batgrbproduct analysis for trigger=754322
batgrbproduct Analysis for Trigger=754322
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 May 25 20:59:50 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger754322/GCN5_download_cron
======================================================================
Trigger: 00754322 Segment: 000
BAT Trigger Time: 517348174.62 [s; MET]
Trigger Stop: 517348174.684 [s; MET]
UTC: 2017-05-24T19:49:15.509460 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 319.455997372106 Dec: 48.5875485410596 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.12
Image Trigger?: NO
Rate S/N Ratio: 24.8797106092495 [ if not an image trigger ]
Image S/N Ratio: 9.12
Flight Position: [ source = BAT ]
RA: 319.455997372106 Dec: 48.5875485410596 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 319.489058327499 Dec: 48.603946339763 [deg; J2000]
{ 21h 17m 57.4s , +48d 36' 14.2" }
+/- 2.04742036194731 [arcmin] (estimated 90% radius based on SNR)
+/- 1.01320598141339 [arcmin] (formal 1-sigma fit error)
SNR: 10.9279053690379
Angular difference between Flight and Ground position is 1.639862 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 0.1039999127388 +/- 0.0178885800721685
Measured from: 0.00400012731552124
to: 0.108000040054321 [s; relative to TRIGTIME]
T50: 0.059999942779541 +/- 0.0215406254038245
Measured from: 0.0120001435279846
to: 0.0720000863075256 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.438000023365021
to: 0.561999976634979 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.120000004768372 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.011249 0.017661 0.021115 0.004924
0.002479 0.002984 0.002905 0.001845 [error]
Peak 0.018719 0.020728 0.023746 0.007415
0.006202 0.006263 0.005627 0.004286 [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 3.04e-09 7.27e-09 1.39e-08 6.44e-08 3.75e-08 8.86e-08 erg/cm2
Error 8.27e-10 1.25e-09 2.36e-09 2.34e-08 6.17e-09 2.50e-08 erg/cm2
Peak flux Power-law 1.45e-01 1.65e-01 1.34e-01 1.81e-01 5.10e-01 6.24e-01 ph/cm2/s
Error 6.58e-02 4.83e-02 4.16e-02 1.13e-01 1.38e-01 1.72e-01 ph/cm2/s
Fluence Cutoff-PL 2.67e-09 7.72e-09 1.50e-08 3.10e-08 3.70e-08 5.64e-08 erg/cm2
Error 1.00e-09 1.49e-09 3.00e-09 2.92e-08 6.36e-09 2.20e-08 erg/cm2
Peak flux Cutoff-PL 1.03e-01 1.86e-01 1.54e-01 4.96e-02 4.82e-01 4.93e-01 ph/cm2/s
Error 8.00e-02 6.09e-02 5.39e-02 -------- 1.43e-01 1.86e-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 1.069 0.238 - - 2.96e-02 4.46e-03 47.680 57
CPL 0.455 0.955 142.2 -41.1 5.70e-02 7.84e-02 46.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.301 0.428 - - 4.27e-03 1.14e-03 57.480 57
CPL -0.354 2.621 74.1 -27.0 2.70e-02 3.90e-01 55.470 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.120 0.000 0.120
T90 0.104 0.004 0.108
T50 0.060 0.012 0.072
Peak 1.000 -0.438 0.562
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
319.4891 +48.6039 0.0176 11.0 -77.5 0.0549 10.9 TRIG_00754322
------------------------------------------
Foreground time interval of the image:
0.000 0.120 (delta_t = 0.120 [sec])
Background time interval of the image:
-239.620 0.000 (delta_t = 239.620 [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 0.000 sec. to 0.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06934 ( -0.240794 0.235112 )
Norm@50keV : 2.96094E-02 ( -0.00446562 0.00445779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.68 using 59 PHA bins.
# Reduced chi-squared = 0.8365 for 57 degrees of freedom
# Null hypothesis probability = 8.057392e-01
Photon flux (15-150 keV) in 0.12 sec: 3.42504 ( -0.524249 0.524787 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.75203e-08 ( -6.15942e-09 6.19044e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.455309 ( -1.18105 0.728136 )
Epeak [keV] : 142.221 ( -60.009 -142.221 )
Norm@50keV : 5.70151E-02 ( -0.0305095 0.126345 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.45 using 59 PHA bins.
