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 J1227.9-4852

Field

Detected Excesses

Swift-XRT image of the field for 1FGL J1227.9-4852 Swift-XRT detections in the field for 1FGL J1227.9-4852

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 12 27 58.66 -48 53 42.42 3.51 (1.234 ± 0.013) x 10-1 9929 89.120 93.280
2 12 27 24.94 -48 55 55.13 3.80 (1.6 ± 0.2) x 10-3 198 9.433 9.409
3 12 27 40.28 -48 46 08.76 3.74 (1.4 ± 0.2) x 10-3 210 8.840 8.461
4 12 26 47.61 -48 54 46.97 3.88 (1.2 ± 0.2) x 10-3 116 7.566 7.360
5 12 27 07.79 -48 56 09.65 3.80 (1.01 ± 0.14) x 10-3 148 7.291 7.286
6 12 27 42.60 -48 52 20.22 3.81 (8.5 ± 1.4) x 10-4 184 6.095 6.167
7 12 28 22.21 -48 50 40.09 3.83 (7.6 ± 1.3) x 10-4 168 5.532 5.734
8 12 27 37.76 -49 00 03.68 3.82 (7.1 ± 1.2) x 10-4 139 5.967 5.724
9 12 28 05.50 -48 59 34.23 3.79 (7.1 ± 1.3) x 10-4 130 5.715 5.406
10 12 27 19.38 -49 00 23.55 3.92 (5.2 ± 1.1) x 10-4 83 4.683 4.874
11 12 28 10.42 -48 58 50.99 3.77 (5.8 ± 1.2) x 10-4 156 5.402 4.836
12 12 28 13.00 -48 49 48.58 3.83 (5.8 ± 1.2) x 10-4 141 4.530 4.771
13 12 28 49.17 -48 51 46.12 3.83 (4.9 ± 1.1) x 10-4 125 4.543 4.587
14 12 28 17.43 -48 45 53.60 3.83 (5.2 ± 1.2) x 10-4 111 3.474 4.335
15 12 28 03.59 -48 46 38.39 3.84 (4.7 ± 1.1) x 10-4 121 4.228 4.331
16 12 27 45.95 -49 05 27.21 4.16 (4.0 ± 1.0) x 10-4 47 4.443 4.271
17 12 28 41.71 -48 55 50.79 3.82 (4.9 ± 1.2) x 10-4 95 3.962 4.195
18 12 28 18.03 -48 47 24.42 3.81 (4.8 ± 1.2) x 10-4 136 4.117 4.129
19 12 27 50.43 -48 56 59.34 3.85 (4.4 ± 1.1) x 10-4 128 4.395 4.097
20 12 28 04.73 -48 44 52.66 3.88 (4.0 ± 1.0) x 10-4 94 3.820 4.067
21 12 27 02.76 -48 57 35.32 3.86 (4.3 ± 1.1) x 10-4 78 4.079 3.993
22 12 27 36.94 -49 03 26.28 3.92 (4.0 ± 1.0) x 10-4 70 4.205 3.871
23 12 27 17.00 -48 49 29.96 3.90 (4.0 ± 1.1) x 10-4 91 3.618 3.767
24 12 29 02.60 -49 01 02.77 4.36 (3.1 ± 0.9) x 10-4 40 3.463 3.694
25 12 29 10.33 -48 52 07.40 4.33 (2.8 ± 0.8) x 10-4 40 3.294 3.564
26 12 26 56.99 -48 48 12.88 4.06 (3.2 ± 0.9) x 10-4 43 2.959 3.508
27 12 27 19.86 -48 46 17.04 3.88 (3.4 ± 1.0) x 10-4 109 4.250 3.498
28 12 28 47.91 -48 55 24.11 3.85 (3.5 ± 1.0) x 10-4 80 3.836 3.416
29 12 27 44.39 -48 44 56.54 3.83 (3.5 ± 1.1) x 10-4 130 3.791 3.273

