CRYSTAL JUBILEE CELEBRATIONS

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CRYSTAL JUBILEE CELEBRATIONS
1986 - 2001
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WELCOME TOHIGH ENERGY GAMMA RAY OBSERVATORY
OFTATA INSTITUTE OF FUNDAMENTAL RESEARCH
...PACHMARHI...
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THE BIRTH OF THE UNIVERSE AND AFTERMATH
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THE BIRTH OF A STAR AND ITS AFTERMATH
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X-RAY NOVAE
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GAS AROUND A GALAXY COULD BE THE TARGET OF COSMIC
RAYS RESULTING IN GAMMA RAY EMISSION
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FORMATION OF BLACK HOLE IN A SUPERNOVA
EXPLOSION
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VARIOUS GAMMA RAY SOURCES IN THE SKY
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2
1
3
E gt 100 MeV
ACTIVE GALACTIC NUCLEI
PULSARS
LMC
UNIDENTIFIED EGRET SOURCES
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LOW ENERGY GAMMA RAYS ARE STUDIED BY
SATELLITE BORNE EXPERIMENTS
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GAMMA RAY
A HIGH ENERGY GAMMA RAY HITS AIR MOLECULES AND
DEVELOPS A CASCADE OF PARTICLES WHICH PRODUCE
BLUISH LIGHT FLASH IN THE FORM OF A SPHERICAL
DISC
ELECTRON-POSITRON PAIR
CERENKOV LIGHT DISC
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CERENKOV LIGHT FLASHES HITTING A SECTOR OF
PACHMARHI ARRAY OF CERENKOV TELESCOPE. EACH OF
THE SIX TELESCOPES DETECT THE FLASH IN SEQUENCE
DEPENDING ON THE INCIDENT DIRECTION
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M I R R O R
PULSES TO FIELD PROCESSING CENTRE
A PARABOLIC MIRROR CONCENTRATES THE LIGHT AT
ITS FOCUS WHERE A LIGHT DETECTOR IS PLACED
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PHOTOMULTIPLIER
PULSES TO STATIONS THROUGH RG-213
M I R R O R
A LIGHT DETECTOR CONVERTS LIGHT INFORMATION
INTO ELECTRICAL INFORMATION WHILE AMPLIFYING IT
MILLION TIMES
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AUTOMATIC PMT SHUTTER MECHANISM
SHUTTER
MINIATURE MOTOR
MECHANISM
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A BINARY GAMMA RAY SOURCE WHERE THE ENERGETIC
PARTICLES FROM THE COMPACT OBJECT HITS THE
ATMOSPHERE OF THE COMPANION PRODUCE GAMMA RAYS
AT 2 POINTS IN THE ORBIT
PROTONS
COMPANION STAR
GAMMA RAY
TOWARDS EARTH
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SECOND EGRET CATALOG
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2
1
3
E gt 100 MeV
ACTIVE GALACTIC NUCLEI
PULSARS
LMC
UNIDENTIFIED EGRET SOURCES
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ANOTHER BINARY SOURCE WHICH EMITS GAMMA RAYS
INTERMITTANTLY
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SECOND EGRET CATALOG
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2
1
3
E gt 100 MeV
ACTIVE GALACTIC NUCLEI
PULSARS
LMC
UNIDENTIFIED EGRET SOURCES
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A MASSIVE STAR WHICH EXPLODED YEARS AGO RESULTING
IN A NEBULA (CLOUD) WHICH HOUSES A PULSAR
CALLED
CRAB
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CRAB PULSAR WHICH ROTATES 30 TIMES PER SECOND
IS A PROLIFIC EMITTER OF GAMMA RAYS WHICH ARE
DETECTED BY PACT
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SECOND EGRET CATALOG
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2
1
3
E gt 100 MeV
ACTIVE GALACTIC NUCLEI
PULSARS
LMC
UNIDENTIFIED EGRET SOURCES
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THIS ACTIVE GALACTIC NUCLEI IS ABOUT 600 MILLION
LIGHT YEARS AWAY . THIS IS ABOUT A THOUSAND
BILLION TIMES BRIGHTER THAN OUR SUN. IT EMITS
GAMMA RAYS INTERMITTENTLY WHICH IS DETECTED BY
PACT RECENTLY
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THE END
CREATED BY P. V. SUDERSAN