Table 3.
Open in new tab

Optical and X-ray properties of the studied sources.

X-rayOpticalOptical CounterpartX-ray SourceClassification
source IDsource IDRADec.OffsetVB–VIDRADec.LX, unabsThis workPrevious
(J2000)CXOU = C, XMMU = X(J2000)
(h m s)(° ′ ′′)(′′)(mag)(mag)(h m s)(° ′ ′′)(1033 erg s−1)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)
CH4-8O_4_17126400 48 14.13−73 10 03.50.6315.74 ± 0.040.00 ± 0.05C J004814.15−731004.100 48 14.15−73 10 04.130.4B1.5B1.5 [A09]
CH7-1O_5_6551700 49 03.34−72 50 52.10.4516.94 ± 0.060.09 ± 0.10C J004903.37−725052.500 49 03.37−72 50 52.579.2B1–B5∼B3 [M08]
CH4-2O_5_11149000 49 13.63−73 11 37.40.4716.52 ± 0.020.10 ± 0.04C J004913.57−731137.800 49 13.57−73 11 37.876.6B3–B5B1.5 [A09]
CH4-5O_5_11150000 49 29.81−73 10 58.00.6116.30 ± 0.010.09 ± 0.02C J004929.74−731058.500 49 29.74−73 10 58.537.6B1–B5B1 [A09]
CH7-19O_5_14676600 49 41.66−72 48 42.91.3617.16 ± 0.550.27 ± 0.60C J004941.43−724843.800 49 41.43−72 48 43.83.7B1–B5aunclassified
CH4-3O_5_27107400 50 57.12−73 10 07.70.2814.54 ± 0.01−0.06 ± 0.01C J005057.16−731007.900 50 57.16−73 10 07.990.4B1–B5B0.5 [A09]
CH5-3O_6_8561400 51 53.11−72 31 48.30.5414.90 ± 0.12−0.27 ± 0.13C J005153.16−723148.800 51 53.16−72 31 48.857.1B0.5O9.5–B0 [M08]
CH5-1Z_231149600 52 05.69−72 26 04.00.5514.91 ± 0.020.00 ± 0.03C J005205.61−722604.400 52 05.61−72 26 04.41093.9B3–B5B1–1.5 [M08]
CH6-1O_6_7722800 52 08.95−72 38 02.90.5815.03 ± 0.020.14 ± 0.03C J005208.95−723803.500 52 08.95−72 38 03.52342.0B1–B5B1–3 [A09]
CH5-12Z_240601400 52 45.10−72 28 43.40.3514.92 ± 0.080.00 ± 0.09C J005245.04−722843.600 52 45.04−72 28 43.67.2B0O9–B0 [A09]
XMM2-1Z_243006600 52 55.27−71 58 06.02.8215.53 ± 0.02−0.05 ± 0.04X J005255.1−71580900 52 55.10−71 58 08.7893.2B1–B3B0–B1 [M08]
CH5-16Z_257335400 53 55.38−72 26 45.30.8314.72 ± 0.03−0.07 ± 0.03C J005355.25−722645.800 53 55.25−72 26 45.84.4B0B0.5 [A09]
CH6-20O_6_31116900 54 09.53−72 41 42.90.6213.71 ± 0.140.39 ± 0.19C J005409.57−724143.500 54 09.57−72 41 43.53.5sgB0[e]sgB0[e] [Z89]
CH6-2O_7_4710300 54 55.87−72 45 10.70.4015.01 ± 0.01−0.02 ± 0.01C J005455.78−724510.700 54 55.78−72 45 10.7223.4B1.5–B3B1–1.5 [A09]
CH5-7O_7_7082900 54 56.17−72 26 47.61.1915.30 ± 0.01−0.04 ± 0.02C J005456.34−722648.400 54 56.34−72 26 48.423.2B0.5B0 [A09]
CH5-6Z_274803300 55 03.63−72 22 31.23.6017.86 ± 0.03−0.03 ± 0.05C J005504.40−722230.400 55 04.40−72 22 30.438.3B1–B5unclassified
CH3-18Z_289343900 56 05.56−72 21 59.00.7215.88 ± 0.03−0.04 ± 0.03C J005605.42−722159.300 56 05.42−72 21 59.33.1B2B1 [M08]
CH3-7Z_307596700 57 24.02−72 23 56.41.3014.71 ± 0.03−0.07 ± 0.03C J005723.77−722357.000 57 23.77−72 23 57.014.9B2unclassified
CH3-3O_8_4953100 57 36.01−72 19 33.80.1416.01 ± 0.02−0.02 ± 0.04C J005736.00−721933.900 57 36.00−72 19 33.953.7B1–B5B0–4 [A09]
XMM1-2Z_411959901 05 20.72−72 49 41.54.0116.98 ± 0.03−0.09 ± 0.04X J010519.9−72494301 05 19.90−72 49 43.114.6B3–B5unclassified
XMM1-3Z_423247601 06 21.02−72 40 48.84.5316.38 ± 0.030.02 ± 0.03X J010620.0−72404901 06 20.01−72 40 49.135.9B9unclassified
