batgrbproduct analysis for trigger=784154
batgrbproduct Analysis for Trigger=784154
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Mon Oct 30 16:54:13 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger784154/GCN5_download_cron
======================================================================
Trigger: 00784154 Segment: 000
BAT Trigger Time: 530996808 [s; MET]
Trigger Stop: 530996872 [s; MET]
UTC: 2017-10-29T19:06:28.082240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.9423460045622 Dec: 22.1976241360044 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.62
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 16.62
Flight Position: [ source = BAT ]
RA: 83.9423460045622 Dec: 22.1976241360044 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.9327224565244 Dec: 22.1976878851795 [deg; J2000]
{ 05h 35m 43.9s , +22d 11' 51.7" }
+/- 1.3675296873934 [arcmin] (estimated 90% radius based on SNR)
+/- 0.517171378854543 [arcmin] (formal 1-sigma fit error)
SNR: 19.4501522013696
Angular difference between Flight and Ground position is 0.534632 arcmin
Partial Coding Fraction: 0.5625 [ 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 0.992524 0.905450 0.578158 0.101792
0.066049 0.068365 0.059079 0.052552 [error]
Peak 0.992524 0.905450 0.578158 0.101792
0.066049 0.068365 0.059079 0.052552 [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 3.24e-07 4.28e-07 4.15e-07 7.18e-07 1.40e-06 1.89e-06 erg/cm2
Error 3.94e-08 3.40e-08 5.88e-08 2.06e-07 1.31e-07 2.65e-07 erg/cm2
Peak flux Power-law 1.65e-01 1.21e-01 5.85e-02 4.01e-02 3.64e-01 3.85e-01 ph/cm2/s
Error 2.05e-02 9.55e-03 7.98e-03 1.07e-02 2.93e-02 3.04e-02 ph/cm2/s
Fluence Cutoff-PL 3.26e-07 4.29e-07 4.16e-07 7.09e-07 1.40e-06 1.83e-06 erg/cm2
Error 3.89e-08 3.40e-08 5.86e-08 2.28e-07 1.30e-07 3.33e-07 erg/cm2
Peak flux Cutoff-PL 1.65e-01 1.21e-01 5.85e-02 3.98e-02 3.63e-01 3.84e-01 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- 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 2.046 0.163 - - 2.37e-03 2.39e-04 47.890 57
CPL 2.155 0.266 73.8 0.0 2.06e-03 0.00e+00 47.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.046 0.163 - - 2.37e-03 2.39e-04 47.890 57
CPL 2.155 0.266 73.8 0.0 2.06e-03 0.00e+00 47.440 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
83.9327 +22.1977 0.0099 36.8 174.0 2.5452 19.5 TRIG_00784154
------------------------------------------
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: 2.04560 ( -0.159297 0.166091 )
Norm@50keV : 2.37303E-03 ( -0.000241464 0.000235715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
# Reduced chi-squared = 0.8401 for 57 degrees of freedom
# Null hypothesis probability = 7.997170e-01
Photon flux (15-150 keV) in 64 sec: 0.363626 ( -0.0292618 0.0293196 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40457e-06 ( -1.30604e-07 1.3237e-07 ) 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: 2.15496 ( -0.414566 0.117673 )
Epeak [keV] : 73.7763 ( )
Norm@50keV : 2.06055E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8471 for 56 degrees of freedom
# Null hypothesis probability = 7.854076e-01
Photon flux (15-150 keV) in 64 sec: 0.363480 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39718e-06 ( -1.23782e-07 1.35264e-07 ) 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 : -1.49001 ( 1.49042 1.49042 )
beta : -2.06923 ( -0.237529 0.176921 )
Epeak [keV] : 23.2445 ( -23.0955 -23.0955 )
Norm@50keV : 6.13086E-03 ( -0.00373246 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.80 using 59 PHA bins.
# Reduced chi-squared = 0.8690 for 55 degrees of freedom
# Null hypothesis probability = 7.437942e-01
Photon flux (15-150 keV) in 64 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] : 9.23367 (-1.07605 1.26562)
R^2/D10^2 : 0.215062 (-0.0841327 0.135959)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.14 using 59 PHA bins.
