NICER observation list: Target ID 465801

Abstract

SWIFT J1749.4 2807 is the 13th discovered of over 20 AMXPs, and is the only AMXP to be found in an eclipsing system. Using the mass function of the system and the eclipse half-angle, it is possible to constrain the inclination of the system within the 74.4-77.3 deg range. This is the tightest constraint on the orbital inclination of any AMXP to date. SWIFT J1749.4 2807 also shows uncommonly strong harmonic content that, together with the inclination, suggests that it might be the best source to set constraints on neutron star properties including compactness and geometry. To explore this, we propose to observe the next outburst of SWIFT J1749.4 2807 with 120 ksec of NICER observations. We will perform combined timing and spectral study of this source using the unique capabilities of NICER
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
4658010101 267.384 -28.135 1.131 -0.322 59274.6157 59274.9630 9272.0 52 3 VALIDATED 59278.7 59288
4658010102 267.385 -28.136 1.131 -0.323 59275.0020 59275.9852 18150.0 52 3 VALIDATED 59281.9 59289
4658010103 267.384 -28.136 1.130 -0.321 59276.0367 59276.9530 9783.0 52 2 VALIDATED 59282.0 59290
4658010104 267.385 -28.136 1.130 -0.323 59277.0101 59277.9970 11637.0 52 3 VALIDATED 59283.6 59291
4658010105 267.384 -28.136 1.130 -0.322 59278.0425 59278.9648 16957.0 52 2 VALIDATED 59282.7 59292
4658010106 267.386 -28.135 1.131 -0.323 59281.2010 59281.9910 5263.0 52 2 VALIDATED 59285.6 59295
4658010107 267.386 -28.135 1.131 -0.323 59282.0402 59282.9589 11283.0 52 4 VALIDATED 59293.7 59296
4658010108 267.387 -28.135 1.132 -0.324 59283.0087 59283.9293 12035.0 52 3 VALIDATED 59293.7 59297
4658010109 267.386 -28.135 1.132 -0.323 59284.1085 59284.9512 8594.0 52 3 VALIDATED 59293.8 59298
4658010110 267.383 -28.135 1.130 -0.320 59285.0107 59285.9923 7365.0 52 3 VALIDATED 59293.8 59299
4658010111 267.385 -28.136 1.130 -0.323 59286.1742 59286.9567 4522.0 52 2 VALIDATED 59293.9 59300
4658010112 267.384 -28.134 1.131 -0.321 59287.0144 59287.9405 6460.0 52 3 VALIDATED 59294.0 59301
4658010113 267.384 -28.135 1.131 -0.321 59288.1204 59288.9648 2467.0 52 4 VALIDATED 59294.0 59302
4658010114 267.383 -28.135 1.130 -0.321 59293.1565 59293.1692 691.0 52 3 VALIDATED 59297.6 59307
4658010115 267.383 -28.135 1.130 -0.320 59294.0486 59294.9757 5948.0 52 3 VALIDATED 59298.6 59308
4658010116 267.383 -28.135 1.130 -0.321 59295.3350 59295.8683 1480.0 52 3 VALIDATED 59299.6 59309
4658010117 267.383 -28.135 1.130 -0.321 59296.2391 59296.7077 984.0 52 3 VALIDATED 59300.6 59310
4658010118 267.383 -28.136 1.130 -0.321 59297.2079 59297.7528 2745.0 52 3 VALIDATED 59301.7 59311
4658010119 267.383 -28.135 1.130 -0.321 59298.2451 59298.7728 2160.0 52 3 VALIDATED 59302.7 59312
4658010120 267.384 -28.137 1.129 -0.322 59299.2778 59299.3597 228.0 52 3 VALIDATED 59303.7 59313
4658010121 267.383 -28.136 1.129 -0.321 59300.1859 59300.7785 1322.0 52 6 VALIDATED 59322.7 59314
4658010122 267.382 -28.136 1.129 -0.320 59301.2845 59301.8201 1635.0 52 6 VALIDATED 59321.8 59315
4658010123 267.382 -28.136 1.129 -0.320 59302.3187 59302.8532 2216.0 52 5 VALIDATED 59319.8 59316
4658010124 267.384 -28.135 1.130 -0.321 59304.6943 59304.7801 1397.0 52 5 VALIDATED 59314.8 59318
4658010125 267.384 -28.136 1.130 -0.321 59305.1546 59305.1676 556.0 52 5 VALIDATED 59314.8 59319
4658010126 267.383 -28.136 1.129 -0.321 59309.8727 59309.8917 1478.0 52 5 VALIDATED 59319.9 59323
4658010127 267.383 -28.137 1.129 -0.321 59312.5273 59312.6037 1084.0 52 7 VALIDATED 59322.9 59326
4658010128 267.383 -28.135 1.130 -0.321 59313.0435 59313.0558 974.0 52 5 VALIDATED 59322.9 59327
4658010129 267.383 -28.135 1.130 -0.321 59315.5530 59315.8319 3389.0 52 7 VALIDATED 59330.1 59329
4658010130 267.383 -28.135 1.130 -0.321 59318.7243 59318.7970 1243.0 52 7 VALIDATED 59330.8 59332
4658010131 267.383 -28.132 1.133 -0.319 59325.0396 59325.1111 0.0 52 7 VALIDATED 59336.8 59339
4658010132 267.382 -28.135 1.130 -0.320 59330.2778 59330.2912 1037.0 52 4 VALIDATED 59340.0 59344
4658010133 267.383 -28.135 1.130 -0.320 59335.5690 59335.7063 1912.0 52 6 VALIDATED 59345.7 59349