batgrbproduct Analysis for Trigger=648437
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): Fri Jul 10 20:04:35 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger648437/GCN5_download_cron
======================================================================
Trigger: 00648437 Segment: 000
BAT Trigger Time: 458180897.568 [s; MET]
Trigger Stop: 458180897.6 [s; MET]
UTC: 2015-07-10T00:28:02.736460 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 194.497391403333 Dec: 14.3051430419731 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.75
Image Trigger?: NO
Rate S/N Ratio: 48.6929152957594 [ if not an image trigger ]
Image S/N Ratio: 9.75
Flight Position: [ source = BAT ]
RA: 194.497391403333 Dec: 14.3051430419731 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 194.484991459053 Dec: 14.3099763583423 [deg; J2000]
{ 12h 57m 56.4s , +14d 18' 35.9" }
+/- 1.48984682704073 [arcmin] (estimated 90% radius based on SNR)
+/- 0.607414613816081 [arcmin] (formal 1-sigma fit error)
SNR: 17.2096963653283
Angular difference between Flight and Ground position is 0.777062 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.151999950408936 +/- 0.0601331884316159
Measured from: 0.0160000920295715
to: 0.168000042438507 [s; relative to TRIGTIME]
T50: 0.0479999780654907 +/- 0.0144221847352656
Measured from: 0.0200001001358032
to: 0.0680000782012939 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.378000020980835
to: 0.621999979019165 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.015999972820282
to: 0.223999977111816 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.012393 0.027923 0.039895 0.019654
0.002778 0.003342 0.003644 0.002799 [error]
Peak 0.009930 0.036868 0.038792 0.021147
0.005163 0.005548 0.005377 0.004433 [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 3.22e-09 1.01e-08 2.60e-08 1.93e-07 7.08e-08 2.32e-07 erg/cm2
Error 8.18e-10 1.53e-09 3.11e-09 5.56e-08 8.85e-09 5.68e-08 erg/cm2
Peak flux Power-law 1.18e-01 1.97e-01 2.49e-01 6.26e-01 7.39e-01 1.19e+00 ph/cm2/s
Error 4.57e-02 4.63e-02 3.95e-02 2.30e-01 1.21e-01 2.31e-01 ph/cm2/s
Fluence Cutoff-PL 3.02e-09 1.03e-08 2.68e-08 1.41e-07 7.02e-08 1.81e-07 erg/cm2
Error 1.02e-09 1.64e-09 3.94e-09 -------- 9.27e-09 8.66e-08 erg/cm2
Peak flux Cutoff-PL 1.18e-01 1.97e-01 2.49e-01 6.22e-01 7.39e-01 1.19e+00 ph/cm2/s
Error 4.27e-02 4.71e-02 4.25e-02 4.41e-01 1.21e-01 3.38e-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 0.635 0.205 - - 2.71e-02 3.25e-03 55.900 57
CPL 0.394 0.700 403.9 0.0 3.43e-02 3.04e-02 55.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.664 0.299 - - 6.37e-03 1.11e-03 41.800 57
CPL 0.657 0.302 9999.4 0.0 6.42e-03 8.97e-03 41.800 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.208 0.016 0.224
T90 0.152 0.016 0.168
T50 0.048 0.020 0.068
Peak 1.000 -0.378 0.622
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
194.4850 +14.3100 0.0111 5.7 52.9 0.1024 17.2 TRIG_00648437
------------------------------------------
Foreground time interval of the image:
0.016 0.224 (delta_t = 0.208 [sec])
Background time interval of the image:
-239.568 -56.728 (delta_t = 182.840 [sec])
-55.568 0.016 (delta_t = 55.584 [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 0.016 sec. to 0.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.635088 ( -0.209984 0.200264 )
Norm@50keV : 2.70739E-02 ( -0.00326808 0.00322198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.90 using 59 PHA bins.
# Reduced chi-squared = 0.9806 for 57 degrees of freedom
# Null hypothesis probability = 5.165490e-01
Photon flux (15-150 keV) in 0.208 sec: 3.14839 ( -0.359002 0.359303 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.08236e-08 ( -8.82752e-09 8.88035e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.016 sec. to 0.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.394310 ( -0.982505 0.417184 )
Epeak [keV] : 403.882 ( -403.81 -403.81 )
Norm@50keV : 3.42512E-02 ( -0.00993706 0.0508913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.66 using 59 PHA bins.
