batgrbproduct analysis for trigger=753085
batgrbproduct Analysis for Trigger=753085
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): Wed May 17 06:00:23 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger753085/GCN5_download_cron
======================================================================
Trigger: 00753085 Segment: 000
BAT Trigger Time: 516611361.184 [s; MET]
Trigger Stop: 516611361.2 [s; MET]
UTC: 2017-05-16T07:09:02.116500 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 251.82664791688 Dec: -45.8948386454575 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.03
Image Trigger?: NO
Rate S/N Ratio: 16.4012194668567 [ if not an image trigger ]
Image S/N Ratio: 7.03
Flight Position: [ source = BAT ]
RA: 251.82664791688 Dec: -45.8948386454575 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 251.590852843555 Dec: -45.8094254746484 [deg; J2000]
{ 16h 46m 21.8s , -45d 48' 33.9" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 5.0280601696152 [arcmin] (formal 1-sigma fit error)
SNR: -2.55662966309926
Angular difference between Flight and Ground position is 11.107011 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 575.98399990797 +/- 65.5485799648633
Measured from: 96.6760001182556
to: 672.660000026226 [s; relative to TRIGTIME]
T50: 273.475999951363 +/- 34.4405576918011
Measured from: 307.024000108242
to: 580.500000059605 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 404.103999972343
to: 405.103999972343 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 704.60799998045 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.520913 -0.214696 -0.106415 -0.047550
0.188071 0.172110 0.144418 0.132031 [error]
Peak 0.013347 0.004322 0.012783 0.010708
0.006823 0.006241 0.005388 0.004647 [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 0.00e+001.30e-07 0.00e+001.53e-08 0.00e+007.02e-10 0.00e+001.25e-10 0.00e+001.48e-07 0.00e+001.33e-07 erg/cm2
Error 8.06e-08 3.19e-08 5.35e-08 1.74e-06 1.09e-07 1.75e-06 erg/cm2
Peak flux Power-law 2.87e-02 5.13e-02 7.04e-02 2.00e-01 2.03e-01 3.50e-01 ph/cm2/s
Error 5.59e-02 5.45e-02 5.52e-02 5.36e-01 1.32e-01 3.66e-01 ph/cm2/s
Fluence Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 1.23e-07 2.65e-08 5.35e-08 -------- 1.05e-07 -------- erg/cm2
Peak flux Cutoff-PL 3.06e-02 5.28e-02 7.03e-02 1.90e-01 2.05e-01 3.44e-01 ph/cm2/s
Error 5.57e-02 5.41e-02 4.35e-02 -------- 1.71e-01 -------- ph/cm2/s
Fluence Band 7.37e-08 1.86e-09 1.22e-11 8.01e-14 7.56e-08 7.56e-08 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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 6.335 -1.991 - - 1.17e-06 7.20e-06 42.530 57
CPL 1.000 0.000 50.0 0.0 1.48e-05 0.00e+00 52.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.545 0.995 - - 1.73e-03 1.48e-03 55.170 57
CPL -10.000 0.998 108.1 0.0 1.29e-01 1.07e-01 54.850 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 704.608 0.000 704.608
T90 575.984 96.676 672.660
T50 273.476 307.024 580.500
Peak 1.000 404.104 405.104
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
251.5909 -45.8094 0.0759 4.7 -177.3 -0.0811 -2.6 TRIG_00753085
------------------------------------------
Foreground time interval of the image:
0.000 8.217 (delta_t = 8.217 [sec])
Background time interval of the image:
-239.184 0.000 (delta_t = 239.184 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 157.328800
158.816000 537.396000
538.816000 704.608000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.33532 ( -2.32286 -6.30566 )
Norm@50keV : 1.16924E-06 ( -1.1872e-06 1.3209e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.53 using 59 PHA bins.
# Reduced chi-squared = 0.7461 for 57 degrees of freedom
# Null hypothesis probability = 9.231711e-01
Photon flux (15-150 keV) in 701.7 sec: 0.0 6.98214E-03 ( -0.00422298 0.00494572 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( -1.01521e-07 1.17011e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 157.328800
158.816000 537.396000
538.816000 704.608000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.47977E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.58 using 59 PHA bins.
# Reduced chi-squared = 0.9389 for 56 degrees of freedom
# Null hypothesis probability = 6.052615e-01
Photon flux (15-150 keV) in 701.7 sec: 0.0 7.97929E-03 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 157.328800
158.816000 537.396000
538.816000 704.608000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.79341 ( 0.98395 0.98395 )
beta : -9.37167 ( 2.5 2.5 )
Epeak [keV] : 10.5126 ( -80 -80 )
Norm@50keV : 64.5219 ( -63.7966 4743.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.89 using 59 PHA bins.
