batgrbproduct analysis for trigger=760064
batgrbproduct Analysis for Trigger=760064
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Jul 5 23:01:23 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger760064/GCN5_download_cron
======================================================================
Trigger: 00760064 Segment: 000
BAT Trigger Time: 520915566.4 [s; MET]
Trigger Stop: 520915567.424 [s; MET]
UTC: 2017-07-05T02:45:47.080260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 191.705000976796 Dec: 18.29305165087 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.55
Image Trigger?: NO
Rate S/N Ratio: 15.2315462117278 [ if not an image trigger ]
Image S/N Ratio: 8.55
Flight Position: [ source = BAT ]
RA: 191.705000976796 Dec: 18.29305165087 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 191.708503514225 Dec: 18.2975733568011 [deg; J2000]
{ 12h 46m 50.0s , +18d 17' 51.3" }
+/- 0.77031775282197 [arcmin] (estimated 90% radius based on SNR)
+/- 0.286636977702942 [arcmin] (formal 1-sigma fit error)
SNR: 44.1589271085364
Angular difference between Flight and Ground position is 0.336774 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 206.567999958992 +/- 18.0780517612736
Measured from: 3.59600013494492
to: 210.164000093937 [s; relative to TRIGTIME]
T50: 36.3359999060631 +/- 94.5421790482648
Measured from: 12.0800001621246
to: 48.4160000681877 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.4120000004768
to: 14.4120000004768 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.436000049114227
to: 304.860000014305 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.816052 5.793060 4.143933 1.037892
0.111748 0.117503 0.104043 0.091618 [error]
Peak 0.364454 0.618352 0.558754 0.133791
0.012727 0.015464 0.015092 0.010243 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== 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 Power-law 1.50e-06 2.52e-06 3.22e-06 8.23e-06 9.52e-06 1.55e-05 erg/cm2
Error 8.04e-08 7.54e-08 1.12e-07 6.64e-07 2.65e-07 7.22e-07 erg/cm2
Peak flux Power-law 3.93e+00 4.48e+00 3.66e+00 4.99e+00 1.39e+01 1.71e+01 ph/cm2/s
Error 2.31e-01 1.58e-01 1.26e-01 3.67e-01 4.34e-01 5.18e-01 ph/cm2/s
Fluence Cutoff-PL 1.50e-06 2.52e-06 3.22e-06 8.20e-06 9.52e-06 1.55e-05 erg/cm2
Error 8.28e-08 7.48e-08 1.12e-07 1.08e-06 2.62e-07 1.10e-06 erg/cm2
Peak flux Cutoff-PL 3.59e+00 4.57e+00 3.81e+00 3.50e+00 1.36e+01 1.55e+01 ph/cm2/s
Error 2.97e-01 1.71e-01 1.54e-01 7.18e-01 4.58e-01 8.72e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.649 0.053 - - 3.36e-03 8.92e-05 62.050 57
CPL 1.650 0.054 9999.4 -0.0 3.36e-03 3.06e-04 62.080 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.292 0.053 - - 1.17e-01 3.46e-03 46.930 57
CPL 0.926 0.220 164.1 93.1 1.71e-01 3.90e-02 38.210 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 237.952000 sec.
T50 in the 50-300 keV band: 88.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 304.424 0.436 304.860
T90 206.568 3.596 210.164
T50 36.336 12.080 48.416
Peak 1.000 13.412 14.412
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
191.7085 +18.2976 0.0044 27.6 -153.3 2.3795 44.2 TRIG_00760064
------------------------------------------
Foreground time interval of the image:
0.436 9.601 (delta_t = 9.165 [sec])
Background time interval of the image:
-239.400 -218.560 (delta_t = 20.840 [sec])
-217.400 0.436 (delta_t = 217.836 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.436 sec. to 304.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64884 ( -0.0532493 0.0534077 )
Norm@50keV : 3.36238E-03 ( -8.92713e-05 8.91938e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.05 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 3.010447e-01
Photon flux (15-150 keV) in 304.4 sec: 0.438877 ( -0.0130409 0.013096 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.52011e-06 ( -2.64156e-07 2.64867e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.436 sec. to 304.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64958 ( -0.0554337 0.052091 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 3.36416E-03 ( -8.92632e-05 0.000523124 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.08 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 56 degrees of freedom
# Null hypothesis probability = 2.684216e-01
Photon flux (15-150 keV) in 304.4 sec: 0.439164 0.438614 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.52139e-06 ( -2.65041e-07 2.58862e-07 ) ergs/cm2
Band function
Time interval is from 0.436 sec. to 304.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.91265 ( -4.91265 -4.91265 )
beta : -1.66016 ( -0.055194 0.0546656 )
Epeak [keV] : 20.6498 ( -20.6498 3.24222 )
Norm@50keV : 1122.57 ( -29.5121 1.90636e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.34 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.593218e-01
Photon flux (15-150 keV) in 304.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.2301 ( )
R^2/D10^2 : 4.26384E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 411.25 using 59 PHA bins.
