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.

4FGL J0850.8-4239

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J0850.8-4239 Swift-XRT detections in the field for 4FGL J0850.8-4239

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 08 51 15.70 -42 53 25.45 4.19 (7 ± 2) x 10-3 45 5.129 4.755

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 51 53.20 -42 50 08.48 4.50 (3.3 ± 1.1) x 10-3 26 3.201 2.899
2 08 50 56.36 -42 44 54.18 4.83 (3.1 ± 1.1) x 10-3 28 2.759 2.847
3 08 52 12.70 -42 48 52.15 4.49 (2.8 ± 1.1) x 10-3 25 3.409 2.537
4 08 51 45.50 -42 54 26.36 4.35 (2.4 ± 1.0) x 10-3 34 3.445 2.441
5 08 52 01.21 -42 40 48.80 4.72 (2.1 ± 0.9) x 10-3 18 2.745 2.331
6 08 52 13.64 -42 41 01.19 4.78 (1.6 ± 0.8) x 10-3 19 2.505 2.091
7 08 51 36.37 -42 51 36.09 4.69 (2.0 ± 1.0) x 10-3 23 2.675 2.009

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0850.8-4239 Swift-XRT image with known radio, optical and UV sources for 4FGL J0850.8-4239


No known X-ray or gamma ray sources found.

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NN 08 50 46.87 -42 39 23.04 1.03 ACRS
PPM 313684 08 50 46.87 -42 39 22.68 1.04 PPM
SAO 220563 08 50 46.75 -42 39 23.40 1.05 SAO
2 MGPS J085122-423823 08 51 22.10 -42 38 22.92 5.80 MGPS2
TGSSADR J085122.0-423820 08 51 22.10 -42 38 20.04 5.80 GMRTAS150M
3 PMN J0850-4240 08 50 17.40 -42 40 23.88 6.32 PMN
4 MGPS J085015-423922 08 50 15.19 -42 39 21.96 6.74 MGPS2
TGSSADR J085015.1-423920 08 50 15.19 -42 39 20.88 6.74 GMRTAS150M
5 MGPS J085101-423135 08 51 01.90 -42 31 36.12 8.52 MGPS2
TGSSADR J085101.8-423134 08 51 01.80 -42 31 35.04 8.54 GMRTAS150M
6 L 388-70 08 50 06.36 -42 37 14.52 8.75 NLTT
7 CC 263+01.1 08 50 59.50 -42 31 13.08 8.82 DIXON
PMN J0850-4231 08 50 58.10 -42 31 04.08 8.92 PMN
8 TGSSADR J085055.5-423057 08 50 55.51 -42 30 56.88 8.99 GMRTAS150M
9 TGSSADR J085122.1-423229 08 51 22.10 -42 32 29.04 9.30 GMRTAS150M
MGPS J085122-423228 08 51 22.30 -42 32 27.96 9.33 MGPS2
10 MGPS J085047-422939 08 50 47.81 -42 29 39.84 10.28 MGPS2
TGSSADR J085048.3-422933 08 50 48.41 -42 29 34.08 10.37 GMRTAS150M
11 PPM 313665 08 50 05.47 -42 33 37.80 10.57 PPM
CD-42 4691 08 50 05.45 -42 33 37.80 10.58 ACRS
SAO 220544 08 50 05.30 -42 33 38.52 10.59 SAO
12 PPM 756210 08 50 25.51 -42 49 47.28 10.98 PPM
13 TGSSADR J084954.1-423628 08 49 54.19 -42 36 29.16 11.12 GMRTAS150M
MGPS J084954-423621 08 49 54.31 -42 36 21.96 11.13 MGPS2
14 CD-42 4723 08 51 27.84 -42 30 16.56 11.71 ACRS
PPM 313700 08 51 27.84 -42 30 16.56 11.71 PPM
HD 75926 08 51 27.84 -42 30 16.56 11.71 HIC
HIP 43486 08 51 27.84 -42 30 16.56 11.71 HIPPARCOS
SAO 220581 08 51 27.86 -42 30 15.48 11.73 SAO
HR 3530 08 51 27.91 -42 30 15.84 11.73 BSC5P

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