batgrbproduct Analysis for Trigger=622006
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 Dec 22 20:31:48 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger622006/batgroup_hand_proc
======================================================================
Trigger: 00622006 Segment: 000
BAT Trigger Time: 440842043.904 [s; MET]
Trigger Stop: 440842044.928 [s; MET]
UTC: 2014-12-21T08:07:10.958720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.269160599318 Dec: 8.21006046919977 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.98
Image Trigger?: NO
Rate S/N Ratio: 41.194659848092 [ if not an image trigger ]
Image S/N Ratio: 14.98
Flight Position: [ source = BAT ]
RA: 198.269160599318 Dec: 8.21006046919977 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 198.28110214492 Dec: 8.19831568570567 [deg; J2000]
{ 13h 13m 07.5s , +08d 11' 53.9" }
+/- 1.03905321944029 [arcmin] (estimated 90% radius based on SNR)
+/- 0.342493264429319 [arcmin] (formal 1-sigma fit error)
SNR: 28.7971895631093
Angular difference between Flight and Ground position is 0.999746 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 33.1719999313354 +/- 4.10187130304949
Measured from: -17.4959999918938
to: 15.6759999394417 [s; relative to TRIGTIME]
T50: 12.1919999718666 +/- 3.20888827249804
Measured from: -1.54799997806549
to: 10.6439999938011 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0959999561309814
to: 0.904000043869019 [s; relative to TRIGTIME]
Total Fluence
Measured from: -24.1119999885559
to: 20.3320000171661 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.191030 1.382259 0.802514 0.182887
0.051235 0.051698 0.045221 0.038220 [error]
Peak 0.083086 0.142503 0.125286 0.042971
0.009142 0.010028 0.009363 0.007181 [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 3.77e-07 5.69e-07 6.44e-07 1.38e-06 2.00e-06 2.97e-06 erg/cm2
Error 2.90e-08 2.67e-08 4.50e-08 2.04e-07 1.04e-07 2.42e-07 erg/cm2
Peak flux Power-law 8.08e-01 9.65e-01 8.34e-01 1.23e+00 3.04e+00 3.84e+00 ph/cm2/s
Error 1.20e-01 8.61e-02 7.49e-02 2.37e-01 2.38e-01 3.12e-01 ph/cm2/s
Fluence Cutoff-PL 3.50e-07 5.97e-07 6.48e-07 6.56e-07 1.91e-06 2.25e-06 erg/cm2
Error 3.53e-08 3.37e-08 4.84e-08 3.79e-07 1.24e-07 3.99e-07 erg/cm2
Peak flux Cutoff-PL 7.92e-01 9.72e-01 8.42e-01 1.10e+00 3.03e+00 3.71e+00 ph/cm2/s
Error 1.40e-01 9.41e-02 8.57e-02 3.66e-01 1.85e-01 4.85e-01 ph/cm2/s
Fluence Band 3.38e-07 6.04e-07 6.32e-07 9.67e-07 1.92e-06 2.55e-06 erg/cm2
Error 3.65e-08 3.63e-08 3.74e-08 -------- 1.18e-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 1.822 0.088 - - 4.90e-03 2.50e-04 62.440 57
CPL 1.329 0.400 63.4 33.2 8.92e-03 4.55e-03 57.460 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 1.212 0.136 - - 2.59e-02 1.97e-03 60.310 57
CPL 1.121 0.362 523.5 0.0 2.86e-02 1.40e-02 60.220 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: 36.096000 sec.
T50 in the 50-300 keV band: 6.848000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 44.444 -24.112 20.332
T90 33.172 -17.496 15.676
T50 12.192 -1.548 10.644
Peak 1.000 -0.096 0.904
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
198.2811 8.1983 0.0067 26.1414 16.6023 3.4715441 28.797 TRIG_00622006
Foreground time interval of the image:
-24.112 16.397 (delta_t = 40.509 [sec])
Background time interval of the image:
-66.603 -24.112 (delta_t = 42.491 [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 -24.112 sec. to 20.332 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82234 ( -0.0873237 0.0886508 )
Norm@50keV : 4.90264E-03 ( -0.000250481 0.000248759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.889410e-01
Photon flux (15-150 keV) in 44.44 sec: 0.681515 ( -0.0327083 0.0327684 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.00439e-06 ( -1.03691e-07 1.04323e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.112 sec. to 20.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32902 ( -0.41991 0.380744 )
Epeak [keV] : 63.3751 ( -11.4569 54.898 )
Norm@50keV : 8.92491E-03 ( -0.0032461 0.00584817 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 56 degrees of freedom
# Null hypothesis probability = 4.208468e-01
Photon flux (15-150 keV) in 44.44 sec: 0.661614 ( -0.035939 0.035934 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9139e-06 ( -1.24014e-07 1.24788e-07 ) ergs/cm2
Band function
Time interval is from -24.112 sec. to 20.332 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.09747 ( -0.492627 0.720896 )
beta : -2.15896 ( 2.16892 0.264617 )
Epeak [keV] : 53.5945 ( -15.0061 27.9572 )
Norm@50keV : 1.22855E-02 ( -0.00593712 0.0226946 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.69 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.484799e-01
Photon flux (15-150 keV) in 44.44 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91636e-06 ( -1.91605e-06 -1.18433e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1637 ( )
R^2/D10^2 : 0.151402 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 130.77 using 59 PHA bins.
