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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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