NICER observation list: Target ID 657301

Abstract

XTE J1810-197 is the first discovered radio-loud magnetar. It underwent its second outburst at the end of 2018 when its soft X-ray flux increased by over 2 orders of magnitude driven by the appearance of new hot spots on the surface. Four years later, the source has not yet reached quiescence, showing a flux that is a factor >2 larger. Moreover, the source pulse shape and pulsed fraction has shown an intriguing change over the course of 2021. We propose a yearly monitoring campaign of this historic source to follow-up its late-time spectral and temporal properties as it decays back to quiescence.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
6573010101 272.463 -19.731 10.727 -0.158 59998.7231 59998.9924 3100.0 46 4 VALIDATED 60010.4 60012
6573010102 272.463 -19.731 10.727 -0.158 59999.0450 59999.2509 2116.0 46 2 VALIDATED 60005.2 60013
6573010201 272.463 -19.731 10.727 -0.159 60012.1442 60012.4220 5694.0 51 3 VALIDATED 60022.3 60026
6573010301 272.463 -19.731 10.726 -0.158 60026.1374 60026.6199 7597.0 51 5 VALIDATED 60042.0 60040
6573010401 272.463 -19.732 10.726 -0.159 60040.0278 60040.4352 6114.0 51 4 VALIDATED 60053.9 60054
6573010501 272.462 -19.731 10.727 -0.157 60054.1572 60054.5007 6907.0 51 3 VALIDATED 60063.8 60068
6573010601 272.463 -19.731 10.727 -0.158 60065.8299 60065.9678 1069.0 51 7 VALIDATED 60078.8 60079
6573010602 272.463 -19.730 10.728 -0.158 60066.0232 60066.8056 5688.0 51 7 VALIDATED 60081.3 60080
6573010701 272.464 -19.730 10.728 -0.159 60081.9063 60081.9926 2079.0 51 3 VALIDATED 60094.5 60095
6573010702 272.465 -19.731 10.728 -0.161 60082.0364 60082.2512 4374.0 51 3 VALIDATED 60094.5 60096
6573010801 272.463 -19.732 10.727 -0.159 60096.5456 60096.8269 7967.0 51 4 VALIDATED 60107.7 60110
6573010901 272.463 -19.731 10.727 -0.159 60110.0291 60110.2432 4418.0 51 3 VALIDATED 60121.7 60124
6573011001 272.462 -19.731 10.727 -0.157 60124.8778 60124.9558 1507.2 51 4 VALIDATED 60135.7 60138
6573011002 272.462 -19.730 10.727 -0.157 60125.0130 60125.4000 5385.7 51 4 VALIDATED 60135.7 60139
6573011201 272.467 -19.733 10.728 -0.163 60152.2572 60152.9752 6937.0 51 4 VALIDATED 60164.4 60166
6573011301 272.462 -19.731 10.726 -0.158 60166.6312 60166.8400 3958.0 51 3 VALIDATED 60178.2 60180
6573011302 272.462 -19.731 10.726 -0.158 60167.0249 60167.6030 997.0 51 3 VALIDATED 60178.3 60181
6573011401 272.463 -19.733 10.726 -0.159 60180.1873 60180.6442 6389.0 51 5 VALIDATED 60202.2 60194
6573011601 272.462 -19.731 10.727 -0.157 60208.7708 60208.9685 0.0 42 4 VALIDATED 60219.3 60222
6573011602 272.462 -19.731 10.727 -0.158 60209.0298 60209.0331 0.0 42 3 VALIDATED 60219.3 60223
6573011701 272.464 -19.730 10.728 -0.159 60224.0833 60224.9914 6415.0 51 4 VALIDATED 60235.2 60238
6573011702 272.463 -19.731 10.727 -0.159 60225.0507 60225.0606 305.0 51 4 VALIDATED 60235.3 60239