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 J1733.6-2431

Field

Detected Excesses

Swift-XRT image of the field for 4FGL J1733.6-2431 Swift-XRT detections in the field for 4FGL J1733.6-2431


No detected excesses found.

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 17 33 02.47 -24 35 08.86 8.27 (1.0 ± 0.5) x 10-2 6 2.210 2.183
2 17 32 56.62 -24 27 08.89 9.05 (8 ± 4) x 10-3 6 2.042 2.043

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 4FGL J1733.6-2431 Swift-XRT image with known radio, optical and UV sources for 4FGL J1733.6-2431

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 4XMMs J173350.9-242849 17 33 50.95 -24 28 49.44 3.14 XMM-NEWTON
4XMM J173351.0-242850 17 33 51.00 -24 28 50.16 3.14 XMM-NEWTON
2 4XMMs J173346.2-242803 17 33 46.30 -24 28 03.00 3.23 XMM-NEWTON
3 4XMM J173327.4-242618 17 33 27.43 -24 26 17.88 5.74 XMM-NEWTON
4 4XMM J173325.8-242511 17 33 25.82 -24 25 11.64 6.86 XMM-NEWTON
5 4XMMs J173313.9-242813 17 33 13.92 -24 28 13.44 6.87 XMM-NEWTON
4XMMs J173325.7-242510 17 33 25.70 -24 25 10.20 6.90 XMM-NEWTON
6 4XMMs J173312.0-242601 17 33 12.10 -24 26 01.68 8.36 XMM-NEWTON
4XMM J173312.0-242601 17 33 12.07 -24 26 01.32 8.37 XMM-NEWTON
7 Unknown 17 33 07.56 -24 26 56.76 8.73 EXOSAT
2RXP J173302.0-243510 17 33 01.94 -24 35 09.96 9.85 ROSAT
1WGA J1733.0-2435 17 33 01.80 -24 35 18.24 9.94 ROSAT
8 4XMM J173301.1-243504 17 33 01.18 -24 35 04.56 9.97 XMM-NEWTON
4XMMs J173301.1-243505 17 33 01.15 -24 35 05.28 9.98 XMM-NEWTON
9 4XMMs J173255.4-242704 17 32 55.42 -24 27 04.32 11.20 XMM-NEWTON
4XMM J173255.4-242703 17 32 55.44 -24 27 03.24 11.20 XMM-NEWTON
10 4XMM J173305.0-242251 17 33 04.99 -24 22 51.60 11.66 XMM-NEWTON
4XMMs J173304.9-242251 17 33 04.97 -24 22 51.96 11.66 XMM-NEWTON
11 4XMM J173301.5-242308 17 33 01.56 -24 23 08.16 12.04 XMM-NEWTON
4XMMs J173301.5-242308 17 33 01.56 -24 23 08.16 12.05 XMM-NEWTON
12 4XMMs J173257.0-242411 17 32 57.07 -24 24 11.16 12.21 XMM-NEWTON
4XMM J173257.0-242412 17 32 57.00 -24 24 12.24 12.21 XMM-NEWTON
13 2CXO J173300.1-241924 17 33 00.12 -24 19 24.96 14.97 CHANDRA
4XMM J173300.0-241924 17 33 00.07 -24 19 24.24 14.99 XMM-NEWTON
4XMMs J173300.3-241920 17 33 00.38 -24 19 20.64 14.99 XMM-NEWTON
4XMM J173300.4-241918 17 33 00.48 -24 19 18.12 15.01 XMM-NEWTON
14 4XMMs J173257.7-241940 17 32 57.74 -24 19 40.08 15.13 XMM-NEWTON
4XMM J173257.6-241938 17 32 57.86 -24 19 37.20 15.15 XMM-NEWTON
4XMM J173257.6-241938 17 32 57.29 -24 19 41.88 15.17 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J173355-242134 17 33 55.39 -24 21 33.84 10.03 NVSS
2 V2575 Oph 17 33 13.06 -24 21 07.20 11.86 GCVS
3 NVSS J173434-243302 17 34 34.10 -24 33 02.16 12.15 NVSS
4 PPM 266987 17 33 00.36 -24 19 23.88 14.95 PPM
CD-2413380 17 33 00.36 -24 19 23.88 14.95 ACRS
HD 158940 17 33 00.34 -24 19 23.52 14.96 HIC
SAO 185494 17 33 00.26 -24 19 23.88 14.96 SAO
HIP 85877 17 33 00.36 -24 19 22.44 14.97 HIPPARCOS

Penn State University Goddard Space Flight Center Swift