========================================================================== BAT GROUND-DETECTED GRB DATA PROCESSING REPORT (This burst occurred during telescope slew) Process Script Ver: batgrbproduct v2.46 Process Start Time: Fri Apr 3 13:20:05 EDT 2015 Host Name: bat1 Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger636865 ====================================================================== Trigger: 00636865 Segment: 000 BAT Trigger Time: 449627880.0 UTC: 2015-04-02T00:37:46.694 [includes UTCF correction] Where From?: Ground analysis (best_duration.txt) NOTE: BAT trigger time for ground-detected burst during slew is the T100 start time. Analysis Position: [ source = GCN ] RA: 173.604 Dec: 40.988 [deg; J2000] Refined Position: [ source = BAT mosaic image ] RA: 173.625622355006 Dec: 40.9819564484979 [deg; J2000] { 11h 34m 30.1s , +40d 58' 55.0" } +/- 2.58845709262 [arcmin] (estimated 90% radius based on SNR) SNR: 7.81837808864 Angular difference between the analysis and refined position is 1.044315 arcmin Partial Coding Fraction: Unavailable because the burst occurred during slew. Duration T90: 14.4000000357628 +/- 1.6 Measured from: 0 to: 14.4 [s; relative to TRIGTIME] T50: 8.00000005960464 +/- 1.6 Measured from: 3.2 to: 11.2 [s; relative to TRIGTIME] ====== Table of the duration information ============================= Value tstart tstop T100 14.400 0.000 14.400 T90 14.400 0.000 14.400 T50 8.000 3.200 11.200 Peak 1.000 13.100 14.100 ====== Spectral Analysis Summary ===================================== Model : spectral model: simple power-law (PL) and cutoff power-law (CPL) Ph_index : photon index: E^{Ph_index} Ph_90err : 90% error of the photon index Epeak : Epeak in keV Epeak_90err: 90% error of Epeak Norm : normalization at 50 keV in both the PL model and CPL model Nomr_90err : 90% error of the normalization chi2 : Chi-Squared dof : degree of freedo === Time-averaged spectral analysis === (Best model with acceptable fit: PL) Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof PL -2.277 -0.521 0.442 - - - 1.88e-03 -6.66e-04 6.42e-04 53.040 57 CPL -1.889 N/A N/A 10.208 N/A N/A 3.34e-03 N/A N/A 53.090 56 === 1-s peak spectral analysis === (Best model with acceptable fit: N/A) Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof PL N/A N/A N/A - - - N/A N/A N/A N/A N/A CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A === Fluence/Peak Flux Summary === Model Band1 Band2 Band3 Band4 Band5 Total 15-25 25-50 50-100 100-350 15-150 15-350 keV Fluence PL 4.05e-08 4.65e-08 3.84e-08 5.32e-08 1.45e-07 1.78e-07 erg/cm2 90%_error_low -1.16e-08 -1.18e-08 -1.71e-08 -3.46e-08 -4.08e-08 -6.22e-08 erg/cm2 90%_error_hi 1.18e-08 1.14e-08 1.91e-08 6.39e-08 4.34e-08 8.41e-08 erg/cm2 Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 173.626 40.982 0.009 20.049 -76.806 0.063 7.818 UNKNOWN Image time interval: 0.000 to 3.000 [sec]
Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.
Time interval is from 0.000 sec. to 8.070 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.27697 ( -0.520578 0.441912 ) Norm@50keV : 1.88229E-03 ( -0.000666231 0.000642283 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.04 using 59 PHA bins. # Reduced chi-squared = 0.9306 for 57 degrees of freedom # Null hypothesis probability = 6.242896e-01 Photon flux (15-150 keV) in 8.07 sec: 0.324820 ( -0.073897 0.073903 ) ph/cm2/s Energy fluence (15-150 keV) : 1.44592e-07 ( -4.08262e-08 4.33674e-08 ) ergs/cm2
Time interval is from 0.000 sec. to 8.070 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.88872 ( ) Epeak [keV] : 10.2078 ( ) Norm@50keV : 3.34049E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.09 using 59 PHA bins. # Reduced chi-squared = 0.9480 for 56 degrees of freedom # Null hypothesis probability = 5.857182e-01 Photon flux (15-150 keV) in 8.07 sec: 0.324828 ( -0.073852 0.073856 ) ph/cm2/s Energy fluence (15-150 keV) : 1.38913e-07 ( -4.84869e-08 4.96662e-08 ) ergs/cm2
1-s peak spectrum unavailable, likely because there are no event data in the 1-s peak range.
T90 = 14.4 sec. Hardness ratio (energy fluence ratio) = 0.825372539185
S(15-50 keV) = 8.695463e-08 S(50-150 keV) = 5.763666e-08
The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.