5 papers
Constraints on the VHE counterpart of two binary black hole mergers observed by the MAGIC and CTAO LST-1 telescopes
K. Abe, S. Abe, J. Abhir +439
We present very-high-energy gamma-ray observations of two binary black hole merger candidates, GW240615_113620 and GW241125_010116, performed with the Major Atmospheric Gamma Imagi…
A common four-beam geometry reveals altitude-stratified GeV pulses in canonical young pulsars
Paul K. H. Yeung, Takayuki Saito
Despite the diversity and energy dependence of -ray pulse morphologies in Crab, Vela and Dragonfly, the phaseograms of these three canonical young pulsars can be organised with…
Mechanism for reduction of the afterpulsing rate of PMTs
Kai Morita, Mitsunari Takahashi, Habib Ahammad Mondal +7
Photomultiplier tubes (PMTs) are used in Imaging Atmospheric Cherenkov Telescopes (IACTs) to detect Cherenkov light produced by air showers induced by gamma rays in the atmosphere.…
A mechanism-independent methodology for modeling γ-ray phaseograms of pulsars in the framework of north-south symmetry
Paul K. H. Yeung, Dmitry Khangulyan, Takayuki Saito
Fermi-LAT observations revealed that each GeV phase-folded light-curve (aka. phaseogram) of the Crab, Geminga, Dragonfly and Vela pulsars consists of two pulses (P1 & P2) and a "Br…
Competition between Increasing and Decreasing Effects of the Afterpulsing Rate of PMTs during Night-Sky Observations
Takuto Kiyomoto, Tsutomu Nagayoshi, Shunsuke Sakurai +13
Photomultiplier tubes (PMTs) have been widely used in imaging atmospheric Cherenkov telescopes (IACTs). The Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array Observato…