batgrbproduct analysis for trigger=736432
batgrbproduct Analysis for Trigger=736432
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): Sat Feb 4 08:53:22 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger736432/GCN5_download_cron
======================================================================
Trigger: 00736432 Segment: 000
BAT Trigger Time: 507773039.616 [s; MET]
Trigger Stop: 507773043.712 [s; MET]
UTC: 2017-02-03T00:03:41.060220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.860488803399 Dec: 25.1734109087689 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.81
Image Trigger?: NO
Rate S/N Ratio: 11.4891252930761 [ if not an image trigger ]
Image S/N Ratio: 7.81
Flight Position: [ source = BAT ]
RA: 332.860488803399 Dec: 25.1734109087689 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 332.860873048044 Dec: 25.1856768918587 [deg; J2000]
{ 22h 11m 26.6s , +25d 11' 08.4" }
+/- 2.22235749559914 [arcmin] (estimated 90% radius based on SNR)
+/- 1.02929549488502 [arcmin] (formal 1-sigma fit error)
SNR: 9.72008179715165
Angular difference between Flight and Ground position is 0.736255 arcmin
Partial Coding Fraction: 0.671875 [ including projection effects ]
Duration
T90: 45.1679999828339 +/- 6.43331458309202
Measured from: 0.728000104427338
to: 45.8960000872612 [s; relative to TRIGTIME]
T50: 22.4839999675751 +/- 13.354025606316
Measured from: 3.81200009584427
to: 26.2960000634193 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.7039999961853
to: 4.7039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0400000214576721
to: 48.4319999814034 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.296486 0.338049 0.247799 0.073961
0.048775 0.050906 0.044376 0.038928 [error]
Peak 0.023237 0.040570 0.025992 0.004206
0.007326 0.007791 0.006878 0.005710 [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 8.67e-08 1.56e-07 2.16e-07 6.21e-07 6.22e-07 1.08e-06 erg/cm2
Error 2.34e-08 2.49e-08 4.45e-08 2.85e-07 1.06e-07 3.16e-07 erg/cm2
Peak flux Power-law 3.27e-01 2.71e-01 1.53e-01 1.27e-01 8.07e-01 8.78e-01 ph/cm2/s
Error 1.11e-01 6.44e-02 5.36e-02 8.54e-02 1.92e-01 2.11e-01 ph/cm2/s
Fluence Cutoff-PL 8.59e-08 1.56e-07 2.16e-07 6.26e-07 6.22e-07 1.09e-06 erg/cm2
Error 2.32e-08 2.44e-08 4.42e-08 3.24e-07 1.04e-07 3.59e-07 erg/cm2
Peak flux Cutoff-PL 2.93e-01 3.10e-01 1.54e-01 3.57e-02 7.84e-01 7.92e-01 ph/cm2/s
Error 1.24e-01 9.26e-02 7.21e-02 1.30e-01 1.95e-01 2.03e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.99e-01 3.01e-01 1.58e-01 5.09e-02 7.94e-01 8.10e-01 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 1.533 0.285 - - 1.36e-03 2.11e-04 51.990 57
CPL 1.541 0.381 9999.3 0.0 1.36e-03 7.46e-04 52.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.829 0.409 - - 5.79e-03 1.59e-03 55.460 57
CPL 0.712 2.377 49.5 0.0 2.50e-02 0.00e+00 54.200 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: 6.848000 sec.
T50 in the 50-300 keV band: 3.904000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 48.472 -0.040 48.432
T90 45.168 0.728 45.896
T50 22.484 3.812 26.296
Peak 1.000 3.704 4.704
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
332.8609 +25.1857 0.0197 38.6 -13.0 1.0618 9.7 TRIG_00736432
------------------------------------------
Foreground time interval of the image:
-0.040 48.432 (delta_t = 48.472 [sec])
Background time interval of the image:
-129.715 -0.040 (delta_t = 129.675 [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 -0.040 sec. to 48.432 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53264 ( -0.282297 0.288026 )
Norm@50keV : 1.35906E-03 ( -0.000212049 0.000209424 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9122 for 57 degrees of freedom
# Null hypothesis probability = 6.628616e-01
Photon flux (15-150 keV) in 48.47 sec: 0.171197 ( -0.0265363 0.0266559 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.2172e-07 ( -1.05205e-07 1.06317e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 48.432 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54109 ( -0.481887 0.279888 )
Epeak [keV] : 9999.31 ( -9999.36 -9999.36 )
Norm@50keV : 1.35517E-03 ( -0.000210438 0.00128188 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.01 using 59 PHA bins.
# Reduced chi-squared = 0.9287 for 56 degrees of freedom
# Null hypothesis probability = 6.266915e-01
Photon flux (15-150 keV) in 48.47 sec: 0.171822 ( -0.027398 0.02606 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.21686e-07 ( -1.04938e-07 1.0375e-07 ) ergs/cm2
Band function
Time interval is from -0.040 sec. to 48.432 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.28294 ( 1.28294 1.28294 )
beta : -1.53261 ( 1.53261 0.282252 )
Epeak [keV] : 18.1400 ( -18.14 -18.14 )
Norm@50keV : 2.92421E-03 ( -0.00176911 0.210255 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.99 using 59 PHA bins.
