batgrbproduct analysis for trigger=758766
batgrbproduct Analysis for Trigger=758766
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): Tue Jun 27 05:22:47 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger758766/GCN5_download_cron
======================================================================
Trigger: 00758766 Segment: 000
BAT Trigger Time: 520162662.4 [s; MET]
Trigger Stop: 520162663.424 [s; MET]
UTC: 2017-06-26T09:37:23.124540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 165.414032854002 Dec: 56.469149639052 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 26.2
Image Trigger?: NO
Rate S/N Ratio: 255.998046867549 [ if not an image trigger ]
Image S/N Ratio: 26.2
Flight Position: [ source = BAT ]
RA: 165.414032854002 Dec: 56.469149639052 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 165.408175636543 Dec: 56.4792771437914 [deg; J2000]
{ 11h 01m 38.0s , +56d 28' 45.4" }
+/- 0.491679938048565 [arcmin] (estimated 90% radius based on SNR)
+/- 0.114821680993721 [arcmin] (formal 1-sigma fit error)
SNR: 83.8633039587898
Angular difference between Flight and Ground position is 0.637898 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 12.9439999461174 +/- 0.339033911075112
Measured from: -1.23199987411499
to: 11.7120000720024 [s; relative to TRIGTIME]
T50: 6.93999999761581 +/- 0.167092811880064
Measured from: 0.556000113487244
to: 7.49600011110306 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0639999508857727
to: 0.936000049114227 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.3439999818802
to: 17.9240000247955 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.942542 5.512119 3.832502 0.768114
0.050351 0.055942 0.050186 0.041392 [error]
Peak 0.631437 1.157772 0.977733 0.213978
0.014549 0.019006 0.018289 0.011188 [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 1.26e-06 2.17e-06 2.87e-06 7.69e-06 8.38e-06 1.40e-05 erg/cm2
Error 4.57e-08 4.51e-08 5.83e-08 3.66e-07 1.45e-07 3.89e-07 erg/cm2
Peak flux Power-law 6.64e+00 7.60e+00 6.24e+00 8.58e+00 2.36e+01 2.91e+01 ph/cm2/s
Error 2.88e-01 2.02e-01 1.53e-01 4.43e-01 5.52e-01 6.45e-01 ph/cm2/s
Fluence Cutoff-PL 1.15e-06 2.20e-06 2.95e-06 5.09e-06 8.19e-06 1.14e-05 erg/cm2
Error 6.11e-08 4.77e-08 6.70e-08 8.08e-07 1.64e-07 8.23e-07 erg/cm2
Peak flux Cutoff-PL 5.51e+00 7.86e+00 6.76e+00 4.70e+00 2.28e+01 2.48e+01 ph/cm2/s
Error 3.66e-01 2.22e-01 1.97e-01 6.27e-01 5.77e-01 8.72e-01 ph/cm2/s
Fluence Band 1.06e-06 2.25e-06 2.86e-06 6.99e-06 8.16e-06 1.32e-05 erg/cm2
Error -------- 5.47e-08 8.05e-08 7.92e-07 1.63e-07 7.60e-07 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 1.601 0.033 - - 2.28e-02 3.89e-04 69.520 57
CPL 1.258 0.141 121.3 31.5 3.24e-02 4.58e-03 51.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.284 0.038 - - 1.98e-01 4.35e-03 101.440 57
CPL 0.572 0.175 113.8 15.3 4.14e-01 7.35e-02 45.960 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: 12.672000 sec.
T50 in the 50-300 keV band: 5.504000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 39.268 -21.344 17.924
T90 12.944 -1.232 11.712
T50 6.940 0.556 7.496
Peak 1.000 -0.064 0.936
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
165.4082 +56.4793 0.0023 8.8 79.3 14.1623 83.9 TRIG_00758766
------------------------------------------
Foreground time interval of the image:
-21.344 13.301 (delta_t = 34.645 [sec])
Background time interval of the image:
-239.400 -21.344 (delta_t = 218.056 [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 -21.344 sec. to 17.924 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60148 ( -0.0331271 0.0331152 )
Norm@50keV : 2.28240E-02 ( -0.000389501 0.00038948 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.52 using 59 PHA bins.
# Reduced chi-squared = 1.220 for 57 degrees of freedom
# Null hypothesis probability = 1.234690e-01
Photon flux (15-150 keV) in 39.27 sec: 2.93434 ( -0.0597106 0.0599423 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.38077e-06 ( -1.45111e-07 1.45156e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.344 sec. to 17.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25768 ( -0.143249 0.13896 )
Epeak [keV] : 121.277 ( -19.7995 43.127 )
Norm@50keV : 3.24237E-02 ( -0.004191 0.00496975 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.01 using 59 PHA bins.
