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Modeling phase-aligned gamma-ray and radio millisecond pulsar light curves

Venter, C.; Johnson, T.J.; Harding, A.K. (IOP Publishing, 2012)

Since the discovery of the first eight gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope, this population has been steadily expanding. Four of the more recent detections, PSR J0034–0534, PSR J1939+2134 ...

Cloud ablation by a relativistic jet and the extended flare in CTA 102 in 2016 and 2017

Zacharias, M.; Böttcher, M.; Jankowsky, F.; Lenain, J.-P.; Wagner, S.J. (IOP, 2017)

In late 2016 and early 2017, the flat spectrum radio quasar CTA 102 exhibited a very strong and long-lasting outburst. The event can be described by a roughly two-month long increase of the baseline flux in the monitored energy ...

Predictions of gamma-ray emission from globular cluster millisecond pulsars above 100 MeV

Venter, C.; De Jager, O.C.; Clapson, A.-C. (IOP Publishing, 2009)

The recent Fermi detection of the globular cluster (GC) 47 Tucanae highlighted the importance of modeling collective gamma-ray emission of millisecond pulsars (MSPs) in GCs. Steady flux from such populations is also expected ...

Probing millisecond pulsar emission geometry using light curves from the Fermi/Large Area Telescope

Venter, Christo; Harding, A.K.; Guillemot, L. (IOP Publishing, 2009)

An interesting new high-energy pulsar sub-population is emerging following early discoveries of gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope (LAT). We present results from three-dimensional emission ...

Probing the extent of the non-thermal emission from the Vela X region at TeV energies with H.E.S.S.

Abramowski, A.; Casanova, S.; Krüger, P.P.; Pekeur, N.W.; Sheidaei, F.; Venter, C.; Vorster, M.; H.E.S.S. Collaboration (EDP Sciences, 2012)

Context. Vela X is a region of extended radio emission in the western part of the Vela constellation: one of the nearest pulsar wind nebulae, and associated with the energetic Vela pulsar (PSR B0833-45). Extended ...

Pulsed gamma rays from the original millisecond and black widow pulsars: a case for caustic radio emission?

Guillemot, L.; Venter, C.; Johnson, T.J.; Kerr, M.; Pancrazi, B.; Fermi LAT (IOP Publishing, 2012)

We report the detection of pulsed gamma-ray emission from the fast millisecond pulsars (MSPs) B1937+21 (also known as J1939+2134) and B1957+20 (J1959+2048) using 18 months of survey data recorded by the Fermi Large Area ...

Fermi LAT discovery of extended gamma-ray emission in the direction of supernova remnant W5IC

Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Baldini, L.; Fermi LAT (IOP Publishing, 2009)

The discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope. W51C is a middle-aged remnant (~104 yr) ...

Probing the pulsar population of Terzan 5 via spectral modeling

Ndiyavala, H.; Venter, C.; Kopp, A.; Van der Walt, D.J.; Johnson, T.J. (IOP Publishing, 2019)

Terzan 5 is the only Galactic globular cluster that has plausibly been detected at very high energies by the High Energy Stereoscopic System. It has an unexpectedly asymmetric very high energy morphology that is offset ...

Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE γ-ray observations with H.E.S.S.

Abdalla, H.; Arcaro, C.; Backes, M.; Barnard, M.; Böttcher, M.; Chand, T.; Chandra, S.; Ndiyavala, H.; Schutte, H.; Seyffert, A.S.; Van der Walt, D.J.; Van Rensburg, C.; Venter, C.; Wadiasingh, Z.; Zacharias, M.; Żywucka, N.; H.E.S.S. Collaboration (EDP Sciences, 2019)

The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100 MeV < E < 100 GeV) γ-ray band, which is continuously monitored with Fermi-LAT. During two periods of high activity ...

The 2010 very high energy γ-ray flare and 10 years of multi-wavelength observations of M 87

Abramowski, A.; Büsching, I.; De Jager, O.C.; Sheidaei, F.; Venter, C.; Vorster, M.; H.E.S.S. Collaboration (IOP Publishing, 2012)

The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 – 6) × 109 M☉) provides a unique opportunity to investigate the origin of very high energy (VHE; E > 100 GeV) γ-ray ...

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