We report the detection of a new γ-ray source in the Fermi-LAT sky using a source detection tool based on the minimal spanning tree algorithm. The source, not reported in previous LAT catalogues but very recently observed in the X-rays and optical bands, is characterized by an increasing γ-ray activity in 2012 June-September that reached a weekly peak flux of (3.3 ± 0.6) × 10-7 photons cm-2 s-1. A search for a possible counterpart provides indication that it can be associated with the radio source NVSS J141828+354250, whose optical SDSS colours are typical of a blazar. © 2013 ESO.
A new flaring high-energy γ-ray source / E., Bernieri; Campana, Riccardo; Massaro, Enrico; A., Paggi; Tramacere, Andrea. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - STAMPA. - 551:(2013), p. L5. [10.1051/0004-6361/201220834]
A new flaring high-energy γ-ray source
CAMPANA, RICCARDO;MASSARO, Enrico;TRAMACERE, Andrea
2013
Abstract
We report the detection of a new γ-ray source in the Fermi-LAT sky using a source detection tool based on the minimal spanning tree algorithm. The source, not reported in previous LAT catalogues but very recently observed in the X-rays and optical bands, is characterized by an increasing γ-ray activity in 2012 June-September that reached a weekly peak flux of (3.3 ± 0.6) × 10-7 photons cm-2 s-1. A search for a possible counterpart provides indication that it can be associated with the radio source NVSS J141828+354250, whose optical SDSS colours are typical of a blazar. © 2013 ESO.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
