batgrbproduct analysis for trigger=735326
batgrbproduct Analysis for Trigger=735326
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 Jan 28 13:30:13 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger735326/GCN5_download_cron
======================================================================
Trigger: 00735326 Segment: 000
BAT Trigger Time: 507219694.208 [s; MET]
Trigger Stop: 507219706.368 [s; MET]
UTC: 2017-01-27T14:21:15.684000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 174.335826083407 Dec: -45.8518164749582 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.67
Image Trigger?: NO
Rate S/N Ratio: 10.6770782520313 [ if not an image trigger ]
Image S/N Ratio: 7.67
Flight Position: [ source = BAT ]
RA: 174.335826083407 Dec: -45.8518164749582 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 174.381729894253 Dec: -45.8273945010038 [deg; J2000]
{ 11h 37m 31.6s , -45d 49' 38.6" }
+/- 2.36734446440263 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06545774416195 [arcmin] (formal 1-sigma fit error)
SNR: 8.88094454406925
Angular difference between Flight and Ground position is 2.414312 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 62.2639999389648 +/- 10.3934325994524
Measured from: -0.303999900817871
to: 61.960000038147 [s; relative to TRIGTIME]
T50: 35.5799999833107 +/- 10.0633107606977
Measured from: 7.72400009632111
to: 43.3040000796318 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.30799996852875
to: 8.30799996852875 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.64800000190735
to: 64.5120000243187 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.149418 0.293292 0.238597 0.105921
0.046546 0.047187 0.040995 0.037164 [error]
Peak 0.018030 0.013463 0.011904 0.012987
0.005769 0.005751 0.005227 0.004484 [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 4.36e-08 1.03e-07 1.92e-07 8.66e-07 5.21e-07 1.20e-06 erg/cm2
Error 1.46e-08 2.09e-08 3.80e-08 3.90e-07 9.87e-08 4.12e-07 erg/cm2
Peak flux Power-law 8.22e-02 1.07e-01 1.02e-01 1.74e-01 3.50e-01 4.64e-01 ph/cm2/s
Error 9.04e-02 6.19e-02 4.78e-02 3.00e-01 2.41e-01 2.53e-01 ph/cm2/s
Fluence Cutoff-PL 3.54e-08 1.11e-07 2.06e-07 2.59e-07 4.84e-07 6.12e-07 erg/cm2
Error 1.76e-08 2.54e-08 4.47e-08 5.27e-07 1.11e-07 4.87e-07 erg/cm2
Peak flux Cutoff-PL 9.67e-02 1.14e-01 9.70e-02 1.38e-01 3.57e-01 4.46e-01 ph/cm2/s
Error 9.12e-02 6.59e-02 4.83e-02 3.22e-01 1.28e-01 2.58e-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 1.097 0.298 - - 7.20e-04 1.25e-04 67.340 57
CPL 0.100 1.460 101.5 -32.8 2.13e-03 6.97e-03 65.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.076 1.213 - - 3.03e-03 1.30e-03 48.140 57
CPL 1.101 1.234 10000.0 0.0 3.04e-03 0.00e+00 48.160 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: 17.664000 sec.
T50 in the 50-300 keV band: 9.216000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 69.160 -4.648 64.512
T90 62.264 -0.304 61.960
T50 35.580 7.724 43.304
Peak 1.000 7.308 8.308
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
174.3817 -45.8274 0.0218 8.5 104.7 0.7997 8.9 TRIG_00735326
------------------------------------------
Foreground time interval of the image:
-4.648 54.793 (delta_t = 59.441 [sec])
Background time interval of the image:
-183.107 -4.648 (delta_t = 178.459 [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 -4.648 sec. to 64.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09738 ( -0.305484 0.291512 )
Norm@50keV : 7.19745E-04 ( -0.000124735 0.000124571 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.34 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.642814e-01
Photon flux (15-150 keV) in 69.16 sec: 8.34651E-02 ( -0.0148098 0.0148725 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20865e-07 ( -9.79817e-08 9.9423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.648 sec. to 64.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.100303 ( -1.80156 1.11856 )
Epeak [keV] : 101.505 ( -35.8178 -101.505 )
Norm@50keV : 2.13257E-03 ( -0.00213255 0.0118159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.58 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.787395e-01
Photon flux (15-150 keV) in 69.16 sec: 7.97445E-02 ( -0.0157276 0.015668 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83989e-07 ( -1.10542e-07 1.11319e-07 ) ergs/cm2
Band function
Time interval is from -4.648 sec. to 64.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.934404 ( -0.757124 -0.757124 )
beta : -1.52824 ( 1.52749 0.581536 )
Epeak [keV] : 62.7226 ( -62.7065 170.954 )
Norm@50keV : 8.87049E-03 ( -0.00926192 3.01913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.17 using 59 PHA bins.
