batgrbproduct analysis for trigger=982707
batgrbproduct Analysis for Trigger=982707
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 v2.47
Process Start Time (local time): Fri Jul 17 13:13:35 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger982707/batgroup_hand_proc
======================================================================
Trigger: 00982707 Segment: 000
BAT Trigger Time: 616633086.72 [s; MET]
Trigger Stop: 616633086.976 [s; MET]
UTC: 2020-07-16T22:57:41.424000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 196.012971445604 Dec: 29.6298658681777 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.06
Image Trigger?: NO
Rate S/N Ratio: 178.566514218092 [ if not an image trigger ]
Image S/N Ratio: 18.06
Flight Position: [ source = BAT ]
RA: 196.012971445604 Dec: 29.6298658681777 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 196.011699663596 Dec: 29.6377453183828 [deg; J2000]
{ 13h 04m 02.8s , +29d 38' 15.9" }
+/- 0.832548606793049 [arcmin] (estimated 90% radius based on SNR)
+/- 0.307462335089814 [arcmin] (formal 1-sigma fit error)
SNR: 39.5201836165529
Angular difference between Flight and Ground position is 0.477397 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 86.5719999074936 +/- 15.1708020454952
Measured from: -0.0360000133514404
to: 86.5359998941422 [s; relative to TRIGTIME]
T50: 27.3919999599457 +/- 4.82437846956668
Measured from: 0.635999917984009
to: 28.0279998779297 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.180000066757202
to: 0.819999933242798 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.420000076293945
to: 112.631999969482 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.673364 2.200893 1.517843 0.325384
0.081999 0.086060 0.075962 0.066839 [error]
Peak 0.232056 0.442855 0.509601 0.189416
0.014694 0.018280 0.019336 0.015318 [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 5.62e-07 9.45e-07 1.21e-06 3.10e-06 3.57e-06 5.82e-06 erg/cm2
Error 4.61e-08 4.57e-08 7.68e-08 4.30e-07 1.81e-07 4.85e-07 erg/cm2
Peak flux Power-law 2.34e+00 3.21e+00 3.27e+00 6.04e+00 1.07e+01 1.49e+01 ph/cm2/s
Error 2.06e-01 1.72e-01 1.51e-01 6.08e-01 4.67e-01 7.08e-01 ph/cm2/s
Fluence Cutoff-PL 5.57e-07 9.51e-07 1.21e-06 2.81e-06 3.56e-06 5.52e-06 erg/cm2
Error 5.28e-08 5.19e-08 7.97e-08 9.03e-07 2.00e-07 9.02e-07 erg/cm2
Peak flux Cutoff-PL 2.24e+00 3.24e+00 3.33e+00 5.11e+00 1.07e+01 1.39e+01 ph/cm2/s
Error 2.59e-01 1.82e-01 1.90e-01 1.19e+00 4.78e-01 1.36e+00 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 1.646 0.086 - - 3.40e-03 1.61e-04 33.830 57
CPL 1.585 0.236 339.2 0.0 3.65e-03 1.03e-03 33.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.977 0.075 - - 9.35e-02 4.01e-03 57.520 57
CPL 0.816 0.254 428.3 0.0 1.10e-01 2.81e-02 56.540 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: 5.440000 sec.
T50 in the 50-300 keV band: 2.048000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 113.052 -0.420 112.632
T90 86.572 -0.036 86.536
T50 27.392 0.636 28.028
Peak 1.000 -0.180 0.820
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
196.0117 +29.6377 0.0049 33.9 161.4 3.9505 39.5 TRIG_00982707
------------------------------------------
Foreground time interval of the image:
-0.420 17.381 (delta_t = 17.801 [sec])
Background time interval of the image:
-239.720 -0.420 (delta_t = 239.300 [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 -0.420 sec. to 112.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64559 ( -0.0860119 0.0865893 )
Norm@50keV : 3.39622E-03 ( -0.000161758 0.000161197 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.83 using 59 PHA bins.
# Reduced chi-squared = 0.5935 for 57 degrees of freedom
# Null hypothesis probability = 9.937450e-01
Photon flux (15-150 keV) in 113.1 sec: 0.442820 ( -0.0213259 0.0213915 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57398e-06 ( -1.80648e-07 1.8146e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.420 sec. to 112.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58461 ( -0.330954 0.140527 )
Epeak [keV] : 339.226 ( -339.256 -339.256 )
Norm@50keV : 3.64569E-03 ( -0.000400996 0.00165633 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.72 using 59 PHA bins.