# Reduced chi-squared = 1.8621 for 57 degrees of freedom
# Null hypothesis probability = 8.477918e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.314e-07 3.654e-08
25- 50 5.117e-07 5.408e-08
50-150 2.110e-07 4.797e-08
15-150 9.541e-07 9.792e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.5024 (-16.2949 24.7484)
Norm : 1.77343 (-0.242841 0.278305)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 57 degrees of freedom
# Null hypothesis probability = 5.402692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.900e-07 3.162e-08
25- 50 4.568e-07 4.000e-08
50-150 5.709e-07 1.113e-07
15-150 1.318e-06 1.427e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.48584 (-0.832224 0.932067)
R1^2/D10^2 : 1.37231 (-0.638483 1.35383)
kT2 [keV] : 24.2127 (-5.33154 9.21956)
R2^2/D10^2 : 4.21397E-03 (-0.00279344 0.00633003)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.94 using 59 PHA bins.
# Reduced chi-squared = 0.8170 for 55 degrees of freedom
# Null hypothesis probability = 8.316114e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.331e-07 9.072e-08
25- 50 4.047e-07 8.563e-08
50-150 6.956e-07 3.665e-07
15-150 1.433e-06 3.984e-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: 2.04560 ( -0.159297 0.166091 )
Norm@50keV : 2.37303E-03 ( -0.000241464 0.000235715 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
# Reduced chi-squared = 0.8401 for 57 degrees of freedom
# Null hypothesis probability = 7.997170e-01
Photon flux (15-150 keV) in 64 sec: 0.363626 ( -0.0292618 0.0293196 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40457e-06 ( -1.30604e-07 1.3237e-07 ) 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: 2.15496 ( -0.414566 0.117714 )
Epeak [keV] : 73.7763 ( )
Norm@50keV : 2.06055E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.44 using 59 PHA bins.
# Reduced chi-squared = 0.8471 for 56 degrees of freedom
# Null hypothesis probability = 7.854076e-01
Photon flux (15-150 keV) in 64 sec: 0.363480 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39718e-06 ( -1.23782e-07 1.35264e-07 ) 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 : -1.49001 ( 1.49042 1.49042 )
beta : -2.06923 ( -0.237529 0.176921 )
Epeak [keV] : 23.2445 ( -23.0955 -23.0955 )
Norm@50keV : 6.13086E-03 ( -0.00373246 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.80 using 59 PHA bins.
# Reduced chi-squared = 0.8690 for 55 degrees of freedom
# Null hypothesis probability = 7.437942e-01
Photon flux (15-150 keV) in 64 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] : 9.23367 (-1.07605 1.26562)
R^2/D10^2 : 0.215062 (-0.0841327 0.135959)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 106.14 using 59 PHA bins.
# Reduced chi-squared = 1.8621 for 57 degrees of freedom
# Null hypothesis probability = 8.477918e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.314e-07 3.139e-08
25- 50 5.117e-07 4.854e-08
50-150 2.110e-07 4.986e-08
15-150 9.541e-07 1.014e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.5024 (-16.2949 24.7484)
Norm : 1.77343 (-0.242841 0.278305)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.27 using 59 PHA bins.
# Reduced chi-squared = 0.9696 for 57 degrees of freedom
# Null hypothesis probability = 5.402692e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.900e-07 3.034e-08
25- 50 4.568e-07 3.942e-08
50-150 5.709e-07 1.277e-07
15-150 1.318e-06 1.408e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.48584 (-0.832224 0.932067)
R1^2/D10^2 : 1.37231 (-0.638483 1.35383)
kT2 [keV] : 24.2127 (-5.33154 9.21956)
R2^2/D10^2 : 4.21397E-03 (-0.00279344 0.00633003)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.94 using 59 PHA bins.
# Reduced chi-squared = 0.8170 for 55 degrees of freedom
# Null hypothesis probability = 8.316114e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.331e-07 9.098e-08
25- 50 4.047e-07 8.749e-08
50-150 6.956e-07 3.499e-07
15-150 1.433e-06 4.368e-07
Plot creation:
Mon Oct 30 16:58:11 EDT 2017