batgrbproduct analysis for trigger=755354
batgrbproduct Analysis for Trigger=755354
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): Thu Jun 1 11:46:46 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger755354/GCN5_download_cron
======================================================================
Trigger: 00755354 Segment: 000
BAT Trigger Time: 517960948.352 [s; MET]
Trigger Stop: 517960960.512 [s; MET]
UTC: 2017-05-31T22:02:09.205660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 286.89460992882 Dec: -16.426493667783 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.47
Image Trigger?: NO
Rate S/N Ratio: 10.0498756211209 [ if not an image trigger ]
Image S/N Ratio: 9.47
Flight Position: [ source = BAT ]
RA: 286.89460992882 Dec: -16.426493667783 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 286.901085723437 Dec: -16.4143380890687 [deg; J2000]
{ 19h 07m 36.3s , -16d 24' 51.6" }
+/- 1.53306276520638 [arcmin] (estimated 90% radius based on SNR)
+/- 0.658338187028736 [arcmin] (formal 1-sigma fit error)
SNR: 16.5208640559914
Angular difference between Flight and Ground position is 0.819045 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 164.131999969482 +/- 8.82050386393155
Measured from: 4.48800009489059
to: 168.620000064373 [s; relative to TRIGTIME]
T50: 122.815999984741 +/- 11.0369244100889
Measured from: 35.3760001063347
to: 158.192000091076 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 42.7080000042915
to: 43.7080000042915 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.551999986171722
to: 181.667999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.352572 1.478417 0.776169 -0.045715
0.098162 0.093027 0.082291 0.083374 [error]
Peak 0.036408 0.036579 0.018598 0.009056
0.007997 0.007323 0.006297 0.006405 [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 4.26e-07 5.97e-07 6.19e-07 1.18e-06 2.01e-06 2.82e-06 erg/cm2
Error 4.70e-08 4.44e-08 7.85e-08 3.00e-07 1.79e-07 3.81e-07 erg/cm2
Peak flux Power-law 2.97e-01 2.53e-01 1.47e-01 1.27e-01 7.52e-01 8.24e-01 ph/cm2/s
Error 1.09e-01 5.95e-02 5.31e-02 9.43e-02 1.77e-01 1.96e-01 ph/cm2/s
Fluence Cutoff-PL 3.97e-07 6.47e-07 5.89e-07 3.37e-07 1.85e-06 1.97e-06 erg/cm2
Error 5.26e-08 5.92e-08 9.33e-08 3.49e-07 2.09e-07 4.16e-07 erg/cm2
Peak flux Cutoff-PL 2.97e-01 2.53e-01 1.47e-01 1.26e-01 7.52e-01 8.23e-01 ph/cm2/s
Error 1.11e-01 6.20e-02 5.33e-02 1.30e-01 1.78e-01 2.20e-01 ph/cm2/s
Fluence Band 3.94e-07 6.44e-07 5.90e-07 3.58e-07 1.85e-06 1.99e-06 erg/cm2
Error 5.08e-08 5.88e-08 9.10e-08 -------- 2.07e-07 -------- 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 1.946 0.143 - - 1.21e-03 1.10e-04 45.290 57
CPL 1.187 0.630 44.2 14.5 3.31e-03 3.30e-03 40.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.784 0.454 - - 5.49e-03 1.51e-03 54.620 57
CPL 1.608 1.549 90.3 0.0 6.99e-03 0.00e+00 54.690 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: 166.656000 sec.
T50 in the 50-300 keV band: 138.432000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 181.116 0.552 181.668
T90 164.132 4.488 168.620
T50 122.816 35.376 158.192
Peak 1.000 42.708 43.708
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
286.9011 -16.4143 0.0116 20.4 -150.3 2.0427 16.5 TRIG_00755354
------------------------------------------
Foreground time interval of the image:
0.552 60.549 (delta_t = 59.997 [sec])
Background time interval of the image:
-239.352 0.552 (delta_t = 239.904 [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 0.552 sec. to 181.668 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.94633 ( -0.140733 0.144897 )
Norm@50keV : 1.20882E-03 ( -0.00011123 0.00010974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.29 using 59 PHA bins.
# Reduced chi-squared = 0.7945 for 57 degrees of freedom
# Null hypothesis probability = 8.684827e-01
Photon flux (15-150 keV) in 181.1 sec: 0.176992 ( -0.0132621 0.0132698 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.01439e-06 ( -1.77706e-07 1.80893e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.552 sec. to 181.668 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18731 ( -0.67907 0.580971 )
Epeak [keV] : 44.2177 ( -9.92227 19.0029 )
Norm@50keV : 3.30888E-03 ( -0.00174988 0.00484456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.07 using 59 PHA bins.
