batgrbproduct Analysis for Trigger=557782
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 Jun 10 15:47:29 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger557782/batgroup_hand_proc
======================================================================
Trigger: 00557782 Segment: 000
BAT Trigger Time: 392439918.296 [s; MET]
Trigger Stop: 392439929.796 [s; MET]
UTC: 2013-06-09T03:05:07.643500 [includes UTCF correction]
Where From?: Command line
BAT
RA: 152.675973444186 Dec: 24.1013777128368 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.68
Image Trigger?: NO
Rate S/N Ratio: 16.431676725155 [ if not an image trigger ]
Image S/N Ratio: 9.68
Flight Position: [ source = EXTERNAL ]
RA: 152.6791 Dec: 24.126 [deg; J2000]
Partial Coding Fraction: 0.875 [ including projection effects ]
Angular difference between Flight and Ground position is 0.000000 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 6.81599992513657 +/- 0.70958012422145
Measured from: 0.675999999046326
to: 7.49199992418289 [s; relative to TRIGTIME]
T50: 2.87999993562698 +/- 0.374593125141438
Measured from: 1.82800000905991
to: 4.70799994468689 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.52399998903275
to: 2.52399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.263999998569489
to: 8.283999979496 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.368843 0.385755 0.227452 0.012149
0.019824 0.020005 0.017239 0.014229 [error]
Peak 0.089596 0.082073 0.037299 -0.008011
0.007492 0.007693 0.006316 0.005044 [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 1.16e-07 1.60e-07 1.64e-07 3.07e-07 5.38e-07 7.47e-07 erg/cm2
Error 1.06e-08 9.67e-09 1.66e-08 6.25e-08 3.79e-08 7.93e-08 erg/cm2
Peak flux Power-law 8.31e-01 5.95e-01 2.82e-01 1.88e-01 1.80e+00 1.90e+00 ph/cm2/s
Error 1.16e-01 6.16e-02 5.07e-02 6.27e-02 1.84e-01 1.96e-01 ph/cm2/s
Fluence Cutoff-PL 1.06e-07 1.72e-07 1.63e-07 1.14e-07 5.07e-07 5.55e-07 erg/cm2
Error 1.23e-08 1.25e-08 1.84e-08 7.86e-08 4.22e-08 9.00e-08 erg/cm2
Peak flux Cutoff-PL 7.71e-01 6.59e-01 2.75e-01 6.25e-02 1.75e+00 1.77e+00 ph/cm2/s
Error 1.30e-01 8.28e-02 5.90e-02 8.00e-02 1.87e-01 1.97e-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 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 1.965 0.116 - - 7.28e-03 5.31e-04 49.880 57
CPL 1.301 0.485 46.8 12.3 1.68e-02 1.11e-02 43.500 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.079 0.193 - - 1.15e-02 1.58e-03 57.960 57
CPL 1.212 0.820 37.1 0.0 3.73e-02 0.00e+00 53.870 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: 4.352000 sec.
T50 in the 50-300 keV band: 2.752000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.020 0.264 8.284
T90 6.816 0.676 7.492
T50 2.880 1.828 4.708
Peak 1.000 1.524 2.524
Image
Pre-slew 14.0-100.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
152.6791 24.1260 0.0078 18.7388 -127.2696 1.0537229 24.694 TRIG_00557782
Foreground time interval of the image:
0.000 11.500 (delta_t = 11.500 [sec])
Background time interval of the image:
-199.000 -9.000 (delta_t = 190.000 [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 0.264 sec. to 8.284 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96478 ( -0.114286 0.117709 )
Norm@50keV : 7.28156E-03 ( -0.00053433 0.000527622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.88 using 59 PHA bins.
# Reduced chi-squared = 0.8752 for 57 degrees of freedom
# Null hypothesis probability = 7.367156e-01
Photon flux (15-150 keV) in 8.02 sec: 1.07492 ( -0.0659086 0.0659661 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37688e-07 ( -3.77333e-08 3.81477e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.264 sec. to 8.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30077 ( -0.509413 0.459607 )
Epeak [keV] : 46.7889 ( -9.85063 14.7222 )
Norm@50keV : 1.68349E-02 ( -0.00726678 0.0148418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.50 using 59 PHA bins.
