batgrbproduct Analysis for Trigger=650416
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Mon Jul 27 21:47:59 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger650416/GCN5_download_cron
======================================================================
Trigger: 00650416 Segment: 000
BAT Trigger Time: 459656696 [s; MET]
Trigger Stop: 459657072 [s; MET]
UTC: 2015-07-27T02:24:41.091260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.4335015759481 Dec: 53.331361524527 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 25.6
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 25.6
Flight Position: [ source = BAT ]
RA: 54.4335015759481 Dec: 53.331361524527 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.4349720002961 Dec: 53.3206804915901 [deg; J2000]
{ 03h 37m 44.4s , +53d 19' 14.4" }
+/- 0.76495056049172 [arcmin] (estimated 90% radius based on SNR)
+/- 0.218093497475719 [arcmin] (formal 1-sigma fit error)
SNR: 44.6022150035157
Angular difference between Flight and Ground position is 0.643025 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
T50: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 376 second)
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 8.834858 1.856726 -0.045943 0.066765
0.096314 0.091783 0.077269 0.066063 [error]
Peak 8.834858 1.856726 -0.045943 0.066765
0.096314 0.091783 0.077269 0.066063 [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 2.47e-06 7.03e-07 1.08e-07 1.90e-08 3.29e-06 3.30e-06 erg/cm2
Error 2.07e-07 5.75e-08 2.46e-08 7.78e-09 1.96e-07 1.95e-07 erg/cm2
Peak flux Power-law 2.81e-01 4.61e-02 3.54e-03 2.92e-04 3.31e-01 3.31e-01 ph/cm2/s
Error 2.45e-02 3.53e-03 7.82e-04 1.15e-04 2.38e-02 2.38e-02 ph/cm2/s
Fluence Cutoff-PL 2.45e-06 7.02e-07 9.97e-08 1.27e-08 3.26e-06 3.27e-06 erg/cm2
Error 2.24e-07 5.84e-08 3.89e-08 -------- 2.41e-07 2.34e-07 erg/cm2
Peak flux Cutoff-PL 2.79e-01 4.61e-02 3.30e-03 2.05e-04 3.28e-01 3.29e-01 ph/cm2/s
Error 2.02e-02 3.57e-03 1.22e-03 2.10e-04 2.65e-02 2.66e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.86e-01 4.83e-02 3.85e-03 3.28e-04 3.39e-01 3.39e-01 ph/cm2/s
Error 2.72e-02 4.41e-03 -------- 1.86e-04 2.69e-02 2.63e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.702 0.229 - - 2.84e-04 4.92e-05 90.540 57
CPL 1.000 0.000 50.0 0.0 2.23e-03 0.00e+00 616.460 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.702 0.229 - - 2.84e-04 4.92e-05 90.540 57
CPL 1.000 0.000 50.0 0.0 2.23e-03 0.00e+00 616.460 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 376.000 0.000 376.000
T90 376.000 0.000 376.000
T50 376.000 0.000 376.000
Peak 376.000 0.000 376.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.4350 +53.3207 0.0043 0.1 -156.9 10.7288 44.6 TRIG_00650416
------------------------------------------
Foreground time interval of the image:
0.000 303.056 (delta_t = 303.056 [sec])
Background time interval of the image:
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 0.000 sec. to 303.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.70155 ( -0.226532 0.230684 )
Norm@50keV : 2.84058E-04 ( -4.65319e-05 5.19497e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.54 using 59 PHA bins.
# Reduced chi-squared = 1.588 for 57 degrees of freedom
# Null hypothesis probability = 3.106734e-03
Photon flux (15-150 keV) in 303.1 sec: 0.330649 ( -0.0234999 0.0240775 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29382e-06 ( -1.94222e-07 1.97287e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 303.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.23311E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 616.46 using 59 PHA bins.
# Reduced chi-squared = 11.008 for 56 degrees of freedom
# Null hypothesis probability = 2.186031e-95
Photon flux (15-150 keV) in 303.1 sec: 0.327966 ( -0.027164 0.025845 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26217e-06 ( -2.43414e-07 2.3857e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 303.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47066 ( )
beta : -8.80960 ( )
Epeak [keV] : 31.7755 ( )
Norm@50keV : 1.93837E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 515.35 using 59 PHA bins.
