A tidal disruption-like X-ray flare from the quiescent galaxy SDSS J120136.02+300305.5

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Table 1

X-ray observation log of SDSS J1201+30.

Mission^a	Date	Exp time^b	Count rate^c	Flux^d
		(s)	(count s^-1)	(10^-12 erg s^-1 cm^-2)

ROSAT	1990	500	<0.0068	<0.054
XMM slew	2010-06-10	8.9	2.1 ± 0.5
Swift	2010-06-20	2996	0.014 ± 0.002	0.56 ± 0.26
XMM pointed	2010-06-22	18865	0.37 ± 0.004	0.81 ± 0.07
Swift	2010-06-30	3252	0.041 ± 0.004	1.4 ± 0.4
Swift	2010-07-07	3580	<0.00084	<0.030
Swift	2010-07-14	2780	<0.0011	<0.039
Swift	2010-07-21	3065	<0.0010	<0.035
Swift	2010-07-28	505	<0.0059	<0.21
Swift	2010-10-24	3189	0.0037 ± 0.0013	0.13 ± 0.05
XMM pointed	2010-11-23	10697	0.079 ± 0.003	0.19 ± 0.03
XMM pointed	2010-12-23	11303	0.013 ± 0.001	0.04 ± 0.02
Swift	2011-03-25	2285	<0.0013	<0.046
Swift	2011-04-01	2912	<0.0010	<0.035
Swift	2011-04-11	2688	<0.0011	<0.039

Notes.

^(a)

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

^(b)

Useful exposure time after removing times of high background flares.

^(c)

Count rate in the band 0.2 − 2 keV.

^(d)

Unabsorbed flux, F_{0.2 − 2 keV} calculated with the best fit Bremsstrahlung model (or kT = 300 eV for the upper limits; see Sect. 4.3) and Galactic absorption of 1.4 × 10²⁰ cm^-2.

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