batgrbproduct analysis for trigger=984929
batgrbproduct Analysis for Trigger=984929
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): Thu Jul 30 12:51:09 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger984929/batgroup_hand_proc
======================================================================
Trigger: 00984929 Segment: 000
BAT Trigger Time: 617744310.464 [s; MET]
Trigger Stop: 617744318.656 [s; MET]
UTC: 2020-07-29T19:38:05.095420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 184.374725606312 Dec: 45.5823142434638 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.81
Image Trigger?: NO
Rate S/N Ratio: 9.59166304662544 [ if not an image trigger ]
Image S/N Ratio: 8.81
Flight Position: [ source = BAT ]
RA: 184.374725606312 Dec: 45.5823142434638 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 184.360293791043 Dec: 45.5705349045416 [deg; J2000]
{ 12h 17m 26.5s , +45d 34' 13.9" }
+/- 2.31868852413339 [arcmin] (estimated 90% radius based on SNR)
+/- 1.27353682534939 [arcmin] (formal 1-sigma fit error)
SNR: 9.14836544638276
Angular difference between Flight and Ground position is 0.931057 arcmin
Partial Coding Fraction: 0.4609375 [ including projection effects ]
Duration
T90: 122 +/- 34.2344855372474
Measured from: 1.53600001335144
to: 123.536000013351 [s; relative to TRIGTIME]
T50: 57 +/- 24.8243831746128
Measured from: 7.53600001335144
to: 64.5360000133514 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.53600001335144
to: 6.53600001335144 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.53600001335144
to: 136.536000013351 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.288433 0.584691 0.903058 0.193098
0.106651 0.111376 0.099071 0.087403 [error]
Peak 0.026092 0.023619 0.035718 0.025011
0.011558 0.011721 0.011197 0.009379 [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 1.13e-07 2.90e-07 5.95e-07 3.10e-06 1.60e-06 4.10e-06 erg/cm2
Error 3.84e-08 5.96e-08 9.19e-08 1.12e-06 2.46e-07 1.14e-06 erg/cm2
Peak flux Power-law 1.26e-01 2.02e-01 2.45e-01 5.84e-01 7.40e-01 1.16e+00 ph/cm2/s
Error 1.14e-01 1.14e-01 8.24e-02 4.42e-01 2.89e-01 4.23e-01 ph/cm2/s
Fluence Cutoff-PL 8.28e-08 2.95e-07 6.62e-07 1.24e-06 1.56e-06 2.28e-06 erg/cm2
Error 4.88e-08 6.83e-08 1.21e-07 1.55e-06 2.58e-07 1.00e-06 erg/cm2
Peak flux Cutoff-PL 1.14e-01 2.01e-01 2.54e-01 4.90e-01 7.32e-01 1.08e+00 ph/cm2/s
Error 1.30e-01 1.59e-01 1.05e-01 5.57e-01 2.96e-01 5.27e-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 0.961 0.267 - - 1.08e-03 1.74e-04 41.760 57
CPL -0.008 1.359 129.9 -41.4 2.62e-03 4.61e-03 39.860 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.721 0.691 - - 6.41e-03 2.72e-03 50.150 57
CPL 0.455 1.104 406.1 0.0 7.97e-03 6.99e-02 50.120 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: 54.336000 sec.
T50 in the 50-300 keV band: 28.288000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 136.000 0.536 136.536
T90 122.000 1.536 123.536
T50 57.000 7.536 64.536
Peak 1.000 5.536 6.536
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
184.3603 +45.5705 0.0210 41.5 -158.9 1.5742 9.1 TRIG_00984929
------------------------------------------
Foreground time interval of the image:
0.536 50.237 (delta_t = 49.701 [sec])
Background time interval of the image:
-239.464 0.536 (delta_t = 240.000 [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 0.536 sec. to 136.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.961110 ( -0.276547 0.258376 )
Norm@50keV : 1.07605E-03 ( -0.000175316 0.000171996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7327 for 57 degrees of freedom
# Null hypothesis probability = 9.350572e-01
Photon flux (15-150 keV) in 136 sec: 0.123669 ( -0.0202425 0.0205052 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.60483e-06 ( -2.45193e-07 2.45899e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.536 sec. to 136.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.48260E-03 ( -1.65016 1.06741 )
Epeak [keV] : 129.939 ( -47.0662 -129.939 )
Norm@50keV : 2.62050E-03 ( -0.00161822 0.00760059 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.86 using 59 PHA bins.
# Reduced chi-squared = 0.7117 for 56 degrees of freedom
# Null hypothesis probability = 9.493201e-01
Photon flux (15-150 keV) in 136 sec: 0.117772 ( -0.0215254 0.021759 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55961e-06 ( -2.59572e-07 2.56455e-07 ) ergs/cm2
Band function
Time interval is from 0.536 sec. to 136.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 6.41501E-03 ( -0.717626 1.40451 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 130.046 ( -33.935 262.042 )
Norm@50keV : 2.61631E-03 ( -0.00162741 0.00762215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.86 using 59 PHA bins.
