batgrbproduct Analysis for Trigger=642453
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 Jun 4 23:36:27 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger642453/GCN5_download_cron
======================================================================
Trigger: 00642453 Segment: 000
BAT Trigger Time: 455079624 [s; MET]
Trigger Stop: 455079688 [s; MET]
UTC: 2015-06-04T03:00:10.329640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 238.343220351472 Dec: -46.6223945171144 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.31
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.31
Flight Position: [ source = BAT ]
RA: 238.343220351472 Dec: -46.6223945171144 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 238.30710559739 Dec: -46.6185671212177 [deg; J2000]
{ 15h 53m 13.7s , -46d 37' 06.8" }
+/- 3.45870221849513 [arcmin] (estimated 90% radius based on SNR)
+/- 2.12200504524274 [arcmin] (formal 1-sigma fit error)
SNR: 5.16704708759606
Angular difference between Flight and Ground position is 1.505890 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.269151 0.200629 0.039249 0.021734
0.054330 0.053267 0.046784 0.045815 [error]
Peak 0.269151 0.200629 0.039249 0.021734
0.054330 0.053267 0.046784 0.045815 [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 7.26e-08 7.36e-08 5.25e-08 5.97e-08 2.22e-07 2.58e-07 erg/cm2
Error 2.30e-08 2.49e-08 3.32e-08 8.07e-08 8.25e-08 1.26e-07 erg/cm2
Peak flux Power-law 3.74e-02 2.11e-02 7.53e-03 3.53e-03 6.79e-02 6.95e-02 ph/cm2/s
Error 1.20e-02 6.89e-03 4.61e-03 4.48e-03 1.93e-02 2.02e-02 ph/cm2/s
Fluence Cutoff-PL 7.51e-08 9.11e-08 5.65e-09 1.56e-12 1.72e-07 1.72e-07 erg/cm2
Error 2.71e-08 3.77e-08 2.21e-08 2.98e-09 5.43e-08 5.42e-08 erg/cm2
Peak flux Cutoff-PL 3.70e-02 2.75e-02 9.80e-04 1.45e-07 6.55e-02 6.55e-02 ph/cm2/s
Error 1.41e-02 1.05e-02 3.36e-03 2.40e-04 1.80e-02 1.80e-02 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 2.486 0.586 - - 3.49e-04 1.66e-04 51.380 57
CPL -3.900 0.696 26.1 8.4 1.27e+01 0.00e+00 46.420 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.486 0.586 - - 3.49e-04 1.66e-04 51.380 57
CPL -3.900 0.696 26.1 8.4 1.27e+01 0.00e+00 46.420 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.3071 -46.6186 0.0375 18.4 18.1 0.5544 5.2 TRIG_00642453
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48558 ( -0.528219 0.643544 )
Norm@50keV : 3.48729E-04 ( -0.000160692 0.000170427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.849826e-01
Photon flux (15-150 keV) in 64 sec: 6.78954E-02 ( -0.0192892 0.01939 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22186e-07 ( -7.74886e-08 8.74899e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.89983 ( 2.5504 3.94275 )
Epeak [keV] : 26.0602 ( -10.667 6.04821 )
Norm@50keV : 12.6844 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 56 degrees of freedom
# Null hypothesis probability = 8.154916e-01
Photon flux (15-150 keV) in 64 sec: 6.55220E-02 ( -0.0179706 0.0180879 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71847e-07 ( -4.98131e-08 5.87155e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.23314 ( -4.82306 -4.23309 )
beta : -4.92522 ( 4.88556 2.29881 )
Epeak [keV] : 25.7915 ( -6.6069 5.38399 )
Norm@50keV : 23.5883 ( -23.6944 15.2498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.29 using 59 PHA bins.
