The active CGCG 077-102 NED02 galaxy within the Abell 2063 galaxy cluster

Open Access

Table 3.

Variability measures for the long-term NED02 X-ray light curves for the Chandra exposures, quantifying the variability size and timing.

	/p-value ^(a)	MDDE ^(b)	MR/MRE ^(c)	TMDDE ^(d)	WMEAN ^(e)	EMFU/EMFD ^(f)	TEMFU/TEMFD ^(g)
All four ObsIDs	15.662/	9.129	11.400/	708.51	0.132	5.588/	709.49/
	∼0		14.021			2.033	4.24
4187 omitted	2.420/	5.515	2.553/	4.24	0.183	1.766/	0.79/
	5.327 × 10⁻¹²		0.070			2.033	4.24

			ET2U/ET2D ^(h)	ET10U/ET10D ⁽ⁱ⁾	Z_WW^(j)

		All 4 ObsIDs	708.49/	n.a./	−10.768
			4.24	n.a.
		4187 Omitted	n.a/	n.a./	−12.658
			4.24	n.a

Notes.

^(a)

Reduced about the error-weighted mean count rate, and the corresponding p-value. p-values < 0.0027 are deemed significant (i.e., nonvariability is improbable) at a 3σ level.

^(b)

Maximum error-normalized count rate change, in counts per second.

^(c)

Ratio of maximum count rate to the minimum count rate (MR) and the propagated error (MRE).

^(d)

Time interval for the largest error-normalized count rate change, in days.

^(e)

Error-weighted mean count rate, in counts per second.

^(f)

Maximum upward/downward count rate ratio for i > j (EMFU), i < j (EMFD).

^(g)

Corresponding time intervals for EMFU and EMFD, in days.

^(h)

Shortest time interval (in days) for a count rate increase (ET2U) or decrease (ET2D) by a factor > 2, i.e., where . If no such interval exists, we report as n.a.

⁽ⁱ⁾

Shortest time interval (in days) for a count rate increase (ET10U) or decrease (ET10D) by a factor > 10, i.e., where .

^(j)

Z test statistic for the Wald-Wolfowitz runs test. At 5% significance (|Z|< 1.96), one should accept a null hypothesis of random variability.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.