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 J1544.2-2554

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1544.2-2554 Swift-XRT detections in the field for 4FGL J1544.2-2554

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 43 43.52 -25 56 07.32 5.49 (7 ± 2) x 10-3 21 3.757 3.465

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 15 43 34.70 -25 56 34.85 6.78 (3.2 ± 1.3) x 10-3 13 2.362 2.410
2 15 43 53.18 -25 42 41.76 6.21 (4 ± 2) x 10-3 11 2.345 2.347
3 15 43 58.61 -25 46 16.56 5.82 (3.0 ± 1.4) x 10-3 15 2.456 2.201

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1544.2-2554 Swift-XRT image with known radio, optical and UV sources for 4FGL J1544.2-2554


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 PPM 264634 15 44 20.54 -25 58 36.12 4.25 PPM
CD-2511060 15 44 20.54 -25 58 36.12 4.25 ACRS
2 PMN J1544-2550 15 44 16.10 -25 50 17.88 4.52 PMN
3 SPASS J154410-255012 15 44 10.30 -25 50 12.84 4.57 SPASS2P3GH
GLEAM J154412-255008 15 44 12.79 -25 50 08.88 4.60 GLEAMEGCAT
TXS 1541-256 15 44 12.70 -25 50 02.04 4.72 TEXAS
TGSSADR J154412.6-255001 15 44 12.60 -25 50 02.04 4.72 GMRTAS150M
[PME2013] J1544-2550 15 44 12.70 -25 50 00.96 4.73 AT2FGLUS
[SPT2015] ATCA J1544-2550 15 44 12.60 -25 50 00.96 4.73 FER2FUSRID
4 NVSS J154412-255000 15 44 12.70 -25 50 00.96 4.74 NVSS
5 NVSS J154346-255720 15 43 46.20 -25 57 20.16 6.47 NVSS
6 NVSS J154401-260150 15 44 01.80 -26 01 50.88 7.50 NVSS
TGSSADR J154401.7-260151 15 44 01.70 -26 01 50.88 7.51 GMRTAS150M
GLEAM J154402-260203 15 44 02.11 -26 02 03.84 7.68 GLEAMEGCAT
7 NVSS J154435-260324 15 44 35.90 -26 03 24.12 10.12 NVSS
8 NSV 7213 15 43 35.71 -25 47 44.16 10.86 GCVSNSVARS
9 NVSS J154433-254454 15 44 33.79 -25 44 53.88 10.94 NVSS
QORG J154433.6-254451 15 44 33.60 -25 44 51.00 10.98 QORGCAT

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