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Null hypothesis probability = 7.921983e-01
Photon flux (15-150 keV) in 64 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] : 6.53075 (-1.40346 1.78279)
R^2/D10^2 : 0.187778 (-0.187778 0.332999)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8211 for 57 degrees of freedom
# Null hypothesis probability = 8.303121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.618e-08 4.474e-08
25- 50 9.085e-08 5.510e-08
50-150 1.163e-08 9.760e-09
15-150 1.787e-07 1.059e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7121 (-11.4498 26.4842)
Norm : 0.621503 (-0.273372 0.52985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.19 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 57 degrees of freedom
# Null hypothesis probability = 7.595172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.591e-08 3.579e-08
25- 50 8.110e-08 4.456e-08
50-150 3.793e-08 3.193e-08
15-150 1.949e-07 1.048e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49832 (-6.5767 193.331)
R1^2/D10^2 : 0.190992 (-0.144823 -0.144823)
kT2 [keV] : 199.990 ( )
R2^2/D10^2 : 6.11680E-07 (-6.1168e-07 -6.1168e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 55 degrees of freedom
# Reduced chi-squared = 0.8506 for 55 degrees of freedom
# Null hypothesis probability = 7.762740e-01
# Null hypothesis probability = 7.769276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.603e-08 7.011e-02
25- 50 9.108e-08 6.243e-01
50-150 1.178e-08 1.517e+01
15-150 1.789e-07 1.627e+01
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.48558 ( -0.528219 0.643544 )
Norm@50keV : 3.48729E-04 ( -0.000160692 0.000170427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.38 using 59 PHA bins.
# Reduced chi-squared = 0.9014 for 57 degrees of freedom
# Null hypothesis probability = 6.849826e-01
Photon flux (15-150 keV) in 64 sec: 6.78954E-02 ( -0.0192892 0.01939 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22186e-07 ( -7.74886e-08 8.74899e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.89983 ( 2.5504 3.94275 )
Epeak [keV] : 26.0602 ( -10.667 6.04821 )
Norm@50keV : 12.6844 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.42 using 59 PHA bins.
# Reduced chi-squared = 0.8290 for 56 degrees of freedom
# Null hypothesis probability = 8.154916e-01
Photon flux (15-150 keV) in 64 sec: 6.55220E-02 ( -0.0179706 0.0180879 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71847e-07 ( -4.98131e-08 5.87155e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.23314 ( -4.82306 -4.23309 )
beta : -4.92522 ( 4.88556 2.29881 )
Epeak [keV] : 25.7915 ( -6.6069 5.38399 )
Norm@50keV : 23.5883 ( -23.6944 15.2498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.29 using 59 PHA bins.
# Reduced chi-squared = 0.8417 for 55 degrees of freedom
# Null hypothesis probability = 7.921983e-01
Photon flux (15-150 keV) in 64 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] : 6.53075 (-1.40346 1.78279)
R^2/D10^2 : 0.187778 (-0.187778 0.332999)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
# Reduced chi-squared = 0.8211 for 57 degrees of freedom
# Null hypothesis probability = 8.303121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.618e-08 4.162e-08
25- 50 9.085e-08 5.659e-08
50-150 1.163e-08 9.792e-09
15-150 1.787e-07 1.064e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7121 (-11.4498 26.4842)
Norm : 0.621503 (-0.273372 0.52985)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.19 using 59 PHA bins.
# Reduced chi-squared = 0.8630 for 57 degrees of freedom
# Null hypothesis probability = 7.595172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.591e-08 3.919e-08
25- 50 8.110e-08 4.601e-08
50-150 3.793e-08 3.016e-08
15-150 1.949e-07 1.122e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.49832 (-6.5767 193.331)
R1^2/D10^2 : 0.190992 (-0.144823 -0.144823)
kT2 [keV] : 199.990 ( )
R2^2/D10^2 : 6.11680E-07 (-6.1168e-07 -6.1168e-07)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.80 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.78 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 55 degrees of freedom
# Reduced chi-squared = 0.8506 for 55 degrees of freedom
# Null hypothesis probability = 7.762740e-01
# Null hypothesis probability = 7.769276e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.603e-08 7.472e-02
25- 50 9.108e-08 6.294e-01
50-150 1.178e-08 1.346e+01
15-150 1.789e-07 1.513e+01
Plot creation:
Thu Jun 4 23:42:32 EDT 2015