batgrbproduct Analysis for Trigger=704572
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): Sun Jul 17 08:02:59 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger704572/GCN5_download_cron
======================================================================
Trigger: 00704572 Segment: 000
BAT Trigger Time: 490324126.592 [s; MET]
Trigger Stop: 490324128.64 [s; MET]
UTC: 2016-07-16T01:08:30.026020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 190.54362714462 Dec: -61.3659454743721 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.92
Image Trigger?: NO
Rate S/N Ratio: 15.0332963783729 [ if not an image trigger ]
Image S/N Ratio: 8.92
Flight Position: [ source = BAT ]
RA: 190.54362714462 Dec: -61.3659454743721 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 190.501403784545 Dec: -61.3642006281061 [deg; J2000]
{ 12h 42m 00.3s , -61d 21' 51.1" }
+/- 2.03253153088693 [arcmin] (estimated 90% radius based on SNR)
+/- 0.877577890464579 [arcmin] (formal 1-sigma fit error)
SNR: 11.042441478359
Angular difference between Flight and Ground position is 1.218580 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 6.39199995994568 +/- 0.580386075609438
Measured from: -0.0159999132156372
to: 6.37600004673004 [s; relative to TRIGTIME]
T50: 4.33599996566772 +/- 1.35595869920366
Measured from: 1.14800012111664
to: 5.48400008678436 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.948000013828278
to: 1.94800001382828 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.431999981403351
to: 6.72799998521805 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.166728 0.136325 0.054842 0.017327
0.018494 0.018480 0.015482 0.013327 [error]
Peak 0.038400 0.035691 0.019177 0.002718
0.007054 0.006975 0.005935 0.004869 [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 5.16e-08 5.86e-08 4.77e-08 6.48e-08 1.82e-07 2.23e-07 erg/cm2
Error 9.29e-09 8.74e-09 1.43e-08 3.74e-08 3.21e-08 5.55e-08 erg/cm2
Peak flux Power-law 3.77e-01 2.73e-01 1.31e-01 8.89e-02 8.23e-01 8.70e-01 ph/cm2/s
Error 9.95e-02 5.50e-02 4.58e-02 5.82e-02 1.63e-01 1.76e-01 ph/cm2/s
Fluence Cutoff-PL 5.17e-08 5.86e-08 4.75e-08 6.37e-08 1.81e-07 2.21e-07 erg/cm2
Error 9.53e-09 9.74e-09 1.58e-08 -------- 3.53e-08 5.37e-08 erg/cm2
Peak flux Cutoff-PL 3.61e-01 3.03e-01 1.21e-01 2.46e-02 8.04e-01 8.09e-01 ph/cm2/s
Error 1.07e-01 7.88e-02 6.20e-02 7.23e-02 1.65e-01 1.87e-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 2.298 0.304 - - 2.65e-03 5.74e-04 55.470 57
CPL 1.964 0.000 4.4 0.0 4.19e-03 0.00e+00 55.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.059 0.374 - - 5.34e-03 1.43e-03 54.970 57
CPL 1.192 1.835 35.0 0.0 1.84e-02 0.00e+00 54.140 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 7.160 -0.432 6.728
T90 6.392 -0.016 6.376
T50 4.336 1.148 5.484
Peak 1.000 0.948 1.948
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
190.5014 -61.3642 0.0174 19.1 69.2 0.3867 11.0 TRIG_00704572
------------------------------------------
Foreground time interval of the image:
-0.432 6.728 (delta_t = 7.160 [sec])
Background time interval of the image:
-239.592 -0.432 (delta_t = 239.160 [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 -0.432 sec. to 6.728 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.29760 ( -0.286789 0.3213 )
Norm@50keV : 2.65394E-03 ( -0.000582695 0.000564515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 0.9731 for 57 degrees of freedom
# Null hypothesis probability = 5.328184e-01
Photon flux (15-150 keV) in 7.16 sec: 0.463181 ( -0.0629433 0.0629437 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81508e-07 ( -3.14013e-08 3.27346e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.432 sec. to 6.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96358 ( )
Epeak [keV] : 4.36684 ( )
Norm@50keV : 4.18860E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.71 using 59 PHA bins.
