Query : 2019A&A...626A.113S

2019A&A...626A.113S - Astronomy and Astrophysics, volume 626A, 113-113 (2019/6-1)

Tentative evidence of spatially extended GeV emission from SS433/W50.

SUN X.-N., YANG R.-Z., LIU B., XI S.-Q. and WANG X.-Y.

Abstract (from CDS):

We have analyzed ten years of the Fermi Large Area Telescope data toward the SS433/W50 region. With the latest source catalog and diffuse background models, the γ-ray excess from SS433/W50 is detected with a significance of ∼6σ in the photon energy range of 500MeV-10GeV. Our analysis indicates that an extended flat disk morphology is preferred over a point-source description, suggesting that the GeV emission region is much larger than that of the TeV emission detected by the High Altitude Water Cherenkov (HAWC) telescope. The size of the GeV emission is instead consistent with the extent of the radio nebula W50, a supernova remnant being distorted by the jets, so we suggest that the GeV emission may originate from this supernova remnant. The spectral result of the GeV emission is also consistent with a supernova remnant origin. Furthermore, we derive the GeV flux upper limits on the TeV emission region, which put moderate constraints on the leptonic models to explain the multiwavelength data.

Abstract Copyright: © ESO 2019

Journal keyword(s): gamma rays: general - supernovae: individual: SS433/W50

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 IC 433 G 05 40 31.3524514488 -11 39 56.022239160   14       ~ 28 0
2 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 926 2
3 SS 433 HXB 19 11 49.5647697480 +04 58 57.827127648   16.3 13.0     A7Ib: 2054 4
4 SNR G039.7-02.0 SNR 19 12 20 +04 55.0           ~ 339 1
5 FL8Y J1913.3+0515 gam 19 13.3 +05 15           ~ 5 0

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