batgrbproduct Analysis for Trigger=525554
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): Tue Jul 3 07:16:12 EDT 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger525554/batgroup_hand_proc
======================================================================
Trigger: 00525554 Segment: 000
BAT Trigger Time: 362891856 [s; MET]
Trigger Stop: 362891920 [s; MET]
UTC: 2012-07-02T03:17:26.619920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 144.681475994238 Dec: -15.9916006691616 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.11
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.11
Flight Position: [ source = BAT ]
RA: 144.681475994238 Dec: -15.9916006691616 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 144.645429119595 Dec: -15.976122358326 [deg; J2000]
{ 09h 38m 34.9s , -15d 58' 34.0" }
+/- 4.03416926236405 [arcmin] (estimated 90% radius based on SNR)
+/- 2.26481126995388 [arcmin] (formal 1-sigma fit error)
SNR: 4.14720360228972
Angular difference between Flight and Ground position is 2.277178 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 0.103564 0.199981 -0.009173 -0.029572
0.042488 0.041903 0.036602 0.031582 [error]
Peak 0.103564 0.199981 -0.009173 -0.029572
0.042488 0.041903 0.036602 0.031582 [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 3.75e-08 4.70e-08 4.28e-08 6.79e-08 1.51e-07 1.96e-07 erg/cm2
Error 1.63e-08 1.81e-08 2.77e-08 9.45e-08 6.83e-08 1.26e-07 erg/cm2
Peak flux Power-law 1.92e-02 1.33e-02 6.05e-03 3.84e-03 4.04e-02 4.24e-02 ph/cm2/s
Error 8.27e-03 5.01e-03 3.81e-03 4.99e-03 1.46e-02 1.58e-02 ph/cm2/s
Fluence Cutoff-PL 3.01e-08 7.60e-08 1.28e-08 1.97e-11 1.19e-07 0.00e+00 erg/cm2
Error 1.96e-08 2.93e-08 2.38e-08 4.03e-09 4.51e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.45e-02 2.17e-02 2.15e-03 1.81e-06 3.84e-02 3.84e-02 ph/cm2/s
Error 1.00e-02 8.07e-03 3.60e-03 3.22e-04 1.38e-02 1.38e-02 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 2.140 0.646 - - 2.51e-04 1.25e-04 45.670 57
CPL -5.219 0.000 33.0 7.5 1.37e+01 0.00e+00 40.120 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.140 0.646 - - 2.51e-04 1.25e-04 45.670 57
CPL -5.219 0.000 33.0 7.5 1.37e+01 0.00e+00 40.120 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 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
144.6454 -15.9761 0.0461 12.2962 140.3911 0.3385059 4.147 TRIG_00525554
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: 2.13959 ( -0.577352 0.715194 )
Norm@50keV : 2.51475E-04 ( -0.000124111 0.000126154 )
------------------------------------------------------------
# Chi-Squared = 45.67 using 59 PHA bins.
# Reduced chi-squared = 0.8013 for 57 degrees of freedom
# Null hypothesis probability = 8.592233e-01
Photon flux (15-150 keV) in 64 sec: 4.03686E-02 ( -0.0145283 0.0146274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50519e-07 ( -6.4311e-08 7.2233e-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: -5.21894 ( )
Epeak [keV] : 33.0413 ( -7.17549 7.75204 )
Norm@50keV : 13.7256 ( )
------------------------------------------------------------
# Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7164 for 56 degrees of freedom
# Null hypothesis probability = 9.459714e-01
Photon flux (15-150 keV) in 64 sec: 3.83786E-02 ( -0.0137009 0.013818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18922e-07 ( -4.15091e-08 4.8688e-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 : 4.13949 ( -12.9574 -4.06721 )
beta : -9.37165 ( 9.99997 19.9965 )
Epeak [keV] : 33.1981 ( -6.99266 8.8134 )
Norm@50keV : 2.78447 ( -2.77682 2.64485 )
------------------------------------------------------------
# Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7295 for 55 degrees of freedom
# Null hypothesis probability = 9.340333e-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] : 8.47849 (-2.08021 2.76374)
R^2/D10^2 : 4.10762E-02 (-0.0410828 0.0810557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 40.74 using 59 PHA bins.
