batgrbproduct Analysis for Trigger=630019
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 Feb 10 11:33:13 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger630019/batgroup_hand_proc
======================================================================
Trigger: 00630019 Segment: 000
BAT Trigger Time: 444925816 [s; MET]
Trigger Stop: 444925880 [s; MET]
UTC: 2015-02-06T14:30:02.849200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 10.0880618864819 Dec: -63.1818740676982 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.92
Flight Position: [ source = BAT ]
RA: 10.0880618864819 Dec: -63.1818740676982 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 10.0708661913043 Dec: -63.1803951889171 [deg; J2000]
{ 00h 40m 17.0s , -63d 10' 49.4" }
+/- 0.793781904346877 [arcmin] (estimated 90% radius based on SNR)
+/- 0.141580027505718 [arcmin] (formal 1-sigma fit error)
SNR: 42.3060412294358
Angular difference between Flight and Ground position is 0.473874 arcmin
Partial Coding Fraction: 0.484375 [ including projection effects ]
Duration
T90: 76.5919999480247 +/- 12.5620842353207
Measured from: 38.0519999861717
to: 114.643999934196 [s; relative to TRIGTIME]
T50: 18.1399999260902 +/- 0.483735484119833
Measured from: 81.188000023365
to: 99.3279999494553 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 98.972000002861
to: 99.972000002861 [s; relative to TRIGTIME]
Total Fluence
Measured from: -22.2519999742508
to: 389.648000001907 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.096592 7.471370 6.726898 1.771601
0.166105 0.163937 0.144209 0.125566 [error]
Peak 0.240429 0.428049 0.418580 0.114477
0.012452 0.014764 0.015058 0.011115 [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 1.74e-06 3.39e-06 5.11e-06 1.67e-05 1.43e-05 2.69e-05 erg/cm2
Error 9.37e-08 1.06e-07 1.52e-07 1.16e-06 3.81e-07 1.23e-06 erg/cm2
Peak flux Power-law 2.66e+00 3.20e+00 2.79e+00 4.15e+00 1.01e+01 1.28e+01 ph/cm2/s
Error 2.03e-01 1.48e-01 1.23e-01 3.91e-01 4.04e-01 5.19e-01 ph/cm2/s
Fluence Cutoff-PL 1.62e-06 3.43e-06 5.24e-06 1.19e-05 1.41e-05 2.22e-05 erg/cm2
Error 1.24e-07 1.13e-07 1.79e-07 2.86e-06 4.17e-07 2.86e-06 erg/cm2
Peak flux Cutoff-PL 2.46e+00 3.26e+00 2.89e+00 3.02e+00 9.97e+00 1.16e+01 ph/cm2/s
Error 2.58e-01 1.60e-01 1.52e-01 8.17e-01 4.21e-01 9.25e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- 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 1.407 0.048 - - 3.61e-03 9.27e-05 50.040 57
CPL 1.137 0.200 181.6 175.8 4.76e-03 9.56e-04 44.430 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 1.200 0.068 - - 8.61e-02 3.32e-03 38.050 57
CPL 0.881 0.278 197.3 353.5 1.20e-01 3.50e-02 33.950 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: 34.048000 sec.
T50 in the 50-300 keV band: 15.808000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 411.900 -22.252 389.648
T90 76.592 38.052 114.644
T50 18.140 81.188 99.328
Peak 1.000 98.972 99.972
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
10.0709 -63.1804 0.0046 34.9509 -46.4961 21.6104304 42.306 TRIG_00630019
Foreground time interval of the image:
-13.699 389.648 (delta_t = 403.347 [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 -22.252 sec. to 389.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40727 ( -0.048153 0.048035 )
Norm@50keV : 3.61011E-03 ( -9.27596e-05 9.27393e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.04 using 59 PHA bins.
# Reduced chi-squared = 0.8779 for 57 degrees of freedom
# Null hypothesis probability = 7.315489e-01
Photon flux (15-150 keV) in 411.9 sec: 0.440376 ( -0.0127094 0.012752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43472e-05 ( -3.8131e-07 3.81657e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -22.252 sec. to 389.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13726 ( -0.20478 0.195676 )
Epeak [keV] : 181.629 ( -54.1198 297.43 )
Norm@50keV : 4.75524E-03 ( -0.000841379 0.0010714 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.43 using 59 PHA bins.
# Reduced chi-squared = 0.7934 for 56 degrees of freedom
# Null hypothesis probability = 8.675791e-01
Photon flux (15-150 keV) in 411.9 sec: 0.431660 ( -0.014017 0.014076 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41288e-05 ( -4.17625e-07 4.15401e-07 ) ergs/cm2
Band function
Time interval is from -22.252 sec. to 389.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11871 ( -0.206892 0.527779 )
beta : -1.70735 ( 1.6865 0.248423 )
Epeak [keV] : 171.093 ( -104.966 267.087 )
Norm@50keV : 4.85620E-03 ( -0.000870167 0.00561777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.24 using 59 PHA bins.