X-rayOpticalOptical CounterpartX-ray SourceClassification
source IDsource IDRADec.OffsetVB–VIDRADec.LX, unabsThis workPrevious
(J2000)CXOU = C, XMMU = X(J2000)
(h m s)(° ′ ′′)(′′)(mag)(mag)(h m s)(° ′ ′′)(1033 erg s−1)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)
CH4-8O_4_17126400 48 14.13−73 10 03.50.6315.74 ± 0.040.00 ± 0.05C J004814.15−731004.100 48 14.15−73 10 04.130.4B1.5B1.5 [A09]
CH7-1O_5_6551700 49 03.34−72 50 52.10.4516.94 ± 0.060.09 ± 0.10C J004903.37−725052.500 49 03.37−72 50 52.579.2B1–B5∼B3 [M08]
CH4-2O_5_11149000 49 13.63−73 11 37.40.4716.52 ± 0.020.10 ± 0.04C J004913.57−731137.800 49 13.57−73 11 37.876.6B3–B5B1.5 [A09]
CH4-5O_5_11150000 49 29.81−73 10 58.00.6116.30 ± 0.010.09 ± 0.02C J004929.74−731058.500 49 29.74−73 10 58.537.6B1–B5B1 [A09]
CH7-19O_5_14676600 49 41.66−72 48 42.91.3617.16 ± 0.550.27 ± 0.60C J004941.43−724843.800 49 41.43−72 48 43.83.7B1–B5aunclassified
CH4-3O_5_27107400 50 57.12−73 10 07.70.2814.54 ± 0.01−0.06 ± 0.01C J005057.16−731007.900 50 57.16−73 10 07.990.4B1–B5B0.5 [A09]
CH5-3O_6_8561400 51 53.11−72 31 48.30.5414.90 ± 0.12−0.27 ± 0.13C J005153.16−723148.800 51 53.16−72 31 48.857.1B0.5O9.5–B0 [M08]
CH5-1Z_231149600 52 05.69−72 26 04.00.5514.91 ± 0.020.00 ± 0.03C J005205.61−722604.400 52 05.61−72 26 04.41093.9B3–B5B1–1.5 [M08]
CH6-1O_6_7722800 52 08.95−72 38 02.90.5815.03 ± 0.020.14 ± 0.03C J005208.95−723803.500 52 08.95−72 38 03.52342.0B1–B5B1–3 [A09]
CH5-12Z_240601400 52 45.10−72 28 43.40.3514.92 ± 0.080.00 ± 0.09C J005245.04−722843.600 52 45.04−72 28 43.67.2B0O9–B0 [A09]
XMM2-1Z_243006600 52 55.27−71 58 06.02.8215.53 ± 0.02−0.05 ± 0.04X J005255.1−71580900 52 55.10−71 58 08.7893.2B1–B3B0–B1 [M08]
CH5-16Z_257335400 53 55.38−72 26 45.30.8314.72 ± 0.03−0.07 ± 0.03C J005355.25−722645.800 53 55.25−72 26 45.84.4B0B0.5 [A09]
CH6-20O_6_31116900 54 09.53−72 41 42.90.6213.71 ± 0.140.39 ± 0.19C J005409.57−724143.500 54 09.57−72 41 43.53.5sgB0[e]sgB0[e] [Z89]
CH6-2O_7_4710300 54 55.87−72 45 10.70.4015.01 ± 0.01−0.02 ± 0.01C J005455.78−724510.700 54 55.78−72 45 10.7223.4B1.5–B3B1–1.5 [A09]
CH5-7O_7_7082900 54 56.17−72 26 47.61.1915.30 ± 0.01−0.04 ± 0.02C J005456.34−722648.400 54 56.34−72 26 48.423.2B0.5B0 [A09]
CH5-6Z_274803300 55 03.63−72 22 31.23.6017.86 ± 0.03−0.03 ± 0.05C J005504.40−722230.400 55 04.40−72 22 30.438.3B1–B5unclassified
CH3-18Z_289343900 56 05.56−72 21 59.00.7215.88 ± 0.03−0.04 ± 0.03C J005605.42−722159.300 56 05.42−72 21 59.33.1B2B1 [M08]
CH3-7Z_307596700 57 24.02−72 23 56.41.3014.71 ± 0.03−0.07 ± 0.03C J005723.77−722357.000 57 23.77−72 23 57.014.9B2unclassified
CH3-3O_8_4953100 57 36.01−72 19 33.80.1416.01 ± 0.02−0.02 ± 0.04C J005736.00−721933.900 57 36.00−72 19 33.953.7B1–B5B0–4 [A09]
XMM1-2Z_411959901 05 20.72−72 49 41.54.0116.98 ± 0.03−0.09 ± 0.04X J010519.9−72494301 05 19.90−72 49 43.114.6B3–B5unclassified
XMM1-3Z_423247601 06 21.02−72 40 48.84.5316.38 ± 0.030.02 ± 0.03X J010620.0−72404901 06 20.01−72 40 49.135.9B9unclassified

