| Canonical Name: | HESS J1534-571 |
| TeVCat Name: | TeV J1534-571 |
| Other Names: | SNR G323.7-01.0 |
| Source Type: | Shell |
| R.A.: | 15 34 00 (hh mm ss) |
| Dec.: | -57 06 00 (dd mm ss) |
| Gal Long: | 323.65 (deg) |
| Gal Lat: | -0.92 (deg) |
| Distance: | |
| Flux: | (Crab Units) |
| Energy Threshold: | 1400 GeV |
| Spectral Index: | 2.51 |
| Extended: | Yes |
| Size (X): | 0.40 (deg) |
| Size (Y): | 0.40 (deg) |
| Discovery Date: | 2015-07 |
| 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 J1534-571 |
| Source Class: | SNR |
| Identified Object: | G323.7-01.0 |
| R.A. (J2000): | 233.68 deg (15 34 42) |
| Dec. (J2000): | -57.16 deg (-57 09 19) |
| Positional uncertainty: | 0.024 deg |
| Spatial Model: | Shell |
| Size: | 0.400 +/- 0.040 deg |
| Spectral Model: | power law |
| Integral Flux > 1 TeV: | 1.98e-12 +/- 2.31e-13 cm-2 s-1 |
| Pivot Energy, E0: | 1.00 TeV |
| Diff. Flux at E0: | 2.99e-12 +/- 3.00e-13 cm-2 s-1 TeV-1 |
| Spectral Index: | 2.51 +/- 0.09 |
| HGPS Source Notes: | |
| | |
This is one of the 31 firmly-identified objects among the HGPS sources. One possible association is 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":
- G323.7−1.0 (SNR)
This detection was announced by
Puehlhofer et al.
(2015) at the 34th ICRC.
This source was moved (tardively) from the Newly Announced to the Default catalogue on 190301.
Source position:
From
Gottschall et al. (2016):
- l: 323.70 deg +/- 0.02 deg
- b: -1.02 deg +0.03 deg -0.02 deg
From
Puehlhofer et al. (2015):
- "The name of the H.E.S.S. source (HESS J1534-571) has been chosen to
match the centroid coordinates of the shell."
- the position quoted in TeVCat is thus:
- R.A. (J2000): 15h 34m +/- 30s
- Dec. (J2000): -57d 06' +/- 30"
The galactic coordinates for the shell-like source quoted are:
- l approx 323.6 deg
- b approx -1.0 deg
Source Extension:
From
H.E.S.S. Collaboration (2018):
- inner shell: 0.28 +0.06 -0.03 deg
- outer shell: 0.40 +0.04 -0.12 deg
- these are the reults of fitting a homogeneously emitting spherical shell.
- this source was found to be consistent with having a flat azimuthal
profile (i.e. a shell of gamma-ray emission as opposed to a Gaussian
distribution of emission).
From
Gottschall et al. (2016):
- R_in and R_out are the inner and outer radii of the homogeneously
emitting spherical shell
- R_in: 0.28 deg +0.06 deg -0.03 deg
- R_out: 0.40 deg +0.04 deg -0.12 deg
Spectral Information:
From
H.E.S.S. Collaboration (2018):
- the spectrum fitted was of the form: dN/dE = N0 (E/E0)^-A
- E_min: 0.42 TeV
- E_max: 61.90 TeV
- E0: 1.40 TeV
- N0: 1.29 +/- 0.12 (stat) +/- 0.39 (syst) x10e-12 cm-2 s-1 TeV-1
- A: 2.51 +/- 0.09 (stat) +/- 0.20 (syst)
From
Gottschall et al. (2016):
- Spectrum fitted between 0.422 and 61.897 TeV
- Spectral index: 2.51 +/- 0.09 (stat) +/- 0.20 (syst)
From
Puehlhofer et al. (2015):
- a prelimnary spectral analysis gives a spectral index of 2.3
Distance:
From
H.E.S.S. Collaboration (2018):
- "The TeV data do not permit a distance estimate to HESS J1534-571."
- "Using the SNR radio surface brightness to diameter (Σ - D)
relation, the distance to G323.7-1.0 is estimated to be 20
kpc. However, individual distances derived from Σ - D have large
errors, which are typically 40% for the normal SNR population.
Assuming that the radio counterpart of HESS J1534-571 is similarly
underluminous as that of RX J1713.7-3946 with respect to its Σ - D
expectation value at 1 kpc would reduce the distance estimate of
G323.7-1.0 to ∼5 kpc. This distance would imply a TeV luminosity of
HESS J1534-571 in reasonable agreement with TeV luminosities from the
other known TeV SNRs."
From
Maxted et al. (2018):
- "Little is known about its distance and local environment. We
examine Mopra 12CO/13CO(1-0) data, Australian Telescope Compact Array
HI, and Parkes HI data towards HESS J1534-571. We trace molecular
clouds in at least five velocity ranges, including clumpy interstellar
medium structures near a dip in HI emission at a kinematic velocity
consistent with the Scutum-Crux arm at ~3.5 kpc. This feature may be a
cavity blown-out by the progenitor star, a scenario that suggests
HESS J1534-571 resulted from a core-collapse event. By employing
parametrisations fitted to a sample of supernova remnants of known
distance, we find that the radio continuum brightness of HESS J1534-571
is consistent with the ~3.5 kpc kinematic distance of the Scutum-Crux
arm HI dip. Modelling of the supernova evolution suggests an ~8-24 kyr
age for HESS J1534-571 at this distance."
Source Association:
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:
- "A radio SNR candidate has been identified to be a counterpart to
HESS J1534-571. The TeV source is therefore classified as a SNR."
From
Araya 2017:
- This paper reports on "the detection of a new GeV source using data
from the Fermi satellite that is compatible in extension with
the radio supernova remnant and shows a very hard power-law spectrum"
- The author shows that "leptonic emission is compatible with the
known multiwavelength data and a corresponding set of physical source
parameters is given."
- "The new GeV observations imply that a hadronic scenario, on the
other hand, requires a cosmic ray spectrum that deviates considerably
from theoretical expectations of particle acceleration."
From
Gottschall et al. (2016):
-"HESS J1534-571 was associated with the radio SNR candidate
G323.7-1.0, and thus is classified as an SNR."
From
Puehlhofer et al. (2015):
- "the newly detected radio SNR candidate
G323.7-1.0 is in very good
positional agreement with the H.E.S.S. source"
Seen by: H.E.S.S.
-
Electron Acceleration in Middle-age Shell-type Gamma-Ray Supernova Remnants
Zhang, Xiao and Liu, Siming, ApJ 876 p24 (2019) [LINK]
-
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]
-
Searching for an interstellar medium association for HESS J1534-571
Maxted, N.I. et al., ArXiv e-prints p (2018) [LINK]
-
Detection of GeV Gamma-rays from HESS J1534-571 and Multiwavelength Implications for the Origin of the Non-thermal Emission
Araya, M., ArXiv e-prints p (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]
-
Search for new supernova remnant shells in the Galactic plane with H.E.S.S
Puehlhofer, G. et al., ArXiv e-prints p (2015) [LINK]
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