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 J1554.2+2008

Field

Detected Excesses
Swift-XRT image of the field for 4FGL J1554.2+2008 Swift-XRT detections in the field for 4FGL J1554.2+2008

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 15 54 24.14 +20 11 23.96 3.63 (1.38 ± 0.06) x 10-1 698 24.620 25.230
2 15 54 34.47 +20 18 37.76 4.83 (6.4 ± 1.3) x 10-3 47 6.186 4.876
3 15 53 31.08 +20 09 42.42 5.70 (3.8 ± 1.0) x 10-3 20 4.042 3.918

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 15 54 24.14 +20 11 23.96 3.63 N/A 698 2.433 N/A

X-Ray and Gamma Ray Catalogs

More Catalogs
Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1554.2+2008 Swift-XRT image with known radio, optical and UV sources for 4FGL J1554.2+2008

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1554.3+2011 15 54 22.99 +20 11 07.08 3.27 ROSAT
ROXASDC J155423.5+201117.3 15 54 23.50 +20 11 17.16 3.48 ROSAT
1WGA J1554.4+2011 15 54 24.00 +20 11 15.00 3.54 ROSAT
MS 1552.1+ 15 54 24.31 +20 11 16.08 3.60 ROSAT
1RXS J155424.3+201116 15 54 24.31 +20 11 16.08 3.60 ROSAT
1RXS J155424.3+201116 15 54 24.31 +20 11 16.08 3.60 ROSAT
1RXS J155424.3+201116 15 54 24.31 +20 11 16.08 3.60 ROSAT
2RXS J155424.3+201115 15 54 24.31 +20 11 16.08 3.60 ROSAT
2RXS J155424.3+201115 15 54 24.31 +20 11 16.08 3.60 ROSAT
2RXP J155424.1+201125 15 54 24.05 +20 11 25.08 3.66 ROSAT
MS 1552.1+2020 15 54 24.10 +20 11 25.08 3.67
1RXS J155424.3+201116 15 54 24.17 +20 11 24.36 3.67 ROSAT
[MML2015] 5BZB J1554+2011 15 54 24.12 +20 11 25.44 3.68
2RXP J155424.0+201130 15 54 23.95 +20 11 29.76 3.70 ROSAT
2 2E 1552.1+2020 15 54 24.43 +20 11 47.76 3.99 EINSTEIN
2E 1552.1+2020 15 54 24.50 +20 11 48.12 4.01 EINSTEIN
MS1552.1+2020 15 54 24.60 +20 11 47.76 4.02 EINSTEIN
3 ... 15 54 26.69 +20 11 35.88 4.24 EINSTEIN
4 1WGA J1554.5+2008 15 54 32.30 +20 08 49.20 4.58 ROSAT
2RXP J155432.4+200859 15 54 32.35 +20 08 58.92 4.59 ROSAT
5 1WGA J1553.8+2011 15 53 52.30 +20 11 16.80 5.37 ROSAT
6 1WGA J1553.5+2009 15 53 31.20 +20 09 29.52 9.78 ROSAT
7 1WGA J1553.4+2009 15 53 28.90 +20 09 31.32 10.32 ROSAT
8 1WGA J1554.9+2012 15 54 57.00 +20 12 40.68 11.05 ROSAT
9 2RXP J155324.0+195826 15 53 23.95 +19 58 26.04 15.52 ROSAT
10 1WGA J1553.4+1957 15 53 25.99 +19 57 35.28 15.76 ROSAT
11 1RXS J155501.5+195704 15 55 01.51 +19 57 03.96 16.45 ROSAT

