batgrbproduct analysis for trigger=785510
batgrbproduct Analysis for Trigger=785510
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): Fri Nov 3 17:27:46 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger785510/GCN5_download_cron
======================================================================
Trigger: 00785510 Segment: 000
BAT Trigger Time: 531328849.536 [s; MET]
Trigger Stop: 531328857.728 [s; MET]
UTC: 2017-11-02T15:20:29.598440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.103089791342 Dec: 22.4378985024187 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.05
Image Trigger?: NO
Rate S/N Ratio: 9.32737905308882 [ if not an image trigger ]
Image S/N Ratio: 7.05
Flight Position: [ source = BAT ]
RA: 288.103089791342 Dec: 22.4378985024187 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 288.095656067962 Dec: 22.4342141875967 [deg; J2000]
{ 19h 12m 23.0s , +22d 26' 03.2" }
+/- 2.10618011505039 [arcmin] (estimated 90% radius based on SNR)
+/- 1.15783977617666 [arcmin] (formal 1-sigma fit error)
SNR: 10.4949878403662
Angular difference between Flight and Ground position is 0.467790 arcmin
Partial Coding Fraction: 0.2226562 [ including projection effects ]
Duration
T90: 17.7519999742508 +/- 3.14248560269926
Measured from: -5.04799991846085
to: 12.7040000557899 [s; relative to TRIGTIME]
T50: 9.45599991083145 +/- 3.62186304154062
Measured from: -1.22799986600876
to: 8.22800004482269 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.50800001621246
to: 4.50800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.18400001525879
to: 13.7159999608994 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.233256 0.395492 0.468571 0.085780
0.063593 0.063546 0.055765 0.050322 [error]
Peak 0.027825 0.054346 0.048486 0.029463
0.015221 0.014895 0.013593 0.012541 [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 8.41e-08 1.91e-07 3.42e-07 1.45e-06 9.32e-07 2.07e-06 erg/cm2
Error 2.39e-08 3.27e-08 5.34e-08 5.15e-07 1.38e-07 5.41e-07 erg/cm2
Peak flux Power-law 3.81e-01 3.90e-01 2.81e-01 3.23e-01 1.18e+00 1.37e+00 ph/cm2/s
Error 2.11e-01 1.33e-01 1.08e-01 2.68e-01 3.76e-01 4.27e-01 ph/cm2/s
Fluence Cutoff-PL 6.59e-08 2.02e-07 3.73e-07 4.92e-07 8.82e-07 1.13e-06 erg/cm2
Error 3.02e-08 3.81e-08 6.57e-08 7.48e-07 1.53e-07 7.49e-07 erg/cm2
Peak flux Cutoff-PL 3.46e-01 4.04e-01 2.92e-01 1.95e-01 1.15e+00 1.24e+00 ph/cm2/s
Error 2.53e-01 1.51e-01 1.22e-01 3.23e-01 4.02e-01 5.16e-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 1.157 0.244 - - 4.56e-03 6.47e-04 67.690 57
CPL 0.170 1.285 104.1 -35.6 1.26e-02 2.73e-02 65.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.474 0.570 - - 9.50e-03 2.97e-03 46.880 57
CPL 0.999 2.318 108.5 0.0 1.62e-02 0.00e+00 46.730 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: 18.432000 sec.
T50 in the 50-300 keV band: 8.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 19.900 -6.184 13.716
T90 17.752 -5.048 12.704
T50 9.456 -1.228 8.228
Peak 1.000 3.508 4.508
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
288.0957 +22.4342 0.0183 37.0 59.3 1.3387 10.5 TRIG_00785510
------------------------------------------
Foreground time interval of the image:
-6.184 13.716 (delta_t = 19.900 [sec])
Background time interval of the image:
-182.235 -93.916 (delta_t = 88.319 [sec])
-92.536 -6.184 (delta_t = 86.352 [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 -6.184 sec. to 13.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15708 ( -0.249102 0.239614 )
Norm@50keV : 4.55805E-03 ( -0.000647823 0.000645532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.69 using 59 PHA bins.
