batgrbproduct Analysis for Trigger=725626
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 Dec 7 06:41:26 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger725626/GCN5_download_cron
======================================================================
Trigger: 00725626 Segment: 000
BAT Trigger Time: 502703776 [s; MET]
Trigger Stop: 502703840 [s; MET]
UTC: 2016-12-06T07:55:58.734540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.389081247729 Dec: 35.0745254645471 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.31
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.31
Flight Position: [ source = BAT ]
RA: 299.389081247729 Dec: 35.0745254645471 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.166306567694 Dec: 35.1815271240178 [deg; J2000]
{ 19h 56m 39.9s , +35d 10' 53.5" }
+/- 6.7091946643995 [arcmin] (estimated 90% radius based on SNR)
+/- 5.20737985824838 [arcmin] (formal 1-sigma fit error)
SNR: 2.00521375851219
Angular difference between Flight and Ground position is 12.677801 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 29.6559999585152 +/- 55.5728719967958
Measured from: 106.620000123978
to: 136.276000082493 [s; relative to TRIGTIME]
T50: 38.311999976635 +/- 69.7601928020831
Measured from: 87.608000099659
to: 125.920000076294 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 57.0080000162125
to: 58.0080000162125 [s; relative to TRIGTIME]
Total Fluence
Measured from: 20.3320000171661
to: 136.731999993324 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.231132 1.441356 0.770543 0.169747
0.081781 0.083005 0.070737 0.061575 [error]
Peak 0.015711 0.039617 0.015993 0.009601
0.008085 0.008320 0.007013 0.006160 [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 3.89e-07 5.80e-07 6.47e-07 1.36e-06 2.03e-06 2.98e-06 erg/cm2
Error 4.13e-08 3.99e-08 7.00e-08 3.00e-07 1.62e-07 3.68e-07 erg/cm2
Peak flux Power-law 1.89e-01 1.90e-01 1.34e-01 1.50e-01 5.72e-01 6.62e-01 ph/cm2/s
Error 9.72e-02 6.63e-02 5.42e-02 1.19e-01 1.93e-01 2.22e-01 ph/cm2/s
Fluence Cutoff-PL 3.74e-07 6.07e-07 6.42e-07 6.94e-07 1.95e-06 2.32e-06 erg/cm2
Error 4.59e-08 5.26e-08 7.56e-08 -------- 1.91e-07 6.31e-07 erg/cm2
Peak flux Cutoff-PL 9.62e-02 2.94e-01 1.08e-01 1.41e-03 5.00e-01 5.00e-01 ph/cm2/s
Error 1.09e-01 1.01e-01 7.25e-02 1.65e-02 1.83e-01 1.83e-01 ph/cm2/s
Fluence Band 3.57e-07 6.29e-07 6.12e-07 1.05e-06 1.95e-06 2.65e-06 erg/cm2
Error 5.11e-08 -------- 7.83e-08 3.81e-07 1.76e-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 1.844 0.127 - - 1.89e-03 1.50e-04 52.820 57
CPL 1.457 0.506 61.3 -22.2 3.12e-03 2.27e-03 50.980 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.505 0.518 - - 4.57e-03 1.56e-03 51.250 57
CPL -4.599 0.015 44.9 12.5 1.18e+01 4.77e+03 45.080 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 116.400 20.332 136.732
T90 29.656 106.620 136.276
T50 38.312 87.608 125.920
Peak 1.000 57.008 58.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.1663 +35.1815 0.0958 26.0 57.7 0.2475 2.0 TRIG_00725626
------------------------------------------
Foreground time interval of the image:
20.332 71.101 (delta_t = 50.769 [sec])
Background time interval of the image:
-239.000 20.332 (delta_t = 259.332 [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 20.332 sec. to 136.732 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84387 ( -0.125854 0.128599 )
Norm@50keV : 1.89447E-03 ( -0.000150531 0.000148718 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.82 using 59 PHA bins.
# Reduced chi-squared = 0.9266 for 57 degrees of freedom
# Null hypothesis probability = 6.325982e-01
Photon flux (15-150 keV) in 116.4 sec: 0.265627 ( -0.018519 0.0185338 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.02769e-06 ( -1.61156e-07 1.63122e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.332 sec. to 136.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45743 ( -0.555179 0.456818 )
Epeak [keV] : 61.2742 ( -16.8919 -61.2748 )
Norm@50keV : 3.11737E-03 ( -0.00130641 0.00322445 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.98 using 59 PHA bins.
# Reduced chi-squared = 0.9103 for 56 degrees of freedom
# Null hypothesis probability = 6.649976e-01
Photon flux (15-150 keV) in 116.4 sec: 0.260947 ( -0.019405 0.019392 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9456e-06 ( -1.90593e-07 1.92165e-07 ) ergs/cm2
Band function
Time interval is from 20.332 sec. to 136.732 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.575331 ( -1.60433 0.379816 )
beta : -2.05242 ( -0.309314 0.23698 )
Epeak [keV] : 31.5864 ( -13.4199 23.0572 )
Norm@50keV : 8.48730E-02 ( -0.0834107 111.788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.72 using 59 PHA bins.
