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.

1FGL J2027.6+3335

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J2027.6+3335 Swift-XRT detections in the field for 1FGL J2027.6+3335

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 20 26 58.57 +33 43 04.20 4.26 (6.7 ± 0.7) x 10-3 94 9.513 8.987

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 20 29 02.94 +33 28 58.47 5.76 (8 ± 3) x 10-4 11 2.414 2.616
2 20 27 48.38 +33 27 44.17 5.31 (8 ± 3) x 10-4 21 2.471 2.514
3 20 27 57.12 +33 40 03.63 5.24 (7 ± 3) x 10-4 20 2.493 2.397
4 20 28 07.45 +33 35 33.28 5.40 (6 ± 3) x 10-4 16 2.489 2.111

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J2027.6+3335 Swift-XRT image with known radio, optical and UV sources for 1FGL J2027.6+3335

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 CXOGSG J202751.2+333208 20 27 51.22 +33 32 08.52 4.15 CHANDRA
2 CXOGSG J202801.8+333512 20 28 01.80 +33 35 12.48 4.64 CHANDRA
3 CXOGSG J202801.9+333636 20 28 01.99 +33 36 36.72 4.79 CHANDRA
4 CXOGSG J202757.3+333211 20 27 57.36 +33 32 12.12 4.97 CHANDRA
5 CXOGSG J202803.8+333402 20 28 03.89 +33 34 02.64 5.27 CHANDRA
6 CXOGSG J202804.8+333433 20 28 04.85 +33 34 33.60 5.34 CHANDRA
CXOGSG J202804.5+333354 20 28 04.51 +33 33 54.72 5.43 CHANDRA
7 CXOGSG J202802.8+333259 20 28 02.81 +33 32 59.64 5.46 CHANDRA
8 CXOGSG J202807.5+333542 20 28 07.54 +33 35 43.08 5.82 CHANDRA
9 CXOGSG J202805.4+333309 20 28 05.45 +33 33 09.00 5.88 CHANDRA
10 CXOGSG J202804.3+333154 20 28 04.34 +33 31 54.48 6.30 CHANDRA
11 CXOGSG J202809.1+333202 20 28 09.14 +33 32 02.04 7.07 CHANDRA
12 CXOGSG J202805.8+332934 20 28 05.81 +33 29 34.44 8.07 CHANDRA
13 CXOGSG J202819.8+333203 20 28 19.87 +33 32 03.84 9.07 CHANDRA
14 1WGA J2027.6+3344 20 27 37.99 +33 44 40.92 9.17 ROSAT
15 CXOGSG J202813.7+332935 20 28 13.70 +33 29 35.88 9.25 CHANDRA
16 CXOGSG J202819.5+333018 20 28 19.49 +33 30 18.36 9.81 CHANDRA
17 CXOGSG J202814.4+332803 20 28 14.45 +33 28 03.36 10.41 CHANDRA
1RXS J202658.5+334253 20 26 58.51 +33 42 52.92 11.29 ROSAT
1RXS J202658.5+334253 20 26 58.51 +33 42 52.92 11.29 ROSAT
2RXS J202658.3+334252 20 26 58.32 +33 42 52.92 11.31 ROSAT
18 XMMSL2 J202658.5+334309 20 26 58.63 +33 43 08.76 11.44 XMM-NEWTON
1WGA J2026.9+3343 20 26 57.50 +33 43 07.68 11.60 ROSAT
2RXP J202657.9+334324 20 26 57.84 +33 43 24.24 11.73 ROSAT
19 CXOGSG J202834.7+333212 20 28 34.70 +33 32 12.84 11.95 CHANDRA
20 CXOGSG J202833.0+333003 20 28 33.41 +33 30 03.60 12.40 CHANDRA
21 CXOGSG J202836.7+332953 20 28 36.77 +33 29 53.52 13.17 CHANDRA
22 CXOGSG J202831.5+332736 20 28 31.58 +33 27 36.36 13.41 CHANDRA

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 CGPS J202749+334144 20 27 49.70 +33 41 44.88 6.57 CGPSNGPCAT
CGPS J202811+333353 20 28 11.90 +33 33 54.00 6.92 CGPSNGPCAT
2 NVSS J202812+333347 20 28 12.10 +33 33 47.88 6.98 NVSS
TGSSADR J202748.7+332805 20 27 48.79 +33 28 05.16 7.68 GMRTAS150M
3 CGPS J202705+333847 20 27 05.81 +33 38 48.12 7.75 CGPSNGPCAT
CGPS J202748+332756 20 27 48.79 +33 27 56.16 7.82 CGPSNGPCAT
4 NVSS J202747+332745 20 27 48.00 +33 27 46.08 7.95 NVSS
WN 2025.8+3317 20 27 47.30 +33 27 36.00 8.09 WENSS
CGPS J202722+334301 20 27 22.30 +33 43 00.84 8.32 CGPSNGPCAT
5 NVSS J202722+334302 20 27 22.30 +33 43 01.92 8.34 NVSS
6 CGPS J202744+332714 20 27 44.71 +33 27 14.04 8.35 CGPSNGPCAT
GB6 J2027+3327 20 27 45.89 +33 27 06.12 8.52 GB6
CGPS J202727+334402 20 27 27.41 +33 44 02.04 8.88 CGPSNGPCAT
7 NVSS J202727+334407 20 27 27.10 +33 44 08.16 8.99 NVSS
8 PSR J2028+3332 20 28 19.90 +33 32 03.84 9.07 ATNFPULSAR
9 CGPS J202734+332540 20 27 34.01 +33 25 40.08 9.92 CGPSNGPCAT
10 NVSS J202822+334206 20 28 22.10 +33 42 06.84 11.03 NVSS
CGPS J202658+334302 20 26 58.51 +33 43 03.00 11.39 CGPSNGPCAT
11 NVSS J202658+334316 20 26 58.20 +33 43 15.96 11.59 NVSS
12 NVSS J202808+334551 20 28 08.40 +33 45 51.84 11.95 NVSS
CGPS J202808+334550 20 28 08.59 +33 45 51.12 11.96 CGPSNGPCAT
CGPS J202821+334402 20 28 21.79 +33 44 02.04 12.23 CGPSNGPCAT
13 NVSS J202821+334408 20 28 21.60 +33 44 08.88 12.28 NVSS
WN 2026.6+3319 20 28 36.50 +33 29 52.08 13.13 WENSS
TGSSADR J202836.7+332954 20 28 36.70 +33 29 53.88 13.16 GMRTAS150M
14 NVSS J202836+332954 20 28 36.89 +33 29 53.88 13.20 NVSS
CGPS J202837+332953 20 28 37.01 +33 29 53.88 13.22 CGPSNGPCAT
15 CGPS J202829+334344 20 28 29.59 +33 43 44.04 13.26 CGPSNGPCAT
WN 2025.1+3337 20 27 05.30 +33 47 12.12 13.69 WENSS
CGPS J202705+334716 20 27 05.69 +33 47 16.08 13.70 CGPSNGPCAT
TGSSADR J202705.3+334718 20 27 05.40 +33 47 18.96 13.77 GMRTAS150M
16 NVSS J202705+334719 20 27 05.30 +33 47 20.04 13.80 NVSS
17 NVSS J202653+332509 20 26 53.30 +33 25 09.12 14.17 NVSS
CGPS J202657+334645 20 26 57.00 +33 46 45.84 14.31 CGPSNGPCAT
18 CGPS J202658+332348 20 26 58.39 +33 23 48.12 14.53 CGPSNGPCAT
19 NVSS J202656+334707 20 26 56.71 +33 47 08.16 14.65 NVSS

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