batgrbproduct Analysis for Trigger=618402
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): Wed Nov 12 20:57:22 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger618402/GCN5_download_cron
======================================================================
Trigger: 00618402 Segment: 000
BAT Trigger Time: 437476000 [s; MET]
Trigger Stop: 437476064 [s; MET]
UTC: 2014-11-12T09:06:27.222700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 189.977449778676 Dec: 15.4789759855643 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.3
Flight Position: [ source = BAT ]
RA: 189.977449778676 Dec: 15.4789759855643 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 190.012669520505 Dec: 15.4540232100627 [deg; J2000]
{ 12h 40m 03.0s , +15d 27' 14.5" }
+/- 3.86826020432153 [arcmin] (estimated 90% radius based on SNR)
+/- 2.40457755101767 [arcmin] (formal 1-sigma fit error)
SNR: 4.40362436411309
Angular difference between Flight and Ground position is 2.527743 arcmin
Partial Coding Fraction: 0.921875 [ 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 0.222574 0.164822 0.024596 -0.055531
0.046952 0.049181 0.044200 0.043203 [error]
Peak 0.222574 0.164822 0.024596 -0.055531
0.046952 0.049181 0.044200 0.043203 [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 5.58e-08 6.48e-08 5.41e-08 7.61e-08 2.02e-07 2.51e-07 erg/cm2
Error 2.01e-08 2.29e-08 3.47e-08 1.05e-07 8.37e-08 1.46e-07 erg/cm2
Peak flux Power-law 2.86e-02 1.84e-02 7.69e-03 4.38e-03 5.69e-02 5.90e-02 ph/cm2/s
Error 1.05e-02 6.31e-03 4.77e-03 5.66e-03 1.79e-02 1.91e-02 ph/cm2/s
Fluence Cutoff-PL 5.57e-08 8.04e-08 2.34e-08 6.33e-10 1.60e-07 1.60e-07 erg/cm2
Error 2.26e-08 3.30e-08 3.93e-08 6.86e-08 7.52e-08 1.17e-07 erg/cm2
Peak flux Cutoff-PL 2.79e-02 2.32e-02 3.72e-03 5.54e-05 5.48e-02 5.48e-02 ph/cm2/s
Error 1.17e-02 9.04e-03 5.62e-03 3.80e-03 1.69e-02 1.69e-02 ph/cm2/s
Fluence Band 5.55e-08 7.90e-08 2.89e-08 1.02e-08 1.70e-07 1.75e-07 erg/cm2
Error 2.50e-08 -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- 5.51e-02 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 2.260 0.624 - - 3.33e-04 1.60e-04 54.290 57
CPL -0.113 4.652 28.3 0.0 1.36e-02 0.00e+00 52.430 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.260 0.624 - - 3.33e-04 1.60e-04 54.290 57
CPL -0.113 4.652 28.3 0.0 1.36e-02 0.00e+00 52.430 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 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
190.0127 +15.4540 0.0437 24.3 -153.2 0.4334 4.4 TRIG_00618402
------------------------------------------
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: 2.25955 ( -0.556537 0.691216 )
Norm@50keV : 3.32686E-04 ( -0.000158874 0.000161607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.29 using 59 PHA bins.
# Reduced chi-squared = 0.9524 for 57 degrees of freedom
# Null hypothesis probability = 5.774336e-01
Photon flux (15-150 keV) in 64 sec: 5.68562E-02 ( -0.0178092 0.017891 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01981e-07 ( -7.85056e-08 8.88704e-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: -0.113207 ( -6.68151 2.62208 )
Epeak [keV] : 28.2642 ( )
Norm@50keV : 1.35925E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.43 using 59 PHA bins.
# Reduced chi-squared = 0.9363 for 56 degrees of freedom
# Null hypothesis probability = 6.106637e-01
Photon flux (15-150 keV) in 64 sec: 5.48030E-02 ( -0.0166813 0.017151 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6017e-07 ( -5.77152e-08 9.27667e-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 : 0.581257 ( -2.89292 -0.0382335 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 28.4879 ( -8.86442 199.803 )
Norm@50keV : 2.87759E-02 ( -0.0293105 21.3389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.40 using 59 PHA bins.
