batgrbproduct analysis for trigger=769567
batgrbproduct Analysis for Trigger=769567
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): Mon Aug 28 08:30:49 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger769567/GCN5_download_cron
======================================================================
Trigger: 00769567 Segment: 000
BAT Trigger Time: 525503568 [s; MET]
Trigger Stop: 525503632 [s; MET]
UTC: 2017-08-27T05:12:28.408920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.180423079966 Dec: -40.2199088737139 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.28
Flight Position: [ source = BAT ]
RA: 276.180423079966 Dec: -40.2199088737139 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 276.187763946904 Dec: -40.2038897505641 [deg; J2000]
{ 18h 24m 45.1s , -40d 12' 14.0" }
+/- 2.02543616401176 [arcmin] (estimated 90% radius based on SNR)
+/- 0.836090754376413 [arcmin] (formal 1-sigma fit error)
SNR: 11.0977445221991
Angular difference between Flight and Ground position is 1.018302 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 109.339999914169 +/- 25.7051645793594
Measured from: 24.3080001473427
to: 133.648000061512 [s; relative to TRIGTIME]
T50: 49.0919999480247 +/- 15.0826273634608
Measured from: 45.4800001382828
to: 94.5720000863075 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 67.1280000209808
to: 68.1280000209808 [s; relative to TRIGTIME]
Total Fluence
Measured from: 16.7639999985695
to: 158.216000020504 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.658312 0.696165 0.765296 0.171338
0.081221 0.076902 0.065823 0.058178 [error]
Peak 0.021776 0.011138 0.020192 0.004917
0.007116 0.006584 0.005524 0.004818 [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 1.50e-07 3.27e-07 5.61e-07 2.21e-06 1.54e-06 3.25e-06 erg/cm2
Error 3.03e-08 3.79e-08 6.44e-08 6.04e-07 1.62e-07 6.35e-07 erg/cm2
Peak flux Power-law 1.36e-01 1.39e-01 1.00e-01 1.16e-01 4.20e-01 4.90e-01 ph/cm2/s
Error 9.72e-02 5.78e-02 4.83e-02 1.36e-01 1.56e-01 1.78e-01 ph/cm2/s
Fluence Cutoff-PL 1.51e-07 3.28e-07 5.61e-07 2.19e-06 1.54e-06 3.23e-06 erg/cm2
Error 3.36e-08 3.89e-08 6.88e-08 8.09e-07 1.65e-07 8.03e-07 erg/cm2
Peak flux Cutoff-PL 1.35e-01 1.39e-01 1.00e-01 1.16e-01 4.19e-01 4.90e-01 ph/cm2/s
Error 9.60e-02 5.76e-02 4.83e-02 1.50e-01 1.56e-01 1.79e-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 1.224 0.184 - - 1.10e-03 1.06e-04 45.050 57
CPL 1.220 0.428 9999.2 0.0 1.10e-03 1.10e-03 45.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.471 0.825 - - 3.39e-03 1.27e-03 57.940 57
CPL 1.488 0.000 9999.4 0.0 3.39e-03 0.00e+00 57.940 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: 91.712000 sec.
T50 in the 50-300 keV band: 44.224000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 141.452 16.764 158.216
T90 109.340 24.308 133.648
T50 49.092 45.480 94.572
Peak 1.000 67.128 68.128
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
276.1878 -40.2039 0.0172 18.4 172.1 1.2640 11.1 TRIG_00769567
------------------------------------------
Foreground time interval of the image:
16.764 70.101 (delta_t = 53.337 [sec])
Background time interval of the image:
-78.499 16.764 (delta_t = 95.263 [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
Multiple GTIs in the spectrum
tstart tstop
16.764000 75.290000
76.000000 76.660000
78.000000 81.290000
82.000000 158.216000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22440 ( -0.185321 0.182721 )
Norm@50keV : 1.09937E-03 ( -0.000106151 0.000106033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.7903 for 57 degrees of freedom
# Null hypothesis probability = 8.739841e-01
Photon flux (15-150 keV) in 138.7 sec: 0.129504 ( -0.0131988 0.0132589 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53655e-06 ( -1.61701e-07 1.6278e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
16.764000 75.290000
76.000000 76.660000
78.000000 81.290000
82.000000 158.216000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21992 ( -0.662714 0.192349 )
Epeak [keV] : 9999.25 ( -9999.27 -9999.27 )
Norm@50keV : 1.10444E-03 ( -0.00110444 0.00108652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8044 for 56 degrees of freedom
# Null hypothesis probability = 8.524782e-01
Photon flux (15-150 keV) in 138.7 sec: 0.129455 ( -0.013993 0.013104 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53605e-06 ( -1.6841e-07 1.62543e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
16.764000 75.290000
76.000000 76.660000
78.000000 81.290000
82.000000 158.216000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.978026 ( 0.978026 0.978026 )
beta : -1.22439 ( -0.182647 0.185453 )
Epeak [keV] : 47.5771 ( -47.5761 -47.5761 )
Norm@50keV : 2.02149E-03 ( -0.00102806 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.05 using 59 PHA bins.
