| Canonical Name: | 2HWC J1837-065 |
| TeVCat Name: | TeV J1837-065 |
| Other Names: | HESS J1837-069
HESS J1841-055
eHWC J1839-057 |
| Source Type: | UNID |
| R.A.: | 18 37 26.4 (hh mm ss) |
| Dec.: | -06 34 48 (dd mm ss) |
| Gal Long: | 25.48 (deg) |
| Gal Lat: | 0.10 (deg) |
| Distance: | |
| Flux: | (Crab Units) |
| Energy Threshold: | 7000 GeV |
| Spectral Index: | 2.9 |
| Extended: | No |
| Discovery Date: | 2017-02 |
| Discovered By: | HAWC |
| TeVCat SubCat: | Default Catalog |
Source Notes:
Source Position:
From
Abeysekara et al. (2017):
- R.A. (J2000): 279.36 deg (= 18h 37m 26.4s)
- Dec. (J2000): -6.58 deg (= -06d 34' 48'')
- the statistical uncertainty on the position is 0.06 deg
- the systematic uncertainty on the position is 0.1 deg
Source Notes:
From
Abeysekara et al. (2017):
- 2HWC J1837-069 is the brightest source found in the sky at 7 TeV in
the HAWC 2nd catalogue - this is when the extent of the source is also
taken into account
Source Extent:
From
Abeysekara et al. (2017):
- "This source is found in the point search with a TS value of 549."
Spectral Properties:
From
Abeysekara et al. (2017):
- spectral index: 2.90 +/- 0.04(stat) +/- 0.2(syst) - point-source assumption
- spectral index: 2.66 +/- 0.03(stat) +/- 0.2(syst) - 2.0deg radius assumption
Source Association:
From
Cao et al. (2021):
- 2HWC J1837-065 may be associated with
LHAASO J1839-0545
From
Abeysekara et al. (2017):
- 2HWC J1837-065 is the principal maximum of an elongated region
containing multiple known extended sources which are not resolved in
the present analysis. It may be associated with the close by TeV
source
HESS J1837-069 (distance of approx. 0.4 deg )."
- This elongated HAWC region also covers the location of the unidentified
H.E.S.S. source
HESS J1841-055 which is a very complex TeV
gamma-ray source with many potential counterparts, including two SNRs,
three high spindown pulsars, and an X-ray binary."
- "This HAWC region will be studied further in a dedicated analysis."
Emission above 56 GeV:
From
HAWC Collaboration (2019):
- This source overlaps with eHWC J1839-057 one of nine sources in the
first catalog of gamma-ray sources emitting above 56 TeV presented by
the HAWC Collaboration
- The properties given in the eHWC catalog are the following:
... Source name: eHWC J1839-057
... R.A. (deg): 279.77 +/- 0.12
... Dec. (deg): -5.71 +/- 0.10
... Extension > 56 TeV (deg): 0.34 +/- 0.08
... F (10e-14 ph cm-2 s-1): 1.5 +/- 0.3
... sqrt(TS) > 56 TeV: 7.03
... Nearest 2HWC source: J1837-065
... Distance to 2HWC source (deg): 0.96
... sqrt(TS) > 100 TeV: 3.06
Seen by: HAWC
-
Ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 gamma-ray Galactic sources
Cao, Z., Aharonian, F.A., An, Q., et al., Nature 594 p33-36 (2021) [LINK]
-
Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC
HAWC Collaboration et al., arXiv e-prints parXiv:1909.08609 (2019) [LINK]
-
The 2HWC HAWC Observatory Gamma-Ray Catalog
Abeysekara, A.U. et al., ApJ 843 p40 (2017) [LINK]
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