NICER observation list: Target ID 863801

Abstract

1ES 1927+654 defies what we thought possible for accretion onto black holes. In 2018, the source began a major outburst, becoming the first changing-look AGN caught in real time. 1ES 1927+654 exhibited extreme X-ray spectral variability during the outburst, including the destruction of the X-ray corona. Despite rebuilding its corona and returning to its pre-outburst X-ray state by 2021, this unique AGN began showing a rapidly-evolving mHz X-ray QPO and recently launched a radio jet. We propose a one year monitoring campaign with two 1 ks NICER observations per week (totaling 104 ks) to track the long-term evolution of the new mHz QPO, connect the QPO to the evolution of the X-ray corona, and search for sudden outbursts as the QPO evolves to the ISCO in this NICER legacy target.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
8638010101 291.830 65.565 96.984 20.961 60735.1254 60735.1972 907.0 50 3 VALIDATED 60746.7 60749
8638010201 291.829 65.564 96.983 20.961 60738.5502 60738.8137 1099.0 50 3 VALIDATED 60751.1 60752
8638010301 291.831 65.565 96.984 20.961 60741.5095 60741.6463 877.0 50 3 VALIDATED 60752.8 60755
8638010401 291.829 65.563 96.982 20.961 60744.6250 60744.8068 591.0 50 5 VALIDATED 60754.6 60758
8638010501 291.830 65.561 96.980 20.960 60747.9153 60747.9220 266.0 50 6 VALIDATED 60758.6 60761
8638010601 291.820 65.564 96.981 20.965 60749.9655 60749.9847 1555.0 50 5 VALIDATED 60759.7 60763
8638010701 291.820 65.566 96.983 20.966 60753.2567 60753.2718 1181.0 50 6 VALIDATED 60762.7 60767
8638011101 291.832 65.566 96.985 20.961 60765.0412 60765.1179 0.0 49 4 VALIDATED 60775.0 60779
8638011201 291.832 65.565 96.984 20.960 60768.1345 60768.1542 0.0 48 4 VALIDATED 60779.8 60782
8638011301 291.832 65.565 96.984 20.961 60771.7454 60771.7671 0.0 46 5 VALIDATED 60782.1 60785
8638011401 291.832 65.565 96.984 20.960 60773.4889 60773.5093 0.0 47 5 VALIDATED 60787.2 60787
8638011402 291.832 65.565 96.984 20.961 60774.0704 60774.0898 0.0 47 4 VALIDATED 60787.3 60788
8638011501 291.831 65.564 96.983 20.961 60777.8720 60777.8944 0.0 47 5 VALIDATED 60788.3 60791
8638011601 291.834 65.564 96.983 20.959 60780.1900 60780.2634 854.0 50 3 VALIDATED 60789.8 60794
8638011701 291.832 65.565 96.984 20.961 60782.2655 60782.4125 0.0 48 6 VALIDATED 60794.0 60796
8638011702 291.832 65.565 96.984 20.961 60783.3704 60783.7671 1463.0 49 4 VALIDATED 60794.1 60797
8638011703 291.832 65.565 96.984 20.961 60784.0801 60784.0896 0.0 49 3 VALIDATED 60794.2 60798
8638011801 291.831 65.565 96.984 20.961 60786.3831 60786.7083 1592.0 50 6 VALIDATED 60797.2 60800
8638011901 291.833 65.564 96.983 20.960 60790.5761 60790.5896 1045.0 50 4 VALIDATED 60800.9 60804
8638012001 291.833 65.565 96.984 20.960 60792.9620 60792.9773 1081.0 50 4 VALIDATED 60803.0 60806
8638012002 291.832 65.564 96.983 20.960 60793.0361 60793.0410 247.0 50 4 VALIDATED 60803.0 60807
8638012101 291.831 65.565 96.984 20.961 60795.4852 60795.5583 1120.0 50 6 VALIDATED 60806.8 60809
8638012201 291.832 65.564 96.983 20.960 60798.1921 60798.2653 1169.0 50 4 VALIDATED 60808.8 60812
8638012301 291.829 65.564 96.983 20.961 60801.3520 60801.3657 1078.0 50 7 VALIDATED 60811.8 60815
8638012501 291.830 65.565 96.984 20.961 60807.6220 60807.6382 518.0 50 7 VALIDATED 60817.8 60821
8638012601 291.830 65.565 96.984 20.961 60810.5262 60810.5414 1239.0 50 7 VALIDATED 60821.7 60824
8638012701 291.831 65.565 96.984 20.961 60812.0104 60812.0252 1178.0 50 5 VALIDATED 60821.8 60826
8638012801 291.827 65.561 96.979 20.961 60816.6553 60816.8550 415.0 50 7 VALIDATED 60830.7 60830
8638012901 291.827 65.562 96.980 20.962 60819.2396 60819.4991 1498.0 50 5 VALIDATED 60830.9 60833
8638013201 291.833 65.565 96.985 20.960 60828.3824 60828.5840 0.0 50 4 VALIDATED 60839.3 60842
8638013301 291.833 65.565 96.984 20.960 60831.0867 60831.2910 0.0 50 4 VALIDATED 60841.1 60845
8638013401 291.833 65.565 96.984 20.960 60834.2421 60834.3856 0.0 50 4 VALIDATED 60847.0 60848
8638013501 291.832 65.565 96.984 20.961 60837.1323 60837.2664 564.0 50 6 VALIDATED 60856.9 60851
8638013601 291.833 65.565 96.984 20.960 60840.2241 60840.3641 385.0 50 7 VALIDATED 60864.4 60854