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 J0252.0-3657

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0252.0-3657 Swift-XRT detections in the field for 4FGL J0252.0-3657

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 51 48.94 -37 01 50.17 6.31 (5 ± 2) x 10-3 17 3.802 3.656

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 02 52 44.69 -36 53 03.81 7.48 (2.7 ± 1.1) x 10-3 7 2.419 2.417
2 02 51 45.61 -36 57 13.69 8.62 (2.5 ± 1.1) x 10-3 8 2.357 2.294

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0252.0-3657 Swift-XRT image with known radio, optical and UV sources for 4FGL J0252.0-3657


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
GLEAM J025206-365644 02 52 06.19 -36 56 44.88 1.07 GLEAMEGCAT
TGSSADR J025206.6-365647 02 52 06.70 -36 56 47.04 1.08 GMRTAS150M
1 NVSS J025206-365642 02 52 06.79 -36 56 43.08 1.16 NVSS
SUMSS J025206-365640 02 52 06.60 -36 56 40.92 1.17 SUMSS
2 PGC 631199 02 52 01.30 -36 53 57.84 3.81 PGC2003
3 PGC 630864 02 52 19.61 -36 55 30.00 3.83 PGC2003
4 PGC 629487 02 52 04.99 -37 01 33.96 3.84 PGC2003
5 NVSS J025142-365731 02 51 42.79 -36 57 30.96 4.25 NVSS
QORG J025142.8-365736 02 51 42.79 -36 57 36.00 4.25 QORGCAT
MWACS J0251.7-3701 02 51 46.90 -37 01 30.00 5.09 MWACS
6 NVSS J025147-370156 02 51 47.40 -37 01 57.00 5.37 NVSS
SUMSS J025147-370158 02 51 47.40 -37 01 58.08 5.39 SUMSS
GLEAM J025147-370155 02 51 46.99 -37 01 54.84 5.39 GLEAMEGCAT
7 PGC 629072 02 52 01.01 -37 03 06.12 5.40 PGC2003
TGSSADR J025147.2-370159 02 51 47.30 -37 01 59.16 5.42 GMRTAS150M
GLEAM J025228-370152 02 52 28.20 -37 01 51.96 6.36 GLEAMEGCAT
8 NVSS J025228-370148 02 52 28.51 -37 01 48.00 6.36 NVSS
QORG J025229.2-370148 02 52 29.21 -37 01 48.00 6.46 QORGCAT
9 CD-37 1071 02 51 46.94 -36 51 45.00 6.89 ACRS
PPM 278437 02 51 46.94 -36 51 43.92 6.91 PPM
10 NVSS J025200-370458 02 52 00.19 -37 04 59.16 7.28 NVSS
11 NVSS J025128-365422 02 51 28.39 -36 54 23.04 7.88 NVSS
QORG J025128.6-365417 02 51 28.61 -36 54 16.92 7.88 QORGCAT
TGSSADR J025246.7-370019 02 52 46.80 -37 00 20.16 8.92 GMRTAS150M
GLEAM J025246-370014 02 52 46.99 -37 00 15.12 8.93 GLEAMEGCAT
SUMSS J025246-370017 02 52 46.99 -37 00 18.00 8.95 SUMSS
12 NVSS J025247-370018 02 52 47.11 -37 00 18.00 8.96 NVSS
PPM 278457 02 52 47.11 -37 00 25.20 9.01 PPM
QORG J025247.2-370026 02 52 47.21 -37 00 25.92 9.03 QORGCAT
13 NVSS J025122-365329 02 51 22.10 -36 53 29.04 9.40 NVSS
PGC 631279 02 51 21.91 -36 53 33.00 9.41 PGC2003
QORG J025121.9-365332 02 51 21.91 -36 53 31.92 9.41 QORGCAT
MWACS J0251.5-3705 02 51 30.79 -37 05 29.04 10.20 MWACS
GLEAM J025130-370541 02 51 30.91 -37 05 40.92 10.34 GLEAMEGCAT
14 NVSS J025130-370542 02 51 30.91 -37 05 43.08 10.36 NVSS
SUMSS J025130-370544 02 51 31.01 -37 05 44.88 10.38 SUMSS
TGSSADR J025130.8-370544 02 51 30.91 -37 05 44.88 10.40 GMRTAS150M
15 HD 18048 02 52 45.05 -36 50 47.76 10.73 HIC
CD-37 1079 02 52 45.05 -36 50 47.76 10.74 ACRS
PPM 278456 02 52 45.05 -36 50 47.76 10.74 PPM
HIP 13417 02 52 45.05 -36 50 47.76 10.74 HIPPARCOS
SAO 193958 02 52 45.07 -36 50 46.68 10.75 SAO
16 PPM 278441 02 51 49.56 -37 08 12.48 10.87 PPM
17 NVSS J025124-370554 02 51 24.79 -37 05 53.88 11.33 NVSS
18 NVSS J025115-365104 02 51 15.31 -36 51 03.96 11.80 NVSS
GLEAM J025115-365047 02 51 15.00 -36 50 48.12 12.01 GLEAMEGCAT
19 NVSS J025135-370818 02 51 35.11 -37 08 18.96 12.05 NVSS
20 NVSS J025116-370826 02 51 16.01 -37 08 26.16 14.37 NVSS
21 PGC 632461 02 53 01.90 -36 48 02.16 15.10 PGC2003

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