# Reduced chi-squared = 0.7147 for 57 degrees of freedom
# Null hypothesis probability = 9.488436e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.556e-08 2.106e-08
25- 50 6.867e-08 4.134e-08
50-150 2.175e-08 1.681e-08
15-150 1.260e-07 7.853e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.1414 (-22.182 81.8739)
Norm : 0.263167 (-0.118483 0.213805)
------------------------------------------------------------
# Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7687 for 57 degrees of freedom
# Null hypothesis probability = 8.999493e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.933e-08 2.436e-08
25- 50 5.290e-08 3.245e-08
50-150 4.329e-08 3.549e-08
15-150 1.355e-07 9.283e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00049E-04 ( )
R1^2/D10^2 : 5.51391E-04 (-0.000551391 -0.000551391)
kT2 [keV] : 8.47845 (-2.08051 2.76344)
R2^2/D10^2 : 4.10773E-02 (-0.0410773 0.0810615)
------------------------------------------------------------
# Chi-Squared = 40.88 using 59 PHA bins.
# Chi-Squared = 40.74 using 59 PHA bins.
# Reduced chi-squared = 0.7434 for 55 degrees of freedom
# Reduced chi-squared = 0.7407 for 55 degrees of freedom
# Null hypothesis probability = 9.217580e-01
# Null hypothesis probability = 9.241782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.296e-08 1.388e-04
25- 50 7.030e-08 1.125e-03
50-150 2.707e-08 3.199e-02
15-150 1.303e-07 3.392e-02
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: 2.13959 ( -0.577352 0.715194 )
Norm@50keV : 2.51475E-04 ( -0.000124111 0.000126154 )
------------------------------------------------------------
# Chi-Squared = 45.67 using 59 PHA bins.
# Reduced chi-squared = 0.8013 for 57 degrees of freedom
# Null hypothesis probability = 8.592233e-01
Photon flux (15-150 keV) in 64 sec: 4.03686E-02 ( -0.0145283 0.0146274 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.50519e-07 ( -6.4311e-08 7.2233e-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: -5.21894 ( )
Epeak [keV] : 33.0413 ( -7.17549 7.75204 )
Norm@50keV : 13.7256 ( )
------------------------------------------------------------
# Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7164 for 56 degrees of freedom
# Null hypothesis probability = 9.459714e-01
Photon flux (15-150 keV) in 64 sec: 3.83786E-02 ( -0.0137009 0.013818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18922e-07 ( -4.15091e-08 4.8688e-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 : 4.13949 ( -12.6138 -4.06721 )
beta : -9.37165 ( 9.99997 19.9965 )
Epeak [keV] : 33.1981 ( -6.99262 8.80876 )
Norm@50keV : 2.78447 ( -2.77682 2.64485 )
------------------------------------------------------------
# Chi-Squared = 40.12 using 59 PHA bins.
# Reduced chi-squared = 0.7295 for 55 degrees of freedom
# Null hypothesis probability = 9.340333e-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] : 8.47849 (-2.08021 2.76374)
R^2/D10^2 : 4.10762E-02 (-0.0410828 0.0810557)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 40.74 using 59 PHA bins.
# Reduced chi-squared = 0.7147 for 57 degrees of freedom
# Null hypothesis probability = 9.488436e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.556e-08 2.152e-08
25- 50 6.867e-08 4.163e-08
50-150 2.175e-08 1.750e-08
15-150 1.260e-07 8.227e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 42.1414 (-22.182 81.8739)
Norm : 0.263167 (-0.118483 0.213805)
------------------------------------------------------------
# Chi-Squared = 43.82 using 59 PHA bins.
# Reduced chi-squared = 0.7687 for 57 degrees of freedom
# Null hypothesis probability = 8.999493e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.933e-08 2.442e-08
25- 50 5.290e-08 3.206e-08
50-150 4.329e-08 3.626e-08
15-150 1.355e-07 9.040e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00049E-04 ( )
R1^2/D10^2 : 5.51391E-04 (-0.000551391 -0.000551391)
kT2 [keV] : 8.47845 (-2.08051 2.76344)
R2^2/D10^2 : 4.10773E-02 (-0.0410773 0.0810615)
------------------------------------------------------------
# Chi-Squared = 40.88 using 59 PHA bins.
# Chi-Squared = 40.74 using 59 PHA bins.
# Reduced chi-squared = 0.7434 for 55 degrees of freedom
# Reduced chi-squared = 0.7407 for 55 degrees of freedom
# Null hypothesis probability = 9.217580e-01
# Null hypothesis probability = 9.241782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.296e-08 1.343e-04
25- 50 7.030e-08 1.272e-03
50-150 2.707e-08 2.939e-02
15-150 1.303e-07 3.100e-02
Plot creation:
Tue Jul 3 07:30:14 EDT 2012