| Canonical Name: | MAGIC J1857.6+0297 |
| TeVCat Name: | TeV J1857+029 |
| Other Names: | HESS J1857+026
1HWC J1857+023
2HWC J1857+027 |
| Source Type: | UNID |
| R.A.: | 18 57 35.6 (hh mm ss) |
| Dec.: | +02 58 02 (dd mm ss) |
| Gal Long: | 36.27 (deg) |
| Gal Lat: | -0.02 (deg) |
| Distance: | |
| Flux: | (Crab Units) |
| Energy Threshold: | 1000 GeV |
| Spectral Index: | |
| Extended: | No |
| Discovery Date: | 2014-11 |
| Discovered By: | MAGIC |
| TeVCat SubCat: | Default Catalog |
Source Notes:
This source and
MAGIC J1857.2+0263 form part of a two-source scenario
that the MAGIC data favour for
HESS J1857+026
Source Position:
From
Aleksic et al. (2014):
- R.A. (J2000): 18h 57m 35.6s +/- 5.2s(stat) +/- 10.8s(syst)
- Dec. (J2000): 02d 58' 02" +/- 56"(stat) +/- 3'(syst)
Source extent:
From
Aleksic et al. (2014):
- this source is compatible with a point source
Flux:
From
Aleksic et al. (2014):
- the differential flux is approximately 20% of the total differential
flux measued by MAGIC at 1 TeV for
HESS J1857+026
Source Associtaion:
From
Aleksic et al. (2014):
-"We have used archival multiwavelength data at radio and infra-red
wavelengths to search for possible counterparts of MAGIC
J1857.6+0297. We found a possible association with an ultra-compact
HII region located at 3.7 kpc and its neighboring molecular
clouds. The morphology of molecular gas in this re- gion suggests that
a cavity or wind-blown bubble may be present just behind the HII
region and in the same direction as the peak of the VHE emission. "
From
Abeysekara et al. (2015):
- "The source 1HWC J1857+023* is detected at 6.2sigma post trials and
is approx. 0.4deg away from both
HESS J1857+026 and
HESS J1858+020.
... The flux of
HESS J1857+026 is approximately an order of
magnitude higher than
HESS J1858+020, and the differential flux
normalization from 1HWC J1857+023 is compatible with the combined flux
of
HESS J1857+026 and
HESS J1858+020"
*1HWC J1857+023 is not listed under a separate entry in TeVCat. It is
listed as an associated source for
HESS J1857+026,
HESS J1858+020,
MAGIC J1857.2+0263 and MAGIC J1857.6+0297.
Seen by: H.E.S.S., MAGIC, HAWC
-
Using Interstellar Clouds to Search for Galactic PeVatrons: Gamma-ray Signatures from Supernova Remnants
Mitchell, A.M.W. et al., arXiv e-prints parXiv:2103.01787 (2021) [LINK]
-
MAGIC reveals a complex morphology within the unidentified gamma-ray source HESS J1857+026
MAGIC Collaboration et al., A&A 571 pA96 (2014) [LINK]
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