# Reduced chi-squared = 2.2941 for 57 degrees of freedom
# Null hypothesis probability = 1.001354e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.108e-07 1.769e-08
25- 50 6.739e-07 3.822e-08
50-150 6.049e-07 6.444e-08
15-150 1.490e-06 7.999e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 98.6547 (-16.1352 21.7684)
Norm : 2.98923 (-0.204715 0.226266)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.40 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 57 degrees of freedom
# Null hypothesis probability = 4.603196e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.472e-07 2.969e-08
25- 50 5.987e-07 3.422e-08
50-150 9.627e-07 2.675e-07
15-150 1.909e-06 2.802e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.85080 (-1.47571 2.73745)
R1^2/D10^2 : 1.35702 (-0.90575 2.70079)
kT2 [keV] : 18.5980 (-3.15863 13.2521)
R2^2/D10^2 : 2.38662E-02 (-0.0201324 0.0280453)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.35 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 55 degrees of freedom
# Null hypothesis probability = 1.405043e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.370e-07 6.935e-08
25- 50 5.936e-07 1.089e-07
50-150 8.916e-07 1.920e-07
15-150 1.822e-06 3.555e-07
Peak spectrum fit
Power-law model
Time interval is from -0.096 sec. to 0.904 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21182 ( -0.135931 0.135092 )
Norm@50keV : 2.58629E-02 ( -0.00197394 0.00197378 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.31 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 57 degrees of freedom
# Null hypothesis probability = 3.571500e-01
Photon flux (15-150 keV) in 1 sec: 3.04092 ( -0.238156 0.238444 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.61523e-07 ( -2.2382e-08 2.25092e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.096 sec. to 0.904 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12129 ( -0.563438 0.159579 )
Epeak [keV] : 523.506 ( -523.604 -523.604 )
Norm@50keV : 2.85683E-02 ( -0.00441978 0.0235781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.22 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.257475e-01
Photon flux (15-150 keV) in 1 sec: 3.02938 ( -0.24688 0.12277 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.60196e-07 ( -2.4196e-08 2.3535e-08 ) ergs/cm2
Band function
Time interval is from -0.096 sec. to 0.904 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 8.04420E-02 ( 0.963429 5.95653 )
beta : -1.26987 ( 1.31092 0.223692 )
Epeak [keV] : 48.7637 ( -119.53 -119.53 )
Norm@50keV : 0.188852 ( -0.155204 1.28315e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.83 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 55 degrees of freedom
# Null hypothesis probability = 3.046957e-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] : 18.2045 (-1.8261 2.1096)
R^2/D10^2 : 0.189079 (-0.0576046 0.0797084)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.95 using 59 PHA bins.
# Reduced chi-squared = 1.666 for 57 degrees of freedom
# Null hypothesis probability = 1.196478e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.250e-08 1.885e-09
25- 50 5.830e-08 6.410e-09
50-150 1.406e-07 2.045e-08
15-150 2.114e-07 2.055e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 12.5320 (-0.974724 0.974652)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.61 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.611921e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.120e-08 2.845e-09
25- 50 6.002e-08 1.056e-08
50-150 1.316e-07 4.694e-08
15-150 2.228e-07 5.520e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.47072 (-3.00548 3.51912)
R1^2/D10^2 : 1.06854 (-0.593442 1.39782)
kT2 [keV] : 40.7521 (-14.9662 -41.3016)
R2^2/D10^2 : 1.13029E-02 (-0.009631 0.036733)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.88 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 55 degrees of freedom
# Null hypothesis probability = 2.440115e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.150e-08 6.640e-09
25- 50 6.031e-08 1.760e-08
50-150 1.798e-07 8.365e-08
15-150 2.616e-07 1.055e-07
Plot creation:
Mon Dec 22 20:40:57 EST 2014