batgrbproduct analysis for trigger=959917
batgrbproduct Analysis for Trigger=959917
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 Mar 7 16:53:42 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger959917/batgroup_hand_proc
======================================================================
Trigger: 00959917 Segment: 000
BAT Trigger Time: 605146804.736 [s; MET]
Trigger Stop: 605146805.76 [s; MET]
UTC: 2020-03-06T00:19:40.187060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 101.148811669039 Dec: -62.013026745735 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.74
Image Trigger?: NO
Rate S/N Ratio: 18.8414436814168 [ if not an image trigger ]
Image S/N Ratio: 9.74
Flight Position: [ source = BAT ]
RA: 101.148811669039 Dec: -62.013026745735 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 101.113680180009 Dec: -62.0095633076138 [deg; J2000]
{ 06h 44m 27.3s , -62d 00' 34.4" }
+/- 0.625534949759477 [arcmin] (estimated 90% radius based on SNR)
+/- 0.178055932983969 [arcmin] (formal 1-sigma fit error)
SNR: 59.4548861888114
Angular difference between Flight and Ground position is 1.010818 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 32.8719999790192 +/- 1.13437197060089
Measured from: 3.32400000095367
to: 36.1959999799728 [s; relative to TRIGTIME]
T50: 13.0080000162125 +/- 0.306307061583559
Measured from: 13.1080000400543
to: 26.1160000562668 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 20.1120001077652
to: 21.1120001077652 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.67199993133545
to: 49.9520000219345 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.522735 6.655619 4.708478 0.889785
0.062532 0.068992 0.060818 0.046517 [error]
Peak 0.200125 0.331248 0.254293 0.042618
0.010662 0.012610 0.011212 0.007603 [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 1.75e-06 2.84e-06 3.48e-06 8.41e-06 1.05e-05 1.65e-05 erg/cm2
Error 6.07e-08 5.80e-08 6.98e-08 3.80e-07 1.80e-07 4.14e-07 erg/cm2
Peak flux Power-law 2.36e+00 2.34e+00 1.63e+00 1.79e+00 7.04e+00 8.12e+00 ph/cm2/s
Error 1.79e-01 1.13e-01 8.97e-02 1.97e-01 3.24e-01 3.64e-01 ph/cm2/s
Fluence Cutoff-PL 1.47e-06 2.92e-06 3.68e-06 4.24e-06 1.01e-05 1.23e-05 erg/cm2
Error 7.90e-08 6.32e-08 8.34e-08 5.73e-07 1.97e-07 6.02e-07 erg/cm2
Peak flux Cutoff-PL 1.98e+00 2.53e+00 1.76e+00 7.77e-01 6.79e+00 7.06e+00 ph/cm2/s
Error 2.16e-01 1.37e-01 1.07e-01 2.27e-01 3.35e-01 4.05e-01 ph/cm2/s
Fluence Band 1.40e-06 2.95e-06 3.60e-06 6.23e-06 1.00e-05 1.42e-05 erg/cm2
Error 9.80e-08 7.70e-08 1.06e-07 -------- 1.96e-07 -------- erg/cm2
Peak flux Band 1.94e+00 2.57e+00 1.73e+00 1.09e+00 6.77e+00 7.32e+00 ph/cm2/s
Error 2.39e-01 1.62e-01 1.30e-01 -------- 3.36e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.705 0.031 - - 2.11e-02 3.61e-04 98.650 57
CPL 1.056 0.145 81.6 6.9 4.10e-02 6.01e-03 32.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.523 0.073 - - 5.60e-02 2.54e-03 65.190 57
CPL 0.619 0.348 77.9 13.6 1.58e-01 6.43e-02 41.170 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: 30.848000 sec.
T50 in the 50-300 keV band: 12.032000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 53.624 -3.672 49.952
T90 32.872 3.324 36.196
T50 13.008 13.108 26.116
Peak 1.000 20.112 21.112
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
101.1137 -62.0096 0.0032 31.0 178.3 5.3465 59.5 TRIG_00959917
------------------------------------------
Foreground time interval of the image:
-3.672 14.965 (delta_t = 18.637 [sec])
Background time interval of the image:
-239.736 -3.672 (delta_t = 236.064 [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 -3.672 sec. to 49.952 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70492 ( -0.0313042 0.0313025 )
Norm@50keV : 2.10635E-02 ( -0.000360618 0.000360605 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.65 using 59 PHA bins.
# Reduced chi-squared = 1.731 for 57 degrees of freedom
# Null hypothesis probability = 5.155890e-04
Photon flux (15-150 keV) in 53.62 sec: 2.80228 ( -0.0579976 0.0582492 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04531e-05 ( -1.79625e-07 1.79642e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.672 sec. to 49.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05635 ( -0.147469 0.143105 )
Epeak [keV] : 81.6254 ( -5.70112 8.07593 )
Norm@50keV : 4.10158E-02 ( -0.00548467 0.00653544 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.91 using 59 PHA bins.
