| Canonical Name: | HESS J1018-589 A |
| TeVCat Name: | TeV J1018-589 |
| Other Names: | Carina Arm region
SNR G284.3−1.8
MSH 10−53
1FGL J1018.6-5856
|
| Source Type: | Binary |
| R.A.: | 10 18 58 (hh mm ss) |
| Dec.: | -58 56 43 (dd mm ss) |
| Gal Long: | 284.36 (deg) |
| Gal Lat: | -1.69 (deg) |
| Distance: | |
| Flux: | 0.01 (Crab Units) |
| Energy Threshold: | 1000 GeV |
| Spectral Index: | 2.2 |
| Extended: | No |
| Discovery Date: | 2010-08 |
| 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 J1018-589 A |
| Source Class: | Binary |
| Identified Object: | 1FGL J1018.6-5856 |
| R.A. (J2000): | 154.75 deg (10 18 59) |
| Dec. (J2000): | -58.93 deg (-58 55 54) |
| Positional uncertainty: | 0.017 deg |
| Spatial Model: | Gaussian |
| Size: | N/A |
| Spectral Model: | power law |
| Integral Flux > 1 TeV: | 2.12e-13 +/- 3.19e-14 cm-2 s-1 |
| Pivot Energy, E0: | 2.26 TeV |
| Diff. Flux at E0: | 4.22e-14 +/- 6.34e-15 cm-2 s-1 TeV-1 |
| Spectral Index: | 2.24 +/- 0.13 |
| 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 J1018.9−5856 (3FGL)
- G284.3−1.8 (SNR)
On 150324, the source HESS J1018-589 was split into two: HESS J1018-589 A and
HESS J1018-589 B
This is the H.E.S.S. Source of the Month for
August 2010
Source Position and its Uncertainty:
From
H.E.S.S. Collaboration (2015):
- R.A. (J2000): 10h 18m 58s +/- 5s
- Dec. (J2000): -58d 56' 43" +/-30"
From
HESS Collaboration (2012):
Location A (point source):
- R.A. (J2000): 10h 18m 59.3s +/- 2.4s(stat) +/- 20"(syst)
- Dec. (J2000): -58d 56' 10" +/- 36"(stat) +/- 20"(syst)
Combined location (A & B):
- R.A. (J2000): 10h 17m 45.6s
- Dec. (J2000): -59d 00' 00"
Source Extent:
From
H.E.S.S. Collaboration (2015):
- "The fitted extension is compatible with the H.E.S.S. point spread
function (PSF, estimated to have a mean 68% containment radius of
∼0.1deg)."
From
HESS Collaboration (2012):
- Location A: compatible with a point source
- Combined region (A & B): radius: 0.30deg
Spectral Information:
From
H.E.S.S. Collaboration (2015):
- Spectral index: 2.20 +/- 0.14(stat) +/- 0.2(syst)
From
HESS Collaboration (2012):
- Spectral index for the point source (location A): 2.7 +/- 0.5(stat) +/- 0.2(syst)
Source Association:
130802: Updated source class form UNID to Binary
From
Strader et al. (2015):
Optical spectroscopy was used to try to determine the nature of the
primary - a neutron star or a black hole:
"We find that the secondary has a low radial velocity semi-amplitude
of 11-12 km/s, with consistent values obtained for H and He absorption
lines. This low value strongly favors a neutron star primary: while a
black hole cannot be excluded if the system is close to face on, such
inclinations are disallowed by the observed rotation of the
secondary. "
From
H.E.S.S. Collaboration (2015):
- "Re-observations with the H.E.S.S. telescope array of the
very-high-energy (VHE) source HESS J1018–589 A coincident with the
Fermi-LAT gamma-ray binary 1FGL J1018.6–5856 have resulted in a source
detection significance of more than 9sigma, and the detection of
variability in the emitted gamma-ray flux. This variability confirms
the association of HESS J1018–589 A with the high-energy gamma-ray
binary detected by Fermi-LAT, and also confirms the point-like source
as a new very-high-energy binary system."
- "Variability is clearly detected in the night-by-night
lightcurve. When folded on the orbital period of 16.58 days, the
rebinned lightcurve peaks in phase with the observed X-ray and
high-energy phaseograms. The fit of the H.E.S.S. phaseogram to a
constant flux provides evidence of periodicity at the level of >
3sigma"
From
Dubus, G. (2013):
- "1FGLJ1018.6-5856 is associated with HESSJ1018-589
(
H.E.S.S Collaboration (2012)). The VHE source is decomposed into a
point source (A) and a source (B) with an extension of 0.15 ±
0.03deg. The position of the VHE point source (A) is compatible with
the GeV, X-ray, optical and radio sources associated with the
binary. The best fit VHE spectrum is a power-law with a photon index ~
2.4 and a normalisation at 1 TeV of 3.2 × 10−13 TeV−1 cm−2 s−1.
