batgrbproduct analysis for trigger=778435
batgrbproduct Analysis for Trigger=778435
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 Oct 14 02:19:31 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger778435/GCN5_download_cron
======================================================================
Trigger: 00778435 Segment: 000
BAT Trigger Time: 529546960.32 [s; MET]
Trigger Stop: 529546961.344 [s; MET]
UTC: 2017-10-13T00:22:20.488700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 84.085228409175 Dec: 34.449265719154 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.9
Image Trigger?: NO
Rate S/N Ratio: 5.74456264653803 [ if not an image trigger ]
Image S/N Ratio: 6.9
Flight Position: [ source = BAT ]
RA: 84.085228409175 Dec: 34.449265719154 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 84.0812224773365 Dec: 34.4089410260641 [deg; J2000]
{ 05h 36m 19.5s , +34d 24' 32.2" }
+/- 3.95099362177806 [arcmin] (estimated 90% radius based on SNR)
+/- 2.09422118268624 [arcmin] (formal 1-sigma fit error)
SNR: 4.27248717476583
Angular difference between Flight and Ground position is 2.427590 arcmin
Partial Coding Fraction: 0.578125 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 2.98023223876953e-08
to: 1.02400001883507 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.011671 0.043830 0.027802 -0.005877
0.008326 0.008840 0.007566 0.006631 [error]
Peak -0.011671 0.043830 0.027802 -0.005877
0.008326 0.008840 0.007566 0.006631 [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 3.49e-09 8.48e-09 1.64e-08 7.80e-08 4.44e-08 1.02e-07 erg/cm2
Error 2.48e-09 4.01e-09 6.56e-09 6.18e-08 1.76e-08 6.57e-08 erg/cm2
Peak flux Power-law 1.09e-01 1.44e-01 1.39e-01 2.39e-01 4.71e-01 6.27e-01 ph/cm2/s
Error 7.85e-02 6.96e-02 5.49e-02 1.73e-01 1.96e-01 2.50e-01 ph/cm2/s
Fluence Cutoff-PL 2.32e-09 1.25e-08 1.94e-08 4.38e-09 3.82e-08 3.86e-08 erg/cm2
Error 2.50e-09 6.58e-09 -------- 1.79e-08 8.87e-09 8.85e-09 erg/cm2
Peak flux Cutoff-PL 7.66e-02 3.41e-01 4.37e-02 6.28e-06 4.61e-01 4.61e-01 ph/cm2/s
Error 4.29e-02 1.15e-01 9.88e-02 3.36e-02 1.55e-01 1.55e-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 1.095 0.562 - - 4.12e-03 1.65e-03 71.830 57
CPL -10.000 -0.479 38.5 6.4 3.37e+04 7.63e+04 64.310 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.095 0.562 - - 4.12e-03 1.65e-03 71.830 57
CPL -10.000 -0.479 38.5 6.4 3.37e+04 7.63e+04 64.310 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
84.0812 +34.4089 0.0449 39.7 -2.8 0.0685 4.3 TRIG_00778435
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-239.320 -8.320 (delta_t = 231.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09539 ( -0.5774 0.546831 )
Norm@50keV : 4.11754E-03 ( -0.00167472 0.00162123 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.83 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.930058e-02
Photon flux (15-150 keV) in 1.024 sec: 0.470795 ( -0.19438 0.197443 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.44147e-08 ( -1.74076e-08 1.7722e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99999 ( 10 9.04205 )
Epeak [keV] : 38.5220 ( -4.44247 8.38968 )
Norm@50keV : 3.37257E+04 ( -33389.2 119288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.31 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 56 degrees of freedom
# Null hypothesis probability = 2.084010e-01
Photon flux (15-150 keV) in 1.024 sec: 0.461092 0.460164 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.71702e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.45901 -5 )
beta : -2.28023 ( -2.15989 0.938375 )
Epeak [keV] : 43.1564 ( -8.07236 10.5618 )
Norm@50keV : 21.0063 ( -7.773 54.933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.98 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Null hypothesis probability = 2.147823e-01
Photon flux (15-150 keV) in 1.024 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] : 17.4514 (-5.2075 8.73684)
R^2/D10^2 : 4.14510E-02 (-0.041451 0.10159)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 57 degrees of freedom
# Null hypothesis probability = 1.729428e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.613e-09 1.732e-09
25- 50 1.180e-08 7.368e-09
50-150 2.587e-08 1.608e-08
15-150 4.029e-08 2.620e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.354 (-108.43 -199.359)
Norm : 2.06106 (-0.833331 0.837119)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.13 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.362217e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.7811 (-13.324 -13.324)
R1^2/D10^2 : 3.95766E-02 (-0.0444042 -0.0444042)
kT2 [keV] : 20.2339 (-21.3903 -21.3903)
R2^2/D10^2 : 1.75242E-02 (-0.0116966 -0.0116966)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.87 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.298961e-01
# Null hypothesis probability = 1.309130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09539 ( -0.5774 0.546831 )
Norm@50keV : 4.11754E-03 ( -0.00167472 0.00162123 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.83 using 59 PHA bins.
# Reduced chi-squared = 1.260 for 57 degrees of freedom
# Null hypothesis probability = 8.930058e-02
Photon flux (15-150 keV) in 1.024 sec: 0.470795 ( -0.19438 0.197443 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.44147e-08 ( -1.74076e-08 1.7722e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99999 ( 10 9.04205 )
Epeak [keV] : 38.5220 ( -4.44247 8.38968 )
Norm@50keV : 3.37257E+04 ( -33389.2 119288 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.31 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 56 degrees of freedom
# Null hypothesis probability = 2.084010e-01
Photon flux (15-150 keV) in 1.024 sec: 0.461092 0.460164 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.71702e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.45901 -5 )
beta : -2.28023 ( -2.1624 0.938377 )
Epeak [keV] : 43.1564 ( -8.07236 10.5618 )
Norm@50keV : 21.0063 ( -7.773 54.933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.98 using 59 PHA bins.
# Reduced chi-squared = 1.145 for 55 degrees of freedom
# Null hypothesis probability = 2.147823e-01
Photon flux (15-150 keV) in 1.024 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] : 17.4514 (-5.2075 8.73684)
R^2/D10^2 : 4.14510E-02 (-0.041451 0.10159)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 57 degrees of freedom
# Null hypothesis probability = 1.729428e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.613e-09 1.706e-09
25- 50 1.180e-08 7.578e-09
50-150 2.587e-08 1.693e-08
15-150 4.029e-08 2.567e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.354 (-108.43 -199.359)
Norm : 2.06106 (-0.833331 0.837119)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.13 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.362217e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.7811 (-13.324 -13.324)
R1^2/D10^2 : 3.95766E-02 (-0.0444042 -0.0444042)
kT2 [keV] : 20.2339 (-21.3903 -21.3903)
R2^2/D10^2 : 1.75242E-02 (-0.0116966 -0.0116966)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 66.87 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.298961e-01
# Null hypothesis probability = 1.309130e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat Oct 14 02:25:27 EDT 2017