batgrbproduct Analysis for Trigger=597320
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): Sun Apr 27 21:15:47 EDT 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger597320/GCN5_download_cron
======================================================================
Trigger: 00597320 Segment: 000
BAT Trigger Time: 420279672 [s; MET]
Trigger Stop: 420280056 [s; MET]
UTC: 2014-04-27T08:21:00.061600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.124661043613 Dec: -28.7191749633205 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.09
Flight Position: [ source = BAT ]
RA: 266.124661043613 Dec: -28.7191749633205 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.144924204023 Dec: -28.733845642282 [deg; J2000]
{ 17h 44m 34.8s , -28d 44' 01.8" }
+/- 2.31640108593819 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05353987920046 [arcmin] (formal 1-sigma fit error)
SNR: 9.16127386217842
Angular difference between Flight and Ground position is 1.382574 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
T50: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 384 second)
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.903623 0.589361 0.126017 -0.081512
0.120018 0.108272 0.089389 0.075669 [error]
Peak 1.903623 0.589361 0.126017 -0.081512
0.120018 0.108272 0.089389 0.075669 [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 5.16e-07 2.90e-07 1.03e-07 4.78e-08 9.34e-07 9.57e-07 erg/cm2
Error 6.61e-08 5.68e-08 4.33e-08 3.57e-08 1.35e-07 1.49e-07 erg/cm2
Peak flux Power-law 4.57e-02 1.46e-02 2.58e-03 5.31e-04 6.31e-02 6.33e-02 ph/cm2/s
Error 5.98e-03 2.71e-03 1.05e-03 3.75e-04 7.53e-03 7.56e-03 ph/cm2/s
Fluence Cutoff-PL 5.38e-07 2.64e-07 1.57e-08 3.78e-11 8.19e-07 8.19e-07 erg/cm2
Error 7.40e-08 8.46e-08 5.07e-08 1.55e-08 1.32e-07 1.30e-07 erg/cm2
Peak flux Cutoff-PL 4.70e-02 1.39e-02 4.50e-04 5.75e-07 6.14e-02 6.13e-02 ph/cm2/s
Error 6.55e-03 3.89e-03 1.29e-03 1.85e-04 7.43e-03 7.43e-03 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 0.00e+00 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 3.497 0.359 - - 1.57e-04 5.04e-05 62.750 57
CPL 1.019 0.000 9.5 0.0 1.29e-02 0.00e+00 59.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.497 0.359 - - 1.57e-04 5.04e-05 62.750 57
CPL 1.019 0.000 9.5 0.0 1.29e-02 0.00e+00 59.690 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 384.000 0.000 384.000
T90 384.000 0.000 384.000
T50 384.000 0.000 384.000
Peak 384.000 0.000 384.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.1449 -28.7338 0.0212 0.0 103.6 2.7850 9.2 TRIG_00597320
------------------------------------------
Foreground time interval of the image:
0.000 82.240 (delta_t = 82.240 [sec])
83.000 147.140 (delta_t = 64.140 [sec])
148.000 148.303 (delta_t = 0.303 [sec])
150.000 220.370 (delta_t = 70.370 [sec])
221.000 384.000 (delta_t = 163.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.240000
83.000000 147.140000
148.000000 148.302500
150.000000 220.370000
221.000000 384.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.49689 ( -0.340295 0.378076 )
Norm@50keV : 1.56535E-04 ( -4.71643e-05 5.3655e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.75 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.798560e-01
Photon flux (15-150 keV) in 380.1 sec: 6.31487E-02 ( -0.00752356 0.00752742 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.3443e-07 ( -1.3206e-07 1.38593e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.240000
83.000000 147.140000
148.000000 148.302500
150.000000 220.370000
221.000000 384.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01894 ( )
Epeak [keV] : 9.53824 ( )
Norm@50keV : 1.29055E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.431320e-01
Photon flux (15-150 keV) in 380.1 sec: 6.13516E-02 ( -0.0074047 0.0074603 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.18663e-07 ( -1.16482e-07 1.47323e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.240000
83.000000 147.140000
148.000000 148.302500
150.000000 220.370000
221.000000 384.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.05307 ( 1.70732 1.70732 )
beta : -4.26488 ( 4.12832 0.740895 )
Epeak [keV] : 16.9815 ( -3.9615 2.20839 )
Norm@50keV : 236.300 ( -236.611 3616.17 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 55 degrees of freedom