Significant variability is detected in the (sparsely distributed)
VHE observations, formally associating the VHE source with the
binary. When folded and rebinned on the known 16.58 d period, the VHE
lightcurve is modulated in phase with the 1-10 GeV folded lightcurve
measured with the Fermi/LAT (H.E.S.S. collaboration, 2013, in prep.)."
From
Bordas et al. (2013):
- "The Fermi-LAT collaboration has recently reported on the detection
of the new gamma-ray binary candidate 1FGLJ1018.6–5856 " ... "No flux
variability could be derived in the 2007–2009 (H.E.S.S.) data. To
further search for VHE variability/periodicity, new
H.E.S.S. observations were performed in 2011-2012, improving the
sampling of the system orbital phases. First evidences of flux
variability have been found when these new data are included in the
analysis. A detailed report on these results as well as a study on the
VHE emission and absorption mechanisms at work in the source is in
preparation.
From
Acero et al. (2013):
- in the LAT energy range, this source is point-like with a relatively soft spectrum
- this source "is close to both the gamma-ray binary 1FGL J1018.6-5856
and the nearby SNR G284.3-1.8 The LAT source appears to be spatially
coincident with SNR G284.3−1.8. SNR G284.3−1.8 is not included in our
list of candidates and will be analyzed in the SNR catalog*"
(*currently in preparation by the LAT Collaboration).
From
HESS Collaboration (2012):
- "The complex VHE morphology and faint VHE emission prevent a
unequivocal identification of the source given the presence of several
possible counterparts."
- Counterparts considered include:
- a SNR/Molecular Cloud scenario
- a binary (1FGL J1018.6–5856 is a binary)
- energetic pulsar PSR J1016–5857 and its X-ray nebula
- shock heated interstellar matter behind the brightest synchrotron
part of the radio shell of SNR G284.3–1.8 associated with XMMU
J101855.4–58564
From
H.E.S.S. SOM 2010/08:
- "The emission region coincides partly with the supernova remnant shell
SNR G284.3-1.8 and with the pulsar PSR J1016-5857. G284.3-1.8 is an incomplete
radio shell
(Milne et al. 1989) interacting with molecular clouds
(Riuz & May 1986)."
Seen by: H.E.S.S.
-
3D RMHD simulations of the Gamma-ray binaries
Barkov, Maxim V. et al., arXiv e-prints parXiv:2211.12053 (2022) [LINK]
-
Relativistic fluid modelling of gamma-ray binaries. I. The model
Huber, D. et al., A&A 646 pA91 (2021) [LINK]
-
Gamma-ray binaries
Chernyakova, Maria and Malyshev, Denys, arXiv e-prints parXiv:2006.03615 (2020) [LINK]
-
Search for PeV Gamma-Ray Emission from the Southern Hemisphere with 5 Yr of Data from the IceCube Observatory
Aartsen, M.G. et al., ApJ 891 p9 (2020) [LINK]
-
Refining the origins of the gamma-ray binary 1FGL J1018.6-5856
Marcote, B. et al., ArXiv e-prints p (2018) [LINK]
-
The orbit of the gamma-ray binary 1FGL J1018.6-5856
Monageng, I. et al., ArXiv e-prints p (2017) [LINK]
-
High-energy emissions from the gamma-ray binary 1FGL J1018.6-5856
Chen, A.M. et al., ArXiv e-prints p (2017) [LINK]
-
Light curve and SED modeling of the gamma-ray binary 1FGL J1018.6$-$5856: constraints on the orbital geometry and relativistic flow
An, H. and Romani, R.W., ArXiv e-prints p (2017) [LINK]
-
Optical spectroscopy of the high-mass gamma-ray binary 1FGL J1018.6-5856: A probable neutron star primary
Strader, J. et al., ArXiv e-prints p (2015) [LINK]
-
Magnesium-rich Ejecta in the SNR G284.3-1.8 Around the High-Mass Gamma-Ray Binary 1FGL J1018.6-5856
Williams, B.J. et al., ArXiv e-prints p (2015) [LINK]
-
Broadband X-ray Properties of the Gamma-ray Binary 1FGL J1018.6-5856
An, H. et al., ArXiv e-prints p (2015) [LINK]
-
Echelle Spectroscopy of gamma-ray binary 1FGL J1018.6-5856
Waisberg, I.R. and Romani, R.W., ArXiv e-prints p (2015) [LINK]
-
Discovery of variable VHE gamma-ray emission from the binary system 1FGL J1018.6-5856
H.E.S.S. Collaboration et al., ArXiv e-prints p (2015) [LINK]
-
Gamma-ray binaries and related systems
Dubus, G., ArXiv e-prints p (2013) [LINK]
-
Observations of TeV binary systems with the H.E.S.S. telescope
Bordas, P. et al., ArXiv e-prints p (2013) [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]
-
Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856
The Fermi LAT Collaboration et al., ArXiv e-prints p (2012) [LINK]
-
Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS J1018-589
HESS Collaboration, ArXiv e-prints p (2012) [LINK]
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