Table 2: Comparison between XMM-Newton Predictions of the ROSAT Surface Brightness from Observations (Coma-11) or Background Model (Sky Back) and Observed ROSAT All-Sky Survey Data.
Field XMM-Newton pn RASS

name predicted stray-light data removed flux

10^-4 PSPC-C counts s^-1 arcmin^-2

0.5-0.7 keV

Coma-11 $2.7\pm0.1$ 0.10 $2.0\pm0.5$ 0.2

Sky Back $0.66\pm0.08$ 0.05 $0.5\pm0.1$ 0.2

1.3-2.0 keV

Coma-11 $3.2\pm0.1$ 0.14 $3.2\pm0.7$ 0.2

Sky Back $0.56\pm0.04$ 0.05 $0.4\pm0.02$ 0.2

**Table 2:** Comparison between XMM-Newton Predictions of the ROSAT Surface Brightness from Observations (Coma-11) or Background Model (Sky Back) and Observed ROSAT All-Sky Survey Data.
Field	XMM-Newton pn	RASS
name	predicted	stray-light	data	removed flux
	10^-4 PSPC-C counts s^-1 arcmin^-2
0.5-0.7 keV
Coma-11	$2.7\pm0.1$	0.10	$2.0\pm0.5$	0.2
Sky Back	$0.66\pm0.08$	0.05	$0.5\pm0.1$	0.2
1.3-2.0 keV
Coma-11	$3.2\pm0.1$	0.14	$3.2\pm0.7$	0.2
Sky Back	$0.56\pm0.04$	0.05	$0.4\pm0.02$	0.2

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