batgrbproduct Analysis for Trigger=630047
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 Feb 8 20:22:29 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger630047/batgroup_hand_proc
======================================================================
Trigger: 00630047 Segment: 000
BAT Trigger Time: 444948328 [s; MET]
Trigger Stop: 444949240 [s; MET]
UTC: 2015-02-06T20:45:14.848060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.019456040675 Dec: -34.3177318998639 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.64
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.64
Flight Position: [ source = BAT ]
RA: 271.019456040675 Dec: -34.3177318998639 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 270.997131808966 Dec: -34.3414678830868 [deg; J2000]
{ 18h 03m 59.3s , -34d 20' 29.3" }
+/- 3.22998697958929 [arcmin] (estimated 90% radius based on SNR)
+/- 1.38298862890386 [arcmin] (formal 1-sigma fit error)
SNR: 5.69755736105836
Angular difference between Flight and Ground position is 1.803262 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 912 +/-
Measured from: 0
to: 912 [s; relative to TRIGTIME]
T50: 912 +/-
Measured from: 0
to: 912 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 912 second)
Measured from: 0
to: 912 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 912 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.701708 1.856908 0.718604 -0.030725
0.191015 0.157596 0.129742 0.109004 [error]
Peak 1.701708 1.856908 0.718604 -0.030725
0.191015 0.157596 0.129742 0.109004 [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 4.82e-07 6.40e-07 6.24e-07 1.09e-06 2.10e-06 2.83e-06 erg/cm2
Error 7.72e-08 7.15e-08 1.18e-07 4.07e-07 2.73e-07 5.36e-07 erg/cm2
Peak flux Power-law 1.72e-02 1.27e-02 6.17e-03 4.27e-03 3.81e-02 4.03e-02 ph/cm2/s
Error 2.82e-03 1.41e-03 1.12e-03 1.48e-03 4.28e-03 4.49e-03 ph/cm2/s
Fluence Cutoff-PL 4.35e-07 7.34e-07 5.45e-07 1.49e-07 1.83e-06 1.86e-06 erg/cm2
Error 8.87e-08 1.03e-07 1.61e-07 3.25e-07 3.08e-07 4.48e-07 erg/cm2
Peak flux Cutoff-PL 1.53e-02 1.44e-02 5.61e-03 8.10e-04 3.60e-02 3.62e-02 ph/cm2/s
Error 3.27e-03 2.00e-03 1.50e-03 1.44e-03 4.53e-03 4.69e-03 ph/cm2/s
Fluence Band 4.25e-07 7.40e-07 5.34e-07 5.20e-07 1.92e-06 2.23e-06 erg/cm2
Error 9.08e-08 -------- -------- -------- -------- 6.83e-07 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 2.036 0.208 - - 2.50e-04 3.44e-05 62.270 57
CPL 0.708 1.218 38.3 12.0 1.53e-03 5.19e-03 57.380 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 2.036 0.208 - - 2.50e-04 3.44e-05 62.270 57
CPL 0.708 1.218 38.3 12.0 1.53e-03 5.19e-03 57.380 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 912.000 0.000 912.000
T90 912.000 0.000 912.000
T50 912.000 0.000 912.000
Peak 912.000 0.000 912.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
270.9971 -34.3415 0.0338 6.6015 -36.1682 4.8275216 5.698 TRIG_00630047
Foreground time interval of the image:
0.000 912.000 (delta_t = 912.000 [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 912.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03635 ( -0.203727 0.213168 )
Norm@50keV : 2.49592E-04 ( -3.47132e-05 3.41042e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.27 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 57 degrees of freedom
# Null hypothesis probability = 2.942490e-01
Photon flux (15-150 keV) in 912 sec: 3.80782E-02 ( -0.00428184 0.00428669 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10382e-06 ( -2.70113e-07 2.76192e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 912.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.708045 ( -1.38227 1.0531 )
Epeak [keV] : 38.2942 ( -12.0352 11.8972 )
Norm@50keV : 1.52976E-03 ( -0.00153025 0.00885405 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.38 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 56 degrees of freedom
# Null hypothesis probability = 4.238477e-01
Photon flux (15-150 keV) in 912 sec: 3.60478E-02 ( -0.0045108 0.0045445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83246e-06 ( -2.86249e-07 3.2956e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 912.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.145971 ( -1.22763 0.409 )
beta : -2.64385 ( 2.7684 0.696768 )
Epeak [keV] : 34.1310 ( -13.8373 10.5665 )
