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 J0240.2-0248

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J0240.2-0248 Swift-XRT detections in the field for 4FGL J0240.2-0248

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 02 40 01.94 -02 43 20.88 3.98 (1.8 ± 0.2) x 10-2 158 11.670 11.740
2 02 40 04.56 -02 45 04.63 4.02 (1.6 ± 0.2) x 10-2 141 10.580 10.840
3 02 39 45.51 -02 34 39.43 4.81 (5.0 ± 0.8) x 10-3 46 6.416 6.362
4 02 40 23.81 -02 53 30.84 4.95 (3.3 ± 0.7) x 10-3 35 4.787 4.515
5 02 40 12.19 -02 33 42.69 5.89 (2.4 ± 0.6) x 10-3 20 4.038 4.151
6 02 40 04.56 -02 34 22.57 6.12 (2.0 ± 0.5) x 10-3 18 3.698 4.101

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 40 20.96 -02 40 00.73 5.70 (1.4 ± 0.5) x 10-3 18 3.123 2.862
2 02 39 41.10 -02 31 55.24 6.93 (1.0 ± 0.4) x 10-3 11 2.552 2.621
3 02 40 02.80 -02 39 03.18 5.70 (10 ± 4) x 10-4 14 2.517 2.206
4 02 40 09.64 -02 56 40.10 6.52 (8 ± 4) x 10-4 13 2.297 1.993

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J0240.2-0248 Swift-XRT image with known radio, optical and UV sources for 4FGL J0240.2-0248

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 2RXS J024004.8-024529 02 40 04.85 -02 45 29.16 3.63 ROSAT
2RXS J024004.8-024529 02 40 04.85 -02 45 29.16 3.63 ROSAT
2 2E 0237.5-0257 02 40 01.80 -02 44 19.68 5.01 EINSTEIN
2E 0237.5-0257 02 40 01.78 -02 44 19.32 5.02 EINSTEIN

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 FIRST J024020.1-024702 02 40 20.11 -02 47 03.12 2.34 FIRST
2 PGC 1083564 02 40 26.40 -02 45 37.08 4.46 PGC2003
PGC 1084318 02 40 21.19 -02 43 42.96 5.24 PGC2003
3 MCG-01-07-028 02 40 13.68 -02 43 08.40 5.38 MCG
Unknown 02 40 12.00 -02 43 00.12 5.52 RC3
4 PGC 10106 02 40 24.10 -02 43 44.04 5.55 PGC2003
QORG J024022.6-024329 02 40 22.61 -02 43 28.92 5.59 QORGCAT
5 NVSS J024022-024326 02 40 22.39 -02 43 27.12 5.61 NVSS
QORG J024024.4-025334 02 40 24.41 -02 53 34.08 5.82 QORGCAT
FIRST J024024.3-025334 02 40 24.41 -02 53 35.16 5.83 FIRST
6 NVSS J024024-025335 02 40 24.41 -02 53 35.16 5.84 NVSS
NVSS J024024-0253 02 40 24.41 -02 53 35.16 5.84 OVRO31GHZ
7 MCG-01-07-029 02 40 25.68 -02 43 08.40 6.26 MCG
8 PGC 1084871 02 40 05.30 -02 42 15.12 6.54 PGC2003
9 NVSS J023955-024245 02 39 55.90 -02 42 45.00 7.15 NVSS
NVSS J023955-0242 02 39 55.90 -02 42 45.00 7.15 OVRO31GHZ
10 PGC 1084974 02 40 00.00 -02 41 58.92 7.27 PGC2003
11 A0238-0256 02 40 32.93 -02 43 11.28 7.33 ZCAT
PGC 10118 02 40 33.00 -02 43 12.00 7.33 PGC2003
12 PPM 184884 02 40 02.26 -02 55 48.00 7.75 PPM
SAO 130044 02 40 02.18 -02 55 48.36 7.76 SAO
13 PGC 175365 02 39 49.10 -02 53 43.08 7.88 PGC2003
14 PGC 1085501 02 40 18.29 -02 40 40.08 7.97 PGC2003
15 NVSS J024002-024006 02 40 02.71 -02 40 05.88 8.78 NVSS
FIRST J024047.7-024608 02 40 47.71 -02 46 08.04 9.03 FIRST
16 NVSS J024047-024608 02 40 47.81 -02 46 09.12 9.06 NVSS
17 [SHM2012] 157 02 40 07.70 -02 39 29.16 9.13 WMAPITNPTS
18 PGC 1079476 02 40 44.50 -02 56 29.04 11.23 PGC2003
19 PCCS2 044 G174.24-54.33 02 39 51.31 -02 38 03.12 11.76 PCCS044GHZ
FIRST J023951.6-023758 02 39 51.60 -02 37 58.08 11.80 FIRST
FIRST J023949.3-023803 02 39 49.39 -02 38 03.84 11.99 FIRST
20 FIRST J023949.1-023752 02 39 49.10 -02 37 53.04 12.18 FIRST
FIRST J023947.3-023801 02 39 47.30 -02 38 00.96 12.28 FIRST
21 FIRST J024000.0-023637 02 40 00.00 -02 36 37.08 12.31 FIRST
22 PPM 184905 02 40 57.50 -02 43 10.20 12.37 PPM
23 FIRST J023953.0-023650 02 39 53.11 -02 36 50.04 12.68 FIRST
FIRST J023928.9-025602 02 39 28.90 -02 56 02.04 13.30 FIRST
24 NVSS J023928-025607 02 39 28.90 -02 56 07.08 13.35 NVSS
25 FIRST J023938.2-023733 02 39 38.30 -02 37 32.88 13.94 FIRST
26 NVSS J024057-025725 02 40 57.41 -02 57 24.84 14.25 NVSS
NVSS J024057-0257 02 40 57.41 -02 57 24.84 14.25 OVRO31GHZ
FIRST J024057.5-025726 02 40 57.60 -02 57 25.92 14.30 FIRST
TGSSADR J024057.6-025727 02 40 57.60 -02 57 28.08 14.33 GMRTAS150M
27 PGC 1079380 02 39 25.20 -02 56 47.04 14.48 PGC2003
28 FIRST J023931.6-023815 02 39 31.70 -02 38 16.08 14.51 FIRST
29 FIRST J023936.5-023653 02 39 36.50 -02 36 52.92 14.75 FIRST

Penn State University Goddard Space Flight Center Swift