NICER observation list: Target ID 763302

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
7633020101 305.121 43.857 80.934 4.176 60570.6139 60570.7475 0.0 41 4 VALIDATED 60582.3 60584
7633020102 305.117 43.855 80.931 4.177 60571.4490 60571.4551 0.0 41 4 VALIDATED 60582.5 60585
7633020201 305.116 43.854 80.929 4.177 60576.6145 60576.8120 0.0 41 4 VALIDATED 60587.1 60590
7633020301 305.116 43.853 80.929 4.176 60578.6129 60578.8796 0.0 41 3 VALIDATED 60589.1 60592
7633020401 305.116 43.854 80.930 4.177 60581.5158 60581.5231 0.0 41 5 VALIDATED 60593.8 60595
7633020402 305.116 43.855 80.930 4.177 60582.6885 60582.7035 1208.0 50 5 VALIDATED 60595.2 60596
7633020501 305.117 43.854 80.930 4.177 60585.3220 60585.3993 0.0 41 4 VALIDATED 60595.6 60599
7633020601 305.116 43.854 80.930 4.177 60588.1743 60588.9583 1773.0 50 5 VALIDATED 60599.7 60602
7633020701 305.116 43.855 80.930 4.178 60592.2903 60592.3104 0.0 41 3 VALIDATED 60602.2 60606
7633020801 305.116 43.855 80.930 4.178 60596.6782 60596.7609 0.0 41 3 VALIDATED 60607.1 60610
7633020901 305.116 43.854 80.930 4.177 60598.4215 60598.4363 0.0 41 5 VALIDATED 60612.9 60612
7633020902 305.116 43.854 80.930 4.177 60599.4548 60599.4667 0.0 41 5 VALIDATED 60613.0 60613
7633021201 305.117 43.855 80.931 4.177 60612.7037 60612.7174 1087.0 50 5 VALIDATED 60625.6 60626
7633021301 305.116 43.858 80.933 4.179 60613.8139 60613.9463 706.0 50 5 VALIDATED 60625.8 60627
7633021302 305.117 43.857 80.932 4.178 60614.0035 60614.0752 698.0 50 4 VALIDATED 60625.8 60628
7633021401 305.117 43.854 80.930 4.177 60617.7421 60617.8139 1147.0 50 4 VALIDATED 60628.0 60631
7633021501 305.117 43.854 80.930 4.177 60620.2567 60620.4585 1848.0 50 4 VALIDATED 60632.0 60634
7633021601 305.117 43.854 80.930 4.177 60624.4481 60624.5836 1309.0 50 5 VALIDATED 60635.3 60638
7633021701 305.117 43.854 80.930 4.177 60627.8451 60627.8738 1107.0 50 4 VALIDATED 60638.5 60641
7633021801 305.117 43.854 80.930 4.177 60631.3301 60631.4863 1436.0 50 4 VALIDATED 60641.7 60645
7633022001 305.116 43.855 80.930 4.177 60637.0926 60637.6184 2706.0 50 4 VALIDATED 60647.8 60651
7633022002 305.117 43.855 80.931 4.177 60638.0552 60638.0685 1015.0 49 4 VALIDATED 60647.9 60652
7633022401 305.117 43.854 80.930 4.177 60652.0375 60652.1123 0.0 36 5 VALIDATED 60662.0 60666
7633022501 305.116 43.854 80.930 4.177 60655.5844 60655.6062 0.0 36 5 VALIDATED 60671.2 60669
7633022601 305.116 43.854 80.930 4.177 60659.1967 60659.2197 0.0 34 3 VALIDATED 60671.6 60673
7633022701 305.116 43.854 80.930 4.177 60662.4125 60662.8042 1134.0 50 2 VALIDATED 60674.0 60676
7633022801 305.114 43.852 80.927 4.177 60666.2174 60666.4812 1026.0 50 4 VALIDATED 60677.8 60680
7633022901 305.116 43.854 80.930 4.178 60669.5708 60669.7063 1306.0 50 3 VALIDATED 60680.0 60683
7633023601 305.115 43.857 80.932 4.180 60692.6479 60692.9741 1513.0 50 4 VALIDATED 60702.9 60706
7633023602 305.115 43.857 80.932 4.180 60693.0352 60693.5531 1508.0 50 4 VALIDATED 60704.8 60707
7633023701 305.117 43.855 80.930 4.177 60697.2276 60697.4891 1050.5 50 5 VALIDATED 60710.2 60711
7633023801 305.117 43.856 80.931 4.178 60701.2249 60701.4880 948.0 44 7 VALIDATED 60724.7 60715
7633024301 305.117 43.855 80.930 4.177 60718.4201 60718.6183 1017.0 50 9 VALIDATED 60746.0 60732
7633024401 305.116 43.854 80.930 4.177 60722.4212 60722.5563 1239.0 50 5 VALIDATED 60732.8 60736
7633024501 305.117 43.854 80.930 4.177 60725.2577 60725.2660 568.0 50 6 VALIDATED 60746.2 60739
7633024601 305.116 43.854 80.929 4.177 60729.0009 60729.2657 1148.0 50 6 VALIDATED 60742.4 60743
7633024701 305.116 43.854 80.930 4.177 60732.4201 60732.4942 1251.0 50 5 VALIDATED 60746.5 60746