NICER observation list: Target ID 466201

Abstract

ESO 253-G003/ASASSN-14ko is a highly unique AGN that undergoes periodic flares every ~114 days with a negative, non-zero period derivative. There were 17 outbursts detected in V-/g-band ASAS-SN survey data during the last six years, with missing outbursts due only to seasonal gaps. Numerous flaring events are highly unusual for an AGN, which normally vary at a low-level following a damped random walk model. The precise origin of these flares remains unknown but this could be the first example of a repeating partial tidal disruption event (TDE). We propose to obtain NICER observations of three upcoming outbursts, which will be complemented by UV/optical monitoring, in order to fully characterize the X-ray evolution during the flares and compare the emission between flares over time.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
4662010101 81.326 -46.006 251.975 -33.707 59274.1366 59274.5333 3775.0 52 3 VALIDATED 59278.6 59288
4662010301 81.325 -46.006 251.975 -33.707 59283.8005 59283.9380 1484.0 52 3 VALIDATED 59293.8 59297
4662010302 81.325 -46.005 251.975 -33.707 59283.9939 59284.0678 1149.0 52 3 VALIDATED 59293.8 59298
4662010401 81.323 -46.004 251.973 -33.708 59289.8671 59289.9553 2580.0 52 3 VALIDATED 59294.1 59303
4662010501 81.322 -46.005 251.974 -33.709 59294.5222 59294.8000 2538.0 52 3 VALIDATED 59298.6 59308
4662010601 81.325 -46.006 251.975 -33.707 59299.3597 59299.5051 2336.0 52 3 VALIDATED 59303.7 59313
4662010701 81.325 -46.006 251.975 -33.707 59303.6808 59303.7646 1690.0 52 6 VALIDATED 59317.9 59317
4662010801 81.325 -46.006 251.975 -33.707 59304.7173 59304.9222 2069.0 52 5 VALIDATED 59314.8 59318
4662011501 81.326 -46.008 251.978 -33.706 59311.1433 59311.6012 2953.0 52 6 VALIDATED 59321.8 59325
4662011601 81.325 -46.006 251.976 -33.707 59312.0463 59312.3773 2884.0 52 6 VALIDATED 59321.8 59326
4662011701 81.326 -46.006 251.975 -33.707 59312.8206 59312.9560 1101.0 52 7 VALIDATED 59322.9 59326
4662011702 81.326 -46.008 251.978 -33.707 59313.0141 59313.9243 4786.0 52 6 VALIDATED 59324.7 59327
4662011801 81.326 -46.007 251.976 -33.706 59313.9845 59313.9877 211.0 52 6 VALIDATED 59324.8 59327
4662011802 81.326 -46.007 251.977 -33.706 59314.0491 59314.9571 4966.0 52 5 VALIDATED 59324.8 59328
4662011901 81.326 -46.008 251.979 -33.706 59315.0178 59315.9900 1856.0 52 8 VALIDATED 59330.8 59329
4662012001 81.326 -46.007 251.977 -33.706 59316.0511 59316.9601 2554.0 52 6 VALIDATED 59330.1 59330
4662012101 81.326 -46.006 251.975 -33.706 59317.0197 59317.9953 1371.0 52 7 VALIDATED 59330.1 59331
4662012201 81.326 -46.005 251.975 -33.706 59318.2475 59318.8362 1690.0 52 7 VALIDATED 59330.8 59332
4662012301 81.326 -46.006 251.975 -33.706 59319.1530 59319.9356 1513.0 52 7 VALIDATED 59331.6 59333
4662012302 81.326 -46.006 251.975 -33.706 59320.0581 59320.0704 118.0 52 5 VALIDATED 59331.6 59334
4662012401 81.326 -46.006 251.975 -33.706 59320.1875 59320.9104 3166.0 52 6 VALIDATED 59332.6 59334
4662012501 81.327 -46.006 251.975 -33.706 59321.0106 59321.6856 1842.0 52 6 VALIDATED 59332.6 59335
4662013301 81.328 -46.004 251.974 -33.705 59329.4662 59329.9900 4612.0 52 5 VALIDATED 59340.0 59343
4662013302 81.327 -46.006 251.975 -33.706 59330.0470 59330.0546 604.0 52 4 VALIDATED 59340.0 59344
4662013401 81.327 -46.005 251.975 -33.706 59330.1743 59330.9609 6429.0 52 5 VALIDATED 59341.8 59344
