TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro

By A. Abdo, B. Allen, D. Berley, S. Casanova, C. Chen, D. Coyne, B. Dingus, R. Ellsworth, L. Fleysher, R. Fleysher and 24 more. 2007

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A survey of Galactic gamma-ray sources at a median energy of ~20 TeV has been performed using the Milagro Gamma-Ray Observatory. Eight candidate sources of TeV emission are detected with pretrial significances >4.5 σ in the region of Galactic longitude l ∊ [30°, 220°] and latitude b ∊ [-10°, 10°]. Four of these sources, including the Crab Nebula and the recently published MGRO J2019+37, are observed with significances >4 σ after accounting for the trials. All four of these sources are also coincident with EGRET sources. Two of the lower significance sources are coincident with EGRET sources, and one of these sources is Geminga. The other two candidates are in the Cygnus region of the Galaxy. Several of the sources appear to be spatially extended. The fluxes of the sources at 20 TeV range from ~25% of the Crab flux to nearly as bright as the Crab.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/8b8086a157065573c5d8f19a071c7f7d8f4896df

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Citations in the corpus

A Measurement of the Spatial Distribution of Diffuse TeV Gamma-Ray Emission from the Galactic Plane with Milagro (2008, methodology): “More recent measurements of the diffuse emission near 12 TeV from the Cygnus region of the Galaxy (Abdo et al. 2007a) also show an excess when compared to predictions of GALPROP, 1 Naval Research Laboratory, Washington, DC. 2 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA. 3 University…”
MILAGRO OBSERVATIONS OF MULTI-TeV EMISSION FROM GALACTIC SOURCES IN THE FERMI BRIGHT SOURCE LIST (2009, methodology): “Six of these are associated with sources or candidates from the first Milagro survey of the Galactic plane (Abdo et al. 2007b).”
THE SWIFT/BAT HARD X-RAY TRANSIENT MONITOR (2006, background): “…X rays, INTEGRAL IBIS/ISGRI (Bird et al. 2010; Krivonos et al. 2012) in hard X rays to soft γ rays, the Fermi Large Area Telescope (LAT; Atwood et al. 2009; Nolan et al. 2012) and AGILE (Pittori et al 2009) in γ rays, and the Milagro observatory (Atkins et al. 2004; Abdo et al. 2007) in TeV γ rays.”
Searches for Extended and Point-like Neutrino Sources with Four Years of IceCube Data (2014, background): “The catalog contains four SNRs associated with molecular clouds in the northern sky (Abdo et al. 2007, 2009a, 2009b, 2010; Ackermann et al. 2013; Fiasson et al. 2009) that were previously considered in Aartsen et al. (2013c), and six newly introduced sources from SNRCat in the southern sky.”
The First LHAASO Catalog of Gamma-Ray Sources (2023, methodology): “Several VHE gamma-ray surveys with positive results have been conducted to date, including those by Tibet AS γ (Amenomori et al. 2005), Milagro (Abdo et al. 2007), and ARGO-YBJ (Bartoli et al. 2013).”
A census of high-energy observations of Galactic supernova remnants (2012, background): “…we note that several observatories have made surveys of the Galactic plane (ASCA26: Sugizaki et al. 2001, H.E.S.S.: Aharonian et al. 2006, Milagro: Abdo et al. 2007) or even of the whole sky (ROSAT27: Voges 2003, Fermi28: Fermi LAT Collaboration 2011), so that unexploited data might still exist…”
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG (2010, unknown): “The associations include the Milagro sources MGRO J1908+06, MGRO J2019+37, and MGRO J2031+41 (Abdo et al. 2007), as well as MGRO J0632+17 and MGRO J2228+61 (Abdo et al. 2009p; Goodman & Sinnis 2009), reported as part of a search for spatial correlations between the Milagro skymap and sources in the…”
THE LARGE-SCALE COSMIC-RAY ANISOTROPY AS OBSERVED WITH MILAGRO (2008, background): “The second set of tests shows that no false harmonic features are induced from isolated structures (e.g. a square well deficit centered around ∼ 185◦ or the known Galactic equator excess of gamma-rays (Atkins et al. 2005; Abdo et al. 2007, 2008)).”
FERMI LARGE AREA TELESCOPE FIRST SOURCE CATALOG (2010, unknown): “The associations include the Milagro sources MGRO J1908+06, MGRO J2019+37, and MGRO J2031+41 (Abdo et al. 2007), as well as MGRO J0632+17 and MGRO J2228+61 (Abdo et al. 2009p; Goodman & Sinnis 2009), reported as part of a search for spatial correlations between the Milagro skymap and sources in the…”
Sensitivity of the high altitude water Cherenkov detector to sources of multi-TeV gamma rays (2013, methodology): “e current generation of IACTs, it had the advantages of > 90% uptime and a large instantaneous ﬁeld of view. As a result, the experiment was used to discover new Galactic sources of TeV gamma rays [7], diﬀuse emission from the Galactic plane [8] [9], and measure an anisotropy in the arrival direc”
Cosmological Magnetic Fields: Their Generation, Evolution and Observation (2013, methodology): “The possibility of wide FoV telescopes in the TeV band is now demonstrated by the MILAGRO (Abdo et al 2007), Tibet-ASγ (Amenomori et al 2010) and ARGO-ABJ (D’Ettorre Piazzoli 2013) arrays.”
Broad-band non-thermal emission from molecular clouds illuminated by cosmic rays from nearby supernova remnants (2009, background): “Following this rationale, Gabici and Aharonian (2007) proposed that some of the unidentified TeV sources detected by HEGRA (Aharonian et al. 2002), H.E.S.S. (Aharonian et al. 2006b) and MILAGRO (Abdo et al. 2007) might in fact be such clouds illuminated by a nearby SNR.”
Teraelectronvolt Astronomy (2010, methodology): “Indeed the extensive air-shower sampling (EAS) technique has recently produced its first contributions to the catalogue of TeV sources (Abdo et al. 2007a) and proved its usefulness for all sky surveys (at modest sensitivity) and the detection of diffuse emission (Abdo et al. 2008).”