batgrbproduct analysis for trigger=1114937
batgrbproduct Analysis for Trigger=1114937
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 v2.48
Process Start Time (local time): Thu Jul 7 15:52:24 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1114937/GCN5_download_cron
======================================================================
Trigger: 01114937 Segment: 000
BAT Trigger Time: 678816583.744 [s; MET]
Trigger Stop: 678816585.792 [s; MET]
UTC: 2022-07-06T16:09:14.296300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 0.586794992558329 Dec: -16.3913692713963 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.84
Image Trigger?: NO
Rate S/N Ratio: 11.6189500386223 [ if not an image trigger ]
Image S/N Ratio: 8.84
Flight Position: [ source = BAT ]
RA: 0.586794992558329 Dec: -16.3913692713963 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 0.577112568072369 Dec: -16.410768801105 [deg; J2000]
{ 00h 02m 18.5s , -16d 24' 38.8" }
+/- 1.82650061130474 [arcmin] (estimated 90% radius based on SNR)
+/- 0.707556623744499 [arcmin] (formal 1-sigma fit error)
SNR: 12.8639924724808
Angular difference between Flight and Ground position is 1.290512 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 86.9079998731613 +/- 17.9923081333013
Measured from: -56.4799997806549
to: 30.4280000925064 [s; relative to TRIGTIME]
T50: 15.7359999418259 +/- 10.194905577293
Measured from: -3.45599985122681
to: 12.2800000905991 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.72400009632111
to: 4.72400009632111 [s; relative to TRIGTIME]
Total Fluence
Measured from: -71.8399999141693
to: 36.1480000019073 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.788917 0.923984 0.538644 0.224963
0.067787 0.070074 0.062472 0.058550 [error]
Peak 0.029670 0.050892 0.025709 0.013121
0.006965 0.007326 0.006414 0.005811 [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 2.36e-07 3.73e-07 4.44e-07 1.03e-06 1.35e-06 2.08e-06 erg/cm2
Error 3.34e-08 3.28e-08 6.33e-08 3.07e-07 1.44e-07 3.64e-07 erg/cm2
Peak flux Power-law 3.24e-01 3.02e-01 1.95e-01 1.94e-01 9.02e-01 1.02e+00 ph/cm2/s
Error 9.62e-02 5.74e-02 5.39e-02 1.08e-01 1.69e-01 1.98e-01 ph/cm2/s
Fluence Cutoff-PL 2.36e-07 3.73e-07 4.44e-07 1.02e-06 1.35e-06 2.07e-06 erg/cm2
Error 3.39e-08 3.27e-08 6.23e-08 3.94e-07 1.47e-07 5.00e-07 erg/cm2
Peak flux Cutoff-PL 3.28e-01 3.03e-01 1.93e-01 1.88e-01 9.02e-01 1.02e+00 ph/cm2/s
Error 9.63e-02 5.70e-02 4.06e-02 1.60e-01 1.69e-01 1.69e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.41e-01 3.42e-01 1.93e-01 8.12e-02 9.27e-01 9.57e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.85e-01 2.12e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.749 0.173 - - 1.35e-03 1.38e-04 42.190 57
CPL 1.749 0.348 9999.2 -0.0 1.35e-03 1.06e-03 42.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.631 0.346 - - 6.95e-03 1.47e-03 69.000 57
CPL 1.639 0.371 9999.3 -0.0 6.92e-03 1.61e-02 69.010 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: 22.272000 sec.
T50 in the 50-300 keV band: 10.816000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 107.988 -71.840 36.148
T90 86.908 -56.480 30.428
T50 15.736 -3.456 12.280
Peak 1.000 3.724 4.724
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
0.5771 -16.4108 0.0149 21.2 123.7 2.2371 12.9 TRIG_01114937
------------------------------------------
Foreground time interval of the image:
-66.543 27.757 (delta_t = 94.300 [sec])
Background time interval of the image:
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 -71.840 sec. to 36.148 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74944 ( -0.170462 0.175625 )
Norm@50keV : 1.35484E-03 ( -0.000139132 0.000136385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.19 using 59 PHA bins.
# Reduced chi-squared = 0.7402 for 57 degrees of freedom
# Null hypothesis probability = 9.285579e-01
Photon flux (15-150 keV) in 108 sec: 0.183159 ( -0.0162139 0.0162282 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.35022e-06 ( -1.43008e-07 1.45555e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -71.840 sec. to 36.148 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74935 ( -0.521106 0.175686 )
Epeak [keV] : 9999.25 ( -9999.35 -9999.36 )
Norm@50keV : 1.35420E-03 ( -0.000915771 0.00121071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.20 using 59 PHA bins.
