batgrbproduct analysis for trigger=790053
batgrbproduct Analysis for Trigger=790053
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 Nov 16 11:57:38 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger790053/GCN5_download_cron
======================================================================
Trigger: 00790053 Segment: 000
BAT Trigger Time: 532464700.864 [s; MET]
Trigger Stop: 532464702.912 [s; MET]
UTC: 2017-11-15T18:51:20.858340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 278.412563701263 Dec: 9.12838471438907 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.59
Image Trigger?: NO
Rate S/N Ratio: 8.83176086632785 [ if not an image trigger ]
Image S/N Ratio: 7.59
Flight Position: [ source = BAT ]
RA: 278.412563701263 Dec: 9.12838471438907 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 278.389824653995 Dec: 9.11058944920035 [deg; J2000]
{ 18h 33m 33.6s , +09d 06' 38.1" }
+/- 1.65367231703706 [arcmin] (estimated 90% radius based on SNR)
+/- 0.772557412431527 [arcmin] (formal 1-sigma fit error)
SNR: 14.8268102026515
Angular difference between Flight and Ground position is 1.718921 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -15.8639999032021
to: 32.1360000967979 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -15.8639999032021
to: 16.1360000967979 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -8.36400002241135
to: -7.36400002241135 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.8640000224113
to: 32.1359999775887 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.451556 0.441267 0.316029 0.055043
0.043728 0.042479 0.036121 0.031229 [error]
Peak 0.002499 0.004711 0.001267 -0.005550
0.006100 0.006042 0.005124 0.004591 [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 1.17e-07 1.90e-07 2.32e-07 5.61e-07 6.98e-07 1.10e-06 erg/cm2
Error 1.92e-08 1.89e-08 3.61e-08 1.86e-07 8.27e-08 2.17e-07 erg/cm2
Peak flux Power-law 3.85e-02 2.10e-02 7.20e-03 3.20e-03 6.85e-02 6.99e-02 ph/cm2/s
Error 6.19e-02 3.36e-02 2.33e-02 2.21e-01 1.01e-01 2.27e-01 ph/cm2/s
Fluence Cutoff-PL 1.18e-07 1.90e-07 2.30e-07 5.14e-07 6.99e-07 1.05e-06 erg/cm2
Error 1.90e-08 1.87e-08 3.60e-08 2.44e-07 8.09e-08 2.70e-07 erg/cm2
Peak flux Cutoff-PL 3.69e-02 2.30e-02 7.58e-03 2.47e-03 6.75e-02 6.92e-02 ph/cm2/s
Error 6.19e-02 4.63e-02 3.43e-02 -------- 1.01e-01 1.06e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.32e-01 2.08e-01 1.16e-01 6.64e-02 5.93e-01 6.23e-01 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 1.706 0.195 - - 1.57e-03 1.75e-04 58.700 57
CPL 2.421 0.205 147.5 -0.0 7.15e-04 3.99e-04 58.620 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.547 0.000 - - 3.38e-04 7.45e-04 36.330 57
CPL 1.288 0.000 26.7 0.0 1.61e-03 0.00e+00 36.320 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: 9.024000 sec.
T50 in the 50-300 keV band: 3.712000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 48.000 -15.864 32.136
T90 48.000 -15.864 32.136
T50 32.000 -15.864 16.136
Peak 1.000 -8.364 -7.364
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
278.3898 +9.1106 0.0129 12.0 20.4 1.2298 14.8 TRIG_00790053
------------------------------------------
Foreground time interval of the image:
-15.864 25.837 (delta_t = 41.701 [sec])
Background time interval of the image:
-175.363 -15.864 (delta_t = 159.499 [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 -15.864 sec. to 32.136 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70624 ( -0.192215 0.19712 )
Norm@50keV : 1.57240E-03 ( -0.000176661 0.000172967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.127566e-01
Photon flux (15-150 keV) in 48 sec: 0.209289 ( -0.0209226 0.0209593 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.98472e-07 ( -8.20378e-08 8.34288e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.864 sec. to 32.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.42072 ( -0.221356 0.189527 )
Epeak [keV] : 147.540 ( -9999.35 -9999.36 )
Norm@50keV : 7.15295E-04 ( -0.000288432 0.00051005 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.62 using 59 PHA bins.
# Reduced chi-squared = 1.047 for 56 degrees of freedom
# Null hypothesis probability = 3.795371e-01
Photon flux (15-150 keV) in 48 sec: 0.209585 ( -0.02144 0.020676 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.99206e-07 ( -8.2872e-08 7.8984e-08 ) ergs/cm2
Band function
Time interval is from -15.864 sec. to 32.136 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35472 ( 1.35592 1.35592 )
beta : -1.70621 ( 1.70622 0.192169 )
Epeak [keV] : 25.1025 ( -24.5474 -24.5474 )
Norm@50keV : 3.52480E-03 ( -0.00174162 0.2337 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.71 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Null hypothesis probability = 3.413076e-01
Photon flux (15-150 keV) in 48 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] : 12.0660 (-1.74014 2.13695)
R^2/D10^2 : 4.71303E-02 (-0.0208603 0.0365408)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.66 using 59 PHA bins.
