NICER observation list: Target ID 253501

Abstract

EX Hya is one of the soft X-ray brightest cataclysmic variables (CVs), and belongs to the intermiedate polar (IP) class, in which the accretion disk is disrupted by the magnetic field of the white dwarf (WD) and the subsequent accretion flow is channeled onto the magnetic pole regions. A strong shock forms, and the observed X-rays are emitted in the post-shock region. EX Hya is the prototype of low-luminosity IPs whose shock temperature is lower than expected from its WD mass. It is vigorously debated whether this is caused by a small inner radius of the disk, or by a tall shock. Here we propose to use the well-known partial X-ray eclipse of EX Hya to constrain the size and physical properties of its post-shock region.
Obsid RA DEC l b Start End Exposure Number of
Modules		 Number of
Processing		 Status of
Processing		 Date of
Processing		 Public
date
2535010101 193.105 -29.250 303.189 33.622 58642.1032 58642.1190 993.0 52 3 VALIDATED 58646.6 58656
2535010201 193.104 -29.249 303.189 33.622 58643.2646 58643.2821 1307.0 52 3 VALIDATED 58648.9 58657
2535010301 193.105 -29.250 303.189 33.621 58643.3289 58643.3470 1338.0 52 3 VALIDATED 58648.9 58657
2535010401 193.104 -29.249 303.188 33.622 58643.3956 58643.4113 1256.0 52 3 VALIDATED 58648.9 58657
2535010501 193.104 -29.250 303.188 33.621 58643.4625 58643.4778 1180.0 52 3 VALIDATED 58648.9 58657
2535010601 193.104 -29.249 303.188 33.622 58645.5833 58645.6022 1288.0 52 2 VALIDATED 58652.6 58659
2535010701 193.103 -29.248 303.187 33.623 58645.6482 58645.6667 1296.0 52 2 VALIDATED 58652.6 58659
2535010801 193.103 -29.249 303.187 33.622 58645.7122 58645.7343 1570.0 52 2 VALIDATED 58652.6 58659
2535010901 193.103 -29.249 303.187 33.622 58645.7768 58645.8000 1678.0 52 2 VALIDATED 58652.7 58659
2535011001 193.105 -29.249 303.189 33.622 58646.7442 58646.7670 1708.0 52 3 VALIDATED 58652.9 58660
2535011101 193.104 -29.248 303.188 33.623 58646.8086 58646.8266 1293.0 52 3 VALIDATED 58652.9 58660
2535011201 193.104 -29.249 303.188 33.623 58646.8731 58646.8962 1300.0 52 3 VALIDATED 58652.9 58660
2535011301 193.103 -29.248 303.187 33.623 58646.9380 58646.9618 927.0 52 3 VALIDATED 58652.9 58660
2535011401 193.102 -29.251 303.187 33.620 58667.8247 58667.8378 541.0 52 3 VALIDATED 58671.6 58681
2535011501 193.102 -29.251 303.186 33.621 58670.0816 58670.1021 1683.0 52 3 VALIDATED 58674.8 58684
2535011601 193.100 -29.249 303.184 33.622 58682.0253 58682.0387 1097.0 52 2 VALIDATED 58687.8 58696
2535011701 193.101 -29.249 303.185 33.623 58682.0873 58682.1030 1131.0 52 2 VALIDATED 58687.8 58696
2535011801 193.101 -29.248 303.185 33.623 58683.0441 58683.0630 1487.0 52 2 VALIDATED 58688.6 58697
2535011901 193.101 -29.249 303.185 33.622 58683.1106 58683.1345 1922.0 52 2 VALIDATED 58688.6 58697
2535012001 193.101 -29.249 303.185 33.623 58683.1796 58683.1991 1601.0 52 2 VALIDATED 58688.6 58697
2535012101 193.101 -29.248 303.185 33.623 58683.2454 58683.2634 1436.0 52 2 VALIDATED 58688.6 58697
2535012201 193.101 -29.249 303.184 33.623 58685.3606 58685.3904 2124.0 52 2 VALIDATED 58690.1 58699
2535012301 193.100 -29.247 303.184 33.625 58685.4250 58685.4505 1637.0 52 2 VALIDATED 58690.1 58699
2535012401 193.100 -29.249 303.184 33.623 58685.4958 58685.5185 1825.0 52 2 VALIDATED 58690.1 58699
2535012501 193.101 -29.248 303.185 33.623 58685.5678 58685.5840 1329.0 52 2 VALIDATED 58690.1 58699
2535012601 193.101 -29.249 303.185 33.623 58685.6248 58685.6484 1310.0 52 2 VALIDATED 58690.1 58699
2535012701 193.100 -29.248 303.184 33.623 58686.3920 58686.4174 1501.0 52 1 VALIDATED 58690.2 58700
2535012801 193.098 -29.247 303.182 33.625 58686.4576 58686.4822 1540.0 52 1 VALIDATED 58690.2 58700
2535012901 193.099 -29.247 303.183 33.624 58686.5219 58686.5472 1217.0 52 1 VALIDATED 58690.2 58700
2535013001 193.099 -29.247 303.183 33.624 58686.6509 58686.6775 1124.0 52 1 VALIDATED 58690.2 58700
2535013101 193.099 -29.247 303.182 33.624 58688.7782 58688.8069 1654.0 52 3 VALIDATED 58693.6 58702
2535013201 193.099 -29.248 303.183 33.623 58688.8417 58688.8713 2237.0 52 3 VALIDATED 58693.6 58702
2535013301 193.098 -29.247 303.182 33.624 58688.9071 58688.9359 2370.0 52 3 VALIDATED 58693.6 58702
2535013401 193.100 -29.246 303.183 33.625 58690.0014 58690.0259 1796.0 52 2 VALIDATED 58695.9 58704
2535013501 193.098 -29.247 303.182 33.624 58690.0675 58690.0907 1795.0 52 2 VALIDATED 58695.9 58704
2535013601 193.100 -29.246 303.183 33.625 58690.1303 58690.1604 2181.0 52 2 VALIDATED 58695.9 58704
2535013701 193.099 -29.246 303.183 33.625 58690.1947 58690.2248 2292.0 52 2 VALIDATED 58695.9 58704
2535013801 193.098 -29.247 303.182 33.625 58691.2280 58691.2560 2211.0 52 1 VALIDATED 58696.0 58705
2535013901 193.100 -29.248 303.184 33.623 58692.3225 58692.3487 1754.0 52 2 VALIDATED 58696.7 58706
2535014001 193.099 -29.245 303.183 33.626 58692.3873 58692.4133 1699.0 52 2 VALIDATED 58696.7 58706