# Reduced chi-squared = 0.7535 for 56 degrees of freedom
# Null hypothesis probability = 9.139571e-01
Photon flux (15-150 keV) in 108 sec: 0.183141 ( -0.016285 0.016166 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34991e-06 ( -1.51481e-07 1.42711e-07 ) ergs/cm2
Band function
Time interval is from -71.840 sec. to 36.148 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.82168 ( 5.95577 6.82168 )
beta : -1.74944 ( -0.175625 0.170462 )
Epeak [keV] : 89.6216 ( -89.6216 -89.6216 )
Norm@50keV : 0.184142 ( -0.01891 0.0185366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.19 using 59 PHA bins.
# Reduced chi-squared = 0.7672 for 55 degrees of freedom
# Null hypothesis probability = 8.972881e-01
Photon flux (15-150 keV) in 108 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] : 11.3740 (-1.25547 1.46504)
R^2/D10^2 : 5.19277E-02 (-0.0186967 0.0283049)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.69 using 59 PHA bins.
# Reduced chi-squared = 1.345 for 57 degrees of freedom
# Null hypothesis probability = 4.204349e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.525e-07 2.603e-08
25- 50 4.498e-07 4.919e-08
50-150 3.370e-07 7.538e-08
15-150 9.393e-07 1.045e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 116.604 (-37.6604 79.4596)
Norm : 0.776756 (-0.0878091 0.108244)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.187e-07 2.776e-08
25- 50 3.894e-07 5.065e-08
50-150 6.850e-07 2.993e-07
15-150 1.293e-06 3.224e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.46623 (-1.93186 1.75433)
R1^2/D10^2 : 0.192605 (-0.0969284 0.335334)
kT2 [keV] : 34.8375 (-14.1936 84.1172)
R2^2/D10^2 : 7.38756E-04 (-0.000664797 0.00363554)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.120e-07 6.322e-08
25- 50 3.964e-07 1.061e-07
50-150 7.790e-07 3.831e-07
15-150 1.387e-06 5.060e-07
Peak spectrum fit
Power-law model
Time interval is from 3.724 sec. to 4.724 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63091 ( -0.340799 0.35183 )
Norm@50keV : 6.95223E-03 ( -0.00149044 0.00144163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.00 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.324065e-01
Photon flux (15-150 keV) in 1 sec: 0.902159 ( -0.169363 0.169411 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47866e-08 ( -1.45678e-08 1.5068e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.724 sec. to 4.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63935 ( -0.395118 0.346437 )
Epeak [keV] : 9999.34 ( -9999.35 -9999.36 )
Norm@50keV : 6.92046E-03 ( -0.00148775 0.0307394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.01 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 56 degrees of freedom
# Null hypothesis probability = 1.137204e-01
Photon flux (15-150 keV) in 1 sec: 0.902405 ( -0.169862 0.168965 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.48083e-08 ( -1.63612e-08 1.47528e-08 ) ergs/cm2
Band function
Time interval is from 3.724 sec. to 4.724 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.74318 ( -4.74318 -4.74318 )
beta : -2.10376 ( -0.83356 0.549391 )
Epeak [keV] : 29.9807 ( -6.58893 6.08737 )
Norm@50keV : 201.788 ( -37.2889 4.65356e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.95 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 55 degrees of freedom
# Null hypothesis probability = 1.295241e-01
Photon flux (15-150 keV) in 1 sec: 0.927403 ( 6.0726 -0.202088 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.8085e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.64097 (-1.80555 2.53572)
R^2/D10^2 : 0.489977 (-0.286903 0.580764)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.151e-09 3.142e-09
25- 50 2.159e-08 6.765e-09
50-150 1.012e-08 5.444e-09
15-150 4.086e-08 1.308e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 160.199 (-96.5318 -158.731)
Norm : 3.69743 (-0.72966 1.14146)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.440e-09 5.430e-09
25- 50 1.766e-08 9.835e-09
50-150 3.580e-08 2.181e-08
15-150 6.290e-08 3.724e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.06037 (-1.45664 1.67979)
R1^2/D10^2 : 0.857511 (-0.462303 0.979242)
kT2 [keV] : 198.684 (-198.869 -198.87)
R2^2/D10^2 : 1.33747E-04 (-5.85807e-05 0.00313287)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.030e-08 5.493e-09
25- 50 1.941e-08 9.348e-09
50-150 4.009e-08 9.020e-09
15-150 6.980e-08 2.452e-08
Plot creation:
Thu Jul 7 15:56:11 EDT 2022