Old Galactic novae in the eROSITA All-Sky Survey | Astronomy & Astrophysics (A&A)

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Table 1.

Best-fit spectral parameters of novae with more than 50 cts s⁻¹ in the merged spectra.

Nova	N_H^TBabs	kT_bbdy	$k T_{mkcflow}^{\max}$ $kT^{\mathrm{max}}_{\mathrm{mkcflow}}$	Ṁ	L_X-ray (0.2–2.3 keV)
	(10²¹ cm⁻²)	(eV)	(keV)	(10⁻¹¹ M_⊙ yr⁻¹)	(10³¹ erg s⁻¹)
AT Cnc	20 ± 10	50 ± 10	∼3.0	5 ± 3	0.7 ± 0.1
BD Pav	$2_{- 1}^{+ 2}$ $2^{+2}_{-1}$	–	> 40	$0 . 005_{- 0.002}^{+ 0.007}$ $0.005^{+0.007}_{-0.002}$	0.65 ± 0.2
CP Pup	3.0 ± 1.5	–	$15_{- 7}^{+ 40}$ $15^{+40}_{-7}$	$5_{- 3}^{+ 5}$ $5^{+5}_{-3}$	6 ± 3
HZ Pup	$10_{- 5}^{+ 15}$ $10^{+15}_{-5}$	100 ± 50	> 80	$2_{- 1}^{+ 3}$ $2^{+3}_{-1}$	20 ± 10
RR Pic	$0 . 2_{- 0.1}^{+ 0.3}$ $0.2^{+0.3}_{-0.1}$	–	$1 . 7_{- 0.5}^{+ 0.7}$ $1.7^{+0.7}_{-0.5}$	$1 . 4_{- 0.5}^{+ 0.7}$ $1.4^{+0.7}_{-0.5}$	$0 . 7_{- 0.2}^{+ 0.5}$ $0.7^{+0.5}_{-0.2}$
V407 Lup	2 (unconst)	–	80 (unconst)	3 (unconst)	10 (unconst)

Notes. Uncertainties are given at approximately 90% but are better constrained in the confidence contours in the associated figures for AT Cnc and BD Pav.

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