An X-ray flaring event and a variable soft X-ray excess in the Seyfert LCRS B040659.9–385922 as detected with eROSITA

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Volume 691 (November 2024)

A&A, 691 (2024) A102

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Table 1.

Observation log of all X-ray data.

Telescope/Instrument	Obs. start	Exposure time ^(a)	f_{0.2 − 5.0 keV}^(b)
eRASS1	11 February 2020	0.58 (0.31)	$0 . 29_{- 0.06}^{+ 0.10}$ $0.29^{+0.10}_{-0.06}$
eRASS2	9 August 2020	0.52 (0.27)	$1 . 21_{- 0.13}^{+ 0.16}$ $1.21^{+0.16}_{-0.13}$
eRASS3	29 January 2021	0.38 (0.21)	$1 . 16_{- 0.18}^{+ 0.15}$ $1.16^{+0.15}_{-0.18}$
eRASS4	6 August 2021	0.39 (0.22)	$5 . 19_{- 0.28}^{+ 0.32}$ $5.19^{+0.32}_{-0.28}$
XMM-Newton EPIC	21 August 2021	26.40 (16.82, 24.15)	$5 . 36_{- 0.05}^{+ 0.02}$ $5.36^{+0.02}_{-0.05}$
NICER	24 August 2021	14.87 (7.42)	$5 . 83_{- 0.06}^{+ 0.08}$ $5.83^{+0.08}_{-0.06}$
NICER	25 November 2021	21.84 (21.58)	$3 . 99_{- 0.25}^{+ 0.02}$ $3.99^{+0.02}_{-0.25}$
eRASS5	31 January 2022	0.42 (0.20)	$1 . 92_{- 0.21}^{+ 0.24}$ $1.92^{+0.24}_{-0.21}$
XMM-Newton EPIC	10 March 2022	25.65 (17.06, 19.72)	$2 . 14_{- 0.07}^{+ 0.02}$ $2.14^{+0.02}_{-0.07}$

Notes.

^(a)

Net exposure in kiloseconds. Values outside parentheses refer to exposure times before any screening criteria are applied; values inside parentheses are good exposure times after screening. For XMM-Newton, the two good exposure times listed refer to the pn and to each MOS, respectively. In addition, for eRASS, the values outside parentheses are times in the field of view only, that is, not corrected for vignetting. The values inside parentheses are corrected for vignetting.

^(b)

Flux over 0.2–5.0 keV in units of 10⁻¹² erg cm⁻² s⁻¹. All flux values are determined based on spectral fits in Sect. 3.

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