X-ray and TeV gamma-ray emission from the 50-year period binary system PSR J2032+4127/MT91 213. (arXiv:1908.04165v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Williamson_T/0/1/0/all/0/1">Tyler Williamson</a> (for the VERITAS and MAGIC collaborations)
We report on X-ray and TeV gamma-ray observations of the pulsar/Be star
binary PSR J2032+4127/MT91 213. PSR J2032+4127 is a 143-ms gamma-ray pulsar
which shares a long period (45-50 year) and highly eccentric orbit with the
massive Be star MT91 213. TeV gamma-ray emission was detected from the binary
following a coordinated observing campaign over the fall 2017 periastron with
VERITAS, MAGIC, and X-ray monitoring with Swift-XRT. The discovery of this
gamma-ray binary makes it just the second such source known to contain a pulsar
as the compact object. We report on over 100 hours of extensive TeV
observations across the periastron passage, which reveal variations in the TeV
flux by an order of magnitude over time scales of days. The X-ray flux was also
found to be highly variable, although it was not directly correlated with the
TeV flux. These observations present serious challenges to existing models of
the system, which will require significant revisions. We also discuss the
steady and extended TeV source TeV J2032+4130, which lies in the same direction
as the binary system, and its potential association with the pulsar.
We report on X-ray and TeV gamma-ray observations of the pulsar/Be star
binary PSR J2032+4127/MT91 213. PSR J2032+4127 is a 143-ms gamma-ray pulsar
which shares a long period (45-50 year) and highly eccentric orbit with the
massive Be star MT91 213. TeV gamma-ray emission was detected from the binary
following a coordinated observing campaign over the fall 2017 periastron with
VERITAS, MAGIC, and X-ray monitoring with Swift-XRT. The discovery of this
gamma-ray binary makes it just the second such source known to contain a pulsar
as the compact object. We report on over 100 hours of extensive TeV
observations across the periastron passage, which reveal variations in the TeV
flux by an order of magnitude over time scales of days. The X-ray flux was also
found to be highly variable, although it was not directly correlated with the
TeV flux. These observations present serious challenges to existing models of
the system, which will require significant revisions. We also discuss the
steady and extended TeV source TeV J2032+4130, which lies in the same direction
as the binary system, and its potential association with the pulsar.
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