# Reduced chi-squared = 0.7247 for 55 degrees of freedom
# Null hypothesis probability = 9.379311e-01
Photon flux (15-150 keV) in 136 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] : 24.1573 (-4.01454 5.46805)
R^2/D10^2 : 3.39656E-03 (-0.00161262 0.00272832)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.76 using 59 PHA bins.
# Reduced chi-squared = 0.7326 for 57 degrees of freedom
# Null hypothesis probability = 9.351861e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.767e-08 1.493e-08
25- 50 2.657e-07 7.188e-08
50-150 1.154e-06 2.965e-07
15-150 1.468e-06 3.545e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.9692 -200)
Norm : 0.534505 (-0.0846901 0.0846901)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.06 using 59 PHA bins.
# Reduced chi-squared = 0.9835 for 57 degrees of freedom
# Null hypothesis probability = 5.103796e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.811e-07 1.031e-07
25- 50 3.484e-07 1.977e-07
50-150 7.640e-07 4.283e-07
15-150 1.294e-06 7.296e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.09774 (-6.09962 -6.09962)
R1^2/D10^2 : 8.34798E-02 (-0.0832822 -0.0832822)
kT2 [keV] : 27.1722 (-5.93281 -27.1757)
R2^2/D10^2 : 2.22009E-03 (-0.00221901 0.00226326)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.55 using 59 PHA bins.
# Reduced chi-squared = 0.7190 for 55 degrees of freedom
# Null hypothesis probability = 9.423140e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.438e-08 5.520e-08
25- 50 2.778e-07 1.370e-07
50-150 1.182e-06 6.514e-07
15-150 1.555e-06 8.075e-07
Peak spectrum fit
Power-law model
Time interval is from 5.536 sec. to 6.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.721122 ( -0.773142 0.609661 )
Norm@50keV : 6.41471E-03 ( -0.00285567 0.00258868 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.8799 for 57 degrees of freedom
# Null hypothesis probability = 7.277049e-01
Photon flux (15-150 keV) in 1 sec: 0.740347 ( -0.28361 0.295106 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.75625e-08 ( -2.61465e-08 2.61617e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.536 sec. to 6.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.454700 ( -2.66286 -0.4547 )
Epeak [keV] : 406.064 ( -406.064 -406.064 )
Norm@50keV : 7.97031E-03 ( -0.00426103 0.135579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.12 using 59 PHA bins.
# Reduced chi-squared = 0.8949 for 56 degrees of freedom
# Null hypothesis probability = 6.960598e-01
Photon flux (15-150 keV) in 1 sec: 0.732184 ( -0.290648 0.300646 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.76047e-08 ( -2.62269e-08 2.62323e-08 ) ergs/cm2
Band function
Time interval is from 5.536 sec. to 6.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.838679 ( 0.838723 0.838723 )
beta : -0.721121 ( -0.609126 0.773463 )
Epeak [keV] : 12.3583 ( -12.3577 -12.3577 )
Norm@50keV : 1.01775E-02 ( -0.00627639 163735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.15 using 59 PHA bins.
# Reduced chi-squared = 0.9119 for 55 degrees of freedom
# Null hypothesis probability = 6.600014e-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] : 31.9778 (-11.959 36.4646)
R^2/D10^2 : 9.41875E-03 (-0.00941814 0.0298104)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.90 using 59 PHA bins.
# Reduced chi-squared = 0.8929 for 57 degrees of freedom
# Null hypothesis probability = 7.020780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.448e-09 9.530e-10
25- 50 9.158e-09 5.780e-09
50-150 6.435e-08 3.924e-08
15-150 7.495e-08 4.590e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-92.8494 -200)
Norm : 3.23317 (-1.22842 1.22842)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 0.9726 for 57 degrees of freedom
# Null hypothesis probability = 5.339711e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.061e-09 5.180e-09
25- 50 1.551e-08 9.700e-09
50-150 3.401e-08 2.090e-08
15-150 5.757e-08 3.625e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32957 (-7.29861 -7.29861)
R1^2/D10^2 : 0.367164 (-0.370607 2.28254)
kT2 [keV] : 40.0427 (-40.0081 -40.0081)
R2^2/D10^2 : 4.64358E-03 (-0.00465528 0.0250475)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.92 using 59 PHA bins.
# Reduced chi-squared = 0.9076 for 55 degrees of freedom
# Null hypothesis probability = 6.687226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.275e-09 3.101e-09
25- 50 1.151e-08 6.460e-09
50-150 6.366e-08 3.722e-08
15-150 7.944e-08 4.210e-08
Plot creation:
Thu Jul 30 13:01:58 EDT 2020