Table 1.
Swift/XRT detections within the 3σFermi error boxes of UGS1.
| 4FGL Name (1) | γ-ray detection (2) | Swift exposure (3) | Swift/XRT source (4) | RA (5) | Dec (6) | Positional error (7) | X-ray detection (8) |
|---|---|---|---|---|---|---|---|
| (σ) | (ks) | (J2000) | (J2000) | (arcsec) | (σ) | ||
| 4FGL J0003.6+3059 | 13.1 | 4.9 | XRT J000402.65+310219.8 | 1.0111 | 31.0388 | 4.6 | 3.7 |
| 4FGL J0004.4−4001 | 11.0 | 9.4 | XRT J000434.22−400034.7 | 1.1426 | −40.0096 | 2.9 | 7.7 |
| 4FGL J0006.6+4618 | 6.0 | 4.5 | XRT J000652.09+461813.9 | 1.7170 | 46.3039 | 6.4 | 3.5 |
| 4FGL J0009.1−5012 | 9.7 | 4.8 | XRT J000908.61−501000.9 | 2.2859 | −50.1669 | 6.2 | 3.9 |
| 4FGL J0022.0−5921 | 12.4 | 4.6 | XRT J002127.45−591946.3 | 5.3644 | −59.3295 | 6.0 | 4.1 |
| 4FGL J0023.2+8412 | 3.4 | 1.8 | XRT J002403.36+841352.6 | 6.0140 | 84.2313 | 8.0 | 3.4 |
| 4FGL J0023.6−4209 | 4.4 | 3.4 | XRT J002303.59−420509.6 | 5.7650 | −42.0860 | 2.9 | 5.0 |
| 4FGL J0025.4−4838 | 7.4 | 4.4 | XRT J002536.94−483810.9 | 6.4039 | −48.6364 | 3.0 | 5.6 |
| 4FGL J0026.1−0732 | 9.7 | 6.6 | XRT J002611.55−073116.0 | 6.5481 | −7.5211 | 2.4 | 22.6 |
| 4FGL J0027.0−1134 | 4.4 | 1.9 | XRT J002710.11−113638.7 | 6.7921 | −11.6108 | 3.2 | 5.1 |
Notes. (1) 4FGL Name. (2) γ-ray detection significance as reported in the 4FGL catalogue. (3) Swift/XRT exposure time. (4) Name of the Swift/XRT source. (5) and (6) Coordinates of the X-ray source. (7) X-ray positional error radius. (8) Detection significance of the X-ray source. The term UGS1 has been defined to indicate UGS with a single potential X-ray counterpart. A portion of the table is shown to demonstrate its form and content. A machine-readable version of the full table is available at the CDS.
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