NICER observation list: Target ID 359201

Abstract

Swift J1858.6-0814 is a very unusual X-ray binary. It shows extreme rapid variability, by factors >200, and has a very hard X-ray spectrum with strong structure around the iron line. Strong signatures of winds have been observed in wavebands from IR to soft X-rays. Such an accretion state has only previously been seen in short outbursts of V404 Cyg and V4641 Sgr. Swift J1858.6-0814 is currently undergoing a prolonged outburst giving an unprecedented opportunity to study this unusual mode of accretion: we propose to continue the existing NICER monitoring to find out more about this mode and detect any transitions to other accretion states.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
3592010101 284.646 -8.237 26.390 -5.324 58909.3104 58909.3965 0.0 50 3 VALIDATED 58913.7 58923
3592010102 284.651 -8.237 26.392 -5.328 58938.6227 58938.6333 719.0 52 3 VALIDATED 58942.6 58952
3592010201 284.648 -8.237 26.391 -5.326 58912.1415 58912.1731 251.0 50 3 VALIDATED 58917.7 58926
3592010301 284.646 -8.237 26.390 -5.324 58915.0465 58915.1296 483.0 52 3 VALIDATED 58919.8 58929
3592010401 284.646 -8.238 26.389 -5.324 58918.2089 58918.3530 933.0 52 5 VALIDATED 58981.9 58932
3592010402 284.646 -8.238 26.389 -5.324 58919.0480 58919.2523 852.9 52 6 VALIDATED 58992.4 58933
3592010501 284.646 -8.237 26.389 -5.324 58920.9842 58920.9988 545.0 52 3 VALIDATED 58924.8 58934
3592010502 284.646 -8.237 26.390 -5.324 58921.0488 58921.3139 1929.0 52 3 VALIDATED 58925.6 58935
3592010601 284.647 -8.237 26.390 -5.325 58923.1791 58923.3229 2368.0 52 3 VALIDATED 58927.6 58937
3592010602 284.646 -8.237 26.390 -5.324 58924.0826 58924.3569 2683.0 52 3 VALIDATED 58928.7 58938
3592010701 284.646 -8.240 26.387 -5.326 58927.4484 58927.5197 601.0 52 2 VALIDATED 58931.6 58941
3592010801 284.646 -8.238 26.389 -5.324 58929.9575 58929.9839 2017.0 52 3 VALIDATED 58933.6 58943
3592010901 284.645 -8.238 26.389 -5.324 58933.5225 58933.5903 2190.0 52 3 VALIDATED 58937.6 58947
3592011001 284.643 -8.238 26.388 -5.322 58936.2949 58936.3766 1506.0 52 3 VALIDATED 58940.6 58950
3592011101 284.645 -8.238 26.389 -5.324 58938.6859 58938.7625 2485.0 52 3 VALIDATED 58942.6 58952
3592011201 284.646 -8.238 26.389 -5.324 58941.9709 58941.9889 987.0 52 4 VALIDATED 58947.9 58955
3592011202 284.646 -8.238 26.389 -5.324 58942.0354 58942.0532 811.0 52 4 VALIDATED 58947.9 58956
3592011301 284.646 -8.238 26.389 -5.324 58945.4759 58945.5513 1692.0 52 2 VALIDATED 58949.9 58959
3592011401 284.646 -8.237 26.390 -5.324 58948.1061 58948.1356 1951.0 52 3 VALIDATED 58952.6 58962
3592011501 284.646 -8.239 26.388 -5.325 58951.0765 58951.1081 2087.0 52 3 VALIDATED 58955.6 58965
3592011601 284.646 -8.237 26.390 -5.324 58954.1120 58954.2560 641.0 52 3 VALIDATED 58961.0 58968
3592011701 284.645 -8.237 26.389 -5.324 58957.0167 58957.1600 913.0 52 2 VALIDATED 58961.6 58971
3592011801 284.645 -8.236 26.390 -5.323 58960.8260 58960.9049 2378.0 52 3 VALIDATED 58964.6 58974
3592011901 284.645 -8.235 26.391 -5.322 58963.4090 58963.6875 3261.0 52 3 VALIDATED 58967.7 58977
3592012001 284.645 -8.237 26.390 -5.323 58968.1887 58968.2697 2334.0 52 3 VALIDATED 58973.7 58982
3592012101 284.646 -8.234 26.393 -5.323 58969.7355 58969.8169 2577.0 52 2 VALIDATED 58973.8 58983
3592012201 284.646 -8.234 26.393 -5.323 58971.9932 58972.1984 2538.0 52 4 VALIDATED 58981.0 58986
3592012701 284.649 -8.237 26.391 -5.326 58987.0434 58987.1271 1884.0 52 3 VALIDATED 58993.8 59001
3592012801 284.647 -8.237 26.391 -5.325 58990.0131 58990.1618 3855.0 52 5 VALIDATED 59001.6 59004
3592012901 284.646 -8.238 26.389 -5.324 58994.3988 58994.5419 2900.0 52 3 VALIDATED 58998.9 59008
3592013001 284.646 -8.238 26.389 -5.324 58996.0135 58996.1558 3102.0 52 3 VALIDATED 59000.7 59010
3592013101 284.645 -8.238 26.389 -5.324 58998.5952 58998.6011 432.0 52 3 VALIDATED 59002.7 59012
3592013102 284.645 -8.238 26.389 -5.324 58999.4342 58999.4634 2297.0 52 4 VALIDATED 59004.7 59013
3592013201 284.645 -8.238 26.389 -5.323 59002.6067 59002.8836 2574.0 52 5 VALIDATED 59011.9 59016
3592013301 284.645 -8.238 26.389 -5.323 59005.3130 59005.3359 1395.0 52 4 VALIDATED 59012.8 59019
3592013401 284.645 -8.238 26.389 -5.324 59008.6640 59008.7433 2359.0 52 6 VALIDATED 59026.8 59022
3592013501 284.646 -8.238 26.389 -5.324 59011.3111 59011.3854 2363.0 52 4 VALIDATED 59016.7 59025
3592013601 284.647 -8.239 26.389 -5.326 59014.3458 59014.4396 2119.0 52 3 VALIDATED 59018.8 59028
3592013701 284.646 -8.238 26.389 -5.324 59017.8322 59017.8618 1902.0 52 4 VALIDATED 59022.7 59031
3592013801 284.646 -8.238 26.389 -5.324 59020.5436 59020.5738 2096.0 52 3 VALIDATED 59024.9 59034
3592013901 284.647 -8.238 26.389 -5.325 59023.1258 59023.1565 1783.0 52 3 VALIDATED 59027.6 59037
3592014001 284.646 -8.238 26.389 -5.324 59026.0944 59026.1252 1782.0 52 3 VALIDATED 59030.7 59040
3592014101 284.646 -8.238 26.390 -5.324 59028.7590 59028.9479 1472.0 52 3 VALIDATED 59032.7 59042
3592014102 284.646 -8.237 26.390 -5.325 59029.0067 59029.0125 72.0 52 4 VALIDATED 59034.6 59043
3592014201 284.644 -8.237 26.389 -5.322 59031.5845 59031.7218 2316.0 52 3 VALIDATED 59035.7 59045
3592014301 284.645 -8.237 26.390 -5.323 59035.1396 59035.2234 2604.0 52 3 VALIDATED 59039.6 59049
3592014401 284.646 -8.237 26.390 -5.324 59038.3028 59038.7650 1907.0 52 4 VALIDATED 59043.6 59052