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 J0821.5-1436

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J0821.5-1436 Swift-XRT detections in the field for 4FGL J0821.5-1436

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 08 20 51.11 -14 34 22.54 5.64 (2.6 ± 0.8) x 10-3 17 3.344 3.359

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 21 54.73 -14 36 35.17 6.12 (1.8 ± 0.6) x 10-3 16 2.888 2.823
2 08 22 28.40 -14 40 01.46 7.48 (1.9 ± 0.7) x 10-3 9 2.434 2.730
3 08 21 39.28 -14 31 23.67 6.31 (1.6 ± 0.6) x 10-3 14 2.526 2.600
4 08 21 52.26 -14 38 01.38 6.21 (1.5 ± 0.6) x 10-3 16 2.501 2.556
5 08 22 09.76 -14 39 59.36 6.21 (1.1 ± 0.5) x 10-3 11 2.382 2.131

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0821.5-1436 Swift-XRT image with known radio, optical and UV sources for 4FGL J0821.5-1436


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
TGSSADR J082117.3-143104 08 21 17.40 -14 31 04.08 6.95 GMRTAS150M
1 NVSS J082117-143104 08 21 17.30 -14 31 04.08 6.97 NVSS
GLEAM J082116-143100 08 21 16.49 -14 31 00.84 7.13 GLEAMEGCAT
2 NVSS J082158-144238 08 21 58.49 -14 42 38.88 8.32 NVSS
TGSSADR J082158.3-144240 08 21 58.30 -14 42 41.04 8.32 GMRTAS150M
3 SAO 154156 08 21 43.94 -14 26 10.68 10.55 SAO
PPM 220003 08 21 43.90 -14 26 10.32 10.55 PPM
4 NVSS J082051-143627 08 20 51.50 -14 36 27.00 10.59 NVSS
5 PPM 220014 08 22 15.84 -14 40 54.12 10.75 PPM
6 NVSS J082051-143421 08 20 51.19 -14 34 22.08 10.87 NVSS
7 SAO 154157 08 21 47.71 -14 26 03.12 10.88 SAO
PPM 220004 08 21 47.66 -14 26 02.40 10.89 PPM
BD-13 2501 08 21 47.66 -14 26 02.40 10.89 ACRS
QORG J082051.0-143423 08 20 51.00 -14 34 23.16 10.92 QORGCAT
TGSSADR J082131.0-142521 08 21 31.10 -14 25 22.08 11.19 GMRTAS150M
8 NVSS J082131-142519 08 21 31.30 -14 25 18.84 11.23 NVSS
GLEAM J082130-142514 08 21 30.79 -14 25 14.16 11.33 GLEAMEGCAT
9 NVSS J082148-144737 08 21 48.19 -14 47 36.96 11.54 NVSS
QORG J082148.2-144739 08 21 48.19 -14 47 39.12 11.57 QORGCAT
TGSSADR J082148.3-144739 08 21 48.29 -14 47 39.12 11.58 GMRTAS150M
10 PPM 219997 08 21 28.78 -14 48 16.20 11.86 PPM
BD-14 2485 08 21 28.75 -14 48 16.20 11.87 ACRS
SAO 154151 08 21 28.61 -14 48 16.92 11.88 SAO
11 NVSS J082215-142736 08 22 15.50 -14 27 37.08 13.18 NVSS
12 PPM 715240 08 20 47.74 -14 44 41.64 14.11 PPM

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