(1) Source ID – the name convention is CH/XMM F-NN, where CH stands for Chandra and XMM for XMM–Newton sources, F is the field number and NN is the source ID for this field (from Antoniou et al. 2009a and Antoniou et al. 2010, respectively).

(2) Optical counterpart ID given as O_F_NNNNNN from the OGLE-II catalogue (Udalski et al. 1998), where F is the field number and NNNNNN is the optical source ID respectively, and Z_NNNNNN from the MCPS catalogue (Zaritsky et al. 2002), where NNNNNN is the line number of the source in their table 1.

(3, 4) Right ascension and Declination (J2000) of the optical counterpart.

(5) Distance (in arcseconds) of the optical counterpart from the X-ray source.

(6, 7) Apparent V magnitude and B−V colour index, along with their errors, taken directly from the original catalogues without applying any reddening or zero-point correction.

(8) X-ray source names, Chandra sources (CXOU) labelled as C and XMM–Newton sources (XMMU) as X, followed by the designation.

(9,10) Right ascension and Declination (J2000) of the X-ray source.

(11) Unabsorbed X-ray luminosity in the 0.5–7.0 keV band (assuming a power law with photon index Γ = 1.7 and NH = 6 × 1020 cm−2, and 60 kpc distance; Hilditch et al. 2005) for Chandra sources (Zezas, in preparation; Antoniou et al. 2009a) and XMM–Newton sources (Antoniou et al. 2010).

(12) Spectral-type classification from this work.

(13) Classification published in other works: [A09]: Antoniou et al. (2009b); [M08]: McBride et al. (2008); [Z89]: Zickgraf et al. (1989).

aThe classification of source CH7-19 is tentative as its |$\langle \mathrm{FWHM}_{\rm {H}_\alpha }\rangle$| is marginally lower than the limit set for BeXRBs.

