A first systematic characterization of cataclysmic variables in SRG/eROSITA surveys

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Volume 690 (October 2024)

A&A, 690 (2024) A243

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Table 4.

X-ray spectral parameters for the brightest polars in S45.

Name	B	Counts	T_bb	n_H	χ²/d.o.f.	F_soft	F_hard	F_soft/F_hard
			[eV]	[10²⁰ cm⁻²]
1RXS J100734.4-201731	94	377	$57 . 0_{- 3.4}^{+ 2.7}$ $57.0^{+2.7}_{-3.4}$	$0 . 0_{- 0.0}^{+ 0.7}$ $0.0^{+0.7}_{-0.0}$	1.01	$0 . 62_{- 0.13}^{+ 0.13}$ $0.62^{+0.13}_{-0.13}$	$0 . 05_{- 0.04}^{+ 0.01}$ $0.05^{+0.01}_{-0.04}$	$11 . 7_{- 4.1}^{+ 35.1}$ $11.7^{+35.1}_{-4.1}$
1RXS J152506.9-032647	–	618	–	$1 . 8_{- 1.8}^{+ 3.1}$ $1.8^{+3.1}_{-1.8}$	0.83	–	$0 . 65_{- 0.07}^{+ 0.07}$ $0.65^{+0.07}_{-0.07}$	–
BL Hyi	23	1288	$18 . 7_{- 4.3}^{+ 5.5}$ $18.7^{+5.5}_{-4.3}$	$0 . 0_{- 0.0}^{+ 82}$ $0.0^{+82}_{-0.0}$	1.06	$23_{- 20}^{+ 320}$ $23^{+320}_{-20}$	$0 . 93_{- 0.09}^{+ 0.01}$ $0.93^{+0.01}_{-0.09}$	$25_{- 21}^{+ 385}$ $25^{+385}_{-21}$
CD Ind	11	825	–	$1 . 5_{- 1.5}^{+ 1.7}$ $1.5^{+1.7}_{-1.5}$	1.30	–	$1 . 26_{- 0.10}^{+ 0.11}$ $1.26^{+0.11}_{-0.10}$	–
CTCV J1928-5001	20	786	$12 . 2_{- 1.1}^{+ 0.5}$ $12.2^{+0.5}_{-1.1}$	$0 . 0_{- 0.0}^{+ 1.6}$ $0.0^{+1.6}_{-0.0}$	1.03	n.a.	n.a.	n.a.
CW Hyi	13	968	$51 . 6_{- 8.9}^{+ 5.0}$ $51.6^{+5.0}_{-8.9}$	$0 . 3_{- 0.3}^{+ 1.9}$ $0.3^{+1.9}_{-0.3}$	0.86	$0 . 23_{- 0.07}^{+ 0.46}$ $0.23^{+0.46}_{-0.07}$	$0 . 46_{- 0.04}^{+ 0.04}$ $0.46^{+0.04}_{-0.04}$	$0 . 5_{- 0.2}^{+ 1.1}$ $0.5^{+1.1}_{-0.2}$
eRASS J1425-31	–	375	–	$6 . 2_{- 4.7}^{+ 5.4}$ $6.2^{+5.4}_{-4.7}$	1.13	–	$0 . 53_{- 0.08}^{+ 0.08}$ $0.53^{+0.08}_{-0.08}$	–
IGR J14536-5522	20	830	–	$5 . 2_{- 2.2}^{+ 2.4}$ $5.2^{+2.4}_{-2.2}$	1.17	–	$0 . 97_{- 0.09}^{+ 0.09}$ $0.97^{+0.09}_{-0.09}$	–
IW Eri	–	704	–	$0 . 0_{- 0.0}^{+ 1.5}$ $0.0^{+1.5}_{-0.0}$	0.74	–	$0 . 59_{- 0.03}^{+ 0.05}$ $0.59^{+0.05}_{-0.03}$	–
PBC J0658.0-1746	–	402	$32_{- 17}^{+ 30}$ $32^{+30}_{-17}$	$0 . 0_{- 0.0}^{+ 3.0}$ $0.0^{+3.0}_{-0.0}$	0.78	$0 . 2_{- 0.1}^{+ 2.3}$ $0.2^{+2.3}_{-0.1}$	$0 . 70_{- 0.08}^{+ 0.08}$ $0.70^{+0.08}_{-0.08}$	$0 . 3_{- 0.2}^{+ 3.7}$ $0.3^{+3.7}_{-0.2}$
PBC J0706.7+0327	–	798	–	$0 . 0_{- 0.0}^{+ 1.0}$ $0.0^{+1.0}_{-0.0}$	0.76	–	$1 . 7_{- 0.1}^{+ 0.1}$ $1.7^{+0.1}_{-0.1}$	–
RX J0154.0-5947	–	721	$38 . 1_{- 5.6}^{+ 5.9}$ $38.1^{+5.9}_{-5.6}$	$0 . 0_{- 0.0}^{+ 82}$ $0.0^{+82}_{-0.0}$	1.54	$0 . 63_{- 0.26}^{+ 0.56}$ $0.63^{+0.56}_{-0.26}$	$0 . 45_{- 0.04}^{+ 0.04}$ $0.45^{+0.04}_{-0.04}$	$1 . 4_{- 0.6}^{+ 1.5}$ $1.4^{+1.5}_{-0.6}$
