batgrbproduct Analysis for Trigger=585149
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): Thu Jan 30 00:54:09 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger585149/GCN5_download_cron
======================================================================
Trigger: 00585149 Segment: 000
BAT Trigger Time: 412692681.024 [s; MET]
Trigger Stop: 412692682.048 [s; MET]
UTC: 2014-01-29T12:51:09.445000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.763234774959 Dec: 26.2066742011522 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.65
Image Trigger?: NO
Rate S/N Ratio: 12.7279220613579 [ if not an image trigger ]
Image S/N Ratio: 7.65
Flight Position: [ source = BAT ]
RA: 326.763234774959 Dec: 26.2066742011522 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 326.763809315638 Dec: 26.2147531843839 [deg; J2000]
{ 21h 47m 03.3s , +26d 12' 53.1" }
+/- 2.05384322233346 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05104664119103 [arcmin] (formal 1-sigma fit error)
SNR: 10.8791178452191
Angular difference between Flight and Ground position is 0.485725 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.35999995470047 +/- 0.212941257677667
Measured from: 0.172000110149384
to: 1.53200006484985 [s; relative to TRIGTIME]
T50: 0.843999922275543 +/- 0.233649336427531
Measured from: 0.340000152587891
to: 1.18400007486343 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.171999990940094
to: 1.17199999094009 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0760000348091125
to: 1.58799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.067578 0.050921 0.030679 0.005098
0.008228 0.008206 0.006799 0.006021 [error]
Peak 0.047543 0.037776 0.022527 -0.001837
0.006614 0.006802 0.005548 0.004802 [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 1.91e-08 2.26e-08 1.92e-08 2.78e-08 7.08e-08 8.87e-08 erg/cm2
Error 3.81e-09 3.72e-09 6.25e-09 1.76e-08 1.41e-08 2.54e-08 erg/cm2
Peak flux Power-law 4.50e-01 2.95e-01 1.26e-01 7.32e-02 9.07e-01 9.44e-01 ph/cm2/s
Error 9.98e-02 5.34e-02 4.35e-02 4.71e-02 1.54e-01 1.64e-01 ph/cm2/s
Fluence Cutoff-PL 1.92e-08 2.25e-08 1.90e-08 2.71e-08 7.02e-08 8.78e-08 erg/cm2
Error 3.81e-09 3.92e-09 4.17e-09 2.07e-08 1.44e-08 2.85e-08 erg/cm2
Peak flux Cutoff-PL 4.51e-01 2.96e-01 1.25e-01 6.97e-02 9.07e-01 9.45e-01 ph/cm2/s
Error 1.02e-01 6.19e-02 4.74e-02 5.28e-02 1.56e-01 1.74e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 9.23e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.230 0.331 - - 4.96e-03 1.17e-03 49.350 57
CPL 2.395 0.000 158.5 0.0 3.99e-03 0.00e+00 49.160 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.232 0.358 - - 5.39e-03 1.41e-03 66.230 57
CPL 1.977 0.000 3.6 0.0 7.65e-03 0.00e+00 66.330 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 1.512 0.076 1.588
T90 1.360 0.172 1.532
T50 0.844 0.340 1.184
Peak 1.000 0.172 1.172
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
326.7638 +26.2148 0.0177 13.8 -167.8 0.1590 10.9 TRIG_00585149
------------------------------------------
Foreground time interval of the image:
0.076 1.588 (delta_t = 1.512 [sec])
Background time interval of the image:
-239.024 0.076 (delta_t = 239.100 [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 0.076 sec. to 1.588 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23047 ( -0.313089 0.349516 )
Norm@50keV : 4.95548E-03 ( -0.00118641 0.00114478 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.35 using 59 PHA bins.
# Reduced chi-squared = 0.8658 for 57 degrees of freedom
# Null hypothesis probability = 7.541979e-01
Photon flux (15-150 keV) in 1.512 sec: 0.833764 ( -0.126284 0.126295 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.07637e-08 ( -1.37796e-08 1.44211e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.076 sec. to 1.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.39531 ( )
Epeak [keV] : 158.475 ( )
Norm@50keV : 3.99149E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.16 using 59 PHA bins.
