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Hidden by a star: the redshift and the offset broad line of the Flat Spectrum Radio Quasar PKS 0903-57
P. Goldoni, C. Boisson, S. Pita +5
Context: PKS 0903-57 is a little-studied gamma-ray blazar which has recently attracted considerable interest due to the strong flaring episodes observed since 2020 in HE (100 MeV <…
Distance estimation of gamma-ray emitting BL Lac objects from imaging observations
K. Nilsson, V. Fallah Ramazani, E. Lindfors +13
Direct redshift determination of BL Lac objects is highly challenging as the emission in the optical and near-infrared (NIR) bands is largely dominated by the non-thermal emission…
Galactic transient sources with the Cherenkov Telescope Array Observatory
Cherenkov Telescope Array Observatory Consortium
A wide variety of Galactic sources show transient emission at soft and hard X-ray energies: low- and high-mass X-ray binaries containing compact objects, isolated neutron stars exh…
Optical spectroscopy of blazars for the Cherenkov Telescope Array -- III
F. D'Ammando, P. Goldoni, W. Max-Moerbeck +15
Due to their almost featureless optical/UV spectra, it is challenging to measure the redshifts of BL Lacs. As a result, about 50% of gamma-ray BL Lacs lack a firm measurement of th…