NICER observation list: Target ID 555901

Abstract

We request 30 2ks (total 60 ks) NICER snapshots - distributed any way as long as they are spaced out by more than a day - of the symbiotic LMXB GX 1+4 to (i) explore the NH and iron line variability at different intensity states and thereby understand the physical origin of these states. We will also (ii) measure the equivalent width of iron line with spin phase and probe any anisotropy in matter distribution around the pulsar. Finally, we will (iii) search for possible Compton recoil feature (to Fe kalpha line) in high NH states when the conditions are highly conducive for the formation of a Compton shoulder. Since our goals require frequent visits to the source with an instrument of large area and good spectral resolution, NICER is the only facility to make this possible.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
5559010101 263.010 -24.745 1.938 4.795 59649.9113 59649.9931 2396.0 52 2 VALIDATED 59654.2 59663
5559010201 263.009 -24.746 1.937 4.795 59659.8984 59659.9301 2504.0 52 5 VALIDATED 59671.0 59673
5559010301 263.008 -24.747 1.936 4.795 59669.0660 59669.0938 1722.0 52 5 VALIDATED 59678.9 59683
5559010401 263.009 -24.746 1.937 4.795 59671.3222 59671.3528 1456.0 52 5 VALIDATED 59681.2 59685
5559010501 263.009 -24.747 1.935 4.794 59678.0338 59678.0655 1846.0 52 5 VALIDATED 59687.7 59692
5559010601 263.009 -24.746 1.937 4.795 59683.5986 59683.8039 2383.0 52 7 VALIDATED 59693.7 59697
5559010701 263.009 -24.746 1.937 4.795 59692.7528 59692.8380 3326.0 52 6 VALIDATED 59702.9 59706
5559010801 263.008 -24.745 1.937 4.796 59698.4970 59698.5072 847.0 52 5 VALIDATED 59709.9 59712
5559010901 263.012 -24.742 1.941 4.795 59702.4318 59702.9565 2418.0 52 9 VALIDATED 59715.6 59716
5559011001 263.010 -24.745 1.938 4.795 59720.1306 59720.2079 1870.0 52 4 VALIDATED 59733.0 59734
5559011101 263.009 -24.746 1.937 4.795 59724.7648 59724.8588 1347.0 52 4 VALIDATED 59740.8 59738
5559011102 263.009 -24.746 1.937 4.795 59725.0350 59725.0523 1075.0 52 4 VALIDATED 59740.8 59739
5559011201 263.010 -24.745 1.938 4.795 59733.6044 59733.6324 2286.0 52 4 VALIDATED 59743.9 59747
5559011301 263.009 -24.746 1.937 4.795 59736.2494 59736.2780 1692.0 52 4 VALIDATED 59745.8 59750
5559011401 263.008 -24.746 1.936 4.795 59740.0572 59740.0843 1138.0 52 4 VALIDATED 59752.1 59754
5559011501 263.010 -24.748 1.936 4.793 59748.1236 59748.2046 2189.0 52 5 VALIDATED 59758.1 59762
5559011601 263.009 -24.746 1.937 4.795 59752.2536 59752.2817 1770.0 52 4 VALIDATED 59764.4 59766
5559011701 263.009 -24.746 1.937 4.795 59757.0435 59757.4368 2221.0 52 4 VALIDATED 59782.7 59771
5559011801 263.009 -24.746 1.937 4.795 59763.3505 59763.5088 2559.0 52 4 VALIDATED 59772.8 59777
5559011901 263.008 -24.745 1.937 4.796 59770.5938 59770.7977 2361.0 52 5 VALIDATED 59783.0 59784
5559012001 263.014 -24.746 1.939 4.791 59785.7614 59785.9632 2231.0 52 5 VALIDATED 59800.1 59799
5559012101 263.013 -24.747 1.938 4.791 59789.7584 59789.9000 1982.0 52 3 VALIDATED 59797.5 59803
5559012201 263.012 -24.746 1.938 4.793 59795.1083 59795.1861 2150.0 52 5 VALIDATED 59805.1 59809
5559012301 263.009 -24.746 1.936 4.795 59806.7301 59806.8709 2140.5 52 8 VALIDATED 59820.9 59820
5559012401 263.009 -24.746 1.937 4.795 59811.5564 59811.5856 2185.0 52 5 VALIDATED 59821.1 59825
5559012601 263.010 -24.746 1.937 4.794 59825.0426 59825.3718 1954.1 52 4 VALIDATED 59836.6 59839
5559012701 263.006 -24.745 1.936 4.797 59839.4407 59839.6389 1626.0 52 6 VALIDATED 59848.9 59853
5559012801 263.009 -24.745 1.937 4.795 59856.1644 59856.6238 2173.0 52 7 VALIDATED 59866.8 59870
5559012901 263.009 -24.745 1.937 4.795 59862.2370 59862.3722 1555.0 52 5 VALIDATED 59871.8 59876
5559013001 263.009 -24.746 1.937 4.795 59878.8051 59878.8227 5.0 47 7 VALIDATED 59888.8 59892
5559013002 263.008 -24.747 1.936 4.795 59878.9997 59879.1384 1.0 47 7 VALIDATED 59888.8 59893
5559013101 263.009 -24.746 1.937 4.795 59883.6382 59883.7965 31.0 47 3 VALIDATED 59888.2 59897