# Reduced chi-squared = 7.2150 for 57 degrees of freedom
# Null hypothesis probability = 4.077533e-55
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.287e-07 3.440e-08
25- 50 2.533e-06 9.878e-08
50-150 4.025e-06 2.237e-07
15-150 7.187e-06 2.146e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 175.337 (-24.6503 -175.531)
Norm : 1.75154 (-0.0565809 0.0598608)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.45 using 59 PHA bins.
# Reduced chi-squared = 1.306 for 57 degrees of freedom
# Null hypothesis probability = 6.020663e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.349e-06 7.473e-08
25- 50 2.554e-06 1.685e-07
50-150 5.356e-06 1.233e-06
15-150 9.258e-06 1.352e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.71056 (-0.658241 0.73449)
R1^2/D10^2 : 0.573493 (-0.178719 0.27706)
kT2 [keV] : 26.5389 (-2.52837 3.40237)
R2^2/D10^2 : 4.82039E-03 (-0.00167541 0.0021322)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.50 using 59 PHA bins.
# Reduced chi-squared = 1.445 for 55 degrees of freedom
# Null hypothesis probability = 1.701633e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.380e-06 1.190e-07
25- 50 2.535e-06 1.291e-07
50-150 5.461e-06 3.790e-07
15-150 9.376e-06 4.855e-07
Peak spectrum fit
Power-law model
Time interval is from 13.412 sec. to 14.412 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29237 ( -0.0528482 0.0528306 )
Norm@50keV : 0.116560 ( -0.0034552 0.00345518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.93 using 59 PHA bins.
# Reduced chi-squared = 0.8234 for 57 degrees of freedom
# Null hypothesis probability = 8.267283e-01
Photon flux (15-150 keV) in 1 sec: 13.8866 ( -0.433784 0.434352 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15398e-06 ( -3.71645e-08 3.72279e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.412 sec. to 14.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.926405 ( -0.2254 0.214713 )
Epeak [keV] : 164.077 ( -41.8471 144.327 )
Norm@50keV : 0.171124 ( -0.0337222 0.0442722 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.21 using 59 PHA bins.
# Reduced chi-squared = 0.6824 for 56 degrees of freedom
# Null hypothesis probability = 9.668535e-01
Photon flux (15-150 keV) in 1 sec: 13.6193 ( -0.4578 0.4586 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13279e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 13.412 sec. to 14.412 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.724061 ( -0.403246 1.24644 )
beta : -1.48511 ( 1.48511 0.143397 )
Epeak [keV] : 108.895 ( -65.3558 180.517 )
Norm@50keV : 0.224097 ( -0.0849252 1.06152 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.91 using 59 PHA bins.
# Reduced chi-squared = 0.6893 for 55 degrees of freedom
# Null hypothesis probability = 9.617886e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.4679 ( )
R^2/D10^2 : 0.812594 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 226.03 using 59 PHA bins.
# Reduced chi-squared = 3.9655 for 57 degrees of freedom
# Null hypothesis probability = 5.489320e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.502e-08 3.185e-09
25- 50 2.593e-07 1.045e-08
50-150 6.460e-07 3.395e-08
15-150 9.604e-07 3.630e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 58.1572 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 114.19 using 59 PHA bins.
# Reduced chi-squared = 2.0033 for 57 degrees of freedom
# Null hypothesis probability = 1.059724e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.448e-07 4.500e-09
25- 50 2.786e-07 8.400e-09
50-150 6.110e-07 1.945e-08
15-150 1.034e-06 3.300e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.18214 (-1.10793 1.23648)
R1^2/D10^2 : 6.90658 (-2.32496 4.02767)
kT2 [keV] : 29.8531 (-3.25953 4.83195)
R2^2/D10^2 : 0.131884 (-0.053834 0.0684895)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.70 using 59 PHA bins.
# Reduced chi-squared = 0.7765 for 55 degrees of freedom
# Null hypothesis probability = 8.865316e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.034e-07 1.061e-08
25- 50 2.681e-07 2.130e-08
50-150 7.598e-07 6.855e-08
15-150 1.131e-06 9.165e-08
Plot creation:
Wed Jul 5 23:06:31 EDT 2017