# Reduced chi-squared = 1.713 for 57 degrees of freedom
# Null hypothesis probability = 6.482720e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.969e-08 1.430e-08
25- 50 2.207e-07 3.149e-08
50-150 1.939e-07 5.326e-08
15-150 4.844e-07 6.816e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 147.489 (-59.8083 -146.002)
Norm : 0.851835 (-0.0956249 0.134114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.83 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.078688e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.052e-07 1.956e-08
25- 50 1.944e-07 6.134e-08
50-150 3.811e-07 2.133e-07
15-150 6.807e-07 2.984e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.88464 (-1.40516 1.75065)
R1^2/D10^2 : 0.514308 (-0.315668 0.875743)
kT2 [keV] : 28.0146 (-7.9651 21.056)
R2^2/D10^2 : 1.97321E-03 (-0.00159675 0.00376382)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.04 using 59 PHA bins.
# Reduced chi-squared = 1.073 for 55 degrees of freedom
# Null hypothesis probability = 3.302577e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.225e-07 4.647e-08
25- 50 1.781e-07 5.599e-08
50-150 4.209e-07 2.272e-07
15-150 7.215e-07 2.826e-07
Peak spectrum fit
Power-law model
Time interval is from -8.364 sec. to -7.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.54719 ( -2.54719 -2.54719 )
Norm@50keV : 3.38471E-04 ( -0.000338471 0.00115177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.33 using 59 PHA bins.
# Reduced chi-squared = 0.6374 for 57 degrees of freedom
# Null hypothesis probability = 9.850724e-01
Photon flux (15-150 keV) in 1 sec: 6.84608E-02 ( -0.0684608 0.134113 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.42934e-09 ( -3.42934e-09 1.11211e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.364 sec. to -7.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28776 ( )
Epeak [keV] : 26.6965 ( )
Norm@50keV : 1.61151E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.32 using 59 PHA bins.
# Reduced chi-squared = 0.6486 for 56 degrees of freedom
# Null hypothesis probability = 9.808419e-01
Photon flux (15-150 keV) in 1 sec: 6.75372E-02 ( -0.0675372 0.134446 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.45363e-09 ( -3.45363e-09 1.10155e-08 ) ergs/cm2
Band function
Time interval is from -8.364 sec. to -7.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29784 ( 1.13332 1.13332 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 25.0408 ( -24.6738 -24.6738 )
Norm@50keV : 1.74997E-03 ( -0.00146681 672.222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.32 using 59 PHA bins.
# Reduced chi-squared = 0.6604 for 55 degrees of freedom
# Null hypothesis probability = 9.755556e-01
Photon flux (15-150 keV) in 1 sec: 0.592639 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.86255e-08 ( -3.86185e-08 -1.2071e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.8508 (-5.70378 -5.70378)
R^2/D10^2 : 2.33651E-02 (-0.0233377 -0.0233377)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.40 using 59 PHA bins.
# Reduced chi-squared = 0.6385 for 57 degrees of freedom
# Null hypothesis probability = 9.847564e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.113e-09 1.119e-09
25- 50 9.025e-10 7.505e-10
50-150 5.585e-11 9.805e-11
15-150 2.071e-09 1.343e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.5518 (-38.5645 -38.5645)
Norm : 0.457372 (-0.466605 -0.466605)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.32 using 59 PHA bins.
# Reduced chi-squared = 0.6372 for 57 degrees of freedom
# Null hypothesis probability = 9.851116e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.046e-09 1.018e-09
25- 50 1.370e-09 1.471e-09
50-150 1.047e-09 1.988e-09
15-150 3.463e-09 4.010e-09
Double BB
# Reduced chi-squared = 0.6561 for 55 degrees of freedom
# Reduced chi-squared = 0.6553 for 55 degrees of freedom
# Reduced chi-squared = 0.6546 for 55 degrees of freedom
# Reduced chi-squared = 0.6543 for 55 degrees of freedom
# Reduced chi-squared = 0.6541 for 55 degrees of freedom
# Null hypothesis probability = 9.763527e-01
# Null hypothesis probability = 9.765375e-01
# Null hypothesis probability = 9.768413e-01
# Null hypothesis probability = 9.772103e-01
# Null hypothesis probability = 9.775335e-01
# Null hypothesis probability = 9.777693e-01
# Null hypothesis probability = 9.779091e-01
# Null hypothesis probability = 9.779819e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.101e-09 7.455e-10
25- 50 1.309e-09 1.488e-09
50-150 1.406e-09 1.382e-09
15-150 3.815e-09 4.971e-09
Plot creation:
Thu Nov 16 12:05:56 EST 2017