# Null hypothesis probability = 4.225067e-01
Photon flux (15-150 keV) in 380.1 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] : 4.21586 (-0.46732 0.539269)
R^2/D10^2 : 1.23789 (-0.574639 1.08568)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.48 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 57 degrees of freedom
# Null hypothesis probability = 3.512997e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.489e-07 1.121e-07
25- 50 2.297e-07 6.346e-08
50-150 3.803e-09 2.492e-09
15-150 7.824e-07 1.524e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5662 (-2.30451 3.21409)
Norm : 1.64629 (-0.526282 0.899525)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.80 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.743529e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.335e-07 1.048e-07
25- 50 2.762e-07 7.344e-08
50-150 2.756e-08 1.699e-08
15-150 8.374e-07 1.530e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89782 (-1.32281 0.636878)
R1^2/D10^2 : 1.74640 (-0.92006 4.40851)
kT2 [keV] : 14.8939 (-8.11929 -14.8939)
R2^2/D10^2 : 1.04594E-03 (-0.00104563 0.580493)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.37 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.873570e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.503e-07 1.782e-07
25- 50 2.512e-07 9.713e-08
50-150 1.117e-07 9.223e-08
15-150 9.132e-07 3.332e-07
Peak spectrum fit
Power-law model
Time interval is from 221.000 sec. to 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.49689 ( -0.340295 0.378076 )
Norm@50keV : 1.56535E-04 ( -4.71643e-05 5.3655e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.75 using 59 PHA bins.
# Reduced chi-squared = 1.101 for 57 degrees of freedom
# Null hypothesis probability = 2.798560e-01
Photon flux (15-150 keV) in 380.1 sec: 6.31487E-02 ( -0.00752356 0.00752742 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.3443e-07 ( -1.3206e-07 1.38593e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 221.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01894 ( )
Epeak [keV] : 9.53824 ( )
Norm@50keV : 1.29055E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.69 using 59 PHA bins.
# Reduced chi-squared = 1.066 for 56 degrees of freedom
# Null hypothesis probability = 3.431320e-01
Photon flux (15-150 keV) in 380.1 sec: 6.13516E-02 ( -0.0074047 0.0074603 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.18663e-07 ( -1.16482e-07 1.47323e-07 ) ergs/cm2
Band function
Time interval is from 221.000 sec. to 384.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.52543E-02 ( 1.70732 1.70732 )
beta : -10.0000 ( 9.99937 0.000676204 )
Epeak [keV] : 13.3916 ( -1.72087 8.92726 )
Norm@50keV : 7.66469E-02 ( -0.00901456 174.117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.65 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 55 degrees of freedom
# Null hypothesis probability = 3.103715e-01
Photon flux (15-150 keV) in 380.1 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] : 4.21586 (-0.46732 0.539269)
R^2/D10^2 : 1.23789 (-0.574639 1.08568)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.48 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 57 degrees of freedom
# Null hypothesis probability = 3.512997e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.489e-07 1.034e-07
25- 50 2.297e-07 6.534e-08
50-150 3.803e-09 2.564e-09
15-150 7.824e-07 1.695e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.5662 (-2.30451 3.21409)
Norm : 1.64629 (-0.526282 0.899525)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.80 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.743529e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.335e-07 1.045e-07
25- 50 2.762e-07 6.901e-08
50-150 2.756e-08 1.711e-08
15-150 8.374e-07 1.518e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.89782 (-1.32281 0.636878)
R1^2/D10^2 : 1.74640 (-0.92006 4.4123)
kT2 [keV] : 14.8939 (-13.1507 -14.8939)
R2^2/D10^2 : 1.04594E-03 (-0.00104563 0.580493)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.37 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.873570e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.503e-07 2.263e-07
25- 50 2.512e-07 1.026e-07
50-150 1.117e-07 8.604e-08
15-150 9.132e-07 3.676e-07
Plot creation:
Sun Apr 27 21:40:11 EDT 2014