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 J0838.5+4013

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0838.5+4013 Swift-XRT detections in the field for 4FGL J0838.5+4013

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 08 39 02.87 +40 15 49.49 4.95 (1.1 ± 0.2) x 10-2 44 6.206 5.861

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 38 41.26 +40 06 12.15 6.52 (2.6 ± 1.0) x 10-3 13 2.693 2.676
2 08 37 37.66 +40 18 43.29 6.12 (1.6 ± 0.9) x 10-3 9 2.287 1.791
3 08 37 37.28 +40 16 51.23 5.28 (9 ± 8) x 10-4 14 2.704 1.099

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0838.5+4013 Swift-XRT image with known radio, optical and UV sources for 4FGL J0838.5+4013

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 [MML2015] 5BZG J0839+4015 08 39 03.07 +40 15 45.72 6.57

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J083834+401045 08 38 34.61 +40 10 45.12 2.78 NVSS
FIRST J083834.7+401043 08 38 34.70 +40 10 42.96 2.82 FIRST
2 SDSS J08388+4014 08 38 50.59 +40 13 59.16 3.80 VERONCAT
3 FIRST J083814.8+401101 08 38 14.81 +40 11 02.04 3.90 FIRST
4 ZW 0835+4024 08 38 53.52 +40 13 26.40 4.32 ZWCLUSTERS
GB6 J0838+4012 08 38 08.59 +40 12 29.16 4.36 GB6
5 NVSS J083806+401239 08 38 06.79 +40 12 38.88 4.67 NVSS
FIRST J083806.7+401239 08 38 06.79 +40 12 38.88 4.67 FIRST
WN 0834.8+4023 08 38 06.79 +40 12 38.88 4.67 WENSS
7C 083449.0+402315 08 38 06.70 +40 12 42.84 4.68 UC7C151MHZ
TGSSADR J083806.7+401236 08 38 06.70 +40 12 36.00 4.69 GMRTAS150M
TXS 0834+403 08 38 06.70 +40 12 38.88 4.69 TEXAS
VLSSr J083806.3+401251 08 38 06.29 +40 12 51.84 4.72 VLSSR
6 209- 31 08 38 33.46 +40 07 56.28 5.52 NLTT
7 FIRST J083852.2+401750 08 38 52.30 +40 17 51.00 6.00 FIRST
WN 0835.7+4026A 08 38 55.20 +40 17 30.84 6.18 WENSS
8 NVSS J083855+401738 08 38 55.51 +40 17 38.04 6.29 NVSS
FIRST J083855.8+401736 08 38 55.80 +40 17 35.88 6.32 FIRST
TGSSADR J083855.9+401734 08 38 55.99 +40 17 34.08 6.32 GMRTAS150M
9 GB6 J0839+4016 08 39 01.01 +40 16 08.04 6.35 GB6
WN 0835.7+4026 08 39 01.61 +40 16 09.12 6.46 WENSS
0835+4027 08 39 00.70 +40 16 32.16 6.47 NORTH6CM
QORG J083903.0+401545 08 39 03.00 +40 15 45.00 6.55 QORGCAT
[MML2015] 5BZG J0839+4015 08 39 03.10 +40 15 46.08 6.57 ROMABZCAT
FIRST J083903.0+401545 08 39 03.10 +40 15 46.08 6.57 FIRST
10 NVSS J083903+401546 08 39 03.19 +40 15 47.16 6.60 NVSS
WN 0835.7+4026B 08 39 03.31 +40 15 45.00 6.60 WENSS
TGSSADR J083903.3+401545 08 39 03.41 +40 15 46.08 6.62 GMRTAS150M
11 PGC 3088000 08 38 43.90 +40 20 47.04 7.75 PGC2003
12 FIRST J083910.6+401032 08 39 10.70 +40 10 32.88 8.13 FIRST
