batgrbproduct analysis for trigger=932595
batgrbproduct Analysis for Trigger=932595
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): Fri Nov 1 20:20:23 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger932595/GCN5_download_cron
======================================================================
Trigger: 00932595 Segment: 000
BAT Trigger Time: 594240258.752 [s; MET]
Trigger Stop: 594240259.776 [s; MET]
UTC: 2019-10-31T18:43:54.909020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 115.862015968424 Dec: -62.3348266050567 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.29
Image Trigger?: NO
Rate S/N Ratio: 11.2249721603218 [ if not an image trigger ]
Image S/N Ratio: 7.29
Flight Position: [ source = BAT ]
RA: 115.862015968424 Dec: -62.3348266050567 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 115.880106951869 Dec: -62.3222505929653 [deg; J2000]
{ 07h 43m 31.2s , -62d 19' 20.1" }
+/- 1.27580049906352 [arcmin] (estimated 90% radius based on SNR)
+/- 0.557468630188549 [arcmin] (formal 1-sigma fit error)
SNR: 21.4783116856017
Angular difference between Flight and Ground position is 0.907451 arcmin
Partial Coding Fraction: 0.2402344 [ including projection effects ]
Duration
T90: 93.2319999933243 +/- 19.031991522175
Measured from: -33.1359997987747
to: 60.0960001945496 [s; relative to TRIGTIME]
T50: 19.472000002861 +/- 2.66350746889609
Measured from: -4.7519998550415
to: 14.7200001478195 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.03600001335144
to: 5.03600001335144 [s; relative to TRIGTIME]
Total Fluence
Measured from: -37.9839999675751
to: 112.65600001812 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.882977 4.050823 3.068940 0.867314
0.131492 0.140412 0.123051 0.099973 [error]
Peak 0.096319 0.208910 0.190363 0.051778
0.017218 0.021021 0.019123 0.012862 [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 1.08e-06 1.87e-06 2.46e-06 6.58e-06 7.19e-06 1.20e-05 erg/cm2
Error 7.91e-08 8.12e-08 1.24e-07 7.30e-07 3.03e-07 8.12e-07 erg/cm2
Peak flux Power-law 1.33e+00 1.49e+00 1.19e+00 1.58e+00 4.60e+00 5.59e+00 ph/cm2/s
Error 2.50e-01 1.83e-01 1.41e-01 3.59e-01 5.15e-01 6.03e-01 ph/cm2/s
Fluence Cutoff-PL 1.04e-06 1.90e-06 2.50e-06 5.04e-06 7.11e-06 1.05e-05 erg/cm2
Error 9.62e-08 9.28e-08 1.37e-07 1.16e-06 3.27e-07 1.