# Reduced chi-squared = 0.8295 for 56 degrees of freedom
# Null hypothesis probability = 8.147212e-01
Photon flux (15-150 keV) in 0.12 sec: 3.39616 ( -0.5293 0.52837 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.70156e-08 ( -6.38412e-09 6.345e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.455631 ( -0.37034 1.04681 )
beta : -10.00000 ( 10 2.4869e-13 )
Epeak [keV] : 142.248 ( -45.8766 481.232 )
Norm@50keV : 5.69958E-02 ( -0.00851964 0.126438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.45 using 59 PHA bins.
# Reduced chi-squared = 0.8446 for 55 degrees of freedom
# Null hypothesis probability = 7.873340e-01
Photon flux (15-150 keV) in 0.12 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] : 21.0881 (-3.51855 4.45681)
R^2/D10^2 : 0.145301 (-0.0670917 0.115876)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.91 using 59 PHA bins.
# Reduced chi-squared = 0.9107 for 57 degrees of freedom
# Null hypothesis probability = 6.660201e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.462e-09 4.280e-10
25- 50 7.536e-09 1.915e-09
50-150 2.499e-08 6.468e-09
15-150 3.399e-08 7.368e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-39.0818 -200)
Norm : 13.7258 (-2.15624 2.15624)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.442175e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.101e-09 2.355e-09
25- 50 7.889e-09 4.530e-09
50-150 1.730e-08 9.822e-09
15-150 2.929e-08 1.666e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.84027 (-2.94335 72.6073)
R1^2/D10^2 : 3.74254 (-3.44577 19.9666)
kT2 [keV] : 25.9544 (-5.74165 29.6069)
R2^2/D10^2 : 6.73422E-02 (-0.0602221 0.0905911)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.99 using 59 PHA bins.
# Reduced chi-squared = 0.8362 for 55 degrees of freedom
# Null hypothesis probability = 8.013499e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.883e-09 1.616e-09
25- 50 7.195e-09 3.769e-09
50-150 2.674e-08 1.507e-08
15-150 3.682e-08 1.972e-08
Peak spectrum fit
Power-law model
Time interval is from -0.438 sec. to 0.562 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30097 ( -0.430804 0.426057 )
Norm@50keV : 4.26984E-03 ( -0.0011397 0.00113748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.48 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.572358e-01
Photon flux (15-150 keV) in 1 sec: 0.509504 ( -0.137565 0.13804 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.21821e-08 ( -1.22263e-08 1.24849e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.438 sec. to 0.562 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.354253 ( -3.42081 1.82079 )
Epeak [keV] : 74.1419 ( -20.0218 -74.096 )
Norm@50keV : 2.70128E-02 ( -0.0271404 0.753748 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 0.9905 for 56 degrees of freedom
# Null hypothesis probability = 4.950182e-01
Photon flux (15-150 keV) in 1 sec: 0.481935 ( -0.143415 0.143035 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.86609e-08 ( -1.21763e-08 1.31769e-08 ) ergs/cm2
Band function
Time interval is from -0.438 sec. to 0.562 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.337708 ( 0.314092 2.24883 )
beta : -10.00000 ( 10 3.39299e-08 )
Epeak [keV] : 73.9910 ( -21.756 -73.991 )
Norm@50keV : 2.67630E-02 ( -0.00692536 0.756292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 55 degrees of freedom
# Null hypothesis probability = 4.570150e-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] : 17.2024 (-4.16117 5.7609)
R^2/D10^2 : 4.04529E-02 (-0.0255673 0.0627307)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9797 for 57 degrees of freedom
# Null hypothesis probability = 5.185054e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.430e-09 1.281e-09
25- 50 1.085e-08 5.501e-09
50-150 2.302e-08 1.338e-08
15-150 3.630e-08 1.824e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.361 (-105.687 -199.363)
Norm : 2.12054 (-0.564618 0.565765)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.77 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.467591e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.280e-09 3.213e-09
25- 50 1.016e-08 6.210e-09
50-150 2.228e-08 1.368e-08
15-150 3.771e-08 2.271e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.02693 (-5.10504 -5.10504)
R1^2/D10^2 : 0.701637 (-0.689563 -0.689563)
kT2 [keV] : 19.0222 (-5.44948 -19.0322)
R2^2/D10^2 : 2.67466E-02 (-0.0266751 0.0635112)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.696912e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.645e-09 1.984e-09
25- 50 1.031e-08 5.905e-09
50-150 2.440e-08 1.529e-08
15-150 3.835e-08 2.209e-08
Plot creation:
Thu May 25 21:22:37 EDT 2017