| Canonical Name: | MGRO J2031+41 |
| TeVCat Name: | TeV J2031+406 |
| Other Names: | TeV 2032+413
0FGL J2032.2+4122
2HWC J2024+417* |
| Source Type: | UNID |
| R.A.: | 20 28 43.2 (hh mm ss) |
| Dec.: | +41 18 36 (dd mm ss) |
| Gal Long: | 79.72 (deg) |
| Gal Lat: | 1.47 (deg) |
| Distance: | |
| Flux: | 0.39 (Crab Units) |
| Energy Threshold: | 35000 GeV |
| Spectral Index: | 3.22 |
| Extended: | Yes |
| Size (X): | 1.80 (deg) |
| Size (Y): | 1.80 (deg) |
| Discovery Date: | 2007-08 |
| Discovered By: | Milagro |
| TeVCat SubCat: | Default Catalog |
Source Notes:
Special Note:
Although this source is associated with
TeV 2032+4130,
it is also listed here under a separate entry due to the fact
that the Milagro results indicate that the excess could be due
to more than one source (
Abdo et al., 2007).
Source position and its uncertainty:
From
Abdo et al. (2012):
- R.A. (J2000): 307.18 (= 20h 28m 43.2s)
- Dec. (J2000): 41.31 (= +41d 18' 36")
From
Bartoli et al. (2012):
- R.A. (J2000): 307.85 deg (= 20h 31m 24s)
- Dec. (J2000): 41.75 deg (= 41d 45')
From
Abdo et al. (2007):
- l: 80.3 (R.A. J2000: 20 32 08.97)
- b: 1.1 (Dec. J2000: 41 33 39.0)
- Positional uncertainty: 0.47 deg (stat), 0.3deg (syst)
From
Abdo et al. (2009):
- R.A. (J2000): 20h 31m 43s
- Dec. (J2000): 40d 40m
... +/- 0.3 deg (stat)
Source Extent:
From
Abdo et al. (2012):
- A fit of a two-dimensional Gaussian gives sigma = 1.8 deg (radius)
From
Bartoli et al. (2012):
- the intrinsic extension is determined to be 0.2 +0.4 -0.2 deg
From
Abdo et al. (2007):
- spatial extent: 3.0 +/- 0.9 deg
"... much larger than the few-arcminute extent of TeV J2032+413
...There must be another source or sources contributing"
Flux:
From
Abdo et al. (2012):
- Flux normalisation for a power law is 2.1 +0.6(stat) -0.6(stat) x10e-10 s-1 m-2 TeV-1 at 10TeV
- The overall flux is subject to a 30% syst. uncertainty
From
Bartoli et al. (2012):
- "the integral flux is 31% that of the Crab at energies above 1 TeV ..."
From
Abdo et al. (2009):
- The flux quoted here is based on a comparison of the Milagro flux
at 35 TeV of 63.3e-17 /TeV /s /cm2 with that from the Crab
(162.6e-17 /TeV /s /cm2) also quoted at 35 TeV.
Spectral Information:
From
Abdo et al. (2012):
- the preferred spectral fit is a power law
- Spectral index: 3.22 +0.23(stat) -0.18(stat) +/- 0.1(syst)
From
Bartoli et al. (2012):
- Spectral index: 2.83 +/- 0.37
Source Association:
From
Cao et al. (2021):
- MGRO J2031+41 may be associated with
LHAASO J2032+4102
From
Abeysekara et al. (2017):
- "Source 2HWC J2024+417* is detected with TS of 28.4 and could be
part of the extended morphology of 2HWC J2031+415 (
TeV J2032+4130). It
is 0.35deg from 3FGL J2023.5+4126, which is associated with the Cygnus
Cocoon field. In addition to the diffuse emission, the 3FGL catalog
also lists multiple sources associated with the Cygnus Cocoon field."
From
Acero et al. (2013):
- This LAT emission from this source below 10 GeV is likely from a
pulsar
Seen by: Milagro, ARGO-YBJ, HAWC
-
Modeling of GeV-TeV gamma-ray emission of Cygnus Cocoon
Bykov, A.M. and Kalyashova, M.E., arXiv e-prints parXiv:2203.09842 (2022) [LINK]
-
Limits on Leptonic TeV Emission from the Cygnus Cocoon with Swift-XRT
Guevel, David et al., arXiv e-prints parXiv:2211.07617 (2022) [LINK]
-
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]
-
Observation of photons above 300 TeV associated with a high-energy neutrino from the Cygnus Cocoon region
Dzhappuev, D.D. et al., arXiv e-prints parXiv:2105.07242 (2021) [LINK]
-
The Hunt for Pevatrons: The Case of Supernova Remnants
Cristofari, P., arXiv e-prints parXiv:2110.07956 (2021) [LINK]
-
Testing the Limits of Particle Acceleration in Cygnus OB2 with HAWC
Hona, B. et al., 36th International Cosmic Ray Conference (ICRC2019) 36 p699 (2019) [LINK]
-
Massive Stars as Major Factories of Galactic Cosmic Rays
Aharonian, F. et al., ArXiv e-prints p (2018) [LINK]
-
Constraining cosmic ray acceleration in young star clusters using multi-wavelength observations
Gupta, S. et al., ArXiv e-prints p (2018) [LINK]
-
Cosmic rays from supernova remnants and superbubbles
Lingenfelter, R.E., ArXiv e-prints p (2018) [LINK]
-
The 2HWC HAWC Observatory Gamma-Ray Catalog
Abeysekara, A.U. et al., ApJ 843 p40 (2017) [LINK]
-
Latest results from the ARGO-YBJ experiment
Di Sciascio, G. and for the ARGO-YBJ Collaboration, ArXiv e-prints p (2015) [LINK]
-
Suzaku Observation of the Fermi Cygnus Cocoon: Search for a Signature of Young Cosmic-Ray Electrons
Mizuno, T. et al., ArXiv e-prints p (2015) [LINK]
-
Identification of the TeV Gamma-Ray Source ARGO J2031+4157 with the Cygnus Cocoon
Bartoli, B. et al., ApJ 790 p152 (2014) [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]
-
TeV gamma-ray survey of the Northern sky using the ARGO-YBJ detector
The ARGO-YBJ Collaboration et al., ArXiv e-prints p (2013) [LINK]
-
TeV Gamma-Ray Survey of the Northern Sky Using the ARGO-YBJ Detector
Bartoli, B. et al., ApJ 779 p27 (2013) [LINK]
-
Spectrum and Morphology of the Two Brightest Milagro Sources in the Cygnus Region: MGRO J2019+37 and MGRO J2031+41
Abdo, A.A. et al., ArXiv e-prints p (2012) [LINK]
-
Observation of TeV Gamma Rays from the Cygnus Region with the ARGO-YBJ Experiment
Bartoli, B. et al., ApJ 745 pL22 (2012) [LINK]
-
TeV gamma-ray survey of the northern sky using the ARGO-YBJ experiment
Cao, Z. et al., ArXiv e-prints p (2011) [LINK]
-
Detection of X-Ray Emission from the Unidentified TeV Gamma-Ray Source TeV J2032+4130
Murakami, H. et al., PASJ 63 p873 (2011) [LINK]
-
Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List
Abdo, A.A. et al., ApJ 700 pL127-L131 (2009) [LINK]
-
TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
Abdo, A.A. et al., ApJ 664 pL91-L94 (2007) [LINK]
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