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SUMMARY:GRB without hard to soft evolution and high energy emission
DTSTART;VALUE=DATE-TIME:20070706T194500Z
DTEND;VALUE=DATE-TIME:20070706T194500Z
DTSTAMP;VALUE=DATE-TIME:20260418T165231Z
UID:indico-contribution-926@cern.ch
DESCRIPTION:Speakers: Dr. MIROSHNICHENKO\, Leonid (Instituto de Geofisica\
 , UNAM\, Mexico)\nSpectral properties of some GRB with presence of high en
 ergy component \nwithin RHESSI\, HETE and \nSWIFT t90 intervals are discus
 sed.  In some cases the temporal profiles of GRB \nin low and high \nenerg
 y bands are similar but in some cases they are different and maxima are \n
 not coincide. \nWe found the same type GRB in CGRO database too – for ex
 ample\, GRB930131. \nMoreover\, for some GRB\nfrom CGRO and AVS-F database
  in which spectra contradict Band model high \nenergy component are presen
 t the hard to soft spectral evolution is absent – \nfor example\, for GR
 B930506 (t90=22.144±0.091) Epeak on burst begin less \nthan Epeak during 
 other burst parts - Epeak(1-3s)=540±58 keV\, \nEpeak(3-7s)=1064±38 keV\,
  Epeak(7-23s)=850±32 keV. All GRB with such \nproperties are long GRB for
  standatd BATSE and other classifications including \ntaking in account bu
 rst hardness ones.\nWe suppose that such type GRB consist a new subgroup o
 f long GRB.\n\nhttps://indico.nucleares.unam.mx/event/4/session/39/contrib
 ution/926
LOCATION:Merida\, Mexico Regency (Hyatt)
URL:https://indico.nucleares.unam.mx/event/4/session/39/contribution/926
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