X-ray spectroscopy for Swift J1753.5-0127
ATel #552; D. C. Morris, D. N. Burrows, J. Racusin, P. Roming, M. Chester, R. La Verghetta (PSU), C. B. Markwardt (UMD/GSFC), S. D. Barthelmy (GSFC)
on 3 Jul 2005; 20:01 UT
Credential Certification: David Morris (morris@astro.psu.edu)
Subjects: X-ray, Transient
The Swift XRT observed J1753.5-0127 starting on July 1st, 2005 at 21:28 UT. The observation revealed a variable source with a power-law spectrum. The spectrum is best fit by a power-law with absorption slightly greater than the total galactic column density in this direction of 1.7e21:
nH = 2.0e21 ± 3.7e19
PhoIndex = 2.11 ± 1.1e-2
The source is observed to vary on timescales of 10s of seconds between fluxes of 2.9e-9 to 3.7e-9 erg/cm2/s with shorter timescale spikes (seconds) to 4.8e-9erg/cm2/s (all fluxes 0.5-10keV). No significant difference in spectral parameters is noted between the high and low flux states.