# Reduced chi-squared = 0.8190 for 55 degrees of freedom
# Null hypothesis probability = 8.285909e-01
Photon flux (15-150 keV) in 138.7 sec: 0.128961 ( ) 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] : 20.8686 (-2.60973 3.13253)
R^2/D10^2 : 5.03465E-03 (-0.00183109 0.00277314)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.55 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.813716e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.761e-08 1.261e-08
25- 50 2.950e-07 4.452e-08
50-150 9.569e-07 1.801e-07
15-150 1.309e-06 1.903e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-27.6073 -200)
Norm : 0.542879 (-0.053236 0.053236)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.61 using 59 PHA bins.
# Reduced chi-squared = 0.9757 for 57 degrees of freedom
# Null hypothesis probability = 5.271881e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.876e-07 9.954e-08
25- 50 3.608e-07 1.719e-07
50-150 7.913e-07 4.240e-07
15-150 1.340e-06 6.661e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.55368 (-1.60376 2.21167)
R1^2/D10^2 : 0.599597 (-0.484617 2.60022)
kT2 [keV] : 26.0849 (-4.19993 6.5128)
R2^2/D10^2 : 2.27758E-03 (-0.00116978 0.00179494)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.78 using 59 PHA bins.
# Reduced chi-squared = 0.7596 for 55 degrees of freedom
# Null hypothesis probability = 9.055185e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.735e-07 8.493e-08
25- 50 2.820e-07 8.121e-08
50-150 1.061e-06 2.688e-07
15-150 1.516e-06 3.732e-07
Peak spectrum fit
Power-law model
Time interval is from 67.128 sec. to 68.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47119 ( -0.818836 0.832111 )
Norm@50keV : 3.38820E-03 ( -0.00131108 0.001219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.404498e-01
Photon flux (15-150 keV) in 1 sec: 0.419742 ( -0.156196 0.156526 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23054e-08 ( -1.31178e-08 1.33819e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 67.128 sec. to 68.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48759 ( )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 3.38973E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 56 degrees of freedom
# Null hypothesis probability = 4.033981e-01
Photon flux (15-150 keV) in 1 sec: 0.419335 ( -0.154932 0.156627 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19416e-08 ( -1.27042e-08 1.32344e-08 ) ergs/cm2
Band function
Time interval is from 67.128 sec. to 68.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25621 ( 1.25628 1.25628 )
beta : -1.46992 ( 1.47031 0.818768 )
Epeak [keV] : 14.1571 ( -14.1134 -14.1134 )
Norm@50keV : 7.17309E-03 ( -0.00717991 0.117271 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.94 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 55 degrees of freedom
# Null hypothesis probability = 3.674257e-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] : 26.0290 (-11.6862 28.6003)
R^2/D10^2 : 7.31886E-03 (-0.00730805 0.0416167)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.21 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.961379e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.944e-09 3.740e-09
25- 50 6.407e-09 4.315e-09
50-150 6.792e-10 6.200e-10
15-150 1.303e-08 8.285e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 1.70179 (-0.612014 0.612088)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.58 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 57 degrees of freedom
# Null hypothesis probability = 4.174080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.238e-09 2.778e-09
25- 50 8.152e-09 5.015e-09
50-150 1.788e-08 1.091e-08
15-150 3.027e-08 1.896e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.73423 (-1.99123 2.77467)
R1^2/D10^2 : 2.92290 (-2.55678 38.226)
kT2 [keV] : 37.1919 (-16.7116 -37.2983)
R2^2/D10^2 : 2.27087E-03 (-0.00216 0.00598937)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.48 using 59 PHA bins.
# Reduced chi-squared = 0.9905 for 55 degrees of freedom
# Null hypothesis probability = 4.945510e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.110e-09 3.852e-09
25- 50 6.082e-09 3.348e-09
50-150 2.489e-08 1.670e-08
15-150 3.708e-08 2.007e-08
Plot creation:
Mon Aug 28 08:43:34 EDT 2017