Please answer the following question: Read the bio below and try to give details on tsvi piran 's: - caption - fields - workplaces - doctoral advisor - notable students - birth date - name - image size - image - birth place - alma mater Bio: tsvi piran -lrb- born may 6 , 1949 in tel aviv , israel -rrb- is an israeli theoretical physicist and astrophysicist , best known for his work on gamma-ray bursts -lrb- grbs -rrb- and on numerical relativity . at a time when most astronomers believed that grbs were galactic -lrb- see however an earlier suggestion by bohdan paczynski -rrb- with eichler , livio and schramm , piran proposed that grbs originate from cosmological neutron star binary mergers , a model that is generally accepted today . during the early nineties when the cosmological vs. galactic debate took place , piran was one of the strongest and most vocal proponents of cosmological origin , which was confirmed in 1997 with the discovery of cosmological redshifts from grb 's afterglow . even before the cosmological origin of grbs was discovered piran laid the foundation to the generally accepted cosmic fireball model . he suggested that grbs herald the formation of a newborn black hole . later on , together with re'em sari and other collaborators , piran further developed the theory of grb afterglows , in a paper which has by now more than 1000 citations , and of grb jets . his review papers are the standard literature on this subject . before working on grbs , piran made important contributions to numerical relativity , the numerical solution of einstein 's equations . in 1985 he wrote the first numerical code calculating the collapse and formation of a rotating black hole and the resulting gravitational radiation waveform . this waveform shows relaxation towards the quasinormal modes of the black hole that forms . detection of this waveform in the future by advanced gravitational radiation detectors might provide the ultimate proof of the existence of a black hole . in addition to these works , piran 's contributions range over a selection of problems in relativistic astrophysics . he demonstrated the critical dependence of the stability of accretion disks on the cooling and heating mechanisms . piran was the first to point out that inflation...
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- caption is tsvi piran- fields is theoretical physics and astrophysics- workplaces is the hebrew university of jerusalem- doctoral advisor is jacob shaham and joseph katz- notable students is amos re'em sari , shai ayal , ehud nakar , jonathan ori granot , eli waxman , ehud cohen ,- birth date is 6 may 1949- name is tsvi piran- image size is 225px- image is tsvipiran.jpg- birth place is tel aviv , israel- alma mater is the hebrew university of jerusalem