Gamma-ray spectroscopy of positron annihilation in the Milky Way

Thomas Siegert; Roland Diehl; Gerasim Khachatryan; Martin G. H. Krause; Fabrizia Guglielmetti; Jochen Greiner; Andrew W. Strong; Xiaoling Zhang

doi:10.1051/0004-6361/201527510

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Volume 586 (February 2016)

A&A, 586 (2016) A84

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Table 2

Characteristics of the sky model components assumed in our analysis.

Comp.	G. Lon. position [deg]	G. Lat. position [deg]	Lon. extent (FWHM) [deg]	Lat. extent (FWHM) [deg]

NB	−1.25	−0.25	5.75	5.75
BB	0.00	0.00	20.55	20.55
Disk	0.00	0.00	141.29	24.73
GCS^a^b	−0.06	−0.05	0.00	0.00
Crab^a	−175.44	−5.78	0.00	0.00
Cyg X-1^a	71.34	3.07	0.00	0.00

Notes. The parameters are similar to those of Skinner et al. (2014), except for the extent of the disk. The disk extent has been chosen according to a 2D gridscan for a total maximum likelihood over all 80 bins (see Sect. 3.1).

^(a)

An extent of 0° is equivalent to a point source.

^(b)

The Galactic Centre Source has been chosen to coincide with the position of Sgr A* (see text for details).

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