4662013501 81.326 -46.006 251.975 -33.706 59331.0141 59331.6021 7225.0 52 5 VALIDATED 59341.8 59345
4662013601 81.326 -46.006 251.975 -33.706 59331.6589 59331.9894 2705.0 52 5 VALIDATED 59341.9 59345
4662013602 81.326 -46.006 251.975 -33.706 59332.0467 59332.9627 9423.0 52 9 VALIDATED 59345.6 59346
4662013701 81.326 -46.006 251.976 -33.706 59333.0145 59333.9956 8002.0 52 7 VALIDATED 59344.7 59347
4662013801 81.326 -46.006 251.975 -33.707 59334.0483 59334.9639 8838.0 52 6 VALIDATED 59344.7 59348
4662013802 81.326 -46.006 251.975 -33.707 59335.0165 59335.9887 9545.0 52 5 VALIDATED 59345.7 59349
4662013803 81.326 -46.006 251.975 -33.707 59336.0494 59336.9007 7698.0 52 6 VALIDATED 59346.6 59350
4662013804 81.325 -46.006 251.975 -33.707 59337.0176 59337.9336 10899.0 52 6 VALIDATED 59347.6 59351
4662013805 81.325 -46.006 251.976 -33.707 59338.0497 59338.9794 9056.0 52 10 VALIDATED 59357.6 59352
4662013901 81.326 -46.006 251.976 -33.707 59339.2114 59339.3539 2741.0 52 6 VALIDATED 59348.7 59353
4662014001 81.325 -46.006 251.976 -33.707 59344.1315 59344.5347 3598.0 52 7 VALIDATED 59356.6 59358
4662014101 81.325 -46.006 251.975 -33.707 59349.2325 59349.5678 2924.0 52 7 VALIDATED 59359.7 59363
4662014201 81.325 -46.005 251.975 -33.707 59353.8650 59353.9387 384.0 52 6 VALIDATED 59363.6 59367
4662014202 81.325 -46.005 251.975 -33.707 59354.0634 59354.3920 292.0 52 6 VALIDATED 59363.7 59368
4662014301 81.325 -46.006 251.975 -33.707 59359.2395 59359.4944 2309.0 52 6 VALIDATED 59369.8 59373
4662014401 81.325 -46.004 251.974 -33.707 59360.6525 59360.6566 101.0 52 7 VALIDATED 59373.7 59374
4662014402 81.324 -46.005 251.975 -33.708 59364.0683 59364.1576 2441.0 52 5 VALIDATED 59373.8 59378
4662014501 81.325 -46.006 251.975 -33.707 59368.7218 59368.7936 486.0 52 7 VALIDATED 59378.7 59382
4662014502 81.325 -46.006 251.975 -33.707 59369.1736 59369.3840 1681.0 52 6 VALIDATED 59378.7 59383
4662014601 81.326 -46.006 251.976 -33.706 59372.0197 59372.4157 0.0 52 5 VALIDATED 59381.9 59386
4662014701 81.325 -46.008 251.977 -33.707 59381.2208 59381.5512 1993.0 52 7 VALIDATED 59391.7 59395
4662014901 81.329 -46.008 251.979 -33.704 59389.9141 59389.9924 1481.0 52 5 VALIDATED 59401.9 59403
4662014902 81.329 -46.008 251.978 -33.704 59390.0429 59390.0569 784.0 52 5 VALIDATED 59401.9 59404
4662015001 81.329 -46.009 251.980 -33.704 59393.0162 59393.0285 197.0 52 5 VALIDATED 59403.8 59407
4662015002 81.329 -46.007 251.977 -33.704 59394.1087 59394.3209 2354.0 52 5 VALIDATED 59405.0 59408
4662015003 81.330 -46.007 251.977 -33.704 59395.0771 59395.6119 1922.0 52 5 VALIDATED 59407.8 59409
4662015004 81.322 -46.012 251.982 -33.710 59396.0616 59396.0640 0.0 52 5 VALIDATED 59407.9 59410
4662015101 81.330 -46.006 251.975 -33.704 59399.3360 59399.4255 3352.0 52 6 VALIDATED 59409.7 59413
4662015201 81.326 -46.005 251.975 -33.707 59404.2423 59404.7713 2674.0 52 6 VALIDATED 59415.7 59418
4662015301 81.325 -46.006 251.975 -33.707 59409.5539 59409.6951 1129.0 52 8 VALIDATED 59422.6 59423
4662015401 81.325 -46.006 251.975 -33.707 59412.5235 59412.6650 1236.0 52 6 VALIDATED 59422.6 59426
4662015501 81.325 -46.006 251.975 -33.707 59413.4925 59413.6336 1321.0 52 7 VALIDATED 59423.6 59427
4662015601 81.325 -46.006 251.975 -33.707 59414.8475 59414.9894 2496.0 52 6 VALIDATED 59424.6 59428
4662015701 81.325 -46.006 251.976 -33.707 59415.8169 59415.9572 1886.0 52 6 VALIDATED 59425.7 59429
4662015801 81.325 -46.006 251.975 -33.707 59416.3176 59416.9252 2194.0 52 7 VALIDATED 59426.6 59430
