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 42.53 3.51 (1.201 ± 0.013) x 10-1 9954 89.180 93.440
2 12 27 24.99 -48 55 54.90 3.79 (1.6 ± 0.2) x 10-3 203 9.501 9.461
3 12 27 40.32 -48 46 08.33 3.74 (1.3 ± 0.2) x 10-3 215 8.839 8.417
4 12 26 47.59 -48 54 47.34 3.87 (1.3 ± 0.2) x 10-3 125 8.288 7.864
5 12 27 07.83 -48 56 09.10 3.79 (1.05 ± 0.14) x 10-3 158 7.563 7.552
6 12 27 42.72 -48 52 26.21 3.79 (8.4 ± 1.4) x 10-4 190 6.106 6.187
7 12 28 22.11 -48 50 39.25 3.81 (7.5 ± 1.3) x 10-4 175 5.623 5.805
8 12 28 05.64 -48 59 35.38 3.77 (7.5 ± 1.3) x 10-4 128 5.784 5.696
9 12 27 37.77 -49 00 04.50 3.80 (6.8 ± 1.2) x 10-4 145 5.954 5.649
10 12 27 19.31 -49 00 23.78 3.90 (5.2 ± 1.1) x 10-4 85 4.678 4.875
11 12 28 12.93 -48 49 48.28 3.82 (5.6 ± 1.2) x 10-4 147 4.432 4.687
12 12 27 45.97 -49 05 27.09 4.09 (4.3 ± 0.9) x 10-4 52 4.694 4.571
13 12 28 10.41 -48 58 51.01 3.77 (5.6 ± 1.2) x 10-4 158 5.397 4.558
14 12 28 49.21 -48 51 46.01 3.82 (4.6 ± 1.0) x 10-4 128 4.584 4.505
15 12 28 42.13 -48 55 44.80 3.82 (5.3 ± 1.2) x 10-4 96 4.219 4.486
16 12 28 17.56 -48 45 53.86 3.81 (4.9 ± 1.2) x 10-4 116 4.272 4.255
17 12 28 03.69 -48 46 38.87 3.83 (4.4 ± 1.1) x 10-4 124 4.356 4.214
18 12 27 02.77 -48 57 35.23 3.85 (4.4 ± 1.1) x 10-4 80 4.123 4.155
19 12 28 18.04 -48 47 24.30 3.80 (4.6 ± 1.1) x 10-4 140 4.137 4.093
20 12 28 04.81 -48 44 50.40 3.86 (3.9 ± 1.0) x 10-4 96 3.973 3.844
21 12 29 10.33 -48 52 07.40 4.29 (3.1 ± 0.8) x 10-4 40 3.235 3.809
22 12 27 36.94 -49 03 26.23 3.90 (3.8 ± 1.0) x 10-4 70 4.102 3.772
23 12 27 50.41 -48 56 59.29 3.84 (4.1 ± 1.1) x 10-4 130 4.216 3.731
24 12 26 56.95 -48 48 12.82 4.03 (3.5 ± 0.9) x 10-4 47 3.343 3.724
25 12 29 02.60 -49 01 02.77 4.35 (3.0 ± 0.8) x 10-4 40 3.336 3.719
26 12 27 17.03 -48 49 30.09 3.89 (3.8 ± 1.0) x 10-4 93 3.663 3.714
27 12 28 47.86 -48 55 25.14 3.84 (3.5 ± 1.0) x 10-4 86 3.900 3.552
28 12 27 44.40 -48 44 59.40 3.82 (3.7 ± 1.1) x 10-4 128 3.941 3.460
29 12 27 19.81 -48 46 16.47 3.86 (3.2 ± 0.9) x 10-4 109 4.294 3.385
30 12 28 42.23 -49 01 40.35 3.98 (2.9 ± 0.9) x 10-4 59 3.177 3.342
31 12 28 24.54 -48 55 38.33 3.85 (3.0 ± 1.0) x 10-4 108 3.221 3.158

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 58.66 -48 53 42.53 3.51 (7.5 ± 0.4) x 10-3 9932 18.310 19.740
2 12 27 37.77 -49 00 04.54 3.80 (4.4 ± 1.1) x 10-4 150 3.917 4.081
3 12 28 49.03 -48 51 29.25 3.81 (3.2 ± 1.0) x 10-4 137 3.434 3.236
4 12 28 34.40 -48 59 30.83 3.86 (2.6 ± 0.9) x 10-4 87 2.945 2.905
5 12 27 44.40 -48 44 59.40 3.82 (3.3 ± 1.1) x 10-4 128 3.163 2.893
6 12 28 55.04 -48 54 24.12 3.91 (2.4 ± 0.8) x 10-4 78 3.150 2.880
7 12 27 08.27 -48 57 24.19 3.83 (2.2 ± 0.9) x 10-4 88 3.038 2.510
8 12 28 05.38 -48 53 26.24 3.54 (1.6 ± 1.2) x 10-4 966 3.485 1.322
9 12 28 05.86 -48 53 25.38 3.55 (1.5 ± 1.2) x 10-4 867 3.399 1.260
10 12 27 58.66 -48 53 42.53 3.51 N/A 9896 12.630 N/A
11 12 27 58.66 -48 53 42.53 3.51 N/A 9954 10.700 N/A
12 12 27 58.66 -48 53 42.53 3.51 N/A 9932 9.373 N/A
13 12 27 58.66 -48 53 42.47 3.51 N/A 9852 12.720 N/A
14 12 27 58.66 -48 53 42.47 3.51 N/A 9852 3.872 N/A
15 12 27 58.66 -48 53 42.36 3.51 N/A 10013 5.825 N/A
16 12 27 58.66 -48 53 42.47 3.51 N/A 9827 4.683 N/A
17 12 27 58.66 -48 53 42.44 3.51 N/A 9896 4.297 N/A
18 12 27 58.66 -48 53 42.48 3.51 N/A 10013 5.493 N/A
19 12 27 58.66 -48 53 42.48 3.51 N/A 10013 5.599 N/A
20 12 27 58.66 -48 53 42.47 3.51 N/A 9852 6.694 N/A
21 12 27 58.66 -48 53 42.53 3.51 N/A 9896 3.960 N/A
22 12 27 58.66 -48 53 42.47 3.51 N/A 9852 5.733 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
HD 108462 12 27 56.62 -48 59 38.76 6.94 HIC
PPM 317457 12 27 56.62 -48 59 38.76 6.94 PPM
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

Penn State University Goddard Space Flight Center Swift