Table 1
Target fields and source classification.
# | Field | l [°] | b [°] | NH† | Observation | Epic pn | Ntot | Active | HMXB | Pre-MS | EG | unID |
[cm-2] | ID | exp [ks] | coronae | |||||||||
|
||||||||||||
Optically bright sample, Rlim ~ 17 | ||||||||||||
1 | Ridge 1 | 33.1 | +0.0 | 1.4 × 1023 | 0017740401 | 26 | 4 | 1 (25%) | 0 | 0 | 0 | 3 |
2 | RX J0002+6246 | 117.0 | +0.5 | 4.2 × 1021 | 0016140101 | [17] | 40 | 7 (18%) | 1 | 0 | 0 | 32 |
3 | LHB-3 | 111.1 | +1.1 | 1.3 × 1022 | 0203130201 | 19 | 42 | 13 (31%) | 0 | 0 | 0 | 29 |
4 | GRB 010220 | 135.1 | +1.4 | 4.8 × 1021 | 0128530401 | 9 | 23 | 12 (52%) | 0 | 0 | 0 | 11 |
5 | Saturn | 187.0 | –1.6 | 6.2 × 1021 | 0089370501 | 21 | 44 | 6 (14%) | 0 | 0 | 0 | 38 |
6 | RX J0925.7-4758 | 271.4 | +1.9 | 1.4 × 1022 | 0111150201 | 57 | 42 | 9 (21%) | 0 | 0 | 0 | 33 |
7 | Ridge 2 | 33.0 | +2.0 | 1.5 × 1022 | 0017740601 | 20 | 39 | 12 (31%) | 0 | 1 | 0 | 26 |
8 | HTCas | 125.2 | –2.7 | 3.9 × 1021 | 0111310101 | 18 | 34 | 6 (18%) | 0 | 0 | 0 | 28 |
9 | PSR J0117+5914 | 126.3 | –3.4 | 3.4 × 1021 | 0112200201 | 6 | 27 | 4 (14%) | 1 | 0 | 0 | 22 |
10 | Geminga | 195.1 | +4.3 | 3.0 × 1021 | 0111170101 | [86] | 88 | 9 (10%) | 0 | 0 | 0 | 79 |
11 | SS Cyg | 90.7 | –7.1 | 2.5 × 1021 | 0111310201 | [12] | 13 | 5 (38%) | 0 | 0 | 2 | 6 |
12 | ARLac | 95.6 | –8.3 | 1.9 × 1021 | 0111370101 | [20] | 24 | 5 (22%) | 0 | 0 | 0 | 20 |
13 | PSR0656+14 | 201.1 | +8.3 | 5.0 × 1020 | 0112200101 | [21] | 36 | 6 (17%) | 0 | 0 | 0 | 30 |
14 | PSR J2043+2740 | 70.6 | –9.2 | 1.4 × 1021 | 0037990101 | [17] | 54 | 10(19%) | 0 | 0 | 1 | 43 |
15 | AX J2019+112 | 53.6 | –13.5 | 1.2 × 1021 | 0112960301 | 12 | 69 | 6 (9%) | 0 | 0 | 1 | 62 |
16 | 3C449 | 95.4 | –15.9 | 8.9 × 1020 | 0002970101 | 18 | 52 | 9 (17%) | 0 | 1 | 3 | 39 |
17 | 3C436 | 80.2 | –18.8 | 5.0 × 1020 | 0201230101 | 29 | 65 | 5 (8%) | 0 | 0 | 1 | 59 |
|
||||||||||||
All | 696 | 125 | 2 | 2 | 8 | 560 | ||||||
17.9% | 0.3% | 0.3% | 1.1% | 80.3% | ||||||||
|
||||||||||||
Optically faint sample, Rlim ~ 21 | ||||||||||||
18 | GC2 | 0.9 | +0.0 | 4.0 × 1023 | 0112970201 | 13 | 38 | 15 (39%) | 0 | 0 | 0 | 23 |
19 | Ridge 3 | 20.0 | +0.0 | 1.1 × 1023 | 0104460301 | 8 | 22 | 11 (54%) | 0 | 1 | 0 | 10 |
20 | Ridge 4 | 20.4 | +0.0 | 1.1 × 1023 | 0104460401 | 5 | 12 | 2 (17%) | 0 | 0 | 0 | 10 |
21 | WR110 | 10.8 | +0.4 | 5.5 × 1022 | 0024940201 | 23 | 52 | 21 (40%) | 1 | 1 | 0 | 28 |
22 | G21.5-09 offset 2 | 21.5 | –0.9 | 5.0 × 1022 | 0122700301 | 25 | 24 | 5 (22%) | 0 | 0 | 0 | 19 |
23 | PKS 0745-19-offset | 236.4 | +3.3 | 2.3 × 1021 | 0105870201 | 36 | 88 | 24 (27%) | 0 | 0 | 18 | 46 |
24 | GRO J1655-40 | 345.0 | +2.4 | 6.1 × 1021 | 0112460201 | 21 | 59 | 15 (25%) | 0 | 0 | 1 | 43 |
25 | Z And | 109.0 | –12.1 | 8.9 × 1020 | 0093552701 | 17 | 48 | 13 (27%) | 0 | 0 | 0 | 35 |
26 | GRB 001025 | 237.4 | +16.3 | 3.3 × 1020 | 0128530301 | 26 | 87 | 4 (5%) | 0 | 0 | 6 | 77 |
|
||||||||||||
All | 430 | 110 | 1 | 2 | 25 | 291 | ||||||
25.8% | 0.2% | 0.4% | 5.8% | 67.7% | ||||||||
|
||||||||||||
Total | 1126 | 235 | 3 | 4 | 33 | 851 |
Notes. Field, Galactic coordinates, observation ID, EPIC-pn exposure time (EPIC-MOS exposure time in brackets), total number of 2XMMi-DR3 sources detected, number of identified active coronae (AC), High-mass X-ray binaries (HMXB), pre-main sequence stars (pre-MS), extragalactic sources (EG), and unidentified sources (unID). We restricted to sources with .
Calculated hydrogen column density. We used the Schlegel et al. (1998) maps to estimate the colour excess E(B − V) at each Galactic position. We transformed into optical extinction AV using the relation from Savage & Mathis (1979), and we used the empirical relation from Predehl & Schmitt (1995) to calculate NH. We note that for very low Galactic latitudes (|b| < 5°) values could be wrong, but we use the values for orientative purposes.
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