DAMPE detection of GeV gamma-ray flare from FSRQ S4 1800+44
ATel #12562; Zun-Lei Xu (PMO), Kai-Kai Duan (PMO), Wei Jiang(PMO), Fabio Gargano (Bari), Shi-Jun Lei (PMO), Xiang Li (PMO), Yun-Feng Liang (PMO), Neng-Hui Liao (PMO), M. Nicola Mazziotta (Bari), Maria Munoz Salinas(UNIGE),Zhao-Qiang Shen (PMO), Meng Su (HKU/PMO), Qiang Yuan (PMO), Yi-Zhong Fan (PMO), Jin Chang (PMO), on behalf of the DAMPE collaboration
on 8 Mar 2019; 13:18 UT
Credential Certification: Zun-Lei Xu (xuzl@pmo.ac.cn)
Subjects: Gamma Ray, >GeV, AGN, Blazar
The DArk Matter Particle Explorer (DAMPE) as a high energy cosmic ray and gamma-ray satellite-borne observatory, has detected GeV gamma-ray flare from a source positionally coincident with the flat spectrum radio quasar(FSRQ) S4 1800+44 with redshift of z=0.663 (Walsh & Carswell, 1982, MNRAS, 200, 191) and coordinates (J2000.0) of R.A.: 270.3846454 deg, Dec.: 44.0727500 deg (Johnston et al. 1995, AJ, 110, 880).
The DAMPE has recorded increased number of photons since March 5rd, 2019 UT. Our preliminary analysis shows the flux on this day reach ~(3.3+/-1.7) x10^-7 photons cm^-2 s^-1 above 2 GeV. The search for past data of DAMPE reveals the source also flared in March 2016. Enhanced activities of FSRQ S4 1800+44 was also reported at the gamma-ray bands by Fermi-LAT (ATel#12553).
DAMPE is a space-borne calorimeter detector of high energy cosmic rays and gamma-rays. The detectable energy range is about 1 GeV to 10 TeV for gamma-rays. More information about DAMPE can be found at http://www.space.pmo.cas.cn/.
