NICER observation list: Target ID 869101

Abstract

We propose to use NICER monitor the X-ray spectrum of the dust producing colliding wind binary WR 140 (consisting of a C-rich Wolf-Rayet star and an O supergiant) during AO7. These observations will fill in the last remaining phase gap in the NICER X-ray lightcurve of WR 140, and will provide the best measure yet obtained of the X-ray variations of the colliding wind shock over a complete orbit of a key dust-producing dustar binary having precise orbital and stellar parameters.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
8691010101 305.116 43.853 80.929 4.177 60735.0046 60735.1363 1133.0 50 3 VALIDATED 60746.7 60749
8691010201 305.114 43.853 80.928 4.178 60748.6174 60748.8206 1279.0 50 5 VALIDATED 60758.7 60762
8691010401 305.117 43.854 80.930 4.177 60776.1237 60776.3866 427.0 50 8 VALIDATED 60798.9 60790
8691010501 305.117 43.855 80.931 4.177 60789.0289 60789.0426 917.0 50 4 VALIDATED 60799.1 60803
8691010701 305.116 43.854 80.930 4.177 60805.2463 60805.3688 316.0 49 6 VALIDATED 60815.7 60819
8691010801 305.112 43.851 80.925 4.178 60818.9784 60818.9855 546.0 50 4 VALIDATED 60830.9 60832
8691010802 305.111 43.851 80.926 4.178 60819.0420 60819.0503 554.0 50 5 VALIDATED 60830.9 60833
8691010901 305.117 43.852 80.929 4.176 60834.3660 60834.5074 0.0 50 4 VALIDATED 60847.0 60848