# Reduced chi-squared = 0.8676 for 55 degrees of freedom
# Null hypothesis probability = 7.464326e-01
Photon flux (15-150 keV) in 116.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95048e-06 ( -1.94967e-06 -1.7467e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.5999 (-0.877968 0.984979)
R^2/D10^2 : 9.88202E-02 (-0.0284033 0.0388125)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.91 using 59 PHA bins.
# Reduced chi-squared = 1.630 for 57 degrees of freedom
# Null hypothesis probability = 1.871891e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.678e-07 3.341e-08
25- 50 7.213e-07 5.768e-08
50-150 4.446e-07 8.189e-08
15-150 1.434e-06 1.216e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 89.2837 (-19.8655 30.4328)
Norm : 1.20337 (-0.122286 0.141574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.8965 for 57 degrees of freedom
# Null hypothesis probability = 6.949136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.654e-07 4.318e-08
25- 50 6.169e-07 4.749e-08
50-150 9.348e-07 3.437e-07
15-150 1.917e-06 3.411e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.17929 (-1.05582 1.08036)
R1^2/D10^2 : 0.332739 (-0.127199 0.241371)
kT2 [keV] : 27.9182 (-7.0489 13.8644)
R2^2/D10^2 : 1.84559E-03 (-0.00133866 0.00354965)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.57 using 59 PHA bins.
# Reduced chi-squared = 0.8285 for 55 degrees of freedom
# Null hypothesis probability = 8.138808e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.563e-07 7.170e-08
25- 50 6.365e-07 1.152e-07
50-150 1.009e-06 4.873e-07
15-150 2.002e-06 5.817e-07
Peak spectrum fit
Power-law model
Time interval is from 57.008 sec. to 58.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50462 ( -0.518841 0.516548 )
Norm@50keV : 4.57360E-03 ( -0.00156484 0.0015519 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.8991 for 57 degrees of freedom
# Null hypothesis probability = 6.896712e-01
Photon flux (15-150 keV) in 1 sec: 0.571654 ( -0.192003 0.193222 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.33583e-08 ( -1.55118e-08 1.61177e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 57.008 sec. to 58.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.59905 ( 5.0331 5.06346 )
Epeak [keV] : 44.8978 ( -7.83378 17.2151 )
Norm@50keV : 11.8406 ( -11.4248 9533.57 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.08 using 59 PHA bins.
# Reduced chi-squared = 0.8050 for 56 degrees of freedom
# Null hypothesis probability = 8.516004e-01
Photon flux (15-150 keV) in 1 sec: 0.500086 ( -0.176439 0.189262 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.13748e-08 ( -1.06533e-08 1.33528e-08 ) ergs/cm2
Band function
Time interval is from 57.008 sec. to 58.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.95528 ( -4.14766 -3.95721 )
beta : -4.54467 ( 4.49622 2.70052 )
Epeak [keV] : 45.0114 ( -13.656 10.5348 )
Norm@50keV : 5.54617 ( -5.5784 8.25164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.96 using 59 PHA bins.
# Reduced chi-squared = 0.8174 for 55 degrees of freedom
# Null hypothesis probability = 8.310181e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.379e-08 ( -3.3783e-08 -1.19186e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.2978 (-2.80744 4.0253)
R^2/D10^2 : 0.149203 (-0.149207 0.236251)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.00 using 59 PHA bins.
# Reduced chi-squared = 0.8071 for 57 degrees of freedom
# Null hypothesis probability = 8.510799e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.781e-09 2.983e-09
25- 50 1.548e-08 9.339e-09
50-150 1.430e-08 9.850e-09
15-150 3.456e-08 2.111e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 170.905 (-117.496 -168.882)
Norm : 2.39604 (-0.802245 1.20269)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.42 using 59 PHA bins.
# Reduced chi-squared = 0.8845 for 57 degrees of freedom
# Null hypothesis probability = 7.187260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.961e-09 3.748e-09
25- 50 1.142e-08 7.005e-09
50-150 2.472e-08 1.507e-08
15-150 4.210e-08 2.566e-08
Double BB
R1^2/D10^2 : 3.03802E-05 (-3.03537e-05 -3.03537e-05)
kT2 [keV] : 11.6155 (-2.90642 4.23211)
R2^2/D10^2 : 0.173249 (-0.116542 0.308716)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.00 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 45.53 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 55 degrees of freedom
# Reduced chi-squared = 0.8280 for 55 degrees of freedom
# Reduced chi-squared = 0.8277 for 55 degrees of freedom
# Null hypothesis probability = 8.009239e-01
# Null hypothesis probability = 8.145319e-01
# Null hypothesis probability = 8.150390e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Wed Dec 7 06:50:28 EST 2016