batgrbproduct Analysis for Trigger=711158
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 Sep 6 22:41:03 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger711158/GCN5_download_cron
======================================================================
Trigger: 00711158 Segment: 000
BAT Trigger Time: 494820520 [s; MET]
Trigger Stop: 494820584 [s; MET]
UTC: 2016-09-06T02:08:23.181380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.263005616978 Dec: -40.5236437653886 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.17
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.17
Flight Position: [ source = BAT ]
RA: 135.263005616978 Dec: -40.5236437653886 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.420124779543 Dec: -40.5537365758251 [deg; J2000]
{ 09h 01m 40.8s , -40d 33' 13.5" }
+/- 3.54223012377469 [arcmin] (estimated 90% radius based on SNR)
+/- 2.18863374293837 [arcmin] (formal 1-sigma fit error)
SNR: 4.99387051062365
Angular difference between Flight and Ground position is 7.388343 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 211.01599997282 +/- 44.814927872809
Measured from: -11.7479999065399
to: 199.26800006628 [s; relative to TRIGTIME]
T50: 120.395999968052 +/- 32.8982291379813
Measured from: 47.8480001091957
to: 168.244000077248 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -17.0759999752045
to: -16.0759999752045 [s; relative to TRIGTIME]
Total Fluence
Measured from: -52.3000000119209
to: 212.643999993801 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.852049 1.289878 0.170214 0.039470
0.111000 0.108074 0.090244 0.080637 [error]
Peak 0.016829 0.018319 0.017580 0.006955
0.007216 0.006725 0.005641 0.004767 [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 5.92e-07 4.76e-07 2.58e-07 2.04e-07 1.42e-06 1.53e-06 erg/cm2
Error 6.29e-08 5.53e-08 6.11e-08 8.68e-08 1.58e-07 2.01e-07 erg/cm2
Peak flux Power-law 1.43e-01 1.45e-01 1.04e-01 1.18e-01 4.39e-01 5.11e-01 ph/cm2/s
Error 9.15e-02 5.67e-02 4.68e-02 1.20e-01 1.58e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 5.84e-07 5.40e-07 3.59e-08 2.55e-11 1.16e-06 1.16e-06 erg/cm2
Error 7.05e-08 7.72e-08 3.90e-08 4.71e-10 1.22e-07 1.22e-07 erg/cm2
Peak flux Cutoff-PL 1.49e-01 1.47e-01 1.02e-01 1.11e-01 4.41e-01 5.11e-01 ph/cm2/s
Error 9.31e-02 5.76e-02 3.55e-02 1.38e-01 1.58e-01 1.33e-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 2.884 0.214 - - 4.69e-04 8.33e-05 60.860 57
CPL -2.403 2.581 23.2 2.8 2.88e+00 1.41e+02 37.220 56
The chi2 of BB fit is 37.41 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 1.485 0.703 - - 3.53e-03 1.27e-03 53.170 57
CPL 1.500 0.818 9999.4 0.0 3.51e-03 0.00e+00 53.180 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 264.944 -52.300 212.644
T90 211.016 -11.748 199.268
T50 120.396 47.848 168.244
Peak 1.000 -17.076 -16.076
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.4201 -40.5537 0.0384 21.2 -164.2 0.8553 5.0 TRIG_00711158
------------------------------------------
Foreground time interval of the image:
-52.300 72.901 (delta_t = 125.201 [sec])
Background time interval of the image:
-239.000 -52.300 (delta_t = 186.700 [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 -52.300 sec. to 212.644 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88361 ( -0.206337 0.221285 )
Norm@50keV : 4.68803E-04 ( -8.20698e-05 8.45754e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.86 using 59 PHA bins.
# Reduced chi-squared = 1.068 for 57 degrees of freedom
# Null hypothesis probability = 3.386685e-01
Photon flux (15-150 keV) in 264.9 sec: 0.118619 ( -0.010892 0.0108928 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41772e-06 ( -1.5565e-07 1.60789e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -52.300 sec. to 212.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.40332 ( -3.53528 1.62751 )
Epeak [keV] : 23.1512 ( -3.03093 2.54312 )
Norm@50keV : 2.88432 ( -2.8199 279.606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.22 using 59 PHA bins.
# Reduced chi-squared = 0.6646 for 56 degrees of freedom
# Null hypothesis probability = 9.749445e-01
Photon flux (15-150 keV) in 264.9 sec: 0.111880 ( -0.010797 0.010788 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15944e-06 ( -1.19475e-07 1.2551e-07 ) ergs/cm2
Band function
Time interval is from -52.300 sec. to 212.644 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.06233 ( -2.6353 -3.06233 )
beta : -4.88403 ( 4.88403 1.27393 )
Epeak [keV] : 23.1800 ( -2.1546 1.8282 )
Norm@50keV : 9.34034 ( -9.34034 101.427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.15 using 59 PHA bins.