# Reduced chi-squared = 0.9528 for 55 degrees of freedom
# Null hypothesis probability = 5.744614e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69884e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.36161 (-2.02821 2.69285)
R^2/D10^2 : 9.33164E-02 (-0.0933158 0.248164)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.57 using 59 PHA bins.
# Reduced chi-squared = 0.9223 for 57 degrees of freedom
# Null hypothesis probability = 6.418165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.462e-08 3.370e-08
25- 50 8.232e-08 5.146e-08
50-150 1.631e-08 1.320e-08
15-150 1.532e-07 9.571e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.2334 (-18.4778 58.9902)
Norm : 0.402276 (-0.176851 0.360554)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9312 for 57 degrees of freedom
# Null hypothesis probability = 6.230110e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-08 3.098e-08
25- 50 7.176e-08 4.378e-08
50-150 4.965e-08 4.112e-08
15-150 1.784e-07 1.146e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.10857 (-5.16558 -5.16558)
R1^2/D10^2 : 0.195720 (-0.191014 -0.191014)
kT2 [keV] : 9.67646 (-9.94609 -9.94609)
R2^2/D10^2 : 1.94986E-02 (-0.0157638 0.303469)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.32 using 59 PHA bins.
# Reduced chi-squared = 0.9513 for 55 degrees of freedom
# Null hypothesis probability = 5.776397e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.668e-08 6.496e-08
25- 50 7.859e-08 6.618e-08
50-150 2.747e-08 3.277e-08
15-150 1.627e-07 1.424e-07
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: 2.25955 ( -0.556537 0.691216 )
Norm@50keV : 3.32686E-04 ( -0.000158874 0.000161607 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.29 using 59 PHA bins.
# Reduced chi-squared = 0.9524 for 57 degrees of freedom
# Null hypothesis probability = 5.774336e-01
Photon flux (15-150 keV) in 64 sec: 5.68562E-02 ( -0.0178092 0.017891 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01981e-07 ( -7.85056e-08 8.88704e-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: -0.113207 ( -6.68151 2.62208 )
Epeak [keV] : 28.2642 ( )
Norm@50keV : 1.35925E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.43 using 59 PHA bins.
# Reduced chi-squared = 0.9363 for 56 degrees of freedom
# Null hypothesis probability = 6.106637e-01
Photon flux (15-150 keV) in 64 sec: 5.48030E-02 ( -0.0166813 0.017151 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6017e-07 ( -5.77152e-08 9.27667e-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 : 0.581257 ( -2.89292 -0.0382335 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 28.4879 ( -8.86442 243.089 )
Norm@50keV : 2.87759E-02 ( -0.0293105 21.3389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.40 using 59 PHA bins.
# Reduced chi-squared = 0.9528 for 55 degrees of freedom
# Null hypothesis probability = 5.744614e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.69884e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.36161 (-2.02821 2.69285)
R^2/D10^2 : 9.33164E-02 (-0.0933158 0.248164)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.57 using 59 PHA bins.
# Reduced chi-squared = 0.9223 for 57 degrees of freedom
# Null hypothesis probability = 6.418165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.462e-08 3.360e-08
25- 50 8.232e-08 5.136e-08
50-150 1.631e-08 1.350e-08
15-150 1.532e-07 9.693e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.2334 (-18.4778 58.9902)
Norm : 0.402276 (-0.176851 0.360554)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.08 using 59 PHA bins.
# Reduced chi-squared = 0.9312 for 57 degrees of freedom
# Null hypothesis probability = 6.230110e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.703e-08 3.201e-08
25- 50 7.176e-08 4.416e-08
50-150 4.965e-08 4.083e-08
15-150 1.784e-07 1.147e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.10857 (-5.16558 -5.16558)
R1^2/D10^2 : 0.195720 (-0.191014 -0.191014)
kT2 [keV] : 9.67646 (-9.94609 -9.94609)
R2^2/D10^2 : 1.94986E-02 (-0.0157638 0.303469)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.32 using 59 PHA bins.
# Reduced chi-squared = 0.9513 for 55 degrees of freedom
# Null hypothesis probability = 5.776397e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.668e-08 7.216e-08
25- 50 7.859e-08 8.813e-08
50-150 2.747e-08 3.376e-08
15-150 1.627e-07 1.924e-07
Plot creation:
Wed Nov 12 21:01:43 EST 2014