# Reduced chi-squared = 0.7156 for 56 degrees of freedom
# Null hypothesis probability = 9.466097e-01
Photon flux (15-150 keV) in 181.1 sec: 0.170549 ( -0.013993 0.014033 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.84505e-06 ( -2.0258e-07 2.14929e-07 ) ergs/cm2
Band function
Time interval is from 0.552 sec. to 181.668 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18703 ( -0.583656 0.685557 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 44.2085 ( -9.90962 19.003 )
Norm@50keV : 3.30976E-03 ( -0.00187573 0.00485636 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.07 using 59 PHA bins.
# Reduced chi-squared = 0.7286 for 55 degrees of freedom
# Null hypothesis probability = 9.347709e-01
Photon flux (15-150 keV) in 181.1 sec: 0.171575 ( 6.82843 -0.01514 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.847e-06 ( -1.84573e-06 -2.06871e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.0789 (-0.906249 1.01373)
R^2/D10^2 : 7.85530E-02 (-0.0242395 0.0346536)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.81 using 59 PHA bins.
# Reduced chi-squared = 1.207 for 57 degrees of freedom
# Null hypothesis probability = 1.359126e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.951e-07 3.930e-08
25- 50 7.419e-07 6.737e-08
50-150 3.961e-07 8.774e-08
15-150 1.433e-06 1.353e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 70.1357 (-15.171 22.5638)
Norm : 0.866203 (-0.10276 0.120795)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.14 using 59 PHA bins.
# Reduced chi-squared = 0.7041 for 57 degrees of freedom
# Null hypothesis probability = 9.559201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.025e-07 4.147e-08
25- 50 6.408e-07 5.170e-08
50-150 8.242e-07 1.596e-07
15-150 1.868e-06 1.978e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.89253 (-1.10317 1.22759)
R1^2/D10^2 : 0.415272 (-0.19917 0.464231)
kT2 [keV] : 18.6328 (-3.79965 6.35024)
R2^2/D10^2 : 5.28600E-03 (-0.00364239 0.00838115)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.41 using 59 PHA bins.
# Reduced chi-squared = 0.6619 for 55 degrees of freedom
# Null hypothesis probability = 9.749459e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.037e-07 1.234e-07
25- 50 6.359e-07 2.094e-07
50-150 8.204e-07 4.383e-07
15-150 1.860e-06 6.669e-07
Peak spectrum fit
Power-law model
Time interval is from 42.708 sec. to 43.708 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78423 ( -0.443591 0.46435 )
Norm@50keV : 5.49275E-03 ( -0.00153851 0.00147386 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.62 using 59 PHA bins.
# Reduced chi-squared = 0.9583 for 57 degrees of freedom
# Null hypothesis probability = 5.648060e-01
Photon flux (15-150 keV) in 1 sec: 0.752312 ( -0.177004 0.177249 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.05974e-08 ( -1.39089e-08 1.4655e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 42.708 sec. to 43.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60776 ( -2.39445 0.702988 )
Epeak [keV] : 90.2562 ( )
Norm@50keV : 6.98821E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9765 for 56 degrees of freedom
# Null hypothesis probability = 5.246990e-01
Photon flux (15-150 keV) in 1 sec: 0.752036 ( -0.17967 0.177127 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08273e-08 ( -1.72764e-08 1.42028e-08 ) ergs/cm2
Band function
Time interval is from 42.708 sec. to 43.708 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95671 ( -4.95671 -4.95671 )
beta : -2.09808 ( -1.02245 0.593906 )
Epeak [keV] : 25.9603 ( -25.9603 7.49159 )
Norm@50keV : 587.090 ( -135.225 6.0605e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9656 for 55 degrees of freedom
# Null hypothesis probability = 5.472438e-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] : 9.47032 (-2.35453 3.61039)
R^2/D10^2 : 0.428461 (-0.304224 0.875248)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.53 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.191849e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.664e-09 3.465e-09
25- 50 1.761e-08 8.718e-09
50-150 7.833e-09 5.130e-09
15-150 3.310e-08 2.009e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 95.4238 (-55.0154 -95.4297)
Norm : 3.34464 (-0.971287 1.67113)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.88 using 59 PHA bins.
# Reduced chi-squared = 0.9629 for 57 degrees of freedom
# Null hypothesis probability = 5.548611e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.738e-09 5.335e-09
25- 50 1.497e-08 9.140e-09
50-150 2.360e-08 1.858e-08
15-150 4.731e-08 3.110e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.41973 (-2.56514 2.8672)
R1^2/D10^2 : 0.962943 (-0.666745 3.32039)
kT2 [keV] : 71.3248 (-64.1403 -80.4718)
R2^2/D10^2 : 5.39095E-04 (-0.000382053 0.0371746)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.32 using 59 PHA bins.
# Reduced chi-squared = 0.9512 for 55 degrees of freedom
# Null hypothesis probability = 5.777321e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.235e-09 5.415e-09
25- 50 1.551e-08 9.145e-09
50-150 3.102e-08 1.871e-08
15-150 5.576e-08 2.670e-08
Plot creation:
Thu Jun 1 12:02:33 EDT 2017