Norm@50keV : 5.93625E-03 ( -0.00568147 14.2889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.61 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.147499e-01
Photon flux (15-150 keV) in 912 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92144e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.63313 (-1.11665 1.2735)
R^2/D10^2 : 2.04303E-02 (-0.00790293 0.0127947)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.90 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.471287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.473e-07 7.250e-08
25- 50 8.182e-07 1.199e-07
50-150 3.829e-07 1.157e-07
15-150 1.548e-06 2.362e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.4121 (-15.9534 26.1782)
Norm : 0.202418 (-0.0365581 0.0439996)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.329655e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.619e-07 6.772e-08
25- 50 6.972e-07 9.612e-08
50-150 7.756e-07 2.340e-07
15-150 1.935e-06 2.896e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53205 (-3.24625 -6.5592)
R1^2/D10^2 : 6.19932E-02 (-0.0420152 0.0721048)
kT2 [keV] : 16.9708 (-13.915 -17.2287)
R2^2/D10^2 : 1.29997E-03 (-0.00119152 0.0117062)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.11 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.965935e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.282e-07 2.347e-07
25- 50 7.353e-07 3.911e-07
50-150 6.866e-07 3.870e-07
15-150 1.850e-06 9.585e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 912.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03635 ( -0.203727 0.213168 )
Norm@50keV : 2.49592E-04 ( -3.47132e-05 3.41042e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.27 using 59 PHA bins.
# Reduced chi-squared = 1.092 for 57 degrees of freedom
# Null hypothesis probability = 2.942490e-01
Photon flux (15-150 keV) in 912 sec: 3.80782E-02 ( -0.00428184 0.00428669 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10382e-06 ( -2.70113e-07 2.76192e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 912.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.708045 ( -1.38227 1.0531 )
Epeak [keV] : 38.2942 ( -12.0352 11.8972 )
Norm@50keV : 1.52976E-03 ( -0.00153025 0.00885405 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.38 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 56 degrees of freedom
# Null hypothesis probability = 4.238477e-01
Photon flux (15-150 keV) in 912 sec: 3.60478E-02 ( -0.0045108 0.0045445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83246e-06 ( -2.86249e-07 3.2956e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 912.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.145971 ( -1.22763 0.409 )
beta : -2.64385 ( 2.7684 0.696768 )
Epeak [keV] : 34.1310 ( -13.8373 10.5665 )
Norm@50keV : 5.93625E-03 ( -0.00568147 14.2884 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.61 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.147499e-01
Photon flux (15-150 keV) in 912 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.92144e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.63313 (-1.11665 1.2735)
R^2/D10^2 : 2.04303E-02 (-0.00790293 0.0127947)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.90 using 59 PHA bins.
# Reduced chi-squared = 1.121 for 57 degrees of freedom
# Null hypothesis probability = 2.471287e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.473e-07 7.063e-08
25- 50 8.182e-07 1.063e-07
50-150 3.829e-07 1.206e-07
15-150 1.548e-06 2.326e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.4121 (-15.9534 26.1782)
Norm : 0.202418 (-0.0365581 0.0439996)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.329655e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.619e-07 7.018e-08
25- 50 6.972e-07 8.705e-08
50-150 7.756e-07 2.299e-07
15-150 1.935e-06 2.918e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53205 (-3.24625 -6.5592)
R1^2/D10^2 : 6.19932E-02 (-0.0420152 0.0722996)
kT2 [keV] : 16.9708 (-13.915 -17.2287)
R2^2/D10^2 : 1.29997E-03 (-0.00119152 0.0117062)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.11 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 55 degrees of freedom
# Null hypothesis probability = 3.965935e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.282e-07 2.419e-07
25- 50 7.353e-07 3.785e-07
50-150 6.866e-07 3.945e-07
15-150 1.850e-06 9.571e-07
Plot creation:
Sun Feb 8 20:30:50 EST 2015