13 FIRST J083848.2+400553 08 38 48.31 +40 05 53.16 8.26 FIRST
14 NVSS J083756+400733 08 37 56.81 +40 07 32.88 8.79 NVSS
15 MCG+07-18-033 08 38 59.76 +40 20 24.00 8.88 MCG
PGC 2164306 08 39 01.20 +40 20 12.12 8.90 PGC2003
16 0835+4015 08 38 41.21 +40 04 44.04 8.93 NORTH6CM
FIRST J083845.3+400454 08 38 45.31 +40 04 54.12 8.97 FIRST
QORG J083845.2+400453 08 38 45.19 +40 04 53.04 8.98 QORGCAT
GB6 J0838+4004 08 38 42.89 +40 04 39.00 9.09 GB6
17 SAO 42465 08 38 05.93 +40 21 11.16 9.09 SAO
18 UGC 4513 08 38 53.78 +40 21 24.84 9.10 UGC
BD+40 2084 08 38 05.66 +40 21 09.72 9.10 ACRS
PPM 50713 08 38 05.71 +40 21 10.08 9.10 PPM
WN 0835.4+4015B 08 38 44.81 +40 04 41.88 9.13 WENSS
TGSSADR J083844.9+400442 08 38 44.90 +40 04 42.96 9.13 GMRTAS150M
19 NVSS J083844+400441 08 38 44.71 +40 04 41.16 9.14 NVSS
7C 083526.9+401512 08 38 44.30 +40 04 37.92 9.18 UC7C151MHZ
VLSSr J083844.3+400437 08 38 44.30 +40 04 36.84 9.19 VLSSR
WN 0835.4+4015 08 38 43.49 +40 04 32.16 9.23 WENSS
FIRST J083844.3+400433 08 38 44.40 +40 04 33.96 9.25 FIRST
PGC 24325 08 39 00.70 +40 20 45.96 9.27 PGC2003
UZC J083900.7+402046 08 39 00.70 +40 20 45.96 9.27 UZC
08356+4032 08 39 00.77 +40 20 45.96 9.28 ZCAT
FIRST J083746.4+400929 08 37 46.39 +40 09 29.88 9.36 FIRST
20 NVSS J083746+400928 08 37 46.30 +40 09 28.08 9.40 NVSS
QORG J083832.4+400401 08 38 32.40 +40 04 00.84 9.43 QORGCAT
21 FIRST J083832.4+400400 08 38 32.40 +40 04 00.84 9.43 FIRST
FIRST J083808.1+402202 08 38 08.21 +40 22 01.92 9.63 FIRST
QORG J083808.2+402207 08 38 08.21 +40 22 06.96 9.70 QORGCAT
TGSSADR J083808.0+402205 08 38 07.99 +40 22 05.88 9.70 GMRTAS150M
WN 0835.4+4015A 08 38 38.50 +40 03 51.12 9.70 WENSS
22 NVSS J083808+402206 08 38 08.11 +40 22 06.96 9.70 NVSS
23 NVSS J083838+400348 08 38 38.40 +40 03 48.96 9.73 NVSS
FIRST J083838.6+400349 08 38 38.59 +40 03 48.96 9.73 FIRST
WN 0834.8+4032 08 38 07.20 +40 22 05.16 9.75 WENSS
TGSSADR J083838.6+400346 08 38 38.59 +40 03 47.16 9.77 GMRTAS150M
FIRST J083807.7+402211 08 38 07.70 +40 22 12.00 9.80 FIRST
TXS 0835+402 08 38 39.60 +40 03 46.08 9.81 TEXAS
24 FIRST J083848.4+402254 08 38 48.50 +40 22 54.12 10.04 FIRST
25 SAO 42473 08 39 17.47 +40 18 36.72 10.28 SAO
BD+40 2086 08 39 17.50 +40 18 36.72 10.29 ACRS
HD 73311 08 39 17.47 +40 18 37.08 10.29 HIC
PPM 50725 08 39 17.50 +40 18 37.08 10.29 PPM
HIP 42451 08 39 17.54 +40 18 37.08 10.30 HIPPARCOS
FIRST J083829.2+402449 08 38 29.30 +40 24 50.04 11.39 FIRST
26 NVSS J083829+402453 08 38 28.99 +40 24 52.92 11.46 NVSS

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