2011ApJ...738...42G

Query : 2011ApJ...738...42G

2011ApJ...738...42G - Astrophys. J., 738, 42 (2011/September-1)

Detection of the pulsar wind nebula HESS J1825-137 with the Fermi large area telescope.

GRONDIN M.-H., FUNK S., LEMOINE-GOUMARD M., VAN ETTEN A., HINTON J.A., CAMILO F., COGNARD I., ESPINOZA C.M., FREIRE P.C.C., GROVE J.E., GUILLEMOT L., JOHNSTON S., KRAMER M., LANDE J., MICHELSON P., POSSENTI A., ROMANI R.W., SKILTON J.L., THEUREAU G. and WELTEVREDE P.

Abstract (from CDS):

We announce the discovery of 1-100 GeV gamma-ray emission from the archetypal TeV pulsar wind nebula (PWN) HESS J1825-137 using 20 months of survey data from the Fermi-Large Area Telescope (LAT). The gamma-ray emission detected by the LAT is significantly spatially extended, with a best-fit rms extension of σ = 0°.56±0°.07 for an assumed Gaussian model. The 1-100 GeV LAT spectrum of this source is well described by a power law with a spectral index of 1.38±0.12±0.16 and an integral flux above 1 GeV of (6.50±0.21 ±3.90)x10–9/cm2/s. The first errors represent the statistical errors on the fit parameters, while the second ones are the systematic uncertainties. Detailed morphological and spectral analyses bring new constraints on the energetics and magnetic field of the PWN system. The spatial extent and hard spectrum of the GeV emission are consistent with the picture of an inverse Compton origin of the GeV-TeV emission in a cooling-limited nebula powered by the pulsar PSR J1826-1334.

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Journal keyword(s): gamma rays: general - ISM: individual (G18.0-0.7, HESS J1825-137) - pulsars: general - pulsars: individual (PSR B1823-13, PSR J1826-1334)

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2446 1
2 1FGL J1823.2-1336c gam 18 23 05.97 -13 40 00.7           ~ 25 0
3 PSR J1826-1256 Psr 18 26 08.570 -12 56 33.53           ~ 152 1
4 PSR B1823-13 Psr 18 26 13.06 -13 34 48.1           ~ 460 1
5 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 613 2

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