# Reduced chi-squared = 9.3699 for 55 degrees of freedom
# Null hypothesis probability = 5.186217e-76
Photon flux (15-150 keV) in 303.1 sec: 0.338623 ( 6.66138 -0.027919 ) 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] : 3.82395 ( )
R^2/D10^2 : 8.77031 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 146.08 using 59 PHA bins.
# Reduced chi-squared = 2.5628 for 57 degrees of freedom
# Null hypothesis probability = 9.301538e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.936e-06 2.263e-07
25- 50 6.135e-07 6.608e-08
50-150 5.647e-09 2.213e-09
15-150 2.555e-06 2.201e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.17820 (-0.853105 0.991078)
Norm : 15.4364 (-4.30334 6.25859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.10 using 59 PHA bins.
# Reduced chi-squared = 1.9316 for 57 degrees of freedom
# Null hypothesis probability = 3.099235e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.125e-06 2.008e-07
25- 50 6.832e-07 7.062e-08
50-150 2.585e-08 8.514e-09
15-150 2.834e-06 2.043e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.27884 (-0.224521 0.231631)
R1^2/D10^2 : 247.172 (-127.437 282.556)
kT2 [keV] : 6.32939 (-0.69212 0.814799)
R2^2/D10^2 : 0.329053 (-0.161644 0.312465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.04 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 55 degrees of freedom
# Null hypothesis probability = 3.754591e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.611e-06 1.001e-06
25- 50 7.398e-07 2.665e-07
50-150 7.242e-08 3.851e-08
15-150 3.423e-06 9.827e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 303.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.70155 ( -0.226532 0.230684 )
Norm@50keV : 2.84058E-04 ( -4.65319e-05 5.19497e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.54 using 59 PHA bins.
# Reduced chi-squared = 1.588 for 57 degrees of freedom
# Null hypothesis probability = 3.106734e-03
Photon flux (15-150 keV) in 303.1 sec: 0.330649 ( -0.0234999 0.0240775 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.29382e-06 ( -1.94222e-07 1.97287e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 303.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.23311E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 616.46 using 59 PHA bins.
# Reduced chi-squared = 11.008 for 56 degrees of freedom
# Null hypothesis probability = 2.186031e-95
Photon flux (15-150 keV) in 303.1 sec: 0.327966 ( -0.027164 0.025845 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26217e-06 ( -2.43414e-07 2.3857e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 303.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.47066 ( )
beta : -8.80960 ( )
Epeak [keV] : 31.7755 ( )
Norm@50keV : 1.93837E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 515.35 using 59 PHA bins.
# Reduced chi-squared = 9.3699 for 55 degrees of freedom
# Null hypothesis probability = 5.186217e-76
Photon flux (15-150 keV) in 303.1 sec: 0.338623 ( 6.66138 -0.027919 ) 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] : 3.82395 ( )
R^2/D10^2 : 8.77031 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 146.08 using 59 PHA bins.
# Reduced chi-squared = 2.5628 for 57 degrees of freedom
# Null hypothesis probability = 9.301538e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.936e-06 2.064e-07
25- 50 6.135e-07 6.562e-08
50-150 5.647e-09 2.152e-09
15-150 2.555e-06 2.396e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.17820 (-0.853105 0.991078)
Norm : 15.4364 (-4.30334 6.25859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 110.10 using 59 PHA bins.
# Reduced chi-squared = 1.9316 for 57 degrees of freedom
# Null hypothesis probability = 3.099235e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.125e-06 2.060e-07
25- 50 6.832e-07 6.865e-08
50-150 2.585e-08 9.193e-09
15-150 2.834e-06 2.135e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.27884 (-0.224521 0.231631)
R1^2/D10^2 : 247.172 (-127.437 282.556)
kT2 [keV] : 6.32939 (-0.69212 0.814799)
R2^2/D10^2 : 0.329053 (-0.161644 0.312465)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.04 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 55 degrees of freedom
# Null hypothesis probability = 3.754591e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.611e-06 1.024e-06
25- 50 7.398e-07 2.688e-07
50-150 7.242e-08 4.366e-08
15-150 3.423e-06 1.173e-06
Plot creation:
Mon Jul 27 21:50:57 EDT 2015