# Reduced chi-squared = 0.5877 for 56 degrees of freedom
# Null hypothesis probability = 9.941056e-01
Photon flux (15-150 keV) in 53.62 sec: 2.64891 ( -0.06437 0.06483 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00772e-05 ( -1.9759e-07 1.97107e-07 ) ergs/cm2
Band function
Time interval is from -3.672 sec. to 49.952 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.779757 ( -0.328066 0.410521 )
beta : -2.05764 ( -0.761934 0.12655 )
Epeak [keV] : 67.0377 ( -11.0156 16.4041 )
Norm@50keV : 5.81220E-02 ( -0.0189721 0.0413874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 30.08 using 59 PHA bins.
# Reduced chi-squared = 0.5469 for 55 degrees of freedom
# Null hypothesis probability = 9.975177e-01
Photon flux (15-150 keV) in 53.62 sec: 2.61843 ( 4.38157 -0.0706 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00435e-05 ( -1.00431e-05 -1.95713e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.8878 ( )
R^2/D10^2 : 0.238414 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 549.33 using 59 PHA bins.
# Reduced chi-squared = 9.6373 for 57 degrees of freedom
# Null hypothesis probability = 1.173089e-81
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.683e-07 2.520e-08
25- 50 2.795e-06 7.239e-08
50-150 4.918e-06 1.287e-07
15-150 8.381e-06 1.501e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.113 (-10.6062 12.7138)
Norm : 11.4147 (-0.279462 0.280542)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.22 using 59 PHA bins.
# Reduced chi-squared = 0.6881 for 57 degrees of freedom
# Null hypothesis probability = 9.651889e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.561e-06 7.346e-08
25- 50 2.896e-06 1.153e-07
50-150 5.729e-06 1.104e-06
15-150 1.019e-05 1.158e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.23329 (-0.612369 0.640472)
R1^2/D10^2 : 1.58483 (-0.32856 0.452013)
kT2 [keV] : 25.5556 (-1.74147 2.1751)
R2^2/D10^2 : 3.06119E-02 (-0.00863217 0.010394)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.52 using 59 PHA bins.
# Reduced chi-squared = 0.7913 for 55 degrees of freedom
# Null hypothesis probability = 8.678839e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.247e-06 8.097e-08
25- 50 3.011e-06 1.056e-07
50-150 5.659e-06 2.504e-07
15-150 9.917e-06 3.271e-07
Peak spectrum fit
Power-law model
Time interval is from 20.112 sec. to 21.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52343 ( -0.0731129 0.0735549 )
Norm@50keV : 5.60210E-02 ( -0.00254017 0.00253671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.19 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.132524e-01
Photon flux (15-150 keV) in 1 sec: 7.03863 ( -0.323772 0.324102 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.29469e-07 ( -2.57582e-08 2.58302e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.112 sec. to 21.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.618946 ( -0.362262 0.334625 )
Epeak [keV] : 77.8673 ( -9.67956 17.4274 )
Norm@50keV : 0.157804 ( -0.0492977 0.079249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.17 using 59 PHA bins.
# Reduced chi-squared = 0.7352 for 56 degrees of freedom
# Null hypothesis probability = 9.310614e-01
Photon flux (15-150 keV) in 1 sec: 6.79472 ( -0.33485 0.33507 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.03605e-07 ( -2.7814e-08 2.7839e-08 ) ergs/cm2
Band function
Time interval is from 20.112 sec. to 21.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.420861 ( -0.502017 0.889322 )
beta : -2.19130 ( 2.1913 0.371742 )
Epeak [keV] : 69.1840 ( -19.6417 23.948 )
Norm@50keV : 0.205937 ( -0.0935968 0.54143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.73 using 59 PHA bins.
# Reduced chi-squared = 0.7405 for 55 degrees of freedom
# Null hypothesis probability = 9.243907e-01
Photon flux (15-150 keV) in 1 sec: 6.77454 ( 0.22546 -0.33593 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.04262e-07 ( -5.04255e-07 -2.775e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.9969 (-0.75392 0.799706)
R^2/D10^2 : 0.823446 (-0.139951 0.166566)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.76 using 59 PHA bins.
# Reduced chi-squared = 1.8204 for 57 degrees of freedom
# Null hypothesis probability = 1.524762e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.878e-08 2.990e-09
25- 50 1.540e-07 8.100e-09
50-150 2.358e-07 2.040e-08
15-150 4.286e-07 2.225e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-34.1283 -200)
Norm : 28.9544 (-1.28291 1.28291)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9088 for 57 degrees of freedom
# Null hypothesis probability = 6.697991e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.217e-08 3.665e-09
25- 50 1.388e-07 6.750e-09
50-150 3.045e-07 1.470e-08
15-150 5.155e-07 2.375e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.11301 (-1.70311 1.81987)
R1^2/D10^2 : 3.90415 (-1.6059 3.8647)
kT2 [keV] : 23.8554 (-3.78922 6.95172)
R2^2/D10^2 : 0.114687 (-0.07366 0.122242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.48 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 55 degrees of freedom
# Null hypothesis probability = 8.912482e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.856e-08 1.213e-08
25- 50 1.485e-07 2.330e-08
50-150 2.959e-07 7.410e-08
15-150 5.030e-07 9.625e-08
Plot creation:
Sat Mar 7 17:08:22 EST 2020