Recent Swift Observations of NGC 7793 P13
ATel #16934; Hu, T. S., Ketchum, S. G., Tananko, V., Byun, D., Xiang, X., Miller, J. M. (Univ. of Michigan)
on 6 Dec 2024; 03:02 UT
Credential Certification: Jon Miller (jonmm@umich.edu)
Subjects: X-ray, Binary, Neutron Star, Pulsar
We report on observations of the variable ultra-luminous X-ray source and pulsar NGC 7793 P13 (Israel et al. 2017) on MJD 60638.31 and 60631.75 using the Swift telescope. We generate spectra in the energy range 0.3-10.0keV and use power-law to fit the spectra and obtain the data below.
MJD 60631: power-law index Gamma = 2.7 (-0.3, +0.3), normalization K = 5 (-2, +2) E-3, flux F = 9 (-3, +4) E-12 ergs/cm^2/s.
MJD 60638: power-law index Gamma = 2.6 (-0.3, +0.3), normalization K = 8 (-3, +3) E-3, flux F = 11 (-3, +5) E-12 ergs/cm^2/s.
Both sequences exhibit a steep power-law index, indicating a soft X-ray spectrum. The two indices are consistent within errors, implying that the overall X-ray spectral shape did not change significantly. The fluxes are also consistent with being constant. Further monitoring of NGC 7793 P13 is encouraged.
References
Israel, G., et al., 2017, MNRAS, 466, L48
