Sporadic emission of ultra high energy gamma rays from Crab pulsar

Conference · Sun Jan 01 00:00:00 EST 1984 · Adv. Space Res.; (United States)

OSTI ID:6015530

Bhat, P N; Gupta, S K; Ramana Murthy, P V; Sreekantan, B V; Tonwar, S C; Vishwanath, P R

A 24 hr emission variability of the Crab pulsar was examined. The data were gathered in the energy range up to 500 GeV using the Oota Atmospheric Cerenkov array. Analysis proceeded in terms of one second curves with retention of only those data within 5 sigma of the nominal values. The mean time between events was about 125 msec, while some microbursts occurred at a rate of one per 0.5 msec and could happen twice within a minute (macroburst). A coincidence of pulse occurrence and phase was noted. Phasograms were generated for the events coming from the Crab pulsar, which displayed peak emissions for only 0.0001 of the observing time. It is concluded that traditional averaging analysis can mask periods of intense emissions. 7 references.

• Research Organization: Tata Inst. of Fundamental Research, Bombay, India
• OSTI ID: 6015530
• Report Number(s): CONF-8307144-
• Journal Information: Adv. Space Res.; (United States), Vol. 3; Conference: Symposium on high-energy astrophysics and cosmology, Pamporovo, Bulgaria, 18 Jul 1983
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
PULSARS
GAMMA RADIATION
CHERENKOV COUNTERS
CRAB NEBULA
GAMMA ASTRONOMY
STELLAR RADIATION
ASTRONOMY
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
NEBULAE
RADIATION DETECTORS
RADIATIONS
SUPERNOVA REMNANTS
640103* - Astrophysics & Cosmology- Quasi-Stellar
Radio
& X-Ray Sources- (-1987)