Study of the gamma-ray source 1AGL J2022+4032 in the Cygnus region
- Chen A. W.
- Piano G.
- Tavani M.
- Trois A.
- Dubner G.
- Giacani E.
- Argan A.
- Barbiellini G.
- Bulgarelli A.
- Caraveo P.
- Cattaneo P. W.
- Costa E.
- D'Ammando F.
- De Paris G.
- Del Monte E.
- Di Cocco G.
- Donnarumma I.
- Evangelista Y.
- Feroci M.
- Ferrari A.
- Fiorini M.
- Fuschino F.
- Galli M.
- Gianotti F.
- Giuliani A.
- Giusti M.
- Labanti C.
- Lazzarotto F.
- Lipari P.
- Longo F.
- Marisaldi M.
- Mereghetti S.
- Moretti E.
- Morselli A.
- Pacciani L.
- Pellizzoni A.
- Perotti F.
- Picozza P.
- Pilia M.
- Pucella G.
- Rapisarda M.
- Rappoldi A.
- Sabatini S.
- Scalise E.
- Soffitta P.
- Striani E.
- Trifoglio M.
- Vallazza E.
- Vercellone S.
- Vittorini V.
- Zambra A.
- Zanello D.
- Pittori C.
- Giommi P.
- Verrecchia F.
- Lucarelli F.
- Santolamazza P.
- Colafrancesco S.
- Antonelli L. A.
- Salotti L.
- PREST, MICHELA
DOIAbstract
Context. Identification of gamma-ray-emitting Galactic sources is a long-standing problem in astrophysics. One such source, 1AGL J2022+4032, coincident with the interior of the radio shell of the supernova remnant Gamma Cygni (SNR G78.2+2.1) in the Cygnus region, has recently been identified by Fermi as a gamma-ray pulsar, LAT PSR J2021+4026. Aims. We present long-term observations of 1AGL J2022+4032 with the AGILE gamma-ray telescope, measuring its flux and light curve. Methods. We compare the light curve of 1AGL J2022+4032 with that of 1AGL J2021+3652 (PSR J2021+3651), showing that the flux variability of 1AGL J2022+4032 appears to be greater than the level predicted from statistical and systematic effects and producing detailed simulat...
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