batgrbproduct Analysis for Trigger=635792
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 Mar 23 01:21:48 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger635792/GCN5_download_cron
======================================================================
Trigger: 00635792 Segment: 000
BAT Trigger Time: 448706648 [s; MET]
Trigger Stop: 448706712 [s; MET]
UTC: 2015-03-22T08:43:54.657180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.9676941762152 Dec: 21.7341972098307 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.29
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 20.29
Flight Position: [ source = BAT ]
RA: 83.9676941762152 Dec: 21.7341972098307 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.974335495143 Dec: 21.7403126188237 [deg; J2000]
{ 05h 35m 53.8s , +21d 44' 25.1" }
+/- 1.13250510030398 [arcmin] (estimated 90% radius based on SNR)
+/- 0.460170905171917 [arcmin] (formal 1-sigma fit error)
SNR: 25.4635025874987
Angular difference between Flight and Ground position is 0.521191 arcmin
Partial Coding Fraction: 0.6953125 [ 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 1.044249 1.020537 0.480379 0.050019
0.053834 0.055194 0.046312 0.038990 [error]
Peak 1.044249 1.020537 0.480379 0.050019
0.053834 0.055194 0.046312 0.038990 [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 3.52e-07 4.41e-07 4.02e-07 6.39e-07 1.41e-06 1.83e-06 erg/cm2
Error 3.44e-08 2.84e-08 4.64e-08 1.48e-07 1.04e-07 1.96e-07 erg/cm2
Peak flux Power-law 1.80e-01 1.25e-01 5.69e-02 3.61e-02 3.79e-01 3.97e-01 ph/cm2/s
Error 1.80e-02 8.01e-03 6.32e-03 7.80e-03 2.50e-02 2.56e-02 ph/cm2/s
Fluence Cutoff-PL 3.46e-07 4.49e-07 4.00e-07 4.75e-07 1.39e-06 1.67e-06 erg/cm2
Error 2.92e-08 2.75e-08 4.83e-08 -------- 1.21e-07 3.25e-07 erg/cm2
Peak flux Cutoff-PL 1.76e-01 1.27e-01 5.68e-02 2.86e-02 3.75e-01 3.88e-01 ph/cm2/s
Error 1.55e-02 9.82e-03 6.51e-03 1.39e-02 2.67e-02 3.23e-02 ph/cm2/s
Fluence Band 3.37e-07 4.53e-07 3.92e-07 5.70e-07 1.39e-06 1.76e-06 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 2.133 0.132 - - 2.37e-03 1.95e-04 58.520 57
CPL 1.954 0.270 11.5 -0.1 2.98e-03 0.00e+00 58.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.133 0.132 - - 2.37e-03 1.95e-04 58.520 57
CPL 1.954 0.270 11.5 -0.1 2.98e-03 0.00e+00 58.190 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
83.9743 +21.7403 0.0076 32.9 -28.7 2.6661 25.5 TRIG_00635792
------------------------------------------
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: 2.13297 ( -0.129237 0.134036 )
Norm@50keV : 2.36826E-03 ( -0.00019627 0.000192942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.52 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.193101e-01
Photon flux (15-150 keV) in 64 sec: 0.378767 ( -0.0249796 0.0250372 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41307e-06 ( -1.03874e-07 1.04986e-07 ) 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: 1.95364 ( -0.516397 0.0245982 )
Epeak [keV] : 11.4537 ( -9.17817 -9.33313 )
Norm@50keV : 2.98220E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 56 degrees of freedom
# Null hypothesis probability = 3.947179e-01
Photon flux (15-150 keV) in 64 sec: 0.375430 ( -0.026674 0.026672 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39092e-06 ( -1.22426e-07 1.20499e-07 ) 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 : -1.96349 ( 1.90458 0.105408 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 9.32432 ( -5.12737 27.7381 )
Norm@50keV : 2.94570E-03 ( -0.00045807 0.00276788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.588039e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38805e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.38446 ( )
R^2/D10^2 : 0.211362 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 117.44 using 59 PHA bins.
# Reduced chi-squared = 2.0603 for 57 degrees of freedom
# Null hypothesis probability = 4.413945e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.367e-07 2.835e-08
25- 50 5.363e-07 4.086e-08
50-150 2.322e-07 4.566e-08
15-150 1.005e-06 7.840e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.7462 (-10.5074 13.8933)
Norm : 1.97468 (-0.23147 0.249884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.16 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.975974e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.156e-07 2.986e-08
25- 50 4.746e-07 3.411e-08
50-150 5.229e-07 9.120e-08
15-150 1.313e-06 1.088e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85353 (-0.930067 0.950666)
R1^2/D10^2 : 1.04992 (-0.452873 1.01324)
kT2 [keV] : 21.2043 (-4.30456 6.83018)
R2^2/D10^2 : 6.09836E-03 (-0.00397492 0.00922367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.465621e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.280e-07 7.562e-08
25- 50 4.494e-07 8.160e-08
50-150 5.956e-07 2.763e-07
15-150 1.373e-06 3.536e-07
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: 2.13297 ( -0.129237 0.134036 )
Norm@50keV : 2.36826E-03 ( -0.00019627 0.000192942 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.52 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.193101e-01
Photon flux (15-150 keV) in 64 sec: 0.378767 ( -0.0249796 0.0250372 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41307e-06 ( -1.03874e-07 1.04986e-07 ) 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: 1.95364 ( -0.516397 0.0245982 )
Epeak [keV] : 11.4537 ( -9.17817 -9.33313 )
Norm@50keV : 2.98220E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.039 for 56 degrees of freedom
# Null hypothesis probability = 3.947179e-01
Photon flux (15-150 keV) in 64 sec: 0.375430 ( -0.026674 0.026672 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39092e-06 ( -1.22426e-07 1.20499e-07 ) 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 : -1.96349 ( 1.90458 0.105408 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 9.32432 ( -5.12737 27.7381 )
Norm@50keV : 2.94570E-03 ( -0.00045807 0.00276788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.588039e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38805e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.38446 ( )
R^2/D10^2 : 0.211362 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 117.44 using 59 PHA bins.
# Reduced chi-squared = 2.0603 for 57 degrees of freedom
# Null hypothesis probability = 4.413945e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.367e-07 2.758e-08
25- 50 5.363e-07 3.955e-08
50-150 2.322e-07 4.381e-08
15-150 1.005e-06 7.968e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.7462 (-10.5074 13.8933)
Norm : 1.97468 (-0.23147 0.249884)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.16 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.975974e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.156e-07 2.838e-08
25- 50 4.746e-07 3.226e-08
50-150 5.229e-07 8.432e-08
15-150 1.313e-06 9.920e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85353 (-0.930067 0.950666)
R1^2/D10^2 : 1.04992 (-0.452873 1.01324)
kT2 [keV] : 21.2043 (-4.30456 6.83018)
R2^2/D10^2 : 6.09836E-03 (-0.00397492 0.00922367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.55 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 55 degrees of freedom
# Null hypothesis probability = 3.465621e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.280e-07 6.950e-08
25- 50 4.494e-07 8.448e-08
50-150 5.956e-07 2.605e-07
15-150 1.373e-06 3.989e-07
Plot creation:
Mon Mar 23 01:24:58 EDT 2015