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 J0838.6-2828

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J0838.6-2828 Swift-XRT detections in the field for 1FGL J0838.6-2828

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 08 38 43.38 -28 27 01.55 3.55 (1.02 ± 0.02) x 10-1 1930 40.600 41.870
2 08 38 57.43 -28 18 16.69 4.39 (2.4 ± 0.4) x 10-3 56 6.232 5.983
3 08 38 30.32 -28 25 52.78 4.45 (1.5 ± 0.4) x 10-3 51 4.522 4.245
4 08 38 57.76 -28 31 02.81 4.97 (10 ± 3) x 10-4 33 3.604 3.484
5 08 39 17.33 -28 24 03.54 5.40 (8 ± 3) x 10-4 20 3.286 3.272
6 08 39 03.54 -28 19 25.51 4.76 (9 ± 3) x 10-4 26 3.586 3.265
7 08 38 59.21 -28 34 17.36 4.95 (8 ± 3) x 10-4 30 3.133 3.133

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 08 38 56.33 -28 19 13.52 4.46 (9 ± 3) x 10-4 20 3.508 2.857
2 08 37 58.61 -28 28 27.44 4.63 (8 ± 3) x 10-4 24 3.077 2.775
3 08 39 25.67 -28 24 55.64 5.17 (5 ± 2) x 10-4 24 2.476 2.539
4 08 39 04.79 -28 26 35.30 4.95 (6 ± 2) x 10-4 28 2.551 2.426
5 08 38 57.47 -28 26 56.00 5.14 (5 ± 2) x 10-4 30 2.590 2.231
6 08 38 43.37 -28 27 01.71 3.55 (2.8 ± 1.3) x 10-3 1952 5.919 2.230
7 08 38 43.39 -28 27 01.74 3.55 (7 ± 4) x 10-4 1923 3.417 1.692
8 08 39 05.41 -28 18 41.42 4.80 (3 ± 2) x 10-4 20 2.488 1.628
9 08 38 43.38 -28 27 01.55 3.55 (3 ± 49) x 10-5 1919 4.403 0.057
10 08 38 43.38 -28 27 01.55 3.55 N/A 1916 3.812 N/A
11 08 38 43.37 -28 27 01.72 3.55 N/A 1919 2.803 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J0838.6-2828 Swift-XRT image with known radio, optical and UV sources for 1FGL J0838.6-2828

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1RXS J083842.1-282723 08 38 42.10 -28 27 23.04 1.42 ROSAT
1RXS J083842.1-282723 08 38 42.10 -28 27 23.04 1.42 ROSAT
1 XMMSL1 J083842.9-282657 08 38 42.91 -28 26 57.48 1.87 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J083830-282553 08 38 30.10 -28 25 53.04 3.69 NVSS
MGPS J083830-282547 08 38 30.00 -28 25 46.92 3.78 MGPS2
2 PPM 728842 08 38 31.30 -28 24 50.04 4.43 PPM
3 NVSS J083858-282254 08 38 58.80 -28 22 54.12 7.09 NVSS
4 SAO 176214 08 38 25.90 -28 22 00.12 7.50 SAO
PPM 254885 08 38 25.90 -28 21 59.04 7.51 PPM
CGMW 2-4054 08 38 21.67 -28 35 11.04 7.65 CGMW
PGC 81711 08 38 21.00 -28 35 21.12 7.87 PGC2003
5 NVSS J083820-283523 08 38 20.71 -28 35 24.00 7.94 NVSS
6 NVSS J083822-282151 08 38 22.51 -28 21 51.12 7.98 NVSS
MGPS J083822-282113 08 38 22.39 -28 21 14.04 8.53 MGPS2
7 NVSS J083902-282123 08 39 02.50 -28 21 23.04 8.81 NVSS
8 NVSS J083822-282052 08 38 22.20 -28 20 53.16 8.87 NVSS
9 NVSS J083759-282457 08 37 59.11 -28 24 56.88 9.90 NVSS
10 WDS J08394-2823 08 39 24.00 -28 22 59.88 11.15 WDS
SAO 176238 08 39 23.16 -28 22 37.92 11.18 SAO
PPM 254908 08 39 23.23 -28 22 39.72 11.18 PPM
HIP 42456 08 39 23.23 -28 22 39.72 11.18 HIPPARCOS
CD-27 5750 08 39 23.23 -28 22 39.36 11.18 ACRS
HD 73806 08 39 23.21 -28 22 38.64 11.19 HIC
11 NVSS J083800-283706 08 38 00.41 -28 37 05.88 12.15 NVSS
12 CGMW 2-4107 08 39 17.69 -28 38 14.28 12.49 CGMW
PGC 81759 08 39 17.71 -28 38 30.12 12.69 PGC2003
13 PPM 728856 08 39 34.27 -28 21 37.08 13.79 PPM
14 NVSS J083750-283934 08 37 51.00 -28 39 33.84 15.35 NVSS

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