# Reduced chi-squared = 0.9948 for 56 degrees of freedom
# Null hypothesis probability = 4.858039e-01
Photon flux (15-150 keV) in 7.16 sec: 0.463049 ( -0.065363 0.062854 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81326e-07 ( -3.77296e-08 3.28866e-08 ) ergs/cm2
Band function
Time interval is from -0.432 sec. to 6.728 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.00280 ( 5.0028 5.0028 )
beta : -2.29760 ( -0.321299 0.287188 )
Epeak [keV] : 18.7203 ( -18.7203 -18.7203 )
Norm@50keV : 0.360708 ( -0.0791963 0.0767257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 55 degrees of freedom
# Null hypothesis probability = 4.570477e-01
Photon flux (15-150 keV) in 7.16 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] : 8.42730 (-1.38779 1.57499)
R^2/D10^2 : 0.402326 (-0.198488 0.423487)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.76 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 57 degrees of freedom
# Null hypothesis probability = 1.366757e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.835e-08 9.673e-09
25- 50 7.332e-08 1.584e-08
50-150 2.278e-08 9.380e-09
15-150 1.344e-07 2.678e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.6986 (-13.1507 23.2379)
Norm : 2.89128 (-0.693588 1.01285)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.92 using 59 PHA bins.
# Reduced chi-squared = 0.9985 for 57 degrees of freedom
# Null hypothesis probability = 4.781847e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.819e-08 8.603e-09
25- 50 6.452e-08 1.312e-08
50-150 5.221e-08 2.297e-08
15-150 1.649e-07 3.340e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.85834 (-1.1507 1.70387)
R1^2/D10^2 : 32.4064 (-29.2491 1122.98)
kT2 [keV] : 11.7099 (-2.49471 4.21555)
R2^2/D10^2 : 9.06745E-02 (-0.0668233 0.0489358)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9881 for 55 degrees of freedom
# Null hypothesis probability = 4.995750e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.070e-08 2.683e-08
25- 50 6.133e-08 3.207e-08
50-150 4.656e-08 2.821e-08
15-150 1.586e-07 8.273e-08
Peak spectrum fit
Power-law model
Time interval is from 0.948 sec. to 1.948 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05851 ( -0.353102 0.39535 )
Norm@50keV : 5.33850E-03 ( -0.00145196 0.0014015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.97 using 59 PHA bins.
# Reduced chi-squared = 0.9644 for 57 degrees of freedom
# Null hypothesis probability = 5.516921e-01
Photon flux (15-150 keV) in 1 sec: 0.823092 ( -0.162761 0.162766 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.942e-08 ( -1.19585e-08 1.2557e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.948 sec. to 1.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19152 ( -2.43413 1.23671 )
Epeak [keV] : 34.9931 ( )
Norm@50keV : 1.84451E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.14 using 59 PHA bins.
# Reduced chi-squared = 0.9669 for 56 degrees of freedom
# Null hypothesis probability = 5.454196e-01
Photon flux (15-150 keV) in 1 sec: 0.803934 ( -0.164858 0.165983 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.46556e-08 ( -1.27115e-08 1.52246e-08 ) ergs/cm2
Band function
Time interval is from 0.948 sec. to 1.948 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96857 ( -14.5124 -4.96857 )
beta : -2.47261 ( -0.977542 0.528307 )
Epeak [keV] : 24.6047 ( -6.58283 4.99712 )
Norm@50keV : 1060.46 ( -205.189 7168.63 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.92 using 59 PHA bins.
# Reduced chi-squared = 0.9439 for 55 degrees of freedom
# Null hypothesis probability = 5.931685e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6374e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.36260 (-1.79229 2.43368)
R^2/D10^2 : 0.774356 (-0.489284 1.23766)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.64 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 57 degrees of freedom
# Null hypothesis probability = 4.512709e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.010e-08 3.916e-09
25- 50 1.906e-08 6.748e-09
50-150 5.780e-09 3.383e-09
15-150 3.494e-08 1.223e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.1392 (-22.9497 57.7356)
Norm : 4.52790 (-0.888619 1.13407)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.14 using 59 PHA bins.
# Reduced chi-squared = 0.9498 for 57 degrees of freedom
# Null hypothesis probability = 5.831628e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.126e-08 4.178e-09
25- 50 1.662e-08 1.039e-08
50-150 1.736e-08 1.684e-08
15-150 4.524e-08 3.039e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.80264 (-2.44573 3.0895)
R1^2/D10^2 : 2.42256 (-1.82131 12.315)
kT2 [keV] : 18.5805 (-13.0097 -18.6005)
R2^2/D10^2 : 2.08830E-02 (-0.0205916 0.326527)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.18 using 59 PHA bins.
#Fit statistic : Chi-Squared = 53.03 using 59 PHA bins.
# Reduced chi-squared = 0.9669 for 55 degrees of freedom
# Reduced chi-squared = 0.9643 for 55 degrees of freedom
# Null hypothesis probability = 5.445627e-01
# Null hypothesis probability = 5.500952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.151e-08 7.080e-09
25- 50 1.583e-08 8.620e-09
50-150 1.545e-08 1.086e-08
15-150 4.280e-08 2.309e-08
Plot creation:
Sun Jul 17 08:09:51 EDT 2016