NICER observation list: Target ID 763301

Abstract

We propose observing the X-ray variability of the 'standard' colliding wind long-period binary WR 140 near periastron passage with NICER, when the X-ray spectrum varies greatly and dust forms. NICER observations are needed to provide measurement of the variation of the soft spectrum, which could not be done by previous RXTE or Swift observations. The proposed observations will provide key information on variations in X-ray temperature, flux and absorption column for comparison to detailed models, and monitor the appearance of the soft 'relic' component seen in previous Suzaku and XMM-Newton snapshots. This will be the first time that WR 140's periastron passage will be monitored by NICER. We also ask for joint observations with NuSTAR to monitor the non-thermal emission.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
7633010101 305.115 43.853 80.928 4.177 60372.4924 60372.7562 1228.0 50 3 VALIDATED 60388.8 60386
7633010201 305.116 43.854 80.930 4.177 60375.5271 60375.6032 1671.1 50 2 VALIDATED 60389.2 60389
7633010301 305.116 43.854 80.930 4.177 60379.0090 60379.0248 1152.5 50 2 VALIDATED 60391.3 60393
7633010401 305.116 43.854 80.930 4.177 60382.6216 60382.6352 1007.0 50 3 VALIDATED 60393.8 60396
7633010501 305.116 43.854 80.929 4.177 60385.3389 60385.4139 1157.0 50 4 VALIDATED 60397.0 60399
7633011201 305.117 43.854 80.930 4.177 60410.6548 60410.9174 639.2 50 4 VALIDATED 60421.4 60424
7633011202 305.117 43.854 80.930 4.177 60411.1705 60411.4340 401.2 50 5 VALIDATED 60423.2 60425
7633011301 305.117 43.854 80.930 4.177 60414.6536 60414.7336 1078.5 50 3 VALIDATED 60424.8 60428
7633011302 305.118 43.854 80.931 4.176 60779.5464 60779.9405 1900.0 50 4 VALIDATED 60789.7 60793
7633011303 305.117 43.854 80.930 4.177 60780.0656 60780.0697 192.0 50 3 VALIDATED 60789.7 60794
7633011801 305.111 43.856 80.929 4.181 60433.5013 60433.6352 0.0 38 4 VALIDATED 60444.0 60447
7633011901 305.116 43.854 80.930 4.177 60436.1312 60436.9106 2688.0 50 5 VALIDATED 60447.7 60450
7633012001 305.116 43.854 80.930 4.178 60439.4781 60439.5535 1557.5 50 4 VALIDATED 60450.1 60453
7633012101 305.115 43.851 80.927 4.176 60442.8403 60442.9759 1231.2 50 5 VALIDATED 60453.9 60456
7633012201 305.116 43.854 80.930 4.177 60445.1678 60445.3044 993.5 50 4 VALIDATED 60457.1 60459
7633012301 305.116 43.853 80.929 4.176 60450.1837 60450.3858 1287.0 50 4 VALIDATED 60466.9 60464
7633012401 305.116 43.855 80.930 4.177 60452.7620 60452.7819 1635.0 50 3 VALIDATED 60467.7 60466
7633012501 305.117 43.854 80.930 4.177 60457.8558 60457.9271 1062.0 50 2 VALIDATED 60473.7 60471
7633012502 305.113 43.852 80.926 4.178 60458.2425 60458.2484 433.0 50 2 VALIDATED 60474.0 60472
7633012801 305.116 43.854 80.930 4.177 60467.6792 60467.9421 1121.0 52 2 VALIDATED 60483.4 60481
7633012901 305.112 43.855 80.929 4.180 60470.1370 60470.2801 0.0 40 3 VALIDATED 60486.5 60484
7633013001 305.117 43.855 80.931 4.177 60473.3481 60473.4266 1106.5 52 2 VALIDATED 60487.0 60487
7633013101 305.117 43.854 80.930 4.177 60477.1044 60477.1829 361.0 41 2 VALIDATED 60489.3 60491
7633013201 305.117 43.854 80.930 4.177 60480.4500 60480.6440 1308.0 52 3 VALIDATED 60492.1 60494
7633013301 305.117 43.854 80.930 4.177 60483.9940 60484.0227 1430.2 52 3 VALIDATED 60494.5 60498
7633013401 305.117 43.852 80.928 4.176 60487.4238 60487.4421 203.0 41 4 VALIDATED 60498.5 60501
7633013701 305.117 43.855 80.931 4.177 60499.0320 60499.1060 1233.5 41 4 VALIDATED 60509.9 60513
7633013801 305.117 43.855 80.931 4.177 60501.4208 60501.6227 1140.0 41 4 VALIDATED 60512.0 60515
7633013901 305.116 43.854 80.930 4.177 60505.6777 60505.8169 1255.0 41 4 VALIDATED 60517.7 60519
7633014001 305.116 43.854 80.930 4.177 60508.4519 60508.5271 1350.0 41 5 VALIDATED 60527.7 60522
7633014101 305.116 43.854 80.930 4.177 60512.3410 60512.4787 1149.0 52 6 VALIDATED 60531.3 60526
7633014201 305.116 43.854 80.930 4.177 60515.3063 60515.3773 1154.0 52 4 VALIDATED 60531.6 60529
7633014301 305.116 43.854 80.930 4.177 60519.6204 60519.6345 1176.0 52 5 VALIDATED 60542.6 60533
7633014401 305.115 43.849 80.925 4.175 60522.5210 60522.7234 1695.0 52 4 VALIDATED 60539.9 60536
7633014901 305.117 43.855 80.931 4.177 60540.3442 60540.5475 1261.0 52 3 VALIDATED 60552.0 60554
7633015001 305.117 43.855 80.930 4.177 60543.4440 60543.4595 1251.0 52 5 VALIDATED 60555.0 60557
7633015101 305.117 43.855 80.931 4.177 60547.2417 60547.2567 1192.0 52 3 VALIDATED 60559.4 60561
7633015201 305.117 43.854 80.930 4.177 60550.0271 60550.1039 1784.0 52 3 VALIDATED 60561.3 60564
7633015301 305.117 43.854 80.930 4.177 60554.2289 60554.3676 1726.0 50 3 VALIDATED 60565.2 60568
7633015401 305.117 43.854 80.930 4.177 60557.0042 60557.0780 1436.5 50 4 VALIDATED 60567.2 60571
7633015501 305.117 43.855 80.931 4.177 60561.3786 60561.5782 1398.0 41 4 VALIDATED 60571.9 60575
7633015601 305.117 43.854 80.930 4.177 60564.0891 60564.1632 1199.0 41 4 VALIDATED 60574.5 60578
7633015701 305.117 43.855 80.931 4.177 60568.0303 60568.2299 0.0 41 4 VALIDATED 60579.8 60582