# Reduced chi-squared = 0.9454 for 55 degrees of freedom
# Null hypothesis probability = 5.901803e-01
Photon flux (15-150 keV) in 48.47 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] : 15.6428 (-3.70494 5.26245)
R^2/D10^2 : 1.58451E-02 (-0.0155954 0.0250604)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.05 using 59 PHA bins.
# Reduced chi-squared = 1.264 for 57 degrees of freedom
# Null hypothesis probability = 8.648098e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.904e-08 1.307e-08
25- 50 1.611e-07 4.748e-08
50-150 2.731e-07 8.560e-08
15-150 4.733e-07 1.158e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-89.2153 -199.363)
Norm : 0.695394 (-0.10476 0.10494)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.30 using 59 PHA bins.
# Reduced chi-squared = 0.9350 for 57 degrees of freedom
# Null hypothesis probability = 6.147837e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.393e-08 4.823e-08
25- 50 1.615e-07 9.112e-08
50-150 3.541e-07 1.985e-07
15-150 5.995e-07 3.361e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.42596 (-2.87836 2.91371)
R1^2/D10^2 : 0.279032 (-0.206447 3.23851)
kT2 [keV] : 33.3894 (-11.9646 37.3661)
R2^2/D10^2 : 1.06062E-03 (-0.00091283 0.00368193)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.86 using 59 PHA bins.
# Reduced chi-squared = 0.9429 for 55 degrees of freedom
# Null hypothesis probability = 5.952962e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.974e-08 5.264e-08
25- 50 1.477e-07 7.774e-08
50-150 4.149e-07 2.368e-07
15-150 6.523e-07 3.275e-07
Peak spectrum fit
Power-law model
Time interval is from 3.704 sec. to 4.704 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.82861 ( -0.38981 0.428985 )
Norm@50keV : 5.79213E-03 ( -0.00162114 0.00156372 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.46 using 59 PHA bins.
# Reduced chi-squared = 0.9729 for 57 degrees of freedom
# Null hypothesis probability = 5.331553e-01
Photon flux (15-150 keV) in 1 sec: 0.807164 ( -0.191726 0.191832 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.32792e-08 ( -1.45449e-08 1.50466e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.704 sec. to 4.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.712181 ( -3.29477 1.4596 )
Epeak [keV] : 49.4871 ( )
Norm@50keV : 2.50445E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.20 using 59 PHA bins.
# Reduced chi-squared = 0.9679 for 56 degrees of freedom
# Null hypothesis probability = 5.432569e-01
Photon flux (15-150 keV) in 1 sec: 0.784461 ( -0.19499 0.195022 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.8673e-08 ( -1.54806e-08 1.66558e-08 ) ergs/cm2
Band function
Time interval is from 3.704 sec. to 4.704 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.712300 ( -4.32457 2.08181 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 49.4790 ( -18.2628 527.036 )
Norm@50keV : 2.50405E-02 ( -0.0250405 2.64258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.20 using 59 PHA bins.
# Reduced chi-squared = 0.9855 for 55 degrees of freedom
# Null hypothesis probability = 5.051371e-01
Photon flux (15-150 keV) in 1 sec: 0.794150 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.97355e-08 ( -4.97285e-08 -1.49999e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.4920 (-2.37936 3.42998)
R^2/D10^2 : 0.332826 (-0.219107 0.543137)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.02 using 59 PHA bins.
# Reduced chi-squared = 0.9828 for 57 degrees of freedom
# Null hypothesis probability = 5.117702e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.571e-09 3.689e-09
25- 50 2.012e-08 7.911e-09
50-150 1.204e-08 7.455e-09
15-150 3.973e-08 1.777e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 87.4338 (-44.5914 -87.4338)
Norm : 3.75102 (-1.0298 1.56796)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.47 using 59 PHA bins.
# Reduced chi-squared = 0.9556 for 57 degrees of freedom
# Null hypothesis probability = 5.705570e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.778e-09 3.081e-09
25- 50 1.643e-08 8.509e-09
50-150 2.458e-08 1.924e-08
15-150 5.078e-08 3.091e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.69232 (-7.85988 3.84598)
R1^2/D10^2 : 0.780771 (-0.757302 -0.757302)
kT2 [keV] : 23.4808 (-24.8876 -24.8876)
R2^2/D10^2 : 8.46680E-03 (-0.00749858 0.405701)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.50 using 59 PHA bins.
# Reduced chi-squared = 0.9727 for 55 degrees of freedom
# Null hypothesis probability = 5.321428e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.939e-09 5.875e-09
25- 50 1.783e-08 1.047e-08
50-150 2.196e-08 1.432e-08
15-150 4.872e-08 2.812e-08
Plot creation:
Sat Feb 4 08:59:18 EST 2017