Naslov
TeV gamma-ray emission from PSR J2032+4127/ MT91 213 at periastron

Autori
Mirzoyan, Razmik ; ... ; Mukherjee, Reshmi ; ... ; Babić, Ana ; ... ; Dominis Prester, Dijana ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Puljak, Ivica ; ... ; Surić, Tihomir ; ... ; Šnidarić, Iva ; ... ; Terzić, Tomislav ; ... (the VERITAS Collaboration and the MAGIC Collaboration)

Kolaboracija
MAGIC Collaboration

Izvornik
The Astronomer's Telegram, #10971

Vrsta, podvrsta
Ostale vrste radova, ostalo

Godina
2018

Ključne riječi
GeV ; TeV ; VHE ; Binary ; Pulsar

Sažetak
The MAGIC and VERITAS collaborations report a continuing increase in TeV gamma-ray emission from the 50-year period pulsar/ Be-star binary system PSR J2032+4127/ MT91 213 (RA 20h32m13.13s, Dec +41d27m24.4s, J2000.0). The system reached periastron on 13 November 2017. The Swift X-ray flux has dropped dramatically over the past two weeks (see ATEL #10920 and the Swift light curve). MAGIC and VERITAS observations are being conducted as part of a coordinated long-term monitoring campaign. TeV emission associated with the binary was first reported in ATEL #10810, covering observations up to late September 2017. The TeV flux has further increased since then. Preliminary analysis of the most recent observations gives integral fluxes above 200 GeV of 1.9e-11 ± 0.4e-11 photons cm^-2 s^-1 for an observation of 1.9 hours on Nov 12 (MJD 58069.8) with MAGIC. This implies an increase in the flux of almost a factor 10 with respect to the average flux in June-August. The flux measured by VERITAS is also enhanced, at the level of 1.3e-11 ± 0.2e-11 photons cm^-2 s^-1 for 4 hours of observations between Nov 10 and Nov 13. TeV observations with both instruments will continue with highest priority. We strongly encourage multi-wavelength observations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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