4662015901 81.325 -46.006 251.975 -33.707 59417.0854 59417.2324 2265.0 52 6 VALIDATED 59426.7 59431
4662016001 81.326 -46.007 251.976 -33.706 59418.5930 59418.6049 325.0 52 7 VALIDATED 59428.7 59432
4662016301 81.325 -46.006 251.976 -33.707 59421.3109 59421.3808 449.0 52 6 VALIDATED 59430.7 59435
4662016501 81.326 -46.006 251.976 -33.707 59423.0535 59423.8340 3047.0 52 9 VALIDATED 59471.7 59437
4662016601 81.325 -46.005 251.975 -33.707 59424.0858 59424.5306 3569.0 52 9 VALIDATED 59471.8 59438
4662016701 81.326 -46.006 251.975 -33.706 59425.1145 59425.2352 1345.0 52 7 VALIDATED 59471.8 59439
4662017801 81.325 -46.005 251.974 -33.707 59436.9048 59436.9778 147.0 52 5 VALIDATED 59467.3 59450
4662017802 81.323 -46.005 251.974 -33.708 59437.1002 59437.1081 0.0 52 5 VALIDATED 59468.1 59451
4662017901 81.325 -46.006 251.975 -33.707 59437.9403 59437.9500 466.0 52 6 VALIDATED 59468.1 59451
4662017902 81.324 -46.005 251.974 -33.707 59438.0019 59438.1366 556.0 52 5 VALIDATED 59468.1 59452
4662018001 81.325 -46.006 251.975 -33.707 59438.9130 59438.9852 1042.0 52 7 VALIDATED 59468.2 59452
4662018002 81.323 -46.004 251.973 -33.709 59439.0343 59439.0505 362.0 52 6 VALIDATED 59468.2 59453
4662018101 81.324 -46.005 251.975 -33.707 59439.7534 59439.9560 3125.0 52 7 VALIDATED 59468.2 59453
4662018201 81.324 -46.004 251.973 -33.707 59440.8456 59440.9900 2871.0 52 5 VALIDATED 59468.2 59454
4662018301 81.324 -46.006 251.975 -33.708 59441.6852 59441.8944 3342.0 52 5 VALIDATED 59470.9 59455
4662018401 81.324 -46.006 251.975 -33.708 59442.6595 59442.8634 3055.0 52 7 VALIDATED 59471.0 59456
4662018501 81.324 -46.005 251.974 -33.708 59437.0340 59437.0407 0.0 52 5 VALIDATED 59467.3 59451
4662018502 81.325 -46.006 251.975 -33.707 59443.6940 59443.8972 3232.0 52 7 VALIDATED 59471.0 59457
4662018503 81.325 -46.006 251.975 -33.707 59444.5345 59444.7363 2387.0 52 7 VALIDATED 59471.1 59458
4662018601 81.325 -46.006 251.975 -33.707 59444.7926 59444.8009 620.0 52 7 VALIDATED 59471.1 59458
4662018701 81.320 -46.003 251.971 -33.710 59449.9436 59449.9512 0.0 52 7 VALIDATED 59471.3 59463
4662018702 81.320 -46.003 251.971 -33.710 59450.0083 59450.1451 565.0 52 6 VALIDATED 59471.3 59464
4662018801 81.325 -46.006 251.975 -33.707 59454.4692 59454.9273 2029.0 52 5 VALIDATED 59464.9 59468
4662018901 81.327 -46.008 251.978 -33.706 59459.3439 59459.4898 2969.0 52 5 VALIDATED 59468.7 59473
4662019001 81.326 -46.006 251.975 -33.706 59464.0653 59464.1428 2448.0 52 4 VALIDATED 59475.0 59478
4662019101 81.329 -46.006 251.976 -33.704 59469.2198 59469.3109 2412.0 52 4 VALIDATED 59478.8 59483
4662019201 81.325 -46.006 251.975 -33.707 59473.5592 59473.7657 1315.0 52 5 VALIDATED 59484.9 59487
4662019301 81.325 -46.006 251.975 -33.707 59481.2229 59481.4984 1852.0 52 5 VALIDATED 59490.7 59495
4662019401 81.325 -46.006 251.975 -33.707 59485.4407 59485.5815 1475.0 52 7 VALIDATED 59495.6 59499
4662019501 81.326 -46.006 251.976 -33.707 59489.2317 59489.3731 2254.0 52 6 VALIDATED 59498.7 59503
4662019601 81.324 -46.012 251.983 -33.708 59494.9923 59495.3234 733.0 52 7 VALIDATED 59504.6 59509
4662019701 81.325 -46.006 251.975 -33.707 59499.4286 59499.5711 1952.0 52 7 VALIDATED 59509.6 59513
4662019801 81.326 -46.006 251.976 -33.706 59504.4227 59504.6255 3017.0 52 7 VALIDATED 59514.6 59518
4662019901 81.323 -46.004 251.972 -33.708 59509.7588 59509.9035 1645.0 52 6 VALIDATED 59519.7 59523