Table 1
The multi-wavelength fluxes and flux upper limits of potential counterparts of HESS J1943+213.
| Observatory | Band | RA (J2000) | Dec (J2000) | Position | θ (9) | α = Γ − 1 | Flux | Ref. |
| [hh mm ss.s] | [°′′′] | Error 90% | [″] | [erg cm-2 s-1] | ||||
|
|
||||||||
| NVSS(1) | 1.4 GHz | 19 43 56.14 | +21 18 26.9 | 0.45″, 0.56″ | 24.7 | 0.32 ± 0.02(10) | (1.44 ± 0.05) × 10−15 (12) | a, b |
| NRT(1) | 1.4 GHz | 19 43 56 | +21 18 26 | 15″ (8) | 22.8 | 0.6 ± 0.2 | (1.55 ± 0.02) × 10−15 (12) | |
| 2MASS(2) | 2.2 μm (K) | 19 43 56.244 | +21 18 23.38 | < 0.2″ | 23.2 | – | 2.37 × 10−12 (12,13) | c |
| Swift/UVOT | 0.54 μm (V) | 19 43 56.20 | +21 18 22.95 | – | 22.5 | – | < 1.6 × 10−13 (12,13) | g |
| ROSAT/HRI(3) | 0.1–2 keV | 19 43 56.2 | +21 18 24 | 6″ | 23.2 | – (14) | (3.82 ± 0.55) × 10−11 (14) | d |
| Chandra (4) | 0.3–10 keV | 19 43 56.23 | +21 18 23.6 | 0.64″ | 23.2 | 0.83 ± 0.11 |
|
e |
| Swift/XRT(5) | 2–10 keV | 19 43 56.20 | +21 18 22.95 | 3.53″ | 22.5 | 1.04 ± 0.12 | (1.83 ± 0.04) × 10-11 | f, g |
| Swift/BAT(6) | 15–150 keV | 19 43 54.35 | +21 18 08.2 | 2.88′ | 9.1 | – (11) | (1.8 ± 0.2) × 10-11 | h |
| Swift/BAT(5) | 14–195 keV | 19 43 55.2 | +21 18 07.2 | – | 2.9 |
|
|
k |
| INTEGRAL/IBIS(7) | 20–100 keV | 19 44 09.36 | +21 18 25.2 | 4.4″ | 201 | 1.12 ± 0.22 | (1.12 ± 0.22) × 10-11 | g, i |
| INTEGRAL/SPI(7) | 100–200 keV | 19 44 23.13 | +21 16 36.4 | – | 404 | – | < 2.6 × 10-11 | j |
| Fermi/LAT | 0.1–100 GeV | 19 43 56.23 | +21 18 23.6 | – | 23.2 | 1.0 (15) | < 7 × 10-12 | |
| Fermi/LAT | 0.5 (15) | < 1 × 10-12 | ||||||
| H.E.S.S. | > 470 GeV | 19 43 55 | +21 18 8 | 34″stat, 21″sys | 0 | 2.1 ± 0.3stat ± 0.2sys |
|
|
Notes. (1) NVSS J194356+211826; (2) 2MASS J19435624+2118233; (3) 1RXH J194356.2+211824; (4) CXOU J194356.2+211823; (5) SWIFT J1943.5+2120; (6) PBC J1943.9+2118; (7) IGR J19443+2117; (8) Error for right ascension only; (9) angular distance from the centroid of H.E.S.S. source position; (10) spectral index given for all combined radio measurements between 327 and 4850 MHz, listed in SPECFIND V2.0 (Vollmer 2009); (11) Hardness ratio Rate(30–150 keV)/Rate(14–30 keV) = 1.0 ± 0.4; (12) EF(E); (13) the flux is not corrected for extinction; (14) unabsorbed flux obtained from ROSAT/HRI count-rate using a Mission Count Rate Simulator PIMMS, assuming NH and αX identical with Chandra. The flux error includes uncertainties of NH and αX; (15) the spectral index was assumed for upper limit calculation.
References. (a) Condon et al. (1998); (b) Vollmer (2009); (c) Skrutskie et al. (2006); (d) ROSAT Scientific Team (2000); (e) Tomsick et al. (2009); (f) Malizia et al. (2007); (g) Landi et al. (2009); (h) Cusumano et al. (2010); (i) Bird et al. (2010); (j) Bouchet et al. (2008); (k) Baumgartner et al. (2011).
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