Table 3.
Open in new tab

Optical and X-ray properties of the studied sources.

X-rayOpticalOptical CounterpartX-ray SourceClassification
source IDsource IDRADec.OffsetVB–VIDRADec.LX, unabsThis workPrevious
(J2000)CXOU = C, XMMU = X(J2000)
(h m s)(° ′ ′′)(′′)(mag)(mag)(h m s)(° ′ ′′)(1033 erg s−1)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)
CH4-8O_4_17126400 48 14.13−73 10 03.50.6315.74 ± 0.040.00 ± 0.05C J004814.15−731004.100 48 14.15−73 10 04.130.4B1.5B1.5 [A09]
CH7-1O_5_6551700 49 03.34−72 50 52.10.4516.94 ± 0.060.09 ± 0.10C J004903.37−725052.500 49 03.37−72 50 52.579.2B1–B5∼B3 [M08]
CH4-2O_5_11149000 49 13.63−73 11 37.40.4716.52 ± 0.020.10 ± 0.04C J004913.57−731137.800 49 13.57−73 11 37.876.6B3–B5B1.5 [A09]
CH4-5O_5_11150000 49 29.81−73 10 58.00.6116.30 ± 0.010.09 ± 0.02C J004929.74−731058.500 49 29.74−73 10 58.537.6B1–B5B1 [A09]
CH7-19O_5_14676600 49 41.66−72 48 42.91.3617.16 ± 0.550.27 ± 0.60C J004941.43−724843.800 49 41.43−72 48 43.83.7B1–B5aunclassified
CH4-3O_5_27107400 50 57.12−73 10 07.70.2814.54 ± 0.01−0.06 ± 0.01C J005057.16−731007.900 50 57.16−73 10 07.990.4B1–B5B0.5 [A09]
CH5-3O_6_8561400 51 53.11−72 31 48.30.5414.90 ± 0.12−0.27 ± 0.13C J005153.16−723148.800 51 53.16−72 31 48.857.1B0.5O9.5–B0 [M08]
CH5-1Z_231149600 52 05.69−72 26 04.00.5514.91 ± 0.020.00 ± 0.03C J005205.61−722604.400 52 05.61−72 26 04.41093.9B3–B5B1–1.5 [M08]
CH6-1O_6_7722800 52 08.95−72 38 02.90.5815.03 ± 0.020.14 ± 0.03C J005208.95−723803.500 52 08.95−72 38 03.52342.0B1–B5B1–3 [A09]
CH5-12Z_240601400 52 45.10−72 28 43.40.3514.92 ± 0.080.00 ± 0.09C J005245.04−722843.600 52 45.04−72 28 43.67.2B0O9–B0 [A09]
XMM2-1Z_243006600 52 55.27−71 58 06.02.8215.53 ± 0.02−0.05 ± 0.04X J005255.1−71580900 52 55.10−71 58 08.7893.2B1–B3B0–B1 [M08]
CH5-16Z_257335400 53 55.38−72 26 45.30.8314.72 ± 0.03−0.07 ± 0.03C J005355.25−722645.800 53 55.25−72 26 45.84.4B0B0.5 [A09]
CH6-20O_6_31116900 54 09.53−72 41 42.90.6213.71 ± 0.140.39 ± 0.19C J005409.57−724143.500 54 09.57−72 41 43.53.5sgB0[e]sgB0[e] [Z89]
CH6-2O_7_4710300 54 55.87−72 45 10.70.4015.01 ± 0.01−0.02 ± 0.01C J005455.78−724510.700 54 55.78−72 45 10.7223.4B1.5–B3B1–1.5 [A09]
CH5-7O_7_7082900 54 56.17−72 26 47.61.1915.30 ± 0.01−0.04 ± 0.02C J005456.34−722648.400 54 56.34−72 26 48.423.2B0.5B0 [A09]
CH5-6Z_274803300 55 03.63−72 22 31.23.6017.86 ± 0.03−0.03 ± 0.05C J005504.40−722230.400 55 04.40−72 22 30.438.3B1–B5unclassified
CH3-18Z_289343900 56 05.56−72 21 59.00.7215.88 ± 0.03−0.04 ± 0.03C J005605.42−722159.300 56 05.42−72 21 59.33.1B2B1 [M08]
CH3-7Z_307596700 57 24.02−72 23 56.41.3014.71 ± 0.03−0.07 ± 0.03C J005723.77−722357.000 57 23.77−72 23 57.014.9B2unclassified
CH3-3O_8_4953100 57 36.01−72 19 33.80.1416.01 ± 0.02−0.02 ± 0.04C J005736.00−721933.900 57 36.00−72 19 33.953.7B1–B5B0–4 [A09]
XMM1-2Z_411959901 05 20.72−72 49 41.54.0116.98 ± 0.03−0.09 ± 0.04X J010519.9−72494301 05 19.90−72 49 43.114.6B3–B5unclassified
XMM1-3Z_423247601 06 21.02−72 40 48.84.5316.38 ± 0.030.02 ± 0.03X J010620.0−72404901 06 20.01−72 40 49.135.9B9unclassified
