Table C.1
Multi-wavelength properties of non-UCDs considered to be more plausible counterparts to eRASS 1 sources than the UCD in its vicinity.
| Gaia DR2 designation of UCD | Gaia DR2 designation of alternative counterpart | G (mag) | J (mag) | W1 (mag) | SpType | Dist (pc) | fx,bond 2 (erg cm−2 s−1) | fx, band 3 (erg cm−2 s−1) | Object type | Ref. |
|---|---|---|---|---|---|---|---|---|---|---|
| bright Gaia source but not closest to X-ray source | ||||||||||
| 4842003953209804672 | 4842003953209804928 | 14.63 | 13.64 | 12.78 | G1−G2V |  |
(27.78 ± 10.79) × 10−15 | … | Star | 4 |
| 652944911438186368 | 652944915732919168 | 16.92 | 15.25 | 14.28 | K4−K4.5V |  |
(47.52 ± 27.08) × 10−15 | (36.46 ± 33.49) × 10−14 | Star | 2,10 |
| 720165105283287808 | 720165105284271744 | 13.02 | 11.05 | 10.21 | K7−K8V |  |
(109.63 ± 42.96) × 10−15 | … | Star | 2,10 |
| 5411645461381996928 | 5411645465686894208 | 13.76 | 12.10 | 11.48 | K4−K4.5V |  |
(84.62 ± 25.74) × 10−15 | … | Star | 4 |
| 5449824525188538112 | 5449824490828691584 | 18.77 | 16.41 | 15.06 | M1V |  |
… | (62.07 ± 30.40) × 10−14 | Star | 4 |
| 5854998824943562240 | 5854998820633388544 | 19.75 | … | … | … |  |
(26.81 ± 8.66) × 10−15 | (2.08 ± 4.96) × 10−14 | Star | 4 |
| 5854998824943562240 | 5854998824943561728 | 15.96 | 13.25 | 11.73 | M3−M3.5V |  |
(26.81 ± 8.66) × 10−15 | (2.08 ± 4.96) × 10−14 | Galaxy | 4 |
| 5905136482143969280 | 5905136486450575616 | 13.80 | 12.49 | 11.52 | K1−K1.5V |  |
(43.00 ± 20.74) × 10−15 | (28.82 ± 22.38) × 10−14 | Star | 4 |
| non-UCD Gaia source closest to X-ray source | ||||||||||
| 5985290231327158144 | 5985290231264640000 | 20.29 | … | … | … |  |
(34.85 ± 16.38) × 10−15 | … | … | … |
| 6235533167875990272 | 6235533163576299520 | 18.14 | 16.14 | K7−K8V |  |
(64.78 ± 25.84) × 10−15 | (14.81 ± 18.61) × 10−14 | Galaxy | 4 | |
| 3426062907707797376 | 3426062912004133632 | 15.74 | 12.69 | 11.72 | M4V | … | (63.15 ± 30.31) × 10−15 | … | Star | 6,10 |
| 3537678013829356032 | 3537678009534395520 | 20.81 | … | 15.99 | … |  |
(47.71 ± 17.37) × 10−15 | (6.4 ± 7.67) × 10−14 | Galaxy | 4 |
| 3902395843353397248 | 3902395813288871936w | 19.17 | … | 14.10 | … |  |
(119.02 ± 34.17) × 10−15 | (11.00 ± 12.02) × 10−14 | QSO | 1 |
| 4633181951787913344 | 4633181956082468736 | 20.86 | … | 14.87 | … | … | (32.75 ± 13.85) × 10−15 | … | AGN | 5,8 |
| 4682521921904033408 | 4682521921904033024 | 19.69 | … | 14.67 | … |  |
(29.13 ± 8.86) × 10−15 | … | AGN | 5,8 |
| 4820214342870659968 | 4820214347166884096 | 17.05 | 15.98 | 14.89 | G4−G5V |  |
(29.31 ± 11.73) × 10−15 | … | Star | 4 |
| 4907225329405739904 | 4907225329405740672 | 19.79 | … | … | … |  |
(28.66 ± 14.92) × 10−15 | … | Star | 4 |
| 4948028068473626368 | 4948028068473523200 | 20.71 | … | 16.02 | … | … | (29.12 ± 13.13) × 10−15 | … | Galaxy | 4 |
| 5263797568772960256 | 5263797641784398080 | 21.08 | … | … | … | … | (9.46 ± 3.73) × 10−15 | (2.74 ± 2.68) × 10−14 | Galaxy | 4 |
| 5317092619649544960 | 5317092550945911552(†) | 10.86 | 10.06 | 9.50 | F6−F7V |  |
(28.11 ± 14.56) × 10−15 | (3.85 ± 13.49) × 10−14 | Star | 7,9 |
| 5387954181261184896 | 5387953979397582336 | 20.92 | … | 15.47 | … | … | (46.72 ± 18.39) × 10−15 | … | AGN | 5,8 |
| 5479448529535828992 | 5479448529538083200 | 20.58 | … | 14.59 | … |  |
(16.46 ± 6.95) × 10−15 | (3.76 ± 4.51) × 10−14 | AGN | 5,8 |
| 5790470927042226816 | 5790470927034553984 | 19.83 | … | … | … |  |
(8.32 ± 6.27) × 10−15 | … | … | … |
| 5800676697044928640 | 5800676697044928000 | 12.58 | 10.47 | 9.84 | K9−M0V |  |
(14.92 ± 10.04) × 10−15 | (6.54 ± 8.89) × 10−14 | VB | 11 |
| 5800676697044928640 | 5800676697042535296 | 12.71 | 10.47 | 9.84 | M0−M0.5V |  |
(14.92 ± 10.04) × 10−15 | (6.54 ± 8.89) × 10−14 | VB | 11 |
| 5878773221280041472 | 5878773216960788096 | 12.14 | 10.92 | 10.39 | G9−K0V |  |
(72.80 ± 26.28) × 10−15 | … | Star | 3 |
| 5991061121183402880 | 5991061121134832896 | 20.41 | … | … | … |  |
(96.52 ± 28.33) × 10−15 | … | … | … |
Notes. Other name from SIMBAD: (*)2XMM J123337.5+073133, (†)TYC 8573-3247-1.
References. (1) Schneider et al. (2007), (2) Vasconcellos et al. (2011), (3) Saito et al. (2012), (4) McMahon et al. (2013), (5) Secrest et al. (2015), (6) Cook et al. (2016), (7) Stevens et al. (2017), (8) Assef et al. (2018), (9) Cantat-Gaudin et al. (2018), (10) Xiang et al. (2019), (11) this work.
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