# Reduced chi-squared = 0.6572 for 55 degrees of freedom
# Null hypothesis probability = 9.767982e-01
Photon flux (15-150 keV) in 264.9 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] : 5.79377 (-0.453844 0.491722)
R^2/D10^2 : 0.523145 (-0.163087 0.23871)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.41 using 59 PHA bins.
# Reduced chi-squared = 0.6563 for 57 degrees of freedom
# Null hypothesis probability = 9.791330e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.868e-07 8.397e-08
25- 50 5.417e-07 7.695e-08
50-150 4.289e-08 1.691e-08
15-150 1.171e-06 1.461e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.4610 (-3.11714 3.94137)
Norm : 1.50248 (-0.309446 0.402525)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.39 using 59 PHA bins.
# Reduced chi-squared = 0.8139 for 57 degrees of freedom
# Null hypothesis probability = 8.411996e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.029e-07 6.636e-08
25- 50 5.169e-07 6.967e-08
50-150 1.478e-07 6.521e-08
15-150 1.268e-06 1.389e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 45.8054 (-47.4809 -47.4809)
R1^2/D10^2 : 2.95471E-05 (-2.55886e-05 0.687879)
kT2 [keV] : 5.69515 (-0.54559 0.516003)
R2^2/D10^2 : 0.557070 (-0.170872 0.410861)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.40 using 59 PHA bins.
#Fit statistic : Chi-Squared = 36.15 using 59 PHA bins.
# Reduced chi-squared = 0.6800 for 55 degrees of freedom
# Reduced chi-squared = 0.6572 for 55 degrees of freedom
# Null hypothesis probability = 9.667272e-01
# Null hypothesis probability = 9.768112e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.873e-07 1.118e-05
25- 50 5.385e-07 3.558e-05
50-150 4.897e-08 3.176e-05
15-150 1.175e-06 1.126e-04
Peak spectrum fit
Power-law model
Time interval is from -17.076 sec. to -16.076 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48496 ( -0.704684 0.701144 )
Norm@50keV : 3.52890E-03 ( -0.00129231 0.00124692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9329 for 57 degrees of freedom
# Null hypothesis probability = 6.194204e-01
Photon flux (15-150 keV) in 1 sec: 0.438798 ( -0.15791 0.158496 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35611e-08 ( -1.29994e-08 1.33296e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.076 sec. to -16.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50013 ( -0.946902 0.688594 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.50963E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.18 using 59 PHA bins.
# Reduced chi-squared = 0.9496 for 56 degrees of freedom
# Null hypothesis probability = 5.824182e-01
Photon flux (15-150 keV) in 1 sec: 0.441342 ( -0.160836 0.156092 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.35381e-08 ( -1.30235e-08 1.31018e-08 ) ergs/cm2
Band function
Time interval is from -17.076 sec. to -16.076 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10669 ( 1.1042 1.1042 )
beta : -1.48754 ( 1.48769 0.706462 )
Epeak [keV] : 46.0221 ( -45.2676 -45.2676 )
Norm@50keV : 7.37734E-03 ( -0.00795164 489779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.17 using 59 PHA bins.
# Reduced chi-squared = 0.9667 for 55 degrees of freedom
# Null hypothesis probability = 5.448657e-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] : 16.6649 (-8.53082 18.0735)
R^2/D10^2 : 3.25656E-02 (-0.0314489 0.366496)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.29 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.642900e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.852e-09 1.231e-09
25- 50 8.062e-09 5.125e-09
50-150 1.588e-08 1.093e-08
15-150 2.580e-08 1.737e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-199.362 -199.362)
Norm : 1.79069 (-0.627021 0.6286)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.52 using 59 PHA bins.
# Reduced chi-squared = 0.9390 for 57 degrees of freedom
# Null hypothesis probability = 6.062620e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.459e-09 2.821e-09
25- 50 8.578e-09 5.300e-09
50-150 1.881e-08 1.189e-08
15-150 3.185e-08 1.965e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74325 (-3.38142 8.69668)
R1^2/D10^2 : 1.18040 (-1.13593 71.6052)
kT2 [keV] : 34.3487 (-17.3991 -34.3572)
R2^2/D10^2 : 2.64628E-03 (-0.00260949 0.00707631)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.71 using 59 PHA bins.
# Reduced chi-squared = 0.9584 for 55 degrees of freedom
# Null hypothesis probability = 5.624486e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.293e-09 3.608e-09
25- 50 7.294e-09 4.525e-09
50-150 2.304e-08 1.490e-08
15-150 3.563e-08 1.997e-08
Plot creation:
Tue Sep 6 22:49:37 EDT 2016