# Reduced chi-squared = 1.188 for 57 degrees of freedom
# Null hypothesis probability = 1.571277e-01
Photon flux (15-150 keV) in 19.9 sec: 0.532018 ( -0.0791878 0.0798001 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.31782e-07 ( -1.37683e-07 1.38564e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.184 sec. to 13.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.169940 ( -1.50684 1.06351 )
Epeak [keV] : 104.065 ( -32.7639 -104.064 )
Norm@50keV : 1.26393E-02 ( -0.0126394 0.0419661 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.37 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 56 degrees of freedom
# Null hypothesis probability = 1.834058e-01
Photon flux (15-150 keV) in 19.9 sec: 0.505996 ( -0.085336 0.08517 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.81898e-07 ( -1.53487e-07 1.51919e-07 ) ergs/cm2
Band function
Time interval is from -6.184 sec. to 13.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.70847E-02 ( -0.179666 3.37109 )
beta : -1.97771 ( 1.69166 1.94492 )
Epeak [keV] : 97.2793 ( -81.1659 110.474 )
Norm@50keV : 1.36288E-02 ( -0.0175382 44.3449 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.38 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 55 degrees of freedom
# Null hypothesis probability = 1.596546e-01
Photon flux (15-150 keV) in 19.9 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] : 19.5496 (-2.99457 3.85429)
R^2/D10^2 : 2.70307E-02 (-0.0122111 0.0204001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.37 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.438635e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.998e-08 1.238e-08
25- 50 1.961e-07 4.787e-08
50-150 5.538e-07 1.540e-07
15-150 7.899e-07 1.532e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-41.8051 -200)
Norm : 2.26228 (-0.324514 0.324514)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.23 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.229351e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.122e-07 6.288e-08
25- 50 2.158e-07 1.216e-07
50-150 4.733e-07 2.627e-07
15-150 8.012e-07 4.472e-07
Double BB
R1^2/D10^2 : 4.88389E-05 (-2.98778e-05 0.0267397)
kT2 [keV] : 15.6989 (-15.6985 4.8131)
R2^2/D10^2 : 4.74474E-02 (-0.025706 12.6992)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.61 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.54 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Reduced chi-squared = 1.192 for 55 degrees of freedom
# Null hypothesis probability = 1.525221e-01
# Null hypothesis probability = 1.549346e-01
# Null hypothesis probability = 1.562519e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.121e-08 3.540e-08
25- 50 1.903e-07 9.053e-08
50-150 5.899e-07 2.449e-07
15-150 8.514e-07 3.835e-07
Peak spectrum fit
Power-law model
Time interval is from 3.508 sec. to 4.508 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47414 ( -0.570058 0.569499 )
Norm@50keV : 9.50067E-03 ( -0.00298579 0.00294984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.88 using 59 PHA bins.
# Reduced chi-squared = 0.8224 for 57 degrees of freedom
# Null hypothesis probability = 8.282711e-01
Photon flux (15-150 keV) in 1 sec: 1.17801 ( -0.373967 0.377368 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.05223e-08 ( -3.02982e-08 3.11615e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.508 sec. to 4.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999402 ( -3.49284 1.14254 )
Epeak [keV] : 108.540 ( -108.246 -108.246 )
Norm@50keV : 1.62313E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.73 using 59 PHA bins.
# Reduced chi-squared = 0.8345 for 56 degrees of freedom
# Null hypothesis probability = 8.066094e-01
Photon flux (15-150 keV) in 1 sec: 1.14833 ( -0.407172 0.39622 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.74748e-08 ( -3.27167e-08 3.33592e-08 ) ergs/cm2
Band function
Time interval is from 3.508 sec. to 4.508 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10367 ( 1.1041 1.50704 )
beta : -2.43402 ( 2.1795 9.60108 )
Epeak [keV] : 130.641 ( -130.134 -130.134 )
Norm@50keV : 1.42352E-02 ( -0.00735141 0.0211312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.74 using 59 PHA bins.
# Reduced chi-squared = 0.8499 for 55 degrees of freedom
# Null hypothesis probability = 7.782194e-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] : 16.3295 (-5.1923 8.68214)
R^2/D10^2 : 9.87905E-02 (-0.0987905 0.284137)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.39 using 59 PHA bins.
# Reduced chi-squared = 0.8490 for 57 degrees of freedom
# Null hypothesis probability = 7.844911e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.421e-09 3.568e-09
25- 50 2.321e-08 1.373e-08
50-150 4.359e-08 2.917e-08
15-150 7.222e-08 4.596e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 4.84728 (-1.48655 1.89223)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.83 using 59 PHA bins.
# Reduced chi-squared = 0.8216 for 57 degrees of freedom
# Null hypothesis probability = 8.295395e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.207e-08 7.570e-09
25- 50 2.322e-08 1.424e-08
50-150 5.092e-08 3.087e-08
15-150 8.621e-08 5.300e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.39116 (-4.39116 94.1427)
R1^2/D10^2 : 6.14832 (-6.14832 -6.14832)
kT2 [keV] : 20.2558 (-7.46852 -20.2558)
R2^2/D10^2 : 4.25158E-02 (-0.0425158 0.182928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.30 using 59 PHA bins.
# Reduced chi-squared = 0.8418 for 55 degrees of freedom
# Null hypothesis probability = 7.919454e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-08 7.345e-09
25- 50 2.084e-08 1.101e-08
50-150 5.129e-08 3.129e-08
15-150 8.410e-08 4.608e-08
Plot creation:
Fri Nov 3 17:56:00 EDT 2017