X-ray properties of massive compact relic galaxies

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Table 3.

Unabsorbed X-ray luminosities of the galactic diffuse emission measured within 20 r_eff.

Galaxy	$L_{0.5 - 2 keV}^{ACIS - S}$ $L^{\mathrm{ACIS-S}}_{0.5{-}2\,\mathrm{keV}}$	$L_{0.5 - 2 keV}^{MOS 1}$ $L^{\mathrm{MOS1}}_{0.5{-}2\,\mathrm{keV}}$	$L_{0.5 - 2 keV}^{MOS 2}$ $L^{\mathrm{MOS2}}_{0.5{-}2\,\mathrm{keV}}$	$L_{0.5 - 2 keV}^{PN}$ $L^{\mathrm{PN}}_{0.5{-}2\,\mathrm{keV}}$
Galaxy	[erg s⁻¹]	[erg s⁻¹]	[erg s⁻¹]
MRK 1216	(9.16 ± 0.13)×10⁴¹	(8.14 ± 0.06)×10⁴¹		(7.16 ± 0.04)×10⁴¹
NGC 472	< 4.47 × 10⁴⁰	(2.33 ± 0.69)×10⁴⁰	< 1.21 × 10⁴⁰	(4.06 ± 1.35)×10³⁹
PGC 32873	(1.09 ± 0.06)×10⁴¹	(9.18 ± 0.23)×10⁴⁰		(7.33 ± 0.16)×10⁴⁰
PGC 70520	< 2.70 × 10⁴⁰	(4.88 ± 1.92)×10³⁹	(3.39 ± 1.75)×10³⁹	(4.00 ± 1.04)×10³⁹

Notes. Luminosities are determined by spectral modeling for MRK 1216 and PGC 32873, and by photometric measurements for NGC 472 and PGC 70520. The spectra from MOS1 and MOS2 were fit simultaneously. Error bars represent 1σ statistical uncertainties assuming Gaussian statistics; for non-detections, we present the 1σ upper limits. The eFEDs targets are not listed, as their XMM-Newton data is dominated by a central AGN (active galactic nucleus), with no significant diffuse emission detected (Section 4.2).

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