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 12 27 37.76 -49 00 03.69 3.82 (4.5 ± 1.1) x 10-4 139 3.918 4.037
2 12 26 47.61 -48 54 46.97 3.88 (2.9 ± 0.9) x 10-4 116 3.368 3.251
3 12 28 49.11 -48 51 18.18 3.80 (3.1 ± 1.0) x 10-4 120 3.377 3.103
4 12 28 34.46 -48 59 29.54 3.88 (2.7 ± 0.9) x 10-4 82 3.039 2.950
5 12 28 42.43 -49 01 40.01 4.02 (2.4 ± 0.8) x 10-4 55 2.845 2.949
6 12 28 55.06 -48 54 24.74 3.93 (2.5 ± 0.9) x 10-4 77 3.245 2.939
7 12 27 47.89 -48 43 41.18 3.87 (2.6 ± 0.9) x 10-4 89 2.915 2.871
8 12 27 44.39 -48 44 56.54 3.83 (3.1 ± 1.1) x 10-4 122 3.131 2.793
9 12 27 08.20 -48 57 23.80 3.84 (2.3 ± 0.9) x 10-4 84 3.116 2.572
10 12 27 58.66 -48 53 42.42 3.51 (7 ± 3) x 10-4 9872 14.420 2.562
11 12 28 05.84 -48 53 25.22 3.55 (1.6 ± 1.2) x 10-4 854 3.458 1.326
12 12 27 59.46 -48 53 41.59 3.51 (2 ± 2) x 10-4 9721 3.745 1.033
13 12 27 58.66 -48 53 42.42 3.51 N/A 9872 13.510 N/A
14 12 27 58.66 -48 53 42.42 3.51 N/A 9929 11.410 N/A
15 12 27 58.66 -48 53 42.45 3.51 N/A 9828 3.489 N/A
16 12 27 58.66 -48 53 42.45 3.51 N/A 9828 14.110 N/A
17 12 27 58.66 -48 53 42.35 3.51 N/A 9987 5.823 N/A
18 12 27 58.66 -48 53 42.45 3.51 N/A 9828 6.464 N/A
19 12 27 58.66 -48 53 42.55 3.51 N/A 9803 4.533 N/A
20 12 27 58.66 -48 53 42.42 3.51 N/A 9872 4.358 N/A
21 12 27 58.66 -48 53 42.35 3.51 N/A 9987 5.554 N/A
22 12 27 58.66 -48 53 42.55 3.51 N/A 9828 5.840 N/A
23 12 27 58.66 -48 53 42.45 3.51 N/A 9803 4.924 N/A
24 12 27 58.66 -48 53 42.35 3.51 N/A 10005 3.294 N/A
25 12 27 58.66 -48 53 42.35 3.51 N/A 9960 5.589 N/A
26 12 27 58.66 -48 53 42.55 3.51 N/A 9828 6.733 N/A
27 12 27 58.66 -48 53 42.42 3.51 N/A 9929 6.637 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 1FGL J1227.9-4852 Swift-XRT image with known radio, optical and UV sources for 1FGL J1227.9-4852

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 XMMSL1 J122759.0-485338 12 27 59.04 -48 53 37.68 1.17 XMM-NEWTON
J1227-4853 12 27 58.70 -48 53 43.08 1.21
6dFGS J1227588-485343 12 27 58.78 -48 53 42.72 1.22 ROSAT
1RXS J122758.8-485343 12 27 58.80 -48 53 43.08 1.22 ROSAT
1RXS J122758.8-485343 12 27 58.80 -48 53 43.44 1.23 ROSAT
2 1RXS J122805.3-485639 12 28 05.30 -48 56 39.12 4.32 ROSAT
3 XSS J12270-4859 12 26 59.40 -49 00 21.60 11.86 RXTE

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 J1227-4853 12 27 58.70 -48 53 43.08 1.21 RITTERLMXB
2 SUMSS J122820-485537 12 28 21.00 -48 55 36.84 5.22 SUMSS
3 CD-48 7440 12 27 56.59 -48 59 38.40 6.94 ACRS
HIP 60817 12 27 56.62 -48 59 38.40 6.94 HIPPARCOS
SAO 223453 12 27 56.64 -48 59 38.40 6.94 SAO
PPM 317457 12 27 56.62 -48 59 38.76 6.94 PPM
HD 108462 12 27 56.62 -48 59 38.76 6.94 HIC
4 GJ 9406 12 26 51.24 -48 54 42.48 10.61 WOOLLEY
HIP 60729 12 26 48.72 -48 54 46.80 11.03 HIPPARCOS
5 -48:7426 12 26 48.14 -48 54 35.64 11.09 NLTT
HD 108309 12 26 48.22 -48 54 47.88 11.11 HIC
HR 4734 12 26 48.19 -48 54 47.88 11.11 BSC5P
SAO 223443 12 26 48.19 -48 54 47.88 11.11 SAO
PPM 317439 12 26 48.17 -48 54 47.52 11.12 PPM
CD-48 7426 12 26 48.14 -48 54 47.88 11.12 ACRS
LHS 2560 12 26 48.14 -48 54 47.52 11.12 REVISEDLHS
6 SUMSS J122653-485731 12 26 53.50 -48 57 32.04 11.14 SUMSS
7 PPM 758974 12 27 24.70 -49 03 02.16 11.43 PPM
8 NSV 5641 12 28 58.80 -48 42 24.84 14.76 GCVSNSVARS

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