batgrbproduct analysis for trigger=835200
batgrbproduct Analysis for Trigger=835200
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): Sun Jun 3 13:25:18 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger835200/GCN5_download_cron
======================================================================
Trigger: 00835200 Segment: 000
BAT Trigger Time: 549620112 [s; MET]
Trigger Stop: 549620176 [s; MET]
UTC: 2018-06-02T08:14:50.959800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 142.33930428647 Dec: 32.0927735904 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.3
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.3
Flight Position: [ source = BAT ]
RA: 142.33930428647 Dec: 32.0927735904 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 142.343145130267 Dec: 32.0800363469667 [deg; J2000]
{ 09h 29m 22.4s , +32d 04' 48.1" }
+/- 1.47379007208158 [arcmin] (estimated 90% radius based on SNR)
+/- 0.57603369570539 [arcmin] (formal 1-sigma fit error)
SNR: 17.4781739052826
Angular difference between Flight and Ground position is 0.788782 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 45.4399999380112 +/- 7.05970077833043
Measured from: -27.2119998931885
to: 18.2280000448227 [s; relative to TRIGTIME]
T50: 14.7960000038147 +/- 2.79151639589376
Measured from: -19.5639998912811
to: -4.76799988746643 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -20.12399995327
to: -19.12399995327 [s; relative to TRIGTIME]
Total Fluence
Measured from: -29.3159999847412
to: 25.7319999933243 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.829484 1.108515 0.619121 0.130695
0.052390 0.054881 0.048252 0.042482 [error]
Peak 0.026681 0.046901 0.039058 0.006827
0.007407 0.007778 0.006928 0.005651 [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 2.64e-07 4.25e-07 5.18e-07 1.24e-06 1.56e-06 2.45e-06 erg/cm2
Error 2.58e-08 2.61e-08 4.77e-08 2.38e-07 1.11e-07 2.80e-07 erg/cm2
Peak flux Power-law 3.00e-01 3.08e-01 2.23e-01 2.59e-01 9.32e-01 1.09e+00 ph/cm2/s
Error 9.04e-02 6.07e-02 5.36e-02 1.23e-01 1.77e-01 2.12e-01 ph/cm2/s
Fluence Cutoff-PL 2.50e-07 4.46e-07 5.18e-07 6.04e-07 1.49e-06 1.82e-06 erg/cm2
Error 2.97e-08 3.42e-08 5.12e-08 4.59e-07 1.33e-07 4.82e-07 erg/cm2
Peak flux Cutoff-PL 2.38e-01 3.51e-01 2.43e-01 7.20e-02 8.88e-01 9.04e-01 ph/cm2/s
Error 1.07e-01 7.76e-02 6.49e-02 -------- 1.82e-01 2.08e-01 ph/cm2/s
Fluence Band 2.35e-07 4.62e-07 4.96e-07 9.61e-07 1.50e-06 2.16e-06 erg/cm2
Error -------- -------- 5.20e-08 -------- 1.20e-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 1.715 0.113 - - 3.07e-03 2.06e-04 48.160 57
CPL 1.280 0.485 75.1 -27.5 5.28e-03 3.47e-03 45.500 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.466 0.306 - - 7.53e-03 1.47e-03 54.330 57
CPL 0.065 1.573 67.1 114.8 3.97e-02 1.61e-01 51.030 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: 21.184000 sec.
T50 in the 50-300 keV band: 12.480000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 55.048 -29.316 25.732
T90 45.440 -27.212 18.228
T50 14.796 -19.564 -4.768
Peak 1.000 -20.124 -19.124
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
142.3431 +32.0800 0.0110 19.7 128.2 1.7356 17.5 TRIG_00835200
------------------------------------------
Foreground time interval of the image:
-16.899 25.732 (delta_t = 42.631 [sec])
Background time interval of the image:
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 -29.316 sec. to 25.732 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71522 ( -0.111776 0.113708 )
Norm@50keV : 3.06505E-03 ( -0.000207352 0.00020546 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.16 using 59 PHA bins.
# Reduced chi-squared = 0.8449 for 57 degrees of freedom
# Null hypothesis probability = 7.916064e-01
Photon flux (15-150 keV) in 55.05 sec: 0.409262 ( -0.0252223 0.0252425 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56044e-06 ( -1.10524e-07 1.11684e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -29.316 sec. to 25.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28009 ( -0.515415 0.453881 )
Epeak [keV] : 75.0780 ( -20.0278 -75.0798 )
Norm@50keV : 5.27616E-03 ( -0.00223971 0.00470747 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.50 using 59 PHA bins.
# Reduced chi-squared = 0.8125 for 56 degrees of freedom
# Null hypothesis probability = 8.407690e-01
Photon flux (15-150 keV) in 55.05 sec: 0.400174 ( -0.026921 0.026867 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49016e-06 ( -1.3256e-07 1.33304e-07 ) ergs/cm2
Band function
Time interval is from -29.316 sec. to 25.732 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.417888 ( -1.077 0.333024 )
beta : -1.92890 ( -0.463778 0.213446 )
Epeak [keV] : 36.2169 ( -9.86068 34.4968 )
Norm@50keV : 7.57617E-02 ( -0.0744942 88.0754 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.46 using 59 PHA bins.