# Reduced chi-squared = 0.8043 for 55 degrees of freedom
# Null hypothesis probability = 8.501932e-01
Photon flux (15-150 keV) in 411.9 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] : 18.2473 ( )
R^2/D10^2 : 2.52876E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 304.56 using 59 PHA bins.
# Reduced chi-squared = 5.3431 for 57 degrees of freedom
# Null hypothesis probability = 1.642823e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.913e-07 4.057e-08
25- 50 3.230e-06 1.170e-07
50-150 7.833e-06 3.130e-07
15-150 1.175e-05 3.522e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.84960 (-0.047525 0.0475036)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.19 using 59 PHA bins.
# Reduced chi-squared = 1.460 for 57 degrees of freedom
# Null hypothesis probability = 1.339290e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.898e-06 5.705e-08
25- 50 3.650e-06 1.024e-07
50-150 8.006e-06 2.327e-07
15-150 1.355e-05 3.892e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.40762 (-0.869096 0.985299)
R1^2/D10^2 : 0.323446 (-0.10818 0.179253)
kT2 [keV] : 27.6156 (-2.35659 3.1789)
R2^2/D10^2 : 5.08291E-03 (-0.00164794 0.00196919)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9781 for 55 degrees of freedom
# Null hypothesis probability = 5.207546e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.503e-06 1.563e-07
25- 50 3.454e-06 1.874e-07
50-150 9.034e-06 5.581e-07
15-150 1.399e-05 6.632e-07
Peak spectrum fit
Power-law model
Time interval is from 98.972 sec. to 99.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20036 ( -0.0676543 0.0675301 )
Norm@50keV : 8.61228E-02 ( -0.00331797 0.00331779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.05 using 59 PHA bins.
# Reduced chi-squared = 0.6676 for 57 degrees of freedom
# Null hypothesis probability = 9.748008e-01
Photon flux (15-150 keV) in 1 sec: 10.1096 ( -0.404236 0.404681 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.73662e-07 ( -3.69749e-08 3.70562e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 98.972 sec. to 99.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.881260 ( -0.287078 0.269793 )
Epeak [keV] : 197.316 ( -67.5691 639.378 )
Norm@50keV : 0.120377 ( -0.0290541 0.0409525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.95 using 59 PHA bins.
# Reduced chi-squared = 0.6062 for 56 degrees of freedom
# Null hypothesis probability = 9.913335e-01
Photon flux (15-150 keV) in 1 sec: 9.96605 ( -0.42063 0.42115 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.6096e-07 ( -3.924e-08 3.9032e-08 ) ergs/cm2
Band function
Time interval is from 98.972 sec. to 99.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.627141 ( -0.561536 1.3589 )
beta : -1.35587 ( 1.35612 0.150575 )
Epeak [keV] : 111.589 ( -60.8852 307.966 )
Norm@50keV : 0.169725 ( -0.0847509 1.13614 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.42 using 59 PHA bins.
# Reduced chi-squared = 0.6076 for 55 degrees of freedom
# Null hypothesis probability = 9.905313e-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] : 19.2206 ( )
R^2/D10^2 : 0.533634 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 145.93 using 59 PHA bins.
# Reduced chi-squared = 2.5602 for 57 degrees of freedom
# Null hypothesis probability = 9.747140e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.859e-08 3.165e-09
25- 50 1.871e-07 1.010e-08
50-150 5.091e-07 3.365e-08
15-150 7.348e-07 3.555e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 42.0118 (-1.65181 1.65143)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 111.51 using 59 PHA bins.
# Reduced chi-squared = 1.9562 for 57 degrees of freedom
# Null hypothesis probability = 2.150870e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.046e-07 4.685e-09
25- 50 2.012e-07 8.300e-09
50-150 4.413e-07 1.965e-08
15-150 7.471e-07 3.495e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.81829 (-1.49551 1.67492)
R1^2/D10^2 : 3.85283 (-1.46436 2.88291)
kT2 [keV] : 32.8490 (-4.87066 8.49934)
R2^2/D10^2 : 7.46457E-02 (-0.0395043 0.0560426)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.07 using 59 PHA bins.
# Reduced chi-squared = 0.6741 for 55 degrees of freedom
# Null hypothesis probability = 9.696302e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.959e-08 1.121e-08
25- 50 1.948e-07 2.215e-08
50-150 5.988e-07 9.915e-08
15-150 8.632e-07 1.245e-07
Plot creation:
Tue Feb 10 14:15:00 EST 2015