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 A1552+2020 15 54 18.79 +20 11 13.56 2.73 ZCAT
ROXASDC J155423.5+201117.3 15 54 23.50 +20 11 17.16 3.48 ROXA
PGC 1619415 15 54 23.90 +20 11 24.00 3.62 PGC2003
[ZEH2003] RX J1554.4+2011 1 15 54 24.00 +20 11 25.08 3.65 HRASSOPTID
QORG J155424.1+201124 15 54 24.10 +20 11 24.00 3.66 QORGCAT
1552+2020 15 54 23.21 +20 11 36.96 3.66 NORTH6CM
MS 15521+2020 15 54 24.10 +20 11 25.08 3.67 VERONCAT
MS 1552.1+2020 15 54 24.10 +20 11 25.08 3.67 XRAYSELBLL
2 NVSS J155424+201124 15 54 24.19 +20 11 24.00 3.67 NVSS
FIRST J155424.1+201125 15 54 24.10 +20 11 25.08 3.67 FIRST
[MML2015] 5BZB J1554+2011 15 54 24.10 +20 11 25.08 3.68 ROMABZCAT
TGSSADR J155424.1+201125 15 54 24.10 +20 11 25.08 3.68 GMRTAS150M
3 [ZEH2003] RX J1554.4+2011 2 15 54 26.21 +20 11 00.96 3.80 HRASSOPTID
GB6 J1554+2011 15 54 24.60 +20 11 36.96 3.89 GB6
4 FIRST J155429.9+200835 15 54 30.00 +20 08 35.88 4.04 FIRST
5 QORG J155432.6+200855 15 54 32.59 +20 08 54.96 4.65 QORGCAT
SDSS J15545+2008 15 54 34.51 +20 08 45.96 5.10 VERONCAT
6 FIRST J155350.8+200911 15 53 50.81 +20 09 11.16 5.17 FIRST
7 QORG J155352.2+201132 15 53 52.20 +20 11 31.92 5.51 QORGCAT
8 NVSS J155343+200818 15 53 43.20 +20 08 18.96 6.98 NVSS
9 NVSS J155344+200625 15 53 45.00 +20 06 25.92 6.98 NVSS
FIRST J155406.2+201604 15 54 06.19 +20 16 05.16 7.36 FIRST
10 NVSS J155405+201605 15 54 05.90 +20 16 05.16 7.38 NVSS
TGSSADR J155405.9+201606 15 54 05.90 +20 16 06.96 7.41 GMRTAS150M
FIRST J155405.7+201607 15 54 05.81 +20 16 06.96 7.42 FIRST
11 PGC 1622186 15 54 19.39 +20 16 12.00 7.48 PGC2003
12 QORG J155359.0+200154 15 53 58.99 +20 01 54.12 7.70 QORGCAT
13 FIRST J155444.9+201038 15 54 44.90 +20 10 37.92 7.74 FIRST
14 FIRST J155415.4+201647 15 54 15.41 +20 16 48.00 7.94 FIRST
15 FIRST J155345.7+201356 15 53 45.70 +20 13 57.00 8.12 FIRST
FIRST J155419.5+201652 15 54 19.51 +20 16 51.96 8.14 FIRST
QORG J155345.5+201356 15 53 45.50 +20 13 55.92 8.15 QORGCAT
16 NVSS J155418+201701 15 54 18.91 +20 17 00.96 8.26 NVSS
FIRST J155419.0+201703 15 54 19.01 +20 17 03.12 8.30 FIRST
FIRST J155418.6+201715 15 54 18.60 +20 17 16.08 8.48 FIRST
17 QORG J155330.8+200939 15 53 30.79 +20 09 38.88 9.89 QORGCAT
FIRST J155423.0+195859 15 54 23.11 +19 58 59.16 10.19 FIRST
18 NVSS J155423+195900 15 54 23.90 +19 58 59.88 10.22 NVSS
19 HR 5924 15 54 34.61 +20 18 38.88 11.02 BSC5P
QY Ser 15 54 34.61 +20 18 39.24 11.03 GCVS
HD 142574 15 54 34.63 +20 18 39.60 11.03 HIC
HIP 77902 15 54 34.66 +20 18 39.24 11.03 HIPPARCOS
PPM 104412 15 54 34.61 +20 18 39.60 11.03 PPM
SAO 84070 15 54 34.63 +20 18 39.60 11.04 SAO
FIRST J155352.7+201916 15 53 52.70 +20 19 17.04 11.41 FIRST
QORG J155352.9+201932 15 53 52.90 +20 19 32.16 11.63 QORGCAT
FIRST J155352.9+201932 15 53 52.99 +20 19 32.88 11.63 FIRST
20 NVSS J155353+201933 15 53 53.11 +20 19 33.96 11.63 NVSS
21 SDSS J15549+2014 15 54 58.20 +20 14 04.92 11.85 VERONCAT
22 QORG J155502.5+200324 15 55 02.50 +20 03 24.12 12.90 QORGCAT
PSS J1555+2003 15 55 02.50 +20 03 24.12 12.90 VERONCAT
23 FIRST J155330.6+200013 15 53 30.70 +20 00 12.96 13.15 FIRST
QORG J155330.5+200009 15 53 30.50 +20 00 09.00 13.23 QORGCAT
FIRST J155501.1+201634 15 55 01.10 +20 16 35.04 13.70 FIRST
TGSSADR J155501.0+201637 15 55 01.10 +20 16 36.84 13.71 GMRTAS150M
24 NVSS J155501+201636 15 55 01.20 +20 16 36.12 13.73 NVSS
FIRST J155500.9+201644 15 55 01.01 +20 16 45.12 13.77 FIRST
25 SDSS J15534+1958 15 53 24.31 +19 58 32.16 15.39 VERONCAT
QORG J155324.1+195832 15 53 24.10 +19 58 32.16 15.43 QORGCAT
26 PGC 1624516 15 54 56.40 +20 20 44.16 15.65 PGC2003

Penn State University Goddard Space Flight Center Swift