# Reduced chi-squared = 0.8778 for 56 degrees of freedom
# Null hypothesis probability = 7.295030e-01
Photon flux (15-150 keV) in 1.512 sec: 0.833106 ( -0.126106 0.126202 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.01946e-08 ( -1.40584e-08 1.47332e-08 ) ergs/cm2
Band function
Time interval is from 0.076 sec. to 1.588 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.99226 -4.99226 )
beta : -2.29613 ( -0.533778 0.338811 )
Epeak [keV] : 17.8589 ( -17.2689 5.9735 )
Norm@50keV : 9743.51 ( -1470.25 1.23908e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.97 using 59 PHA bins.
# Reduced chi-squared = 0.8904 for 55 degrees of freedom
# Null hypothesis probability = 7.029395e-01
Photon flux (15-150 keV) in 1.512 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] : 7.21408 (-1.44328 1.83459)
R^2/D10^2 : 1.33417 (-0.792596 2.0157)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.11 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 57 degrees of freedom
# Null hypothesis probability = 2.412758e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.738e-08 5.352e-09
25- 50 2.522e-08 6.751e-09
50-150 4.655e-09 2.568e-09
15-150 4.726e-08 1.161e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 44.6119 (-16.7774 34.1066)
Norm : 4.98877 (-1.34189 2.13318)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9125 for 57 degrees of freedom
# Null hypothesis probability = 6.621418e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.791e-08 3.450e-09
25- 50 2.465e-08 6.286e-09
50-150 2.140e-08 1.013e-08
15-150 6.397e-08 1.597e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.67146 (-1.21169 1.50001)
R1^2/D10^2 : 6.71195 (-4.57495 18.9029)
kT2 [keV] : 21.3195 (-8.20181 22.3207)
R2^2/D10^2 : 1.42703E-02 (-0.0128113 0.0755221)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.01 using 59 PHA bins.
# Reduced chi-squared = 0.8729 for 55 degrees of freedom
# Null hypothesis probability = 7.364671e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.050e-08 1.073e-08
25- 50 1.981e-08 1.065e-08
50-150 3.269e-08 2.055e-08
15-150 7.299e-08 3.729e-08
Peak spectrum fit
Power-law model
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.23219 ( -0.336397 0.380515 )
Norm@50keV : 5.38574E-03 ( -0.00143247 0.00138873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.23 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 57 degrees of freedom
# Null hypothesis probability = 1.885829e-01
Photon flux (15-150 keV) in 1 sec: 0.906991 ( -0.154365 0.154396 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08786e-08 ( -1.10706e-08 1.16487e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97740 ( )
Epeak [keV] : 3.55056 ( )
Norm@50keV : 7.65169E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.33 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 56 degrees of freedom
# Null hypothesis probability = 1.625053e-01
Photon flux (15-150 keV) in 1 sec: 0.907210 ( -0.157795 0.15337 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.12654e-08 ( -1.34292e-08 1.11625e-08 ) ergs/cm2
Band function
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.98788 ( 2.98788 2.98788 )
beta : -2.23219 ( -0.380515 0.33692 )
Epeak [keV] : 4.16203 ( -4.16203 -4.16203 )
Norm@50keV : 0.731998 ( -0.194693 0.188748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.23 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.428171e-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] : 7.04587 (-1.38204 1.76757)
R^2/D10^2 : 1.63714 (-0.976286 2.38468)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.14 using 59 PHA bins.
# Reduced chi-squared = 1.318 for 57 degrees of freedom
# Null hypothesis probability = 5.402232e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.314e-08 4.265e-09
25- 50 1.823e-08 5.545e-09
50-150 3.093e-09 1.852e-09
15-150 3.447e-08 1.104e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.1118 (-16.9941 35.9924)
Norm : 5.58706 (-1.62231 2.64377)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.47 using 59 PHA bins.
# Reduced chi-squared = 1.184 for 57 degrees of freedom
# Null hypothesis probability = 1.615556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.314e-08 3.090e-09
25- 50 1.784e-08 4.695e-09
50-150 1.495e-08 7.723e-09
15-150 4.592e-08 1.324e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.09879 (-1.34716 1.55551)
R1^2/D10^2 : 5.15939 (-3.39504 6.05606)
kT2 [keV] : 22.9174 (-9.72069 26.8075)
R2^2/D10^2 : 1.12686E-02 (-0.0102587 0.0790427)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.17 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 55 degrees of freedom
# Null hypothesis probability = 1.860415e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.464e-08 7.878e-09
25- 50 1.511e-08 8.040e-09
50-150 2.324e-08 1.449e-08
15-150 5.298e-08 2.945e-08
Plot creation:
Thu Jan 30 01:20:52 EST 2014