luminosity of 2MASS J06593158-0405277 is Lx = 7.2e30 (d/kpc)^2 erg/s.
In addition, we also detect 32.1 net counts in the 0.5-8 keV band from 2MASS J06593168-0405224 (ATel #6862), which lies 5.5 arcseconds to the northeast of 2MASS J06593158-0405277. This source also appears to be moderately absorbed, with no counts detected below 1 keV.
"True color" Chandra image: http://www.pas.rochester.edu/~joel/chandra-atel/2massj06593-truecolor.png
We thank the CXC Direcor Belinda Wilkes and the Chandra team for carrying out these observations.
