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Table 1.

X-ray observation log of XMMSL2 J1446+68.

Mission (a) Date Exp time (b) Flux (c)
(s)
ROSAT-Survey 1990-07-11 958.2 < 0.07
XMM-Newton slew 2004-11-19 10.5 < 0.78
XMM-Newton slew 2013-11-03 4.9 < 1.05
XMM-Newton slew 2014-04-24 8.2 < 0.99
XMM-Newton slew 2014-11-07 9.5 < 0.55
XMM-Newton slew 2016-08-22 8.0 1.68 ± 0.59
XMM-Newton pointed 2016-09-08 3918 0.83 ± 0.03
Swift 2016-09-12 2899 1.06 ± 0.13
Swift 2016-09-15 1071 0.50 ± 0.12
XMM-Newton pointed 2016-09-16 16140 0.84 ± 0.02
Swift 2016-09-20 2085 1.01 ± 0.20
Swift 2016-09-27 2073 1.01 ± 0.18
Swift 2016-10-04 1731 1.31 ± 0.18
Swift 2016-10-10 1064 0.82 ± 0.16
Swift 2016-10-13 1211 0.98 ± 0.18
Swift 2016-10-17 1963 1.13 ± 0.16
Swift 2016-10-22 879 1.05 ± 0.25
XMM-Newton pointed 2016-10-30 5990 0.95 ± 0.03
Swift 2016-11-02 2160 0.96 ± 0.13
Swift 2016-11-23 1408 0.81 ± 0.17
XMM-Newton pointed 2016-11-27 7982 0.69 ± 0.02
Swift 2016-12-13 2138 0.49 ± 0.10
Swift 2017-01-13 682 0.21 ± 0.13
Swift 2017-01-26 1885 0.37 ± 0.23
Swift 2017-02-17 1923 0.15 ± 0.06
Swift 2017-03-28 2210 0.126 ± 0.048
Swift 2017-04-20 1975 0.186 ± 0.057
Swift 2017-08-14 4947 0.118 ± 0.028
XMM-Newton pointed 2018-04-25 17820 0.016 ± 0.003
Swift 2018-12-20 2934 0.025 ± 0.015

Notes.

(a)

XMM-Newton, EPIC-pn camera: slew observations performed in full frame mode with the medium filter; pointed observations performed in full frame mode with the thin1 filter. Swift-XRT observations performed in pc mode.

(b)

Useful exposure time after removing times of high background flares.

(c)

Absorbed flux in the 0.2–2 keV band, units of 10−12ergs s−1cm−2. For simplicity this was calculated using a power-law model of slope 2.5 and Galactic absorption of 1.9 × 1020cm−2 in all cases.

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