batgrbproduct Analysis for Trigger=657564
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 Oct 5 09:05:34 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger657564/GCN5_download_cron
======================================================================
Trigger: 00657564 Segment: 000
BAT Trigger Time: 465674960 [s; MET]
Trigger Stop: 465675032 [s; MET]
UTC: 2015-10-04T18:09:04.774100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 213.584663525959 Dec: -64.9473172592527 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.34
Flight Position: [ source = BAT ]
RA: 213.584663525959 Dec: -64.9473172592527 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 213.612976786254 Dec: -64.9564772971798 [deg; J2000]
{ 14h 14m 27.1s , -64d 57' 23.3" }
+/- 2.33832317496518 [arcmin] (estimated 90% radius based on SNR)
+/- 1.40404743915302 [arcmin] (formal 1-sigma fit error)
SNR: 9.0388234346842
Angular difference between Flight and Ground position is 0.905185 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 128.399999976158 +/- 17.7669412647361
Measured from: -0.275999903678894
to: 128.124000072479 [s; relative to TRIGTIME]
T50: 58.9799999594688 +/- 18.449010654911
Measured from: 22.0760000944138
to: 81.0560000538826 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 50.8600000143051
to: 51.8600000143051 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.6320000290871
to: 134.424000024796 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.737369 0.697690 0.404867 0.178319
0.079842 0.075031 0.062817 0.053943 [error]
Peak 0.029842 0.013327 0.008509 0.009053
0.006709 0.006198 0.005122 0.004318 [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 2.15e-07 3.00e-07 3.11e-07 5.89e-07 1.01e-06 1.42e-06 erg/cm2
Error 3.66e-08 3.41e-08 6.16e-08 2.37e-07 1.39e-07 3.00e-07 erg/cm2
Peak flux Power-law 2.15e-01 1.37e-01 5.62e-02 3.13e-02 4.24e-01 4.40e-01 ph/cm2/s
Error 1.04e-01 5.36e-02 4.42e-02 5.66e-02 1.46e-01 1.55e-01 ph/cm2/s
Fluence Cutoff-PL 2.16e-07 3.01e-07 3.10e-07 5.80e-07 1.01e-06 1.41e-06 erg/cm2
Error 3.74e-08 3.41e-08 6.08e-08 4.26e-07 1.47e-07 4.05e-07 erg/cm2
Peak flux Cutoff-PL 2.21e-01 1.35e-01 5.27e-02 2.74e-02 4.23e-01 4.36e-01 ph/cm2/s
Error 9.85e-02 5.37e-02 4.77e-02 5.63e-02 1.45e-01 1.54e-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 1.951 0.226 - - 7.43e-04 1.05e-04 40.510 57
CPL 1.957 0.227 9999.4 0.0 7.41e-04 0.00e+00 40.510 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.284 0.947 - - 2.45e-03 1.92e-03 60.220 57
CPL 1.765 0.000 23.0 0.0 4.48e-03 0.00e+00 61.100 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: 73.216000 sec.
T50 in the 50-300 keV band: 38.784000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 148.056 -13.632 134.424
T90 128.400 -0.276 128.124
T50 58.980 22.076 81.056
Peak 1.000 50.860 51.860
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
213.6130 -64.9565 0.0213 16.0 -166.4 1.5859 9.0 TRIG_00657564
------------------------------------------
Foreground time interval of the image:
-13.632 134.424 (delta_t = 148.056 [sec])
Background time interval of the image:
-204.899 -13.632 (delta_t = 191.267 [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 -13.632 sec. to 134.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95129 ( -0.220308 0.231348 )
Norm@50keV : 7.43250E-04 ( -0.000107015 0.000103906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.51 using 59 PHA bins.
# Reduced chi-squared = 0.7107 for 57 degrees of freedom
# Null hypothesis probability = 9.516220e-01
Photon flux (15-150 keV) in 148.1 sec: 0.109063 ( -0.0124414 0.0124509 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01302e-06 ( -1.37693e-07 1.40916e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.632 sec. to 134.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95672 ( -0.225328 0.22894 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 7.40698E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.51 using 59 PHA bins.
# Reduced chi-squared = 0.7234 for 56 degrees of freedom
# Null hypothesis probability = 9.407200e-01
Photon flux (15-150 keV) in 148.1 sec: 0.109047 ( -0.0125158 0.012429 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01163e-06 ( -1.53531e-07 1.40191e-07 ) ergs/cm2
Band function
Time interval is from -13.632 sec. to 134.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95326 ( -4.95326 -4.95326 )
beta : -1.98048 ( -0.254455 0.231902 )
Epeak [keV] : 17.9756 ( -17.9756 5.61411 )
Norm@50keV : 933.443 ( -105.648 998109 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.35 using 59 PHA bins.
