| Canonical Name: | CTB 37A |
| TeVCat Name: | TeV J1714-385 |
| Other Names: | HESS J1714-385,
SNR G348.5+0.1 |
| Source Type: | SNR/Molec. Cloud |
| R.A.: | 17 14 15 (hh mm ss) |
| Dec.: | -38 31 27 (dd mm ss) |
| Gal Long: | 348.42 (deg) |
| Gal Lat: | 0.14 (deg) |
| Distance: | 7.9 kpc |
| Flux: | 0.03 (Crab Units) |
| Energy Threshold: | 1000 GeV |
| Spectral Index: | 2.3 |
| Extended: | No |
| Discovery Date: | 2008-11 |
| Discovered By: | H.E.S.S. |
| TeVCat SubCat: | Default Catalog |
Source Notes:
| H.E.S.S. Galactic Plane Survey (HGPS, 2018): |
| A selection of information for each of the 78 sources in the HGPS is provided in TeVCat. For full details, visit the HGPS website. |
| Name: | HESS J1714-385 |
| Source Class: | Composite |
| Identified Object: | CTB 37A |
| R.A. (J2000): | 258.56 deg (17 14 15) |
| Dec. (J2000): | -38.52 deg (-38 31 27) |
| Positional uncertainty: | 0.024 deg |
| Spatial Model: | Gaussian |
| Size: | N/A |
| Spectral Model: | power law |
| Integral Flux > 1 TeV: | 2.05e-13 +/- 2.69e-14 cm-2 s-1 |
| Pivot Energy, E0: | 1.05 TeV |
| Diff. Flux at E0: | 2.76e-13 +/- 3.05e-14 cm-2 s-1 TeV-1 |
| Spectral Index: | 2.52 +/- 0.12 |
| HGPS Source Notes: | |
| | |
This is one of the 31 firmly-identified objects among the HGPS sources. Two possible associations are listed in Table A.9. "This is a
list of astronomical objects, extracted from catalogs of plausible counterparts, which are are found to be spatially coincident with the HGPS source":
- 3FGL J1714.5−3832 (3FGL)
- G348.5+0.1 (COMP)
Three sources were found in the HGPS that are compatible with a point-like source, which were previously found to be extended, including HESS J1714-385:
- "For HESS J1714−385 we found a size of 0.034 +/-0.011 deg compared to 0.067 +/- 0.017 deg in Aharonian et al. (2008). With the current analysis, a smaller
size was found because underlying emission was modeled by separate emission components."
Source position and its uncertainty:
Source position and its uncertainty:
On 191024 the source position was updated from that given in
Aharonian et al (2008)
to that in
H.E.S.S. Collaboration (2018).
From
H.E.S.S. Collaboration (2018):
- R.A. (J2000): 17 14 15
- Dec. (J2000): -38 31 27
- Positional uncertainty:0.024 deg
From
Aharonian et al (2008):
- R.A. (J2000): 17h 14m 19s +/- 1m20s
- Dec. (J2000): -38d 34' 00'' +/- 1'20''
Source Extent:
On 191024 the source was updated to a point source based on the analysis of
H.E.S.S. Collaboration (2018):
From
H.E.S.S. Collaboration (2018):
"For HESS J1714−385 we found a size of 0.034 +/-0.011 deg compared to
0.067 +/- 0.017 deg in
Aharonian et al. (2008). With
the current analysis, a smaller size was found because underlying
emission was modeled by separate emission components."
From
Aharonian et al (2008):
- radius: 4' +/- 1' (= 0.067 +/- 0.017 deg)
Source Association:
This VHE gamma-ray source is a counterpart candidate for the
unidentified EGRET source 3EG J1714-3857 and also for the Fermi
source 1FGL J1714.5-3830
From
Maxted et al. (2013):
- "We present CO(2-1) and CS(1-0) emission maps of a region
encompassing the CTB 37A TeV gamma-ray emission, HESS J1714-385,
revealing regions of dense gas within associated molecular
clouds. Some gas displays good overlap with gamma-ray emission,
consistent with hadronic gamma-ray emission scenarios."
Distance:
The mean value (7.9 kpc) from
Tian & Leahy(2012) is quoted here.
From
Tian & Leahy (2012):
- "We revise the kinematic distance for CTB 37A to be in the
range 6.3 to 9.5 kpc (previously ~11.3 kpc)..."
From
Aharonian et al (2008):
- "A constraint on the distance is obtained from neutral hydrogen
absorption and gives 10.3 +/- 3.5 kpc (
Caswell et al. 1975)"
Seen by: H.E.S.S.
-
On the Origin of the Gamma-Ray Emission toward SNR CTB 37A with Fermi-LAT
Abdollahi, Soheila et al., arXiv e-prints parXiv:2006.05731 (2020) [LINK]
-
Dense molecular gas at 12 mm towards Galactic TeV gamma-ray sources
de Wilt, P. et al., MNRAS 468 p2093-2113 (2017) [LINK]
-
Evolution of High-Energy Particle Distribution in Mature Shell-Type Supernova Remnants
Zeng, H. et al., ArXiv e-prints p (2016) [LINK]
-
A statistical study of Galactic SNR source spectra detected at >GeV energies
Mandelartz, M. and Becker Tjus, J., ArXiv e-prints p (2013) [LINK]
-
A view of supernova remnant CTB 37A with the Fermi Gamma-ray Space Telescope
Brandt, T. & Fermi-LAT Collaboration, Advances in Space Research 51 p247-252 (2013) [LINK]
-
Interstellar gas towards CTB 37A and the TeV gamma-ray source HESS J1714-385
Maxted, N.I. et al., ArXiv e-prints p (2013) [LINK]
-
Distances of the TeV SNR complex CTB 37 towards the Galactic Bar
Tian, W. and Leahy, D., ArXiv e-prints p (2012) [LINK]
-
Gamma Rays from Cosmic Rays in Supernova Remnants
Dermer, C.D. and Powale, G., ArXiv e-prints p (2012) [LINK]
-
Unified model for the gamma-ray emission of supernova remnants
Yuan, Q. et al., ArXiv e-prints p (2012) [LINK]
-
Gamma-rays from molecular clouds illuminated by accumulated diffusive protons. II: interacting supernova remnants
Li, H. and Chen, Y., ArXiv e-prints p (2011) [LINK]
-
Fermi Large Area Telescope Observations of Supernova Remnants Interacting with Molecular Clouds
Castro, D. and Slane, P., ApJ 717 p372-378 (2010) [LINK]
-
Discovery of a VHE gamma-ray source coincident with the supernova remnant CTB 37A
Aharonian, F. et al., A&A 490 p685-693 (2008) [LINK]
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