batgrbproduct Analysis for Trigger=689956
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): Thu Jun 9 21:32:00 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger689956/batgroup_hand_proc
======================================================================
Trigger: 00689956 Segment: 000
BAT Trigger Time: 487131680 [s; MET]
Trigger Stop: 487132624 [s; MET]
UTC: 2016-06-09T02:21:03.610920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 266.42190704556 Dec: -29.0084813194078 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.91
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.91
Flight Position: [ source = BAT ]
RA: 266.42190704556 Dec: -29.0084813194078 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 266.407803770515 Dec: -29.0627586982363 [deg; J2000]
{ 17h 45m 37.9s , -29d 03' 45.9" }
+/- 2.54659724427335 [arcmin] (estimated 90% radius based on SNR)
+/- 1.35380975413751 [arcmin] (formal 1-sigma fit error)
SNR: 8.00156881459646
Angular difference between Flight and Ground position is 3.339625 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 944 +/-
Measured from: 0
to: 944 [s; relative to TRIGTIME]
T50: 944 +/-
Measured from: 0
to: 944 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 944 second)
Measured from: 0
to: 944 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 944 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.312096 2.334193 1.318169 0.322297
0.205313 0.175494 0.146737 0.125594 [error]
Peak 2.312096 2.334193 1.318169 0.322297
0.205313 0.175494 0.146737 0.125594 [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 6.29e-07 9.49e-07 1.07e-06 2.31e-06 3.34e-06 4.96e-06 erg/cm2
Error 8.60e-08 8.08e-08 1.42e-07 6.37e-07 3.26e-07 7.64e-07 erg/cm2
Peak flux Power-law 2.16e-02 1.80e-02 1.02e-02 8.50e-03 5.35e-02 5.83e-02 ph/cm2/s
Error 3.02e-03 1.55e-03 1.30e-03 2.18e-03 4.64e-03 4.94e-03 ph/cm2/s
Fluence Cutoff-PL 6.09e-07 9.76e-07 1.07e-06 1.48e-06 3.25e-06 4.13e-06 erg/cm2
Error 9.95e-08 1.03e-07 1.48e-07 1.19e-06 3.85e-07 1.07e-06 erg/cm2
Peak flux Cutoff-PL 2.09e-02 1.84e-02 1.02e-02 6.00e-03 5.28e-02 5.55e-02 ph/cm2/s
Error 3.09e-03 1.45e-03 1.34e-03 4.00e-03 4.99e-03 6.77e-03 ph/cm2/s
Fluence Band 5.96e-07 9.82e-07 1.06e-06 1.82e-06 3.25e-06 4.46e-06 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 1.823 0.162 - - 3.85e-04 3.69e-05 75.970 57
CPL 1.568 0.667 76.4 -4.1 5.30e-04 5.11e-04 75.510 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 1.823 0.162 - - 3.85e-04 3.69e-05 75.970 57
CPL 1.568 0.667 76.4 -4.1 5.30e-04 5.11e-04 75.510 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 944.000 0.000 944.000
T90 944.000 0.000 944.000
T50 944.000 0.000 944.000
Peak 944.000 0.000 944.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
266.4078 -29.0628 0.0240 8.2984 -84.8610 6.2112555 8.002 TRIG_00689956
Foreground time interval of the image:
0.000 944.000 (delta_t = 944.000 [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 944.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82334 ( -0.160145 0.164123 )
Norm@50keV : 3.84731E-04 ( -3.71298e-05 3.65798e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.97 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.729243e-02
Photon flux (15-150 keV) in 944 sec: 5.35023E-02 ( -0.00463449 0.00464277 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34115e-06 ( -3.241e-07 3.28491e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 944.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56756 ( -0.726872 0.607014 )
Epeak [keV] : 76.3928 ( -68.1892 -76.3967 )
Norm@50keV : 5.29814E-04 ( -0.000255171 0.000767624 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.51 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 56 degrees of freedom
# Null hypothesis probability = 4.220123e-02
Photon flux (15-150 keV) in 944 sec: 5.27509E-02 ( -0.005006 0.0049751 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2529e-06 ( -3.88786e-07 3.82046e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 944.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.37991 ( 1.39108 1.39108 )
beta : -2.05395 ( 2.05962 0.373745 )
Epeak [keV] : 58.6228 ( -60.3675 61.7872 )
Norm@50keV : 6.84722E-04 ( -0.000258829 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.26 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Null hypothesis probability = 3.617354e-02
Photon flux (15-150 keV) in 944 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24559e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7928 (-1.19102 1.34097)
R^2/D10^2 : 1.32227E-02 (-0.00439198 0.00651791)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.01 using 59 PHA bins.