# Reduced chi-squared = 0.7336 for 55 degrees of freedom
# Null hypothesis probability = 9.305564e-01
Photon flux (15-150 keV) in 148.1 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] : 10.3625 (-1.46202 1.69885)
R^2/D10^2 : 4.29572E-02 (-0.0188203 0.0340287)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.969130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-07 2.948e-08
25- 50 3.676e-07 6.383e-08
50-150 2.125e-07 6.425e-08
15-150 7.207e-07 1.206e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.3066 (-24.2623 47.3292)
Norm : 0.519072 (-0.0900946 0.11369)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.33 using 59 PHA bins.
# Reduced chi-squared = 0.7427 for 57 degrees of freedom
# Null hypothesis probability = 9.263407e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.984e-07 3.192e-08
25- 50 3.206e-07 4.088e-08
50-150 4.301e-07 1.853e-07
15-150 9.490e-07 1.784e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.39026 (-1.4164 2.20101)
R1^2/D10^2 : 0.832554 (-0.650511 2.35937)
kT2 [keV] : 16.6331 (-3.96003 10.8064)
R2^2/D10^2 : 5.72423E-03 (-0.00487884 0.0114544)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.30 using 59 PHA bins.
# Reduced chi-squared = 0.7691 for 55 degrees of freedom
# Null hypothesis probability = 8.951442e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.210e-07 1.116e-07
25- 50 2.897e-07 1.201e-07
50-150 4.113e-07 2.386e-07
15-150 9.220e-07 3.548e-07
Peak spectrum fit
Power-law model
Time interval is from 50.860 sec. to 51.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28409 ( -0.828274 1.06492 )
Norm@50keV : 2.45031E-03 ( -0.00244936 0.00138745 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.22 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 57 degrees of freedom
# Null hypothesis probability = 3.599077e-01
Photon flux (15-150 keV) in 1 sec: 0.424449 ( -0.145961 0.145898 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.33419e-08 ( -1.04568e-08 1.19983e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 50.860 sec. to 51.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76467 ( )
Epeak [keV] : 22.9511 ( )
Norm@50keV : 4.47871E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.10 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 56 degrees of freedom
# Null hypothesis probability = 2.980026e-01
Photon flux (15-150 keV) in 1 sec: 0.423285 ( -0.145295 0.145469 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.28923e-08 ( -1.01395e-08 1.24509e-08 ) ergs/cm2
Band function
Time interval is from 50.860 sec. to 51.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.80678 ( 1.53756 1.53756 )
beta : -2.36684 ( 2.31373 0.853137 )
Epeak [keV] : 18.0014 ( -12.9123 -12.9123 )
Norm@50keV : 7.48949 ( -8.3863 1784.65 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.12 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 55 degrees of freedom
# Null hypothesis probability = 2.956931e-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] : 5.15693 (-1.70301 3.34304)
R^2/D10^2 : 2.80170 (-2.8017 16.3531)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.16 using 59 PHA bins.
# Reduced chi-squared = 1.108 for 57 degrees of freedom
# Null hypothesis probability = 2.677744e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.698e-09 4.699e-09
25- 50 5.422e-09 3.545e-09
50-150 2.555e-10 2.596e-10
15-150 1.338e-08 8.490e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 33.2100 (-23.4537 -33.5741)
Norm : 3.01898 (-1.82649 8.85627)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.83 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.078676e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.449e-09 4.025e-09
25- 50 7.777e-09 4.912e-09
50-150 4.846e-09 4.102e-09
15-150 1.907e-08 1.259e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.61303 (-1.50964 2.43178)
R1^2/D10^2 : 4.39174 (-3.67369 28.1316)
kT2 [keV] : 85.4333 (-74.8896 -93.3385)
R2^2/D10^2 : 2.60227E-04 (-0.000197083 0.00605946)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.72 using 59 PHA bins.
#Fit statistic : Chi-Squared = 56.68 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Reduced chi-squared = 1.031 for 55 degrees of freedom
# Null hypothesis probability = 4.107791e-01
# Null hypothesis probability = 4.122293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.780e-09 4.646e-09
25- 50 5.165e-09 3.034e-09
50-150 1.928e-08 1.112e-08
15-150 3.222e-08 1.643e-08
Plot creation:
Mon Oct 5 09:11:15 EDT 2015