NICER observation list: Target ID 566701

Abstract

The changing-look AGN Mrk 590 lost its soft X-ray excess as it transitioned to Type 2 around 2010. After partial re-ignition in 2017, it is now in a repeated (and possibly quasi-periodic) X-ray and UV flaring state, with an accretion rate `flickering' near the threshold to sustain a geometrically thin, thermal disk. Here, we ask to use the excellent soft X-ray sensitivity of NICER to monitor its X-ray luminosity variations, and in particular the variability of the soft X-ray excess component, during these flares. This will test the warm-Comptonization model for soft excess, providing a high dynamic range in UV and X-ray luminosities. The observations also provide X-ray SED monitoring to support a broad-scoped, multi-wavelength investigation of the current flaring activity.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
5667010101 33.640 -0.767 163.499 -56.942 59736.5911 59736.7919 1696.0 52 7 VALIDATED 59752.0 59750
5667010201 33.640 -0.767 163.499 -56.942 59745.9614 59745.9789 209.0 49 4 VALIDATED 59755.8 59759
5667010202 33.640 -0.766 163.499 -56.942 59746.0906 59746.1079 207.0 49 3 VALIDATED 59755.8 59760
5667010301 33.640 -0.766 163.499 -56.942 59756.2370 59756.2875 377.0 49 4 VALIDATED 59768.2 59770
5667010302 33.640 -0.767 163.499 -56.942 59766.2190 59766.2488 2399.0 52 5 VALIDATED 59775.9 59780
5667010401 33.639 -0.767 163.499 -56.942 59776.8629 59777.0000 1743.0 52 4 VALIDATED 59786.8 59791
5667010501 33.640 -0.767 163.501 -56.942 59786.8037 59786.9537 3371.0 52 6 VALIDATED 59800.2 59800
5667010502 33.640 -0.767 163.500 -56.942 59787.0120 59787.0181 425.0 52 5 VALIDATED 59800.2 59801
5667010601 33.640 -0.767 163.500 -56.942 59796.2229 59796.3019 275.0 52 4 VALIDATED 59807.1 59810
5667010701 33.640 -0.767 163.500 -56.942 59805.9634 59805.9958 1219.0 52 5 VALIDATED 59816.8 59819
5667010702 33.640 -0.767 163.500 -56.942 59806.1759 59806.3183 2052.0 52 5 VALIDATED 59816.9 59820
5667010801 33.639 -0.766 163.498 -56.942 59815.9738 59815.9882 1015.0 52 6 VALIDATED 59829.3 59829
5667010802 33.639 -0.766 163.498 -56.942 59816.1609 59816.3104 2043.0 52 4 VALIDATED 59829.3 59830
5667010901 33.640 -0.766 163.499 -56.941 59826.4215 59826.8792 1876.0 52 3 VALIDATED 59836.8 59840
5667011001 33.640 -0.766 163.499 -56.942 59836.4891 59836.5701 2636.0 52 5 VALIDATED 59847.0 59850
5667011101 33.640 -0.767 163.499 -56.942 59847.0021 59847.0324 2522.0 52 5 VALIDATED 59856.7 59861
5667011201 33.640 -0.767 163.500 -56.943 59856.4252 59856.4465 1786.0 52 6 VALIDATED 59865.9 59870
5667011301 33.640 -0.767 163.500 -56.942 59866.9468 59866.9609 620.0 52 5 VALIDATED 59876.8 59880
5667011302 33.640 -0.767 163.500 -56.942 59867.0113 59867.0220 158.0 52 5 VALIDATED 59876.8 59881
5667011401 33.640 -0.767 163.500 -56.942 59876.3822 59876.7206 1917.0 52 7 VALIDATED 59886.8 59890
5667011501 33.639 -0.766 163.499 -56.942 59886.7792 59886.9174 1942.0 52 5 VALIDATED 59898.3 59900
5667011601 33.640 -0.763 163.497 -56.939 59895.7954 59895.9347 1815.0 52 3 VALIDATED 59906.9 59909
5667011701 33.641 -0.766 163.500 -56.941 59906.3412 59906.4088 176.0 52 4 VALIDATED 59918.9 59920
5667011801 33.639 -0.767 163.500 -56.943 59916.2583 59916.5208 1505.0 52 3 VALIDATED 59925.9 59930
5667011901 33.640 -0.769 163.503 -56.944 59926.0000 59926.1505 2220.0 52 3 VALIDATED 59938.1 59940
5667012101 33.640 -0.767 163.500 -56.942 59952.2773 59952.9965 3498.0 52 5 VALIDATED 59969.4 59966
5667012102 33.640 -0.767 163.500 -56.942 59953.4390 59953.9523 1843.0 52 6 VALIDATED 59970.6 59967
5667012201 33.640 -0.767 163.500 -56.942 59946.0051 59946.0262 885.0 52 6 VALIDATED 59959.9 59960
5667012401 33.640 -0.767 163.500 -56.943 59962.6100 59962.6808 1268.0 52 1 VALIDATED 59971.2 59976
5667012402 33.640 -0.766 163.499 -56.942 59964.6500 59964.7336 1594.0 52 1 VALIDATED 59971.5 59978
5667012501 33.640 -0.766 163.499 -56.941 59976.8620 59977.0000 1662.0 51 6 VALIDATED 59990.7 59991
5667012601 33.641 -0.767 163.501 -56.942 59986.3998 59986.4042 295.0 51 6 VALIDATED 59997.3 60000
5667012701 33.640 -0.767 163.499 -56.942 59996.0220 59996.1051 2678.0 47 5 VALIDATED 60010.1 60010