XMM-Newton and SRG/eROSITA observations of the isolated neutron star candidate 4XMM J022141.5−735632

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Table 5.

Investigation of inter-epoch variability.

MJD	Data set	Counts	ℬ^a	kT	R_em^b
(days)			(%)	(eV)	(km)
55 967	EPIC	1596	12
58 970	eRASS	43	12
59 156	eRASS	25	17
59 338	eRASS	20	28		16(4)
59 405	EPIC	2679	13
59 523	eRASS	20	30

Notes. Errors are 1σ confidence levels. The model fitted to the data is (4) of Table 4 (“variable” single-temperature blackbody).

^(a)

Percentage of background in each data set (0.2 − 2 keV).

^(b)

The blackbody emission radius at infinity is computed assuming a distance of 1 kpc.

^(c)

The observed flux is in units of 10⁻¹³ erg s⁻¹ cm⁻² (0.2 − 2 keV).

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