RX J0649.8-0737	–	482	$48 . 4_{- 7.8}^{+ 9.5}$ $48.4^{+9.5}_{-7.8}$	$4 . 0_{- 2.7}^{+ 3.2}$ $4.0^{+3.2}_{-2.7}$	1.04	$1 . 9_{- 1.3}^{+ 5.7}$ $1.9^{+5.7}_{-1.3}$	$0 . 43_{- 0.08}^{+ 0.06}$ $0.43^{+0.06}_{-0.08}$	$4_{- 3}^{+ 17}$ $4^{+17}_{-3}$
Swift J0503.7-2819	–	548	–	$3 . 6_{- 2.8}^{+ 3.2}$ $3.6^{+3.2}_{-2.8}$	1.10	–	$0 . 45_{- 0.05}^{+ 0.06}$ $0.45^{+0.06}_{-0.05}$	–
UW Pic	–	647	$35 . 4_{- 3.5}^{+ 3.5}$ $35.4^{+3.5}_{-3.5}$	$0 . 0_{- 0.0}^{+ 82}$ $0.0^{+82}_{-0.0}$	1.13	$0 . 47_{- 0.14}^{+ 0.22}$ $0.47^{+0.22}_{-0.14}$	$0 . 14_{- 0.02}^{+ 0.02}$ $0.14^{+0.02}_{-0.02}$	$3 . 3_{- 1.2}^{+ 2.2}$ $3.3^{+2.2}_{-1.2}$
UZ For	53	396	$32 . 7_{- 4.8}^{+ 2.5}$ $32.7^{+2.5}_{-4.8}$	$0 . 0_{- 0.0}^{+ 1.7}$ $0.0^{+1.7}_{-0.0}$	0.35	$1 . 8_{- 0.6}^{+ 0.9}$ $1.8^{+0.9}_{-0.6}$	$0 . 08_{- 0.03}^{+ 0.01}$ $0.08^{+0.01}_{-0.03}$	$22_{- 9}^{+ 27}$ $22^{+27}_{-9}$
V1033 Cen	20	2967	–	$14 . 6_{- 1.5}^{+ 1.6}$ $14.6^{+1.6}_{-1.5}$	1.12	–	$2 . 7_{- 0.1}^{+ 0.1}$ $2.7^{+0.1}_{-0.1}$	–
V1043 Cen	56	532	$36 . 9_{- 5.7}^{+ 3.0}$ $36.9^{+3.0}_{-5.7}$	$0 . 3_{- 0.3}^{+ 2.0}$ $0.3^{+2.0}_{-0.3}$	0.77	$2 . 1_{- 0.64}^{+ 7.7}$ $2.1^{+7.7}_{-0.64}$	$0 . 07_{- 0.02}^{+ 0.02}$ $0.07^{+0.02}_{-0.02}$	$32_{- 15}^{+ 196}$ $32^{+196}_{-15}$
V1309 Ori	61	647	$43 . 2_{- 4.3}^{+ 4.4}$ $43.2^{+4.4}_{-4.3}$	$4 . 4_{- 1.5}^{+ 1.8}$ $4.4^{+1.8}_{-1.5}$	1.01	$5 . 4_{- 2.7}^{+ 7.4}$ $5.4^{+7.4}_{-2.7}$	$0 . 06_{0.03}^{+ 0.03}$ $0.06^{+0.03}_{0.03}$	$85_{- 56}^{+ 282}$ $85^{+282}_{-56}$
V347 Pav	–	377	–	$0 . 0_{- 0.0}^{+ 1.8}$ $0.0^{+1.8}_{-0.0}$	1.12	–	$0 . 38_{- 0.4}^{+ 0.04}$ $0.38^{+0.04}_{-0.4}$	–
V834 Cen	23	755	$33 . 6_{- 3.0}^{+ 3.0}$ $33.6^{+3.0}_{-3.0}$	$0 . 0_{- 0.0}^{+ 82}$ $0.0^{+82}_{-0.0}$	1.27	$3 . 3_{- 0.5}^{+ 5.1}$ $3.3^{+5.1}_{-0.5}$	$0 . 72_{- 0.08}^{+ 0.06}$ $0.72^{+0.06}_{-0.08}$	$4 . 6_{- 1.0}^{+ 8.6}$ $4.6^{+8.6}_{-1.0}$
VV Pup	31	494	$30 . 9_{- 4.6}^{+ 4.3}$ $30.9^{+4.3}_{-4.6}$	$0 . 0_{- 0.0}^{+ 0.8}$ $0.0^{+0.8}_{-0.0}$	0.63	$2 . 9_{- 0.5}^{+ 4.8}$ $2.9^{+4.8}_{-0.5}$	$0 . 66_{- 0.07}^{+ 0.07}$ $0.66^{+0.07}_{-0.07}$	$4 . 4_{- 1.2}^{+ 8.7}$ $4.4^{+8.7}_{-1.2}$

Notes. Here, we provide the magnetic field in the prime pole, counts in TM8, fitted blackbody temperatures and hydrogen column densities, the value of the fit statistics, and the implied bolometric fluxes for the soft blackbody and the hard plasma component. The temperature in the APEC model was fixed to 15 keV. Errors were derived for a 90% confidence interval.

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