# Reduced chi-squared = 0.7768 for 56 degrees of freedom
# Null hypothesis probability = 8.884603e-01
Photon flux (15-150 keV) in 8.02 sec: 1.03945 ( -0.069769 0.06987 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.06773e-07 ( -4.16021e-08 4.28084e-08 ) ergs/cm2
Band function
Time interval is from 0.264 sec. to 8.284 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30080 ( -0.346357 0.674039 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 46.7801 ( -9.84217 14.7363 )
Norm@50keV : 1.68322E-02 ( -0.00726704 0.0148518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.50 using 59 PHA bins.
# Reduced chi-squared = 0.7909 for 55 degrees of freedom
# Null hypothesis probability = 8.684498e-01
Photon flux (15-150 keV) in 8.02 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] : 11.2636 (-0.846732 0.900548)
R^2/D10^2 : 0.312579 (-0.0785 0.106923)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.53 using 59 PHA bins.
# Reduced chi-squared = 1.694 for 57 degrees of freedom
# Null hypothesis probability = 8.382763e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.674e-08 7.234e-09
25- 50 1.945e-07 1.243e-08
50-150 1.419e-07 2.181e-08
15-150 4.031e-07 3.088e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 73.6771 (-13.1366 17.8865)
Norm : 5.14823 (-0.490242 0.556107)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.61 using 59 PHA bins.
# Reduced chi-squared = 0.7650 for 57 degrees of freedom
# Null hypothesis probability = 9.040810e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.065e-07 9.504e-09
25- 50 1.717e-07 1.111e-08
50-150 2.289e-07 3.400e-08
15-150 5.071e-07 4.259e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.74809 (-0.792606 0.921311)
R1^2/D10^2 : 5.41101 (-2.77232 6.61939)
kT2 [keV] : 16.5524 (-1.94675 2.53093)
R2^2/D10^2 : 5.84062E-02 (-0.0261082 0.0396287)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.25 using 59 PHA bins.
# Reduced chi-squared = 0.6774 for 55 degrees of freedom
# Null hypothesis probability = 9.680534e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.117e-07 3.725e-08
25- 50 1.630e-07 3.581e-08
50-150 2.225e-07 5.093e-08
15-150 4.972e-07 1.127e-07
Peak spectrum fit
Power-law model
Time interval is from 1.524 sec. to 2.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07925 ( -0.186652 0.198384 )
Norm@50keV : 1.15422E-02 ( -0.00159186 0.0015595 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.395296e-01
Photon flux (15-150 keV) in 1 sec: 1.79751 ( -0.184032 0.184037 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07034e-07 ( -1.33233e-08 1.363e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.524 sec. to 2.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21166 ( -0.893365 0.745869 )
Epeak [keV] : 37.1046 ( )
Norm@50keV : 3.73031E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9620 for 56 degrees of freedom
# Null hypothesis probability = 5.559318e-01
Photon flux (15-150 keV) in 1 sec: 1.75303 ( -0.1865 0.18692 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.93742e-08 ( -1.37548e-08 1.46948e-08 ) ergs/cm2
Band function
Time interval is from 1.524 sec. to 2.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21175 ( -0.812905 0.815647 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 37.1001 ( -25.916 13.7026 )
Norm@50keV : 3.72927E-02 ( -0.0119336 0.0879183 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178626e-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] : 9.66445 (-1.19856 1.32807)
R^2/D10^2 : 0.956836 (-0.372861 0.633344)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.83 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.928217e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.797e-08 3.130e-09
25- 50 4.255e-08 5.600e-09
50-150 2.010e-08 5.735e-09
15-150 8.062e-08 1.090e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.4006 (-14.555 22.0513)
Norm : 9.68105 (-1.55606 1.81566)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.94 using 59 PHA bins.
# Reduced chi-squared = 0.9464 for 57 degrees of freedom
# Null hypothesis probability = 5.904984e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.415e-08 3.535e-09
25- 50 3.625e-08 4.310e-09
50-150 3.973e-08 1.226e-08
15-150 1.001e-07 1.431e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.71095 (-1.21254 1.48868)
R1^2/D10^2 : 9.91853 (-6.44562 25.3814)
kT2 [keV] : 15.2345 (-3.03529 4.79039)
R2^2/D10^2 : 0.123798 (-0.0863183 0.147167)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.51 using 59 PHA bins.
# Reduced chi-squared = 0.9365 for 55 degrees of freedom
# Null hypothesis probability = 6.089083e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.489e-08 1.277e-08
25- 50 3.480e-08 1.566e-08
50-150 3.877e-08 2.211e-08
15-150 9.846e-08 4.450e-08
Plot creation:
Mon Jun 10 16:08:58 EDT 2013