Highly variable AGN from the XMM-Newton slew survey

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Table B.2

Allowed column densities of neutral hydrogen.

XMMSL1 name	Obs. date	C_red	Spectral	N _H,max ^a	Implied^b	Observed^c	Can it explain
			index	(10²⁰ cm^-2)	flux change	flux change	variability?

J005953.1+314934	2011-08-28	0.87	1.9	1.6	1.1	1.9	no
J020303.1-074154	2010-03-01	0.90	1.7^d	1.3	1.2	5.8	no
J024916.6-041244	2007-06-27	0.95	1.7^d	2.3	1.2	17	no
J044347.0+285822	2010-07-27	1.07	1.7^d	554	117	7.3	yes
J045740.0-503053	2010-10-03	1.00	1.7^d	16.9	2.0	17	no
J064541.1-590851	2010-12-26	0.77	1.9	5.58	1.2	1.4	maybe
J082753.7+521800	2010-03-11	1.12	2.0	4.76	1.2	2.7	no
J090421.2+170927	2010-06-12	1.21	1.7^d	75	2.7	3.6	no
J093922.5+370945	2011-03-28	1.17	3.0	12.8	2.5	3.4	no
J100534.8+392856	2011-01-01	1.22	1.9	1.55	1.1	1.7	no
J104745.6-375932	2010-04-11	0.90	2.0	2.97	1.2	1.6	no
J112841.5+575017	2011-03-01	0.86	1.7^d	7.20	1.5	–	Swift point brightest
J121335.0+325609	2006-06^e	0.97	1.4	6.6	1.3	4.9	no
J162553.4+562735	2010-07-10	0.88	2.3	10.2	1.6	3.2	no
J173739.3-595625	2008-11-02	0.91	1.9	1.4	1.1	2.0	no
J183521.4+611942	2011-02-01	1.51	1.7^d	16.2	1.4	5.4	no

Notes.

^(a)

Maximum neutral Hydrogen column allowed by power law fit to the Swift spectrum (90% confidence).

^(b)

Fractional change in observed 0.2–2 keV flux due to this N_H column.

^(c)

Change in 0.2–2 keV flux actually observed between the highest flux measurement and the Swift observation.

^(d)

Power law slope fixed at 1.7 during fit.

^(e)

Merged spectra taken between 2006-06-02 and 2006-06-12.

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