# Reduced chi-squared = 0.6022 for 56 degrees of freedom
# Null hypothesis probability = 9.920092e-01
Photon flux (15-150 keV) in 113.1 sec: 0.441142 ( -0.022816 0.022462 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.55715e-06 ( -2.04496e-07 1.94736e-07 ) ergs/cm2
Band function
Time interval is from -0.420 sec. to 112.632 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.79123E-02 ( 0.79877 0.79877 )
beta : -1.68559 ( 1.68542 0.108432 )
Epeak [keV] : 31.7134 ( -31.6809 223.296 )
Norm@50keV : 5.01798E-02 ( -0.0510512 403.908 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.56 using 59 PHA bins.
# Reduced chi-squared = 0.5921 for 55 degrees of freedom
# Null hypothesis probability = 9.930896e-01
Photon flux (15-150 keV) in 113.1 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] : 13.8065 ( )
R^2/D10^2 : 6.28716E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 157.41 using 59 PHA bins.
# Reduced chi-squared = 2.7615 for 57 degrees of freedom
# Null hypothesis probability = 2.416846e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.867e-07 2.680e-08
25- 50 1.051e-06 6.288e-08
50-150 1.310e-06 1.312e-07
15-150 2.648e-06 1.442e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 162.499 (-34.7223 -162.677)
Norm : 1.79736 (-0.0971328 0.107605)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.07 using 59 PHA bins.
# Reduced chi-squared = 0.6328 for 57 degrees of freedom
# Null hypothesis probability = 9.862807e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.183e-07 3.834e-08
25- 50 9.716e-07 1.028e-07
50-150 1.980e-06 6.007e-07
15-150 3.470e-06 7.193e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.12573 (-0.979228 1.04841)
R1^2/D10^2 : 0.486351 (-0.181048 0.334447)
kT2 [keV] : 28.3316 (-4.64566 7.33806)
R2^2/D10^2 : 3.78984E-03 (-0.00204055 0.00345006)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.10 using 59 PHA bins.
# Reduced chi-squared = 0.6382 for 55 degrees of freedom
# Null hypothesis probability = 9.832226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.126e-07 7.142e-08
25- 50 9.829e-07 1.052e-07
50-150 2.055e-06 4.439e-07
15-150 3.550e-06 5.208e-07
Peak spectrum fit
Power-law model
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.976735 ( -0.0749161 0.0741708 )
Norm@50keV : 9.34696E-02 ( -0.00401031 0.00400198 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.556356e-01
Photon flux (15-150 keV) in 1 sec: 10.7493 ( -0.46713 0.467225 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01919e-06 ( -4.75767e-08 4.77163e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.816047 ( -0.291803 0.215315 )
Epeak [keV] : 428.294 ( -428.293 -428.293 )
Norm@50keV : 0.110176 ( -0.0192992 0.036847 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 56 degrees of freedom
# Null hypothesis probability = 4.547093e-01
Photon flux (15-150 keV) in 1 sec: 10.6889 ( -0.4777 0.4778 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01331e-06 ( -4.9405e-08 4.918e-08 ) ergs/cm2
Band function
Time interval is from -0.180 sec. to 0.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.03269 ( -0.0831844 0.0825788 )
Epeak [keV] : 28.0521 ( -12.0816 3.61517 )
Norm@50keV : 3191.39 ( -134.679 6839.71 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.89 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 55 degrees of freedom
# Null hypothesis probability = 5.555889e-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] : 22.7549 ( )
R^2/D10^2 : 0.349369 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 153.56 using 59 PHA bins.
# Reduced chi-squared = 2.6940 for 57 degrees of freedom
# Null hypothesis probability = 8.483254e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.295e-08 2.870e-09
25- 50 1.777e-07 1.080e-08
50-150 6.875e-07 4.575e-08
15-150 8.982e-07 5.015e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 43.1032 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 214.61 using 59 PHA bins.
# Reduced chi-squared = 3.7651 for 57 degrees of freedom
# Null hypothesis probability = 4.054882e-20
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.073e-07 5.000e-09
25- 50 2.065e-07 9.900e-09
50-150 4.528e-07 2.200e-08
15-150 7.666e-07 3.900e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.46885 (-1.401 1.6935)
R1^2/D10^2 : 4.14902 (-1.70135 3.14895)
kT2 [keV] : 36.9354 (-5.22642 8.7485)
R2^2/D10^2 : 6.83028E-02 (-0.0319775 0.041987)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.75 using 59 PHA bins.
# Reduced chi-squared = 0.9772 for 55 degrees of freedom
# Null hypothesis probability = 5.225932e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.867e-08 1.179e-08
25- 50 1.925e-07 2.630e-08
50-150 7.646e-07 1.182e-07
15-150 1.026e-06 1.497e-07
Plot creation:
Fri Jul 17 13:29:17 EDT 2020