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 J2331.6+4430

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J2331.6+4430 Swift-XRT detections in the field for 4FGL J2331.6+4430

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 23 30 55.04 +44 41 49.15 4.78 (9 ± 2) x 10-3 44 6.278 5.708
2 23 31 29.38 +44 31 00.21 5.28 (7.5 ± 1.4) x 10-3 35 5.254 5.376
3 23 30 31.36 +44 31 37.25 6.12 (2.4 ± 0.8) x 10-3 14 3.057 3.142
4 23 31 25.14 +44 22 17.11 5.76 (3.1 ± 1.0) x 10-3 16 3.322 3.055

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J2331.6+4430 Swift-XRT image with known radio, optical and UV sources for 4FGL J2331.6+4430


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 NVSS J233129+443103 23 31 29.11 +44 31 03.00 1.30 NVSS
QORG J233129.0+443102 23 31 28.99 +44 31 01.92 1.32 QORGCAT
2 NVSS J233151+443059 23 31 52.01 +44 31 00.12 2.80 NVSS
3 MITG J2332+4428 23 32 02.59 +44 28 51.96 5.08 MITGB6CM
OZ+450 23 32 04.51 +44 29 34.08 5.18 DIXON
TGSSADR J233205.6+442957 23 32 05.59 +44 29 57.84 5.29 GMRTAS150M
QORG J233205.7+443001 23 32 05.71 +44 30 01.08 5.30 QORGCAT
TXS 2329+442 23 32 05.71 +44 29 58.92 5.31 TEXAS
WN 2329.6+4413 23 32 05.71 +44 29 57.84 5.32 WENSS
VLSSr J233205.8+443001 23 32 05.90 +44 30 02.16 5.33 VLSSR
4 NVSS J233205+442958 23 32 05.90 +44 29 57.84 5.34 NVSS
GB6 J2332+4430 23 32 06.91 +44 30 05.04 5.50 GB6
2329+4413 23 32 07.39 +44 29 56.04 5.62 NORTH6CM
2329+4413 23 32 07.39 +44 29 56.04 5.62 NORTH20CM
WN 2328.8+4418 23 31 13.39 +44 34 41.88 5.63 WENSS
5 NVSS J233113+443444 23 31 13.30 +44 34 44.04 5.66 NVSS
TGSSADR J233113.1+443444 23 31 13.10 +44 34 44.04 5.68 GMRTAS150M
VLSSr J233112.3+443451 23 31 12.41 +44 34 51.96 5.87 VLSSR
6 NVSS J233131+443723 23 31 31.20 +44 37 23.88 6.63 NVSS
7 NVSS J233132+442401 23 31 32.21 +44 24 01.08 6.85 NVSS
8 PGC 2243679 23 31 20.90 +44 24 28.08 6.93 PGC2003
WN 2329.9+4407 23 32 22.39 +44 24 33.84 10.34 WENSS
9 NVSS J233133+442029 23 31 33.10 +44 20 29.04 10.36 NVSS
10 NVSS J233222+442434 23 32 22.61 +44 24 33.84 10.36 NVSS
11 BD+43 4478 23 31 16.70 +44 20 24.36 11.00 ACRS
PPM 64342 23 31 16.66 +44 20 24.00 11.00 PPM
12 PGC 2241704 23 31 26.90 +44 19 31.08 11.44 PGC2003
13 NVSS J233104+444136 23 31 04.70 +44 41 36.96 12.16 NVSS
14 PGC 71684 23 32 01.01 +44 42 29.88 12.47 PGC2003
15 NVSS J233238+442447 23 32 38.50 +44 24 47.16 12.63 NVSS
16 PPM 64368 23 32 41.04 +44 39 25.92 14.38 PPM
SAO 53135 23 32 41.04 +44 39 25.92 14.38 SAO
HIP 116205 23 32 41.04 +44 39 26.28 14.39 HIPPARCOS
HD 221540 23 32 41.06 +44 39 26.28 14.39 HIC
BD+43 4484 23 32 41.09 +44 39 26.28 14.39 ACRS
17 NVSS J233030+441921 23 30 30.10 +44 19 22.08 16.47 NVSS

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