PHEBUS ivo://nasa.heasarc/phebus NASA/GSFC HEASARC Terekhov et al.; Tkachenko et al. 2026-06-26 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov GRB The PHEBUS database table is the Terekhov et al. (1994, 1995) and Tkachenko et al. (1998, 2002) Catalog of Cosmic Gamma-Ray Bursts Registered by the Phebus (or Phoebus) instrument on-board the GRANAT Observatory which operated from December 1989 to December 1996. One of the purposes of Phebus was to study cosmic gamma-ray bursts (GRBs) in the 100 keV to 100 MeV region of the spectrum. This catalog contains information on GRBs registered during the entire seven years of the mission, such as the energy fluxes observed at the GRB luminosity maxima and the time-integrated energy fluences in the energy range above 100 keV. The details of the Phebus detectors and other operational information, such as the criteria for burst detection, can be found in the Terekhov et al. and Tkachenko et al. papers which are listed in the References Section. The original version of this database table was created by the HEASARC in the late 1990s. Later updates were made in February 2002 and March 2003, based on the HEASARC's transcription of Tables 1 and 2 of Terekhov et al. (1994), Terekhov et al. (1995) and Tkachenko, A.Yu. et al. (1998), and of Table 1 of Tkachenko, A.Yu. et al. (2002). This is a service provided by NASA HEASARC . 2002AstL...28..353T https://heasarc.gsfc.nasa.gov/W3Browse/all/phebus.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=phebus GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_phebus&Action=More+Options&Action=Parameter+Search&ConeAdd=1 GAMMA-RAY BURSTS 0.0166666666666667 Gamma-ray public phebus Granat Phebus Gamma-Ray Bursts name Burst Designation meta.id;meta.main char nullable "time" Activation Date and Time of Observation mjd time.start;obs double nullable duration Duration of Observation (sec) s time.duration;obs double nullable duration_error Duration Uncertainty (sec) s stat.error;time.duration;obs double nullable fluence Time-Integrated Energy Flux (10^-5 erg/cm^2) 10^-5_erg/cm^2 phot.fluence double nullable fluence_error Fluence Uncertainty (10^-5 erg/cm^2) 10^-5_erg/cm^2 stat.error;phot.fluence double nullable flux Peak Flux of Burst (10^-5 erg/cm^2/s) 10^-5_erg/cm^2/s phot.flux double nullable flux_error Uncertainty in Peak Flux (10^-5 erg/cm^2/s) 10^-5_erg/cm^2/s stat.error;phot.flux double nullable hardness Spectral Hardness of Burst phot.count;arith.ratio;em.X-ray double nullable red_chi_squared Best-fit Reduced Chi-Squared stat.fit.chi2 double nullable number_flag Number of Observing Run meta.id;obs double nullable spectral_form Best-fit Spectral Form meta.code;stat.fit char nullable remarks Remarks on Other Detections meta.note char nullable spectral_parameter Best-fit Spectral Parameter stat.fit.param double nullable cmax_to_cmin_error Uncertainty in Cmax-to-Cmin Ratio stat.error;phot.count;arith.ratio double nullable hardness_error Spectral Hardness Uncertainty stat.error;phot.count;arith.ratio double nullable activation_time Activation Time of Observation (character) time.start;obs char nullable cmax_to_cmin Cmax-to-Cmin Ratio phot.count;arith.ratio double nullable "__row" System index column char nullable