Journal article · Preprint article
NICER Observations of the 2018 Outburst of XTE J1810-197
Istanbul University1
NASA Marshall Space Flight Center2
California Institute of Technology3
Sabanci University4
Kyoto University5
NASA Goddard Space Flight Center6
Aoyama Gakuin University7
Columbia University8
IRAP9
Astrophysics and Atmospheric Physics, National Space Institute, Technical University of Denmark10
National Space Institute, Technical University of Denmark11
...and 1 moreWe present the earliest available soft X-ray observations of XTE J1810-197, the prototypical transient magnetar, obtained 75-84 days after its 2018 outburst with the Neutron Star Interior Composition Explorer. Using a series of observations covering eight days we find that its decreasing X-ray flux is well described by either a blackbody plus power law or a two-blackbody spectral model.
The 2-10 keV flux of the source varied from (1.206 +/- 0.007) x 10-10 to (1.125 +/- 0.004) x 10-10 erg s-1 cm-2, a decrease of about 7% within our observations and 44% from that measured 7-14 days after the outburst with NuSTAR. We confirm that the pulsed fraction and spin pulse phase of the neutron star are energy dependent up to at least 8 keV.
Phase-resolved spectroscopy of the pulsar suggests magnetospheric variations relative to the line of sight.
| Language: | English |
|---|---|
| Publisher: | American Astronomical Society |
| Year: | 2019 |
| Pages: | L30 |
| ISSN: | 20418213 and 20418205 |
| Types: | Journal article and Preprint article |
| DOI: | 10.3847/2041-8213/ab212d |
| ORCIDs: | 0000-0002-3531-9842 , 0000-0002-5274-6790 , 0000-0003-1244-3100 , 0000-0003-3847-3957 , 0000-0002-6449-106X , Jaisawal, Gaurava K. and 0000-0002-0380-0041 |
astro-ph.HE stars: magnetars – stars: neutron – X-rays: stars
