batgrbproduct Analysis for Trigger=633237
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): Tue Mar 3 04:06:10 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger633237/GCN5_download_cron
======================================================================
Trigger: 00633237 Segment: 000
BAT Trigger Time: 446967769.92 [s; MET]
Trigger Stop: 446967775.424 [s; MET]
UTC: 2015-03-02T05:42:36.665740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 175.508317651857 Dec: 36.8269551392691 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.58
Image Trigger?: NO
Rate S/N Ratio: 12.0415945787923 [ if not an image trigger ]
Image S/N Ratio: 6.58
Flight Position: [ source = BAT ]
RA: 175.508317651857 Dec: 36.8269551392691 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 175.515028490924 Dec: 36.8517535492648 [deg; J2000]
{ 11h 42m 03.6s , +36d 51' 06.3" }
+/- 2.80059279318894 [arcmin] (estimated 90% radius based on SNR)
+/- 1.59361772277976 [arcmin] (formal 1-sigma fit error)
SNR: 6.98537709549469
Angular difference between Flight and Ground position is 1.522401 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 23.744000017643 +/- 8.79109375676233
Measured from: -0.311999917030334
to: 23.4320001006126 [s; relative to TRIGTIME]
T50: 8.63999998569489 +/- 5.43359625375122
Measured from: 3.20800012350082
to: 11.8480001091957 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.61199998855591
to: 3.61199998855591 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.14399999380112
to: 28.2319999933243 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.115139 0.207184 0.099932 0.064645
0.027691 0.029139 0.025836 0.024028 [error]
Peak 0.010355 0.022795 0.016515 0.004616
0.005250 0.005462 0.004981 0.004431 [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 4.23e-08 6.95e-08 8.64e-08 2.13e-07 2.58e-07 4.11e-07 erg/cm2
Error 1.12e-08 1.24e-08 2.44e-08 1.23e-07 5.74e-08 1.47e-07 erg/cm2
Peak flux Power-law 1.18e-01 1.31e-01 1.03e-01 1.35e-01 4.03e-01 4.88e-01 ph/cm2/s
Error 5.92e-02 4.23e-02 3.86e-02 1.04e-01 1.22e-01 1.56e-01 ph/cm2/s
Fluence Cutoff-PL 3.96e-08 7.62e-08 8.43e-08 6.17e-08 2.36e-07 2.62e-07 erg/cm2
Error 1.27e-08 1.89e-08 3.11e-08 1.66e-07 6.94e-08 1.88e-07 erg/cm2
Peak flux Cutoff-PL 1.02e-01 1.41e-01 1.11e-01 6.17e-02 3.92e-01 4.15e-01 ph/cm2/s
Error 6.80e-02 5.02e-02 4.53e-02 8.94e-02 9.32e-02 1.74e-01 ph/cm2/s
Fluence Band 3.59e-08 8.20e-08 7.83e-08 1.19e-07 2.40e-07 3.21e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.04e-01 1.38e-01 1.11e-01 7.42e-02 3.95e-01 4.28e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.23e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.686 0.325 - - 9.48e-04 1.97e-04 61.430 57
CPL 0.928 1.871 60.4 -10.3 2.56e-03 3.75e-02 60.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.338 0.511 - - 3.35e-03 1.03e-03 57.270 57
CPL 0.553 1.377 94.0 0.0 8.26e-03 6.22e-02 56.670 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 29.376 -1.144 28.232
T90 23.744 -0.312 23.432
T50 8.640 3.208 11.848
Peak 1.000 2.612 3.612
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
175.5150 +36.8518 0.0277 12.4 172.8 0.4604 7.0 TRIG_00633237
------------------------------------------
Foreground time interval of the image:
-1.144 28.232 (delta_t = 29.376 [sec])
Background time interval of the image:
-60.920 -1.144 (delta_t = 59.776 [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 -1.144 sec. to 28.232 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68601 ( -0.315222 0.335433 )
Norm@50keV : 9.47783E-04 ( -0.000200578 0.000194288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.43 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.203450e-01
Photon flux (15-150 keV) in 29.38 sec: 0.125267 ( -0.0224377 0.0224386 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58115e-07 ( -5.6278e-08 5.84327e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.144 sec. to 28.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.927874 ( -2.4547 1.28792 )
Epeak [keV] : 60.3745 ( -39.8159 -60.4385 )
Norm@50keV : 2.56172E-03 ( -0.00255326 0.0724444 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.70 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 56 degrees of freedom
# Null hypothesis probability = 3.102282e-01
Photon flux (15-150 keV) in 29.38 sec: 0.121523 ( -0.0239207 0.023645 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.36288e-07 ( -6.70651e-08 7.17615e-08 ) ergs/cm2
Band function
Time interval is from -1.144 sec. to 28.232 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.69374 ( -0.486064 -0.486064 )
