Study of the X-ray activity of Sagittarius A* during the 2011 XMM-Newton campaign

Enmanuelle Mossoux; Nicolas Grosso; Frédéric H. Vincent; Delphine Porquet

doi:10.1051/0004-6361/201424682

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Volume 573 (January 2015)

A&A, 573 (2015) A46

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Table 2

Characteristics of the X-ray flares observed by XMM-Newton/EPIC in 2011.

Flare	Day	Start time^a	End time^a	Duration	Total^b	Peak^c	^d
(#)	(yy-mm-dd)	(hh:mm:ss)	(hh:mm:ss)	(s)	(cts)	(count s^-1)	(10³⁴ erg s^-1)

1	2011-03-30	17:46:20.69	18:19:40.86	2000.16	211 ± 25	0.284 ± 0.013
2	2011-04-03	≤08:16:35.65	08:41:02.04	≥1457.67	≥ 154 ± 24	0.165 ± 0.012	≥2.9

Notes. assuming a distance of 8 kpc, see Sect. 4 for details.

^(a)

Start and end times (TT) of the flare time interval defined by the Bayesian-blocks algorithm (Scargle et al. 2013a) on the EPIC/pn data;

^(b)

total EPIC/pn counts in the 2−10 keV energy band obtained in the smoothed light curve during the flare interval (determined by Bayesian blocks) after subtractingf the non-flaring level obtained with the Bayesian-blocks algorithm;

^(c)

EPIC pn count rate in the 2−10 keV energy band at the flare peak (smoothed light curves) after subtracting the non-flaring level;

^(d)

unabsorbed 2−10 keV average luminosity of the flare computed from the total counts collected during the flare (i.e., the average count rate) and

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