NICER observation list: Target ID 557401

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
5574010101 272.115 -36.979 355.385 -8.148 59814.9215 59814.9421 616.0 52 5 VALIDATED 59824.9 59858
5574010102 272.115 -36.979 355.385 -8.148 59815.1150 59815.8426 5966.0 52 5 VALIDATED 59824.9 59859
5574010103 272.115 -36.979 355.385 -8.148 59816.0824 59816.9419 13011.0 52 4 VALIDATED 59829.3 59860
5574010104 272.115 -36.979 355.385 -8.148 59817.0637 59817.9743 8746.3 52 6 VALIDATED 59835.1 59861
5574010105 272.115 -36.979 355.385 -8.148 59818.0319 59818.9888 9753.0 52 4 VALIDATED 59830.7 59862
5574010106 272.115 -36.979 355.385 -8.148 59819.0427 59819.9743 9233.0 52 4 VALIDATED 59830.7 59863
5574010107 272.115 -36.979 355.385 -8.148 59820.0215 59820.9421 6426.0 52 4 VALIDATED 59830.8 59864
5574010108 272.115 -36.979 355.385 -8.148 59821.0423 59821.9745 6828.0 52 3 VALIDATED 59830.9 59865
5574010109 272.115 -36.979 355.385 -8.148 59822.0141 59822.9896 9703.0 52 2 VALIDATED 59829.8 59866
5574010110 272.115 -36.979 355.385 -8.148 59822.9961 59823.9704 10068.0 52 5 VALIDATED 59838.7 59867
5574010111 272.115 -36.979 355.385 -8.148 59824.0269 59824.9998 6478.0 52 5 VALIDATED 59836.5 59868
5574010112 272.115 -36.979 355.385 -8.149 59825.0484 59825.9563 2892.0 52 4 VALIDATED 59836.6 59869
5574010113 272.115 -36.979 355.385 -8.149 59826.0177 59826.4076 1017.0 52 3 VALIDATED 59836.7 59870
5574010114 272.115 -36.979 355.385 -8.148 59833.9437 59833.9516 549.0 52 6 VALIDATED 59844.2 59877
5574010115 272.112 -36.977 355.386 -8.146 59834.2662 59834.6634 252.0 52 6 VALIDATED 59846.1 59878
5574010116 272.112 -36.977 355.385 -8.145 59835.2338 59835.8921 1434.0 52 5 VALIDATED 59846.1 59879
5574010117 272.112 -36.977 355.386 -8.145 59836.6526 59836.6676 117.0 52 5 VALIDATED 59847.0 59880
5574010118 272.111 -36.977 355.385 -8.144 59837.6843 59837.8944 1615.0 52 7 VALIDATED 59849.8 59881
5574010119 272.113 -36.979 355.384 -8.147 59838.3932 59838.7984 368.0 52 6 VALIDATED 59848.8 59882
5574010120 272.111 -36.977 355.386 -8.145 59839.0535 59839.6345 575.0 52 6 VALIDATED 59848.9 59883
5574010121 272.111 -36.977 355.385 -8.145 59840.0710 59840.0755 59.0 52 6 VALIDATED 59849.9 59884
5574010122 272.113 -36.979 355.384 -8.147 59841.8280 59841.8956 1637.0 52 6 VALIDATED 59852.8 59885
5574010123 272.110 -36.976 355.386 -8.144 59842.4579 59842.9273 2440.0 52 5 VALIDATED 59852.8 59886
5574010124 272.115 -36.979 355.385 -8.148 59843.0391 59843.8373 2113.0 52 6 VALIDATED 59855.0 59887
5574010125 272.114 -36.979 355.385 -8.148 59844.1421 59844.1521 757.0 52 5 VALIDATED 59855.1 59888
5574010126 272.114 -36.979 355.385 -8.148 59845.0367 59845.6345 2017.0 52 5 VALIDATED 59855.1 59889
5574010127 272.114 -36.975 355.388 -8.146 59846.1986 59846.4720 1093.0 52 4 VALIDATED 59855.2 59890
5574010128 272.118 -36.981 355.384 -8.151 59856.7423 59856.7468 222.0 52 7 VALIDATED 59866.8 59900
5574010129 272.116 -36.982 355.383 -8.151 59857.5185 59857.7220 1425.0 52 6 VALIDATED 59869.8 59901
5574010130 272.119 -36.982 355.384 -8.153 59858.0310 59858.9491 1345.0 52 5 VALIDATED 59869.8 59902
5574010131 272.118 -36.981 355.384 -8.151 59858.9986 59859.8417 1239.0 52 10 VALIDATED 59879.7 59903
5574010132 272.115 -36.979 355.385 -8.148 59860.8148 59860.8215 297.0 52 5 VALIDATED 59875.7 59904
5574010133 272.118 -36.980 355.385 -8.151 59861.4485 59861.9065 1259.2 52 5 VALIDATED 59871.7 59905
5574010134 272.118 -36.979 355.386 -8.151 59862.2255 59862.9364 2238.0 52 9 VALIDATED 59875.8 59906
5574010135 272.118 -36.980 355.385 -8.151 59862.9975 59863.0010 186.0 52 7 VALIDATED 59874.8 59907
5574010136 272.115 -36.979 355.385 -8.149 59864.6144 59864.8278 463.0 52 6 VALIDATED 59874.9 59908
5574010137 272.116 -36.979 355.386 -8.149 59865.1338 59865.8623 322.0 52 6 VALIDATED 59875.8 59909
5574010138 272.116 -36.979 355.386 -8.149 59871.1222 59871.5164 655.0 52 7 VALIDATED 59881.7 59915
5574010139 272.116 -36.979 355.385 -8.149 59872.2252 59872.8753 0.0 52 7 VALIDATED 59882.7 59916
5574010140 272.115 -36.979 355.385 -8.149 59873.6477 59873.7794 144.0 49 7 VALIDATED 59883.8 59917
5574010141 272.115 -36.979 355.385 -8.148 59874.8634 59874.8764 661.0 49 7 VALIDATED 59884.8 59918
5574010142 272.115 -36.979 355.385 -8.149 59875.9192 59875.9226 0.0 49 7 VALIDATED 59885.8 59919
5574010143 272.115 -36.979 355.384 -8.148 59876.2894 59876.8123 126.0 49 7 VALIDATED 59886.8 59920
5574010144 272.115 -36.979 355.385 -8.148 59877.2021 59877.9831 1413.0 49 7 VALIDATED 59887.8 59921
5574010145 272.115 -36.979 355.385 -8.148 59878.1056 59878.9572 2766.0 49 7 VALIDATED 59888.8 59922
5574010146 272.114 -36.980 355.384 -8.148 59883.0711 59883.0782 186.0 49 3 VALIDATED 59888.1 59927