beta : -2.22594 ( 2.13569 0.641825 )
Epeak [keV] : 37.2124 ( -39.2539 25.0923 )
Norm@50keV : 0.131020 ( -0.128867 8.53319 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.63 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.111955e-01
Photon flux (15-150 keV) in 29.38 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3968e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0266 (-1.97215 2.60946)
R^2/D10^2 : 4.23851E-02 (-0.0230277 0.0450133)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.54 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 57 degrees of freedom
# Null hypothesis probability = 2.570904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.165e-08 9.961e-09
25- 50 8.977e-08 2.619e-08
50-150 6.177e-08 2.640e-08
15-150 1.832e-07 5.942e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 122.614 (-61.8827 -121.317)
Norm : 0.533105 (-0.107364 0.152674)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.83 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 57 degrees of freedom
# Null hypothesis probability = 3.399181e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.076e-08 2.352e-08
25- 50 7.319e-08 4.106e-08
50-150 1.320e-07 8.817e-08
15-150 2.459e-07 1.523e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.15075 (-1.14206 1.75671)
R1^2/D10^2 : 1.17374E+04 (-13711.2 -13713.9)
kT2 [keV] : 11.9448 (-2.30717 2.40106)
R2^2/D10^2 : 3.03901E-02 (-0.0180789 0.0216987)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.25 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 55 degrees of freedom
# Null hypothesis probability = 3.232013e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.313e-08 1.306e-08
25- 50 8.431e-08 3.076e-08
50-150 7.210e-08 3.611e-08
15-150 1.895e-07 7.376e-08
Peak spectrum fit
Power-law model
Time interval is from 2.612 sec. to 3.612 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33844 ( -0.508028 0.514621 )
Norm@50keV : 3.34917E-03 ( -0.00103198 0.00102146 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.650101e-01
Photon flux (15-150 keV) in 1 sec: 0.402531 ( -0.12169 0.121898 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27979e-08 ( -1.1095e-08 1.14982e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.612 sec. to 3.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.553473 ( -1.5243 1.23051 )
Epeak [keV] : 94.0031 ( -93.9571 -93.9571 )
Norm@50keV : 8.25791E-03 ( -0.0082663 0.116201 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.67 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.498686e-01
Photon flux (15-150 keV) in 1 sec: 0.391939 ( -0.123396 0.063057 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.11883e-08 ( -1.15005e-08 1.20419e-08 ) ergs/cm2
Band function
Time interval is from 2.612 sec. to 3.612 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.602181 ( -0.881239 2.73254 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 97.9230 ( -50.399 -97.9178 )
Norm@50keV : 7.75555E-03 ( -0.00775613 0.117078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.67 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.124157e-01
Photon flux (15-150 keV) in 1 sec: 0.395091 ( 6.60491 -0.125229 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04594e-15 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.3289 (-6.13977 8.87631)
R^2/D10^2 : 2.95281E-02 (-0.0294815 0.0982766)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.60 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.163983e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.796e-09 1.119e-09
25- 50 8.068e-09 4.789e-09
50-150 1.740e-08 1.159e-08
15-150 2.727e-08 1.688e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-123.216 -199.362)
Norm : 1.65632 (-0.498006 0.498635)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 57 degrees of freedom
# Null hypothesis probability = 4.601578e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.124e-09 2.553e-09
25- 50 7.934e-09 4.851e-09
50-150 1.740e-08 1.066e-08
15-150 2.946e-08 1.840e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.74202 (-6.46389 13.5708)
R1^2/D10^2 : 0.398591 (-0.201822 -0.409355)
kT2 [keV] : 25.1454 (-25.0962 -25.0964)
R2^2/D10^2 : 6.91681E-03 (-0.00696219 0.0416312)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.88 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.417513e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.552e-09 2.418e-09
25- 50 7.864e-09 4.358e-09
50-150 2.070e-08 1.344e-08
15-150 3.212e-08 1.763e-08
Plot creation:
Tue Mar 3 04:09:42 EST 2015