# Reduced chi-squared = 1.8247 for 57 degrees of freedom
# Null hypothesis probability = 1.435508e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.665e-07 5.768e-08
25- 50 1.130e-06 1.251e-07
50-150 9.338e-07 1.902e-07
15-150 2.430e-06 2.492e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.0215 (-26.7616 47.6843)
Norm : 0.235749 (-0.0285276 0.0344899)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.93 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 57 degrees of freedom
# Null hypothesis probability = 4.762541e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.816e-07 8.076e-08
25- 50 9.994e-07 9.690e-08
50-150 1.592e-06 5.740e-07
15-150 3.173e-06 6.230e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.80181 (-1.49366 3.00071)
R1^2/D10^2 : 0.240590 (-0.189873 1.02561)
kT2 [keV] : 17.3033 (-3.38826 12.3632)
R2^2/D10^2 : 2.61039E-03 (-0.00227749 0.0036757)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.43 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 55 degrees of freedom
# Null hypothesis probability = 2.070975e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.180e-07 2.988e-07
25- 50 9.474e-07 3.261e-07
50-150 1.451e-06 5.941e-07
15-150 3.017e-06 1.018e-06
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 944.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82334 ( -0.160145 0.164123 )
Norm@50keV : 3.84731E-04 ( -3.71298e-05 3.65798e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.97 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.729243e-02
Photon flux (15-150 keV) in 944 sec: 5.35023E-02 ( -0.00463449 0.00464277 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34115e-06 ( -3.241e-07 3.28491e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 944.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56756 ( -0.726872 0.607014 )
Epeak [keV] : 76.3928 ( -68.1892 -76.3967 )
Norm@50keV : 5.29814E-04 ( -0.000255171 0.000767624 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.51 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 56 degrees of freedom
# Null hypothesis probability = 4.220123e-02
Photon flux (15-150 keV) in 944 sec: 5.27509E-02 ( -0.005006 0.0049751 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2529e-06 ( -3.88786e-07 3.82046e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 944.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.37991 ( 1.39108 1.39108 )
beta : -2.05395 ( 2.05962 0.373745 )
Epeak [keV] : 58.6228 ( -60.3675 61.7872 )
Norm@50keV : 6.84722E-04 ( -0.000258829 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.26 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 55 degrees of freedom
# Null hypothesis probability = 3.617354e-02
Photon flux (15-150 keV) in 944 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.24559e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7928 (-1.19102 1.34097)
R^2/D10^2 : 1.32227E-02 (-0.00439198 0.00651791)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.01 using 59 PHA bins.
# Reduced chi-squared = 1.8247 for 57 degrees of freedom
# Null hypothesis probability = 1.435508e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.665e-07 6.499e-08
25- 50 1.130e-06 1.251e-07
50-150 9.338e-07 1.865e-07
15-150 2.430e-06 2.723e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.0215 (-26.7616 47.6843)
Norm : 0.235749 (-0.0285276 0.0344899)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.93 using 59 PHA bins.
# Reduced chi-squared = 1.332 for 57 degrees of freedom
# Null hypothesis probability = 4.762541e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.816e-07 7.373e-08
25- 50 9.994e-07 9.964e-08
50-150 1.592e-06 6.226e-07
15-150 3.173e-06 6.160e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.80181 (-1.49366 3.00071)
R1^2/D10^2 : 0.240590 (-0.189873 1.02561)
kT2 [keV] : 17.3033 (-3.38826 12.3632)
R2^2/D10^2 : 2.61039E-03 (-0.00227749 0.0036757)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.43 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 55 degrees of freedom
# Null hypothesis probability = 2.070975e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.180e-07 2.929e-07
25- 50 9.474e-07 3.069e-07
50-150 1.451e-06 6.160e-07
15-150 3.017e-06 9.888e-07
Plot creation:
Thu Jun 9 21:48:31 EDT 2016