# Reduced chi-squared = 0.7617 for 55 degrees of freedom
# Null hypothesis probability = 9.033063e-01
Photon flux (15-150 keV) in 701.7 sec: 0.0 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.56005e-08 ( -7.06886e-08 -7.56005e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 2.30800 (-1.06347 1.36003)
R^2/D10^2 : 6.91520 (-7.4597 2177.6)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.86 using 59 PHA bins.
# Reduced chi-squared = 0.7344 for 57 degrees of freedom
# Null hypothesis probability = 9.336562e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.459e-07 8.266e-08
25- 50 7.679e-09 5.645e-09
50-150 1.073e-12 2.018e-12
15-150 1.536e-07 8.827e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.92513 (-2.30609 4.65227)
Norm : 4.47777 (-4.5175 822.221)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.04 using 59 PHA bins.
# Reduced chi-squared = 0.7376 for 57 degrees of freedom
# Null hypothesis probability = 9.309015e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.393e-07 8.080e-08
25- 50 9.639e-09 6.294e-09
50-150 1.260e-11 1.700e-11
15-150 1.489e-07 9.031e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00110E-04 (-0.00010011 -0.00010011)
R1^2/D10^2 : 7.24188 (-7.24188 -7.24188)
kT2 [keV] : 2.28518 (-1.06843 1.35311)
R2^2/D10^2 : 7.49040 (-7.49048 2193.01)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.87 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.86 using 59 PHA bins.
# Reduced chi-squared = 0.7613 for 55 degrees of freedom
# Reduced chi-squared = 0.7610 for 55 degrees of freedom
# Null hypothesis probability = 9.036767e-01
# Null hypothesis probability = 9.039988e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.410e-07 4.817e+04
25- 50 7.256e-09 3.593e+05
50-150 9.591e-13 9.441e+06
15-150 1.483e-07 9.989e+06
Peak spectrum fit
Power-law model
Time interval is from 404.104 sec. to 405.104 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.545292 ( -0.545121 1.44579 )
Norm@50keV : 1.72720E-03 ( -0.00172706 0.00124181 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 0.9679 for 57 degrees of freedom
# Null hypothesis probability = 5.441055e-01
Photon flux (15-150 keV) in 1 sec: 0.203128 ( -0.125281 0.139308 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26849e-08 ( -2.26849e-08 1.32571e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 404.104 sec. to 405.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99955 ( -0.576072 1.42028 )
Epeak [keV] : 108.058 ( -9999.36 -9999.36 )
Norm@50keV : 0.128965 ( -0.128149 0.086638 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.85 using 59 PHA bins.
# Reduced chi-squared = 0.9795 for 56 degrees of freedom
# Null hypothesis probability = 5.184400e-01
Photon flux (15-150 keV) in 1 sec: 0.204764 ( -0.204764 0.13776 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26365e-08 ( -1.31867e-08 1.33216e-08 ) ergs/cm2
Band function
Time interval is from 404.104 sec. to 405.104 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.859114 ( 0.859419 0.859419 )
beta : -0.545368 ( 0.545095 0.545095 )
Epeak [keV] : 10.6857 ( -10.6805 -10.6805 )
Norm@50keV : 2.91823E-03 ( -0.00291928 442782 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.682701e-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] : 41.0201 (-41.418 -41.418)
R^2/D10^2 : 1.39718E-03 (-0.00137848 0.0115691)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 0.9687 for 57 degrees of freedom
# Null hypothesis probability = 5.423559e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.525e-09 2.015e-09
25- 50 2.028e-09 1.766e-09
50-150 1.231e-10 1.727e-10
15-150 4.677e-09 3.961e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 0.886175 (-0.566825 0.566848)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 0.9993 for 57 degrees of freedom
# Null hypothesis probability = 4.766502e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.207e-09 1.572e-09
25- 50 4.245e-09 3.177e-09
50-150 9.310e-09 6.605e-09
15-150 1.576e-08 1.103e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.48804 (-3.49191 128.578)
R1^2/D10^2 : 5.09173 (-5.07549 -5.07549)
kT2 [keV] : 47.1028 (-26.7991 -47.1137)
R2^2/D10^2 : 9.66065E-04 (-0.000929634 0.00669641)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.66 using 59 PHA bins.
# Reduced chi-squared = 0.9757 for 55 degrees of freedom
# Null hypothesis probability = 5.258671e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.535e-09 1.517e-09
25- 50 2.295e-09 1.228e-09
50-150 2.009e-08 1.140e-08
15-150 2.492e-08 1.476e-08
Plot creation:
Wed May 17 06:13:27 EDT 2017