Swift-XRT Survey of Fermi Unassociated Sources

These results are part of the Swift program to follow-up Fermi unassociated sources in an attempt to find X-ray counterparts to the unidentified gamma-ray sources. As new observations are performed, these pages will be updated in nearly real time. Please use these results as a guide and proceed with caution when using them in a publication since they are the result of an automated analysis.

When using these data and results in publications, please reference M.C. Stroh & A.D. Falcone 2013, ApJS, 207, 28; arXiv: 1305.4949 for a description of many of the analysis techniques used to reduce these data (note: a more detailed paper describing the complete data set and analysis is forthcoming). Please contact Abe Falcone and Michael Stroh at unassociated@swift.psu.edu if you have any questions about the program or the analysis, or to simply to let us know that you've made use of these data.
Caution: For completeness, sources are listed if the "detection" exceeds 3 sigma. The significances and images are shown so you can make more stringent significance cuts, if desired.

1FGL J1258.3+2125

Field

Detected Excesses
Swift-XRT image of the field for 1FGL J1258.3+2125 Swift-XRT detections in the field for 1FGL J1258.3+2125

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 12 58 21.46 +21 23 52.01 4.47 (1.8 ± 0.2) x 10-2 77 7.900 7.756

Rejected Excesses (Due to Overlaps or SNR(Sosta) < 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 12 58 04.51 +21 25 24.06 6.52 (2.9 ± 1.0) x 10-3 14 2.883 2.897
2 12 57 45.54 +21 22 15.81 6.78 (2.3 ± 0.9) x 10-3 13 2.615 2.641
3 12 58 49.47 +21 17 57.06 6.04 (2.2 ± 0.9) x 10-3 18 2.727 2.523

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1258.3+2125 Swift-XRT image with known radio, optical and UV sources for 1FGL J1258.3+2125

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1RXS J125820.4+212700 12 58 20.40 +21 27 00.36 1.77 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
FIRST J125821.7+212359 12 58 21.70 +21 23 58.92 1.27 FIRST
1 NVSS J125821+212352 12 58 21.41 +21 23 52.08 1.38 NVSS
GB6 J1258+2123 12 58 21.19 +21 23 51.00 1.40 GB6
FIRST J125821.4+212351 12 58 21.41 +21 23 51.00 1.40 FIRST
2 FIRST J125832.5+212216 12 58 32.59 +21 22 17.04 4.01 FIRST
3 FIRST J125808.8+212832 12 58 08.81 +21 28 32.16 4.34 FIRST
4 4C+21.37 12 58 33.79 +21 21 30.96 4.78 DIXON
5 FIRST J125817.9+211918 12 58 18.00 +21 19 18.12 5.98 FIRST
6 FIRST J125812.6+211923 12 58 12.60 +21 19 23.16 6.18 FIRST
FIRST J125811.2+211923 12 58 11.21 +21 19 23.16 6.29 FIRST
7 FIRST J125810.1+211924 12 58 10.10 +21 19 23.88 6.37 FIRST
1256+2135 12 58 34.61 +21 19 15.96 6.76 NORTH6CM
1256+2135 12 58 34.61 +21 19 15.96 6.76 NORTH20CM
FIRST J125833.9+211907 12 58 33.91 +21 19 06.96 6.82 FIRST
GB6 J1258+2119 12 58 34.51 +21 19 10.92 6.83 GB6
8 NVSS J125834+211907 12 58 34.70 +21 19 08.04 6.90 NVSS
TGSSADR J125834.7+211907 12 58 34.70 +21 19 06.96 6.91 GMRTAS150M
TXS 1256+215 12 58 34.70 +21 19 06.96 6.91 TEXAS
VLSSr J125834.7+211906 12 58 34.70 +21 19 06.96 6.92 VLSSR
WE 1256+21W1 12 58 34.80 +21 19 06.96 6.92 DIXON
7C 125607.7+213515 12 58 34.99 +21 19 04.08 6.98 LD7C151MHZ
GLEAM J125834+211904 12 58 34.99 +21 19 04.08 6.98 GLEAMEGCAT
9 MITG J1258+2119 12 58 37.61 +21 19 24.96 7.00 MITGB6CM
FIRST J125835.5+211907 12 58 35.50 +21 19 06.96 7.00 FIRST
FIRST J125839.0+211904 12 58 39.10 +21 19 05.16 7.47 FIRST
10 PKS J1258+2118 12 58 37.20 +21 18 42.84 7.54 PKSCAT90
PKS1256+21 12 58 37.30 +21 18 42.84 7.55 DIXON
FIRST J125758.7+213054 12 57 58.70 +21 30 55.08 7.68 FIRST
11 NVSS J125758+213058 12 57 58.90 +21 30 57.96 7.70 NVSS
12 FIRST J125842.3+211902 12 58 42.29 +21 19 03.00 7.95 FIRST
13 FIRST J125836.6+211720 12 58 36.70 +21 17 21.12 8.71 FIRST
14 FIRST J125748.9+211939 12 57 48.89 +21 19 39.00 9.33 FIRST
FIRST J125848.1+211804 12 58 48.10 +21 18 03.96 9.56 FIRST
15 NVSS J125848+211803 12 58 48.79 +21 18 02.88 9.67 NVSS
16 FIRST J125838.7+211609 12 58 38.81 +21 16 09.12 9.99 FIRST
17 FIRST J125903.5+212324 12 59 03.60 +21 23 24.00 10.09 FIRST
18 FIRST J125854.8+213225 12 58 54.91 +21 32 26.16 10.66 FIRST
19 NVSS J125732+212457 12 57 32.71 +21 24 57.96 11.25 NVSS
20 NVSS J125754+213555 12 57 54.41 +21 35 56.04 12.34 NVSS
FIRST J125754.0+213558 12 57 54.10 +21 35 58.92 12.42 FIRST
21 FIRST J125756.3+213700 12 57 56.40 +21 37 00.12 13.08 FIRST
22 NVSS J125911+213544 12 59 11.50 +21 35 44.88 15.75 NVSS
FIRST J125911.8+213539 12 59 11.81 +21 35 39.84 15.75 FIRST

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