# Reduced chi-squared = 0.9939 for 56 degrees of freedom
# Null hypothesis probability = 4.877983e-01
Photon flux (15-150 keV) in 0.208 sec: 3.12746 ( -0.36755 0.36634 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.0231e-08 ( -9.37206e-09 9.17322e-09 ) ergs/cm2
Band function
Time interval is from 0.016 sec. to 0.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.932750 ( 0.93275 0.93275 )
beta : -0.635090 ( -0.200075 0.210672 )
Epeak [keV] : 15.3572 ( -15.356 -15.356 )
Norm@50keV : 3.80892E-02 ( -0.0141514 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.90 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.409772e-01
Photon flux (15-150 keV) in 0.208 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] : 27.4127 (-4.245 5.68913)
R^2/D10^2 : 6.35685E-02 (-0.0259732 0.0395326)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.850899e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.640e-09 3.734e-10
25- 50 9.729e-09 1.869e-09
50-150 5.320e-08 9.963e-09
15-150 6.457e-08 1.015e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 11.1104 (-1.42783 1.4296)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.61 using 59 PHA bins.
# Reduced chi-squared = 1.8704 for 57 degrees of freedom
# Null hypothesis probability = 7.530931e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.751e-09 3.228e-09
25- 50 1.106e-08 6.226e-09
50-150 2.426e-08 1.338e-08
15-150 4.108e-08 2.288e-08
Double BB
R1^2/D10^2 : 0.182008 ( )
kT2 [keV] : 195.613 ( )
R2^2/D10^2 : 6.68325E-04 (-0.000344062 0.0337858)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.38 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.13 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.602409e-01
# Null hypothesis probability = 4.697569e-01
# Null hypothesis probability = 4.703867e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.419e-09 1.422e-09
25- 50 1.101e-08 6.081e-09
50-150 5.583e-08 3.683e-08
15-150 6.926e-08 3.698e-08
Peak spectrum fit
Power-law model
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.663957 ( -0.31409 0.284539 )
Norm@50keV : 6.37111E-03 ( -0.00113304 0.00109642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.80 using 59 PHA bins.
# Reduced chi-squared = 0.7334 for 57 degrees of freedom
# Null hypothesis probability = 9.344954e-01
Photon flux (15-150 keV) in 1 sec: 0.738743 ( -0.120699 0.121471 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.90577e-08 ( -1.3132e-08 1.32077e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.657366 ( -0.3181 0.285767 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 6.42436E-03 ( -0.000583976 0.0173464 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.80 using 59 PHA bins.
# Reduced chi-squared = 0.7465 for 56 degrees of freedom
# Null hypothesis probability = 9.208416e-01
Photon flux (15-150 keV) in 1 sec: 0.738677 ( -0.122124 0.120834 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.90735e-08 ( -1.39451e-08 1.31843e-08 ) ergs/cm2
Band function
Time interval is from -0.378 sec. to 0.622 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.813415 ( 0.813415 0.813415 )
beta : -0.663957 ( -0.28455 0.31408 )
Epeak [keV] : 16.3371 ( -16.3371 -16.3371 )
Norm@50keV : 9.10241E-03 ( -0.0037288 89250.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.80 using 59 PHA bins.
# Reduced chi-squared = 0.7600 for 55 degrees of freedom
# Null hypothesis probability = 9.050635e-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] : 26.6572 (-5.69458 9.12786)
R^2/D10^2 : 1.58218E-02 (-0.0089198 0.0165958)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.82 using 59 PHA bins.
# Reduced chi-squared = 0.8214 for 57 degrees of freedom
# Null hypothesis probability = 8.298609e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.886e-09 7.001e-10
25- 50 1.104e-08 3.420e-09
50-150 5.749e-08 1.868e-08
15-150 7.042e-08 1.897e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.82933 (-0.502717 0.502699)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.09 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 57 degrees of freedom
# Null hypothesis probability = 1.695068e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.044e-09 4.072e-09
25- 50 1.355e-08 7.670e-09
50-150 2.972e-08 1.688e-08
15-150 5.031e-08 2.873e-08
Double BB
R1^2/D10^2 : 6.00825E-02 ( )
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 1.67699E-04 (-8.02049e-05 0.00264826)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.59 using 59 PHA bins.
#Fit statistic : Chi-Squared = 39.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.93 using 59 PHA bins.
# Reduced chi-squared = 0.7198 for 55 degrees of freedom
# Reduced chi-squared = 0.7108 for 55 degrees of freedom
# Reduced chi-squared = 0.7078 for 55 degrees of freedom
# Null hypothesis probability = 9.416831e-01
# Null hypothesis probability = 9.482673e-01
# Null hypothesis probability = 9.503796e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.149e-09 1.906e-09
25- 50 1.305e-08 7.665e-09
50-150 6.221e-08 3.373e-08
15-150 7.841e-08 4.899e-08
Plot creation:
Fri Jul 10 20:08:08 EDT 2015