# Reduced chi-squared = 0.9109 for 56 degrees of freedom
# Null hypothesis probability = 6.637602e-01
Photon flux (15-150 keV) in 39.27 sec: 2.84307 ( -0.0683 0.06876 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.19015e-06 ( -1.64738e-07 1.64031e-07 ) ergs/cm2
Band function
Time interval is from -21.344 sec. to 17.924 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.447857 ( -0.838233 1.649 )
beta : -1.69984 ( -0.262615 0.0584848 )
Epeak [keV] : 51.7056 ( -15.9355 69.7051 )
Norm@50keV : 0.103800 ( -0.109819 1.39068 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.12 using 59 PHA bins.
# Reduced chi-squared = 0.8749 for 55 degrees of freedom
# Null hypothesis probability = 7.328795e-01
Photon flux (15-150 keV) in 39.27 sec: 2.78607 ( 4.21393 -0.08097 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.1627e-06 ( -8.16243e-06 -1.62774e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5877 ( )
R^2/D10^2 : 0.216651 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 644.36 using 59 PHA bins.
# Reduced chi-squared = 11.305 for 57 degrees of freedom
# Null hypothesis probability = 2.145840e-100
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.799e-07 1.748e-08
25- 50 2.081e-06 5.164e-08
50-150 4.056e-06 1.257e-07
15-150 6.617e-06 1.237e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.561 (-18.4191 -198.571)
Norm : 11.7293 (-0.204119 0.244396)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.8879 for 57 degrees of freedom
# Null hypothesis probability = 7.120546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.148e-06 2.494e-08
25- 50 2.206e-06 4.379e-08
50-150 4.833e-06 9.228e-08
15-150 8.187e-06 1.492e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.98222 (-0.553217 0.578679)
R1^2/D10^2 : 1.87211 (-0.384631 0.51839)
kT2 [keV] : 27.6929 (-1.8817 2.3182)
R2^2/D10^2 : 2.71004E-02 (-0.00702488 0.00835685)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.36 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.876313e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.796e-07 5.616e-08
25- 50 2.273e-06 7.481e-08
50-150 4.826e-06 2.160e-07
15-150 8.078e-06 2.867e-07
Peak spectrum fit
Power-law model
Time interval is from -0.064 sec. to 0.936 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28425 ( -0.0376902 0.0376569 )
Norm@50keV : 0.198337 ( -0.00435092 0.00435047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.44 using 59 PHA bins.
# Reduced chi-squared = 1.7796 for 57 degrees of freedom
# Null hypothesis probability = 2.675212e-04
Photon flux (15-150 keV) in 1 sec: 23.5949 ( -0.551281 0.551904 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.96757e-06 ( -4.5732e-08 4.57656e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.064 sec. to 0.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.572229 ( -0.178518 0.171962 )
Epeak [keV] : 113.782 ( -12.0942 18.501 )
Norm@50keV : 0.413704 ( -0.0657328 0.0812856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.96 using 59 PHA bins.
# Reduced chi-squared = 0.8206 for 56 degrees of freedom
# Null hypothesis probability = 8.286012e-01
Photon flux (15-150 keV) in 1 sec: 22.7674 ( -0.5766 0.578 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9083e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.064 sec. to 0.936 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.28785E-02 ( -0.471456 0.752037 )
beta : -1.63410 ( -0.267614 0.127828 )
Epeak [keV] : 76.5716 ( -19.32 28.587 )
Norm@50keV : 0.810207 ( -0.364665 1.51714 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.28 using 59 PHA bins.
# Reduced chi-squared = 0.7142 for 55 degrees of freedom
# Null hypothesis probability = 9.458863e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.90207e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.6249 ( )
R^2/D10^2 : 1.37313 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 285.49 using 59 PHA bins.
# Reduced chi-squared = 5.0086 for 57 degrees of freedom
# Null hypothesis probability = 3.891626e-32
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.429e-08 3.970e-09
25- 50 4.471e-07 1.345e-08
50-150 1.135e-06 3.900e-08
15-150 1.676e-06 4.500e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 99.7951 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 226.84 using 59 PHA bins.
# Reduced chi-squared = 3.9796 for 57 degrees of freedom
# Null hypothesis probability = 4.048068e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.485e-07 5.850e-09
25- 50 4.780e-07 1.190e-08
50-150 1.048e-06 2.600e-08
15-150 1.775e-06 4.500e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.2147 (-1.11515 1.15484)
R1^2/D10^2 : 5.90387 (-1.3563 2.03244)
kT2 [keV] : 32.5754 (-3.89803 6.0799)
R2^2/D10^2 : 0.151773 (-0.0688259 0.0934343)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.00 using 59 PHA bins.
# Reduced chi-squared = 0.8001 for 55 degrees of freedom
# Null hypothesis probability = 8.561083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.502e-07 1.150e-08
25- 50 4.759e-07 2.805e-08
50-150 1.281e-06 1.295e-07
15-150 1.907e-06 1.430e-07
Plot creation:
Tue Jun 27 05:27:46 EDT 2017