# Reduced chi-squared = 1.185 for 55 degrees of freedom
# Null hypothesis probability = 1.640363e-01
Photon flux (15-150 keV) in 69.16 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] : 18.9072 (-3.65332 5.02757)
R^2/D10^2 : 4.77521E-03 (-0.00256388 0.00497222)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.75 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.559139e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.325e-08 8.361e-09
25- 50 1.114e-07 3.658e-08
50-150 2.924e-07 9.375e-08
15-150 4.271e-07 1.476e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-54.879 -200)
Norm : 0.344270 (-0.0612775 0.0612775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.80 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 57 degrees of freedom
# Null hypothesis probability = 7.743596e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.932e-08 3.447e-08
25- 50 1.141e-07 6.532e-08
50-150 2.503e-07 1.423e-07
15-150 4.237e-07 2.427e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.0209 (-11.4849 8.61404)
R1^2/D10^2 : 1.32287E-02 (-0.0132424 -0.0132424)
kT2 [keV] : 38.3696 (-38.2998 -38.2998)
R2^2/D10^2 : 3.22980E-04 (-0.000325125 0.00546178)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.23 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Null hypothesis probability = 1.624010e-01
# Null hypothesis probability = 1.627695e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.284e-08 2.230e-08
25- 50 1.169e-07 7.251e-08
50-150 3.410e-07 1.822e-07
15-150 4.906e-07 2.504e-07
Peak spectrum fit
Power-law model
Time interval is from 7.308 sec. to 8.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07617 ( -1.36811 1.0577 )
Norm@50keV : 3.02524E-03 ( -0.00152666 0.00107125 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.14 using 59 PHA bins.
# Reduced chi-squared = 0.8446 for 57 degrees of freedom
# Null hypothesis probability = 7.921273e-01
Photon flux (15-150 keV) in 1 sec: 0.349597 ( -0.349529 0.132894 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.1943e-08 ( -1.4132e-08 1.36864e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.308 sec. to 8.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10083 ( -1.49793 0.970932 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 3.04232E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8601 for 56 degrees of freedom
# Null hypothesis probability = 7.624880e-01
Photon flux (15-150 keV) in 1 sec: 0.356872 ( -0.128518 0.127051 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.00507e-08 ( -1.25789e-08 1.58665e-08 ) ergs/cm2
Band function
Time interval is from 7.308 sec. to 8.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.932541 ( 0.931012 0.931012 )
beta : -1.07457 ( 1.06754 1.36163 )
Epeak [keV] : 35.1788 ( -33.6322 -33.6322 )
Norm@50keV : 4.88158E-03 ( -0.00287524 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.14 using 59 PHA bins.
# Reduced chi-squared = 0.8753 for 55 degrees of freedom
# Null hypothesis probability = 7.320813e-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] : 61.0407 (-59.1647 -61.798)
R^2/D10^2 : 8.16976E-04 (-0.00079083 0.00801995)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.65 using 59 PHA bins.
# Reduced chi-squared = 0.9062 for 57 degrees of freedom
# Null hypothesis probability = 6.752620e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.471e-09 3.436e-09
25- 50 2.935e-09 1.956e-09
50-150 8.074e-11 8.935e-11
15-150 8.487e-09 5.575e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.43491 (-0.525132 0.525131)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.94 using 59 PHA bins.
# Reduced chi-squared = 0.8761 for 57 degrees of freedom
# Null hypothesis probability = 7.348863e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.573e-09 2.318e-09
25- 50 6.873e-09 4.428e-09
50-150 1.507e-08 9.475e-09
15-150 2.552e-08 1.604e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.93358 (-1.59247 1.36157)
R1^2/D10^2 : 6.23040 (-6.10294 127.611)
kT2 [keV] : 199.691 (-199.691 -199.691)
R2^2/D10^2 : 1.11358E-04 (-4.56067e-05 0.00288173)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.87 using 59 PHA bins.
#Fit statistic : Chi-Squared = 40.83 using 59 PHA bins.
# Reduced chi-squared = 0.7431 for 55 degrees of freedom
# Reduced chi-squared = 0.7423 for 55 degrees of freedom
# Null hypothesis probability = 9.220210e-01
# Null hypothesis probability = 9.227261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.314e-09 3.454e-09
25- 50 3.227e-09 1.818e-09
50-150 2.991e-08 2.563e-08
15-150 3.845e-08 2.826e-08
Plot creation:
Sat Jan 28 13:37:12 EST 2017