NICER observation list: Target ID 663908

Abstract

Modelling of the waveform of the X-ray pulsations of accreting ms pulsars (AMSP) is one of the most promising ways to constrain the equation of state of neutron stars. However, it requires an extremely high number of counts to break the degeneracy between the many parameters that shape the X-ray pulse profiles. The polarimetric information granted by the forthcoming IXPE mission will measure the geometry of the hot spots independently, easing the requirement. We propose a 350 ks NICER ToO observation of the next outburst of an AMSP to measure the pulsar ephemeris and fold simultaneous IXPE data and derive a high statistics energy-resolved pulse profile. The proposed observation will measure the mass and the radius with an accuracy of a few per cent.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
6639080101 221.248 -60.698 316.389 -0.828 60364.2194 60364.9366 5587.0 50 4 VALIDATED 60388.2 60408
6639080102 221.248 -60.698 316.389 -0.828 60365.1868 60365.9083 3819.0 50 3 VALIDATED 60388.4 60409
6639080103 221.248 -60.698 316.389 -0.828 60366.2199 60366.9407 5182.0 50 2 VALIDATED 60385.0 60410
6639080104 221.248 -60.699 316.388 -0.829 60366.9980 60367.1343 545.0 50 2 VALIDATED 60385.1 60411
6639080105 221.249 -60.698 316.389 -0.828 60373.5615 60373.8875 0.0 41 3 VALIDATED 60388.9 60417
6639080106 221.250 -60.699 316.389 -0.829 60374.0115 60374.9850 2.1 41 2 VALIDATED 60389.0 60418
6639080107 221.249 -60.698 316.389 -0.828 60375.0440 60375.8241 1.1 41 2 VALIDATED 60389.1 60419
6639080108 221.249 -60.698 316.389 -0.828 60376.0655 60376.9208 0.0 41 2 VALIDATED 60389.3 60420
6639080109 221.249 -60.698 316.389 -0.828 60377.1011 60377.8884 0.0 41 2 VALIDATED 60389.4 60421
6639080110 221.249 -60.698 316.389 -0.828 60378.0671 60378.8560 0.0 41 3 VALIDATED 60391.2 60422
6639080111 221.250 -60.698 316.389 -0.828 60381.0342 60381.9523 0.0 41 3 VALIDATED 60393.5 60425
6639080112 221.250 -60.698 316.390 -0.828 60382.0678 60382.9843 0.0 41 3 VALIDATED 60393.7 60426
6639080113 221.248 -60.698 316.389 -0.828 60383.1048 60383.8875 765.0 41 3 VALIDATED 60394.0 60427
6639080114 221.249 -60.698 316.389 -0.828 60390.1975 60390.9861 4094.0 41 5 VALIDATED 60402.8 60434
6639080115 221.252 -60.698 316.390 -0.829 60391.1037 60391.9373 5407.0 50 6 VALIDATED 60404.0 60435
6639080116 221.251 -60.697 316.390 -0.828 60392.0524 60392.9711 5180.0 50 4 VALIDATED 60404.2 60436
6639080117 221.251 -60.699 316.390 -0.829 60394.1370 60394.9166 1341.0 41 7 VALIDATED 60414.1 60438
6639080118 221.259 -60.693 316.396 -0.825 60396.2063 60396.2755 63.0 41 7 VALIDATED 60414.1 60440
6639080119 221.249 -60.697 316.390 -0.828 60397.2313 60397.6269 1522.7 41 5 VALIDATED 60410.0 60441
6639080120 221.249 -60.698 316.389 -0.828 60398.0719 60398.5081 412.2 41 4 VALIDATED 60410.1 60442
6639080121 221.251 -60.696 316.391 -0.827 60409.8691 60409.8727 133.0 50 4 VALIDATED 60421.2 60453
6639080122 221.248 -60.696 316.389 -0.826 60409.9987 60410.7048 440.0 50 4 VALIDATED 60421.3 60454
6639080123 221.248 -60.696 316.390 -0.826 60411.4761 60411.4822 451.0 50 5 VALIDATED 60423.2 60455
6639080124 221.248 -60.697 316.389 -0.827 60412.4440 60412.4516 578.0 50 4 VALIDATED 60423.3 60456
6639080125 221.249 -60.696 316.390 -0.826 60415.2172 60415.2903 741.0 50 4 VALIDATED 60424.9 60459
6639080126 221.248 -60.698 316.389 -0.828 60416.7651 60416.7694 139.0 50 4 VALIDATED 60430.3 60460
6639080127 221.247 -60.697 316.389 -0.827 60418.1856 60418.7042 1296.0 50 4 VALIDATED 60432.3 60462
6639080128 221.245 -60.696 316.389 -0.825 60419.1510 60419.1616 836.0 50 4 VALIDATED 60432.5 60463
6639080129 221.246 -60.696 316.389 -0.826 60420.5711 60420.8311 534.0 41 4 VALIDATED 60432.7 60464
6639080130 221.247 -60.695 316.390 -0.825 60421.1495 60421.9273 2269.0 41 3 VALIDATED 60432.8 60465
6639080131 221.247 -60.695 316.390 -0.825 60422.5678 60422.9583 937.0 41 4 VALIDATED 60437.3 60466
6639080132 221.246 -60.694 316.390 -0.824 60423.0192 60423.9907 3946.0 41 3 VALIDATED 60437.4 60467
6639080133 221.246 -60.696 316.389 -0.826 60424.4373 60424.7734 2180.0 41 3 VALIDATED 60437.5 60468
6639080134 221.247 -60.696 316.389 -0.826 60425.0193 60425.8610 1847.0 41 2 VALIDATED 60437.6 60469
6639080135 221.247 -60.698 316.388 -0.828 60426.8315 60426.8963 442.0 50 2 VALIDATED 60437.8 60470
6639080136 221.247 -60.698 316.388 -0.828 60427.5995 60427.6113 747.0 50 3 VALIDATED 60439.8 60471
6639080137 221.249 -60.694 316.391 -0.824 60428.9547 60428.9652 0.0 50 3 VALIDATED 60440.0 60472
6639080138 221.247 -60.698 316.388 -0.828 60429.7943 60429.8039 306.0 50 3 VALIDATED 60440.1 60473
6639080139 221.247 -60.698 316.388 -0.828 60430.8263 60430.8377 374.0 50 3 VALIDATED 60441.9 60474
6639080140 221.247 -60.698 316.388 -0.828 60431.6648 60431.6759 826.0 50 3 VALIDATED 60442.1 60475
6639080141 221.248 -60.698 316.389 -0.828 60433.8600 60433.8678 446.0 50 4 VALIDATED 60444.0 60477