# Reduced chi-squared = 0.7719 for 55 degrees of freedom
# Null hypothesis probability = 8.918397e-01
Photon flux (15-150 keV) in 55.05 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.4984e-06 ( -1.49802e-06 -1.19145e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.7979 (-0.869314 0.9601)
R^2/D10^2 : 0.104135 (-0.0261553 0.0341641)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.01 using 59 PHA bins.
# Reduced chi-squared = 1.614 for 57 degrees of freedom
# Null hypothesis probability = 2.273994e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.685e-07 1.594e-08
25- 50 5.197e-07 3.628e-08
50-150 4.300e-07 6.504e-08
15-150 1.118e-06 8.450e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 120.129 (-28.1603 44.1849)
Norm : 1.73808 (-0.135473 0.156574)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.38 using 59 PHA bins.
# Reduced chi-squared = 0.7962 for 57 degrees of freedom
# Null hypothesis probability = 8.662457e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.492e-07 2.323e-08
25- 50 4.459e-07 3.870e-08
50-150 7.962e-07 2.628e-07
15-150 1.491e-06 2.937e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.83639 (-1.26839 1.26306)
R1^2/D10^2 : 0.349079 (-0.131118 0.259194)
kT2 [keV] : 29.5679 (-7.95688 18.2263)
R2^2/D10^2 : 2.53548E-03 (-0.00195613 0.0055148)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.36 using 59 PHA bins.
# Reduced chi-squared = 0.7702 for 55 degrees of freedom
# Null hypothesis probability = 8.938592e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.293e-07 4.354e-08
25- 50 4.727e-07 9.103e-08
50-150 8.204e-07 3.768e-07
15-150 1.522e-06 4.495e-07
Peak spectrum fit
Power-law model
Time interval is from -20.124 sec. to -19.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46619 ( -0.302566 0.30934 )
Norm@50keV : 7.53036E-03 ( -0.00147597 0.00146171 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.33 using 59 PHA bins.
# Reduced chi-squared = 0.9532 for 57 degrees of freedom
# Null hypothesis probability = 5.757120e-01
Photon flux (15-150 keV) in 1 sec: 0.931792 ( -0.176521 0.176746 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18514e-08 ( -1.5265e-08 1.56093e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.124 sec. to -19.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.51774E-02 ( -1.82367 1.32264 )
Epeak [keV] : 67.0537 ( -17.7906 211.711 )
Norm@50keV : 3.96837E-02 ( -0.0396837 0.281772 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9112 for 56 degrees of freedom
# Null hypothesis probability = 6.632031e-01
Photon flux (15-150 keV) in 1 sec: 0.887815 ( -0.181328 0.181785 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.52414e-08 ( -1.55232e-08 1.66978e-08 ) ergs/cm2
Band function
Time interval is from -20.124 sec. to -19.124 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.105283 ( -1.2756 1.43553 )
beta : -9.37154 ( 9.37166 19.3717 )
Epeak [keV] : 68.0344 ( -17.8397 160.498 )
Norm@50keV : 3.75910E-02 ( -0.037599 4.20527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.03 using 59 PHA bins.
# Reduced chi-squared = 0.9278 for 55 degrees of freedom
# Null hypothesis probability = 6.270788e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.521e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9765 (-2.90935 3.6415)
R^2/D10^2 : 0.112551 (-0.0601612 0.126547)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.06 using 59 PHA bins.
# Reduced chi-squared = 0.9309 for 57 degrees of freedom
# Null hypothesis probability = 6.236225e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.287e-09 1.993e-09
25- 50 2.098e-08 6.780e-09
50-150 3.200e-08 1.213e-08
15-150 5.826e-08 1.717e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-105.849 -199.363)
Norm : 3.85153 (-0.718179 0.718786)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.19 using 59 PHA bins.
# Reduced chi-squared = 0.9331 for 57 degrees of freedom
# Null hypothesis probability = 6.188293e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.591e-09 5.635e-09
25- 50 1.845e-08 1.086e-08
50-150 4.046e-08 2.310e-08
15-150 6.850e-08 3.875e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.30605 (-6.3276 -6.3276)
R1^2/D10^2 : 0.869913 (-0.865123 -0.865123)
kT2 [keV] : 18.8454 (-5.29385 -18.8591)
R2^2/D10^2 : 4.24362E-02 (-0.0423072 0.110986)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.55 using 59 PHA bins.
# Reduced chi-squared = 0.9190 for 55 degrees of freedom
# Null hypothesis probability = 6.452741e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.891e-09 4.566e-09
25- 50 1.967e-08 1.006e-08
50-150 3.763e-08 2.266e-08
15-150 6.519e-08 3.420e-08
Plot creation:
Sun Jun 3 13:29:45 EDT 2018