X-rayOpticalOptical CounterpartX-ray SourceClassification
source IDsource IDRADec.OffsetVB–VIDRADec.LX, unabsThis workPrevious
(J2000)CXOU = C, XMMU = X(J2000)
(h m s)(° ′ ′′)(′′)(mag)(mag)(h m s)(° ′ ′′)(1033 erg s−1)
(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)
CH4-8O_4_17126400 48 14.13−73 10 03.50.6315.74 ± 0.040.00 ± 0.05C J004814.15−731004.100 48 14.15−73 10 04.130.4B1.5B1.5 [A09]
CH7-1O_5_6551700 49 03.34−72 50 52.10.4516.94 ± 0.060.09 ± 0.10C J004903.37−725052.500 49 03.37−72 50 52.579.2B1–B5∼B3 [M08]
CH4-2O_5_11149000 49 13.63−73 11 37.40.4716.52 ± 0.020.10 ± 0.04C J004913.57−731137.800 49 13.57−73 11 37.876.6B3–B5B1.5 [A09]
CH4-5O_5_11150000 49 29.81−73 10 58.00.6116.30 ± 0.010.09 ± 0.02C J004929.74−731058.500 49 29.74−73 10 58.537.6B1–B5B1 [A09]
CH7-19O_5_14676600 49 41.66−72 48 42.91.3617.16 ± 0.550.27 ± 0.60C J004941.43−724843.800 49 41.43−72 48 43.83.7B1–B5aunclassified
CH4-3O_5_27107400 50 57.12−73 10 07.70.2814.54 ± 0.01−0.06 ± 0.01C J005057.16−731007.900 50 57.16−73 10 07.990.4B1–B5B0.5 [A09]
CH5-3O_6_8561400 51 53.11−72 31 48.30.5414.90 ± 0.12−0.27 ± 0.13C J005153.16−723148.800 51 53.16−72 31 48.857.1B0.5O9.5–B0 [M08]
CH5-1Z_231149600 52 05.69−72 26 04.00.5514.91 ± 0.020.00 ± 0.03C J005205.61−722604.400 52 05.61−72 26 04.41093.9B3–B5B1–1.5 [M08]
CH6-1O_6_7722800 52 08.95−72 38 02.90.5815.03 ± 0.020.14 ± 0.03C J005208.95−723803.500 52 08.95−72 38 03.52342.0B1–B5B1–3 [A09]
CH5-12Z_240601400 52 45.10−72 28 43.40.3514.92 ± 0.080.00 ± 0.09C J005245.04−722843.600 52 45.04−72 28 43.67.2B0O9–B0 [A09]
XMM2-1Z_243006600 52 55.27−71 58 06.02.8215.53 ± 0.02−0.05 ± 0.04X J005255.1−71580900 52 55.10−71 58 08.7893.2B1–B3B0–B1 [M08]
CH5-16Z_257335400 53 55.38−72 26 45.30.8314.72 ± 0.03−0.07 ± 0.03C J005355.25−722645.800 53 55.25−72 26 45.84.4B0B0.5 [A09]
CH6-20O_6_31116900 54 09.53−72 41 42.90.6213.71 ± 0.140.39 ± 0.19C J005409.57−724143.500 54 09.57−72 41 43.53.5sgB0[e]sgB0[e] [Z89]
CH6-2O_7_4710300 54 55.87−72 45 10.70.4015.01 ± 0.01−0.02 ± 0.01C J005455.78−724510.700 54 55.78−72 45 10.7223.4B1.5–B3B1–1.5 [A09]
CH5-7O_7_7082900 54 56.17−72 26 47.61.1915.30 ± 0.01−0.04 ± 0.02C J005456.34−722648.400 54 56.34−72 26 48.423.2B0.5B0 [A09]
CH5-6Z_274803300 55 03.63−72 22 31.23.6017.86 ± 0.03−0.03 ± 0.05C J005504.40−722230.400 55 04.40−72 22 30.438.3B1–B5unclassified
CH3-18Z_289343900 56 05.56−72 21 59.00.7215.88 ± 0.03−0.04 ± 0.03C J005605.42−722159.300 56 05.42−72 21 59.33.1B2B1 [M08]
CH3-7Z_307596700 57 24.02−72 23 56.41.3014.71 ± 0.03−0.07 ± 0.03C J005723.77−722357.000 57 23.77−72 23 57.014.9B2unclassified
CH3-3O_8_4953100 57 36.01−72 19 33.80.1416.01 ± 0.02−0.02 ± 0.04C J005736.00−721933.900 57 36.00−72 19 33.953.7B1–B5B0–4 [A09]
XMM1-2Z_411959901 05 20.72−72 49 41.54.0116.98 ± 0.03−0.09 ± 0.04X J010519.9−72494301 05 19.90−72 49 43.114.6B3–B5unclassified
XMM1-3Z_423247601 06 21.02−72 40 48.84.5316.38 ± 0.030.02 ± 0.03X J010620.0−72404901 06 20.01−72 40 49.135.9B9unclassified

(1) Source ID – the name convention is CH/XMM F-NN, where CH stands for Chandra and XMM for XMM–Newton sources, F is the field number and NN is the source ID for this field (from Antoniou et al. 2009a and Antoniou et al. 2010, respectively).

(2) Optical counterpart ID given as O_F_NNNNNN from the OGLE-II catalogue (Udalski et al. 1998), where F is the field number and NNNNNN is the optical source ID respectively, and Z_NNNNNN from the MCPS catalogue (Zaritsky et al. 2002), where NNNNNN is the line number of the source in their table 1.

(3, 4) Right ascension and Declination (J2000) of the optical counterpart.

(5) Distance (in arcseconds) of the optical counterpart from the X-ray source.

(6, 7) Apparent V magnitude and B−V colour index, along with their errors, taken directly from the original catalogues without applying any reddening or zero-point correction.

(8) X-ray source names, Chandra sources (CXOU) labelled as C and XMM–Newton sources (XMMU) as X, followed by the designation.

(9,10) Right ascension and Declination (J2000) of the X-ray source.

(11) Unabsorbed X-ray luminosity in the 0.5–7.0 keV band (assuming a power law with photon index Γ = 1.7 and NH = 6 × 1020 cm−2, and 60 kpc distance; Hilditch et al. 2005) for Chandra sources (Zezas, in preparation; Antoniou et al. 2009a) and XMM–Newton sources (Antoniou et al. 2010).

(12) Spectral-type classification from this work.

(13) Classification published in other works: [A09]: Antoniou et al. (2009b); [M08]: McBride et al. (2008); [Z89]: Zickgraf et al. (1989).

aThe classification of source CH7-19 is tentative as its |$\langle \mathrm{FWHM}_{\rm {H}_\alpha }\rangle$| is marginally lower than the limit set for BeXRBs.

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