| Canonical Name: | HESS J1614-518 |
| TeVCat Name: | TeV J1614-518 |
| Other Names: | 3FGL J1615.3-5146e |
| Source Type: | Shell |
| R.A.: | 16 14 19.2 (hh mm ss) |
| Dec.: | -51 49 12 (dd mm ss) |
| Gal Long: | 331.52 (deg) |
| Gal Lat: | -0.58 (deg) |
| Distance: | |
| Flux: | 0.25 (Crab Units) |
| Energy Threshold: | 200 GeV |
| Spectral Index: | 2.46 |
| Extended: | Yes |
| Size (X): | 0.23 (deg) |
| Size (Y): | 0.15 (deg) |
| Discovery Date: | 2005-03 |
| 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 J1614-518 |
| Source Class: | Unid |
| Identified Object: | None |
| R.A. (J2000): | 243.54 deg (16 14 10) |
| Dec. (J2000): | -51.87 deg (-51 52 03) |
| Positional uncertainty: | 0.010 deg |
| Spatial Model: | Shell |
| Size: | 0.420 +/- 0.010 deg |
| Spectral Model: | power law |
| Integral Flux > 1 TeV: | 5.87e-12 +/- 4.25e-13 cm-2 s-1 |
| Pivot Energy, E0: | 1.00 TeV |
| Diff. Flux at E0: | 8.33e-12 +/- 4.90e-13 cm-2 s-1 TeV-1 |
| Spectral Index: | 2.42 +/- 0.06 |
| HGPS Source Notes: | |
| | |
"This is one of the fourteen EXTERN sources in the HGPS catalog, i.e., VHE sources in the HGPS region previously detected by H.E.S.S. that were not reanalyzed
in the paper:"
- "Given the difficulties with modeling complex source morphologies, we decided to restrict the HGPS analyses to a symmetrical Gaussian model assumption and
exclude all firmly identified shell-like sources and the very complex GC region from reanalysis."
- HESS J1614-518 is described as an " SNR candidate" with a shell-type morphology in the HGPS paper.
Three 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":
- Suzaku J1614−5141 (EXTRA)
- 2FHL J1615.3−5146e (2FHL)
- 3FGL J1615.3−5146e (3FGL)
"EXTRA associations: For completeness, in addition to the associations obtained through the catalog-based, automatic procedure, we add a list of 20 extra
associated objects that are plausible counterparts for some HGPS sources and are not covered by the limited set of catalogs we use."
Source position:
From
Gottschall et al. (2016):
- l: 331.47 deg +/- 0.01 deg
- b: -0.60 deg +/- 0.01 deg
From
Aharonian et al. (2006):
- l: 331.52 +/- 0.03 (deg)
- b: -0.58 +/- 0.02 (deg)
- R.A. (deg): 243.58 (Convert to HMS: 16 14 19.2)
- Dec. (deg): -51.82 (Convert to HMS: -51 49 12)
Source Extent:
From
Gottschall et al. (2016):
- R_in and R_out are the inner and outer radii of the homogeneously
emitting spherical shell
- R_in: 0.18 deg +/- 0.02 deg
- R_out: 0.42 deg +/- 0.01 deg
From
Aharonian et al. (2006):
- semi-major axis: 14' +/- 1' (= 0.23 +/- 0.02 deg)
- semi-minor axis: 9' +/- 1' (= 0.15 +/- 0.02 deg)
- angle counterclockwise wrt the positive Gal. Lat. axis 49 +/- 10 (deg)
Spectral Properties:
From
Gottschall et al. (2016):
- Spectrum fitted between 0.316 and 38.312 TeV
- Spectral index: 2.42 +/- 0.06 (stat) +/- 0.20 (syst)
Source Association:
On 161213 the source class was updated from a Massive Star Cluster to a Shell-type SNR
Note that
Lau et al. (2017) as well as
H.E.S.S. Collaboration (2018)
consider it to be a SNR candidate.
From
H.E.S.S. Collaboration (2018):
- A search for new supernova remnants in the gamma-ray data from the
H.E.S.S. Galactic plane survey was undertaken using shell morphologies
as an identifier. Extensive multiwavelength searches were also undertaken
to search for counterparts. No identifying counterpart was found for
HESS J1614-518 so it remains a SNR candidate.
From
Lau et al. (2017):
- In this paper, the interstellar medium in the direction of HESS J1614-518
and HESS J1616-508 is studied in detail using "results from
a 7 mm-wavelength Mopra study, the Mopra Southern Galactic Plane CO
Survey, the Millimetre Astronomer's Legacy Team - 45 GHz survey and
[CI] data from the HEAT telescope"
- Several origin scenarios for the TeV gamma rays from these two HESS
sources are discussed but no "strong convincing evidence linking any
counterpart with HESS J1614−518 or HESS J1616−508" is found.
- "As no evidence of an associated SNR has been seen so far in other
wavelengths, HESS J1614-518 is currently considered a SNR candidate."
- "For HESS J1614-518, we find that the scenario involving an
as-of-yet undetected SNR, potentially associated with the X-ray
sources Suzaku Src A and XMMNewton Src B1, could generate the observed
TeV gamma rays in a hadronic interaction scenario."
From
Gottschall et al. (2016):
- they identify this source as having a shell morphology and classify
it as an SNR candidate
- it does not have a radio or X-ray counterpart that would permit it
to be firmly identified as an SNR
From
Acero et al. (2013):
- this source has a relatively hard spectrum at LAT energies that
connects spectrally to the associated VHE source.
From
Sakai et al. (2011):
- they report on observations of this source with Suzaku and
XMM-Newton. In has two regions with intense gamma-ray emission. No
X-ray counterpart was found at the position of the 2nd brightest peak
of the TeV gamma-ray emission; A sofr X-ray source Suzaku J1614−5152
was detected at the middle of HESS J1614-518 - it consists of multiple
point sources. The high value of f_TeV/f_X found may suggest that HESS
J1614 is a proton accelerator.
- in summary, two X-ray counterparts were found and a SNR
identification proposed (
Acero et al. (2013))
From
de Naurois (2011):
- they mention a massive star cluster as a possible association
From
Ohm et al. (2009):
- they suggest that this source is associated with the open stellar cluster, Pismis 22.
From
Rowell et al. (2008):
- this source is spatially coincident with 5 detected pulsars but none
is luminous enough to power a PWN that would explain the gamma-ray
emission
- a connection with the highly reddended open cluster Pismis 22 is discussed
Seen by: H.E.S.S.
-
A search for new supernova remnant shells in the Galactic plane with H.E.S.S.
H.E.S.S. Collaboration et al., ArXiv e-prints p (2018) [LINK]
-
Chandra Observations of the field containing HESS J1616-508
Hare, J. et al., ArXiv e-prints p (2017) [LINK]
-
A study of the interstellar medium towards the unidentified dark TeV gamma-ray sources HESS J1614-518 and HESS J1616-508
Lau, J.C. et al., ArXiv e-prints p (2017) [LINK]
-
Dense molecular gas at 12 mm towards Galactic TeV gamma-ray sources
de Wilt, P. et al., MNRAS 468 p2093-2113 (2017) [LINK]
-
Discovery of new TeV supernova remnant shells in the Galactic plane with H.E.S.S
Gottschall, D. et al., ArXiv e-prints p (2016) [LINK]
-
Constraints on the Galactic Population of TEV Pulsar Wind Nebulae Using Fermi Large Area Telescope Observations
Acero, F. et al., ArXiv e-prints p (2013) [LINK]
-
MALT-45: The Galactic plane in 7mm
Jordan, Christopher et al., Protostars and Planets VI Posters (2013) [LINK]
-
Nature of the Unidentified TeV Source HESS J1614-518, Revealed by Suzaku and XMM-Newton Observations
Sakai, M. et al., ArXiv e-prints p (2011) [LINK]
-
H.E.S.S. observations of massive stellar clusters
Ohm, S. et al., ArXiv e-prints p (2009) [LINK]
-
A Closer Look at the Unidentified TeV Source HESS J1614-518
Rowell, G. et al., 1085 p241-244 (2008) [LINK]
-
Discovery of Extended X-Ray emission from the unidentified TeV source HESS J1614-518 using the Suzaku Satellite
Matsumoto, H. et al., ArXiv e-prints 712 p (2007) [LINK]
-
The H.E.S.S. Survey of the Inner Galaxy in Very High Energy Gamma Rays
Aharonian, F. et al., ApJ 636 p777-797 (2006) [LINK]
-
A New Population of Very High Energy Gamma-Ray Sources in the Milky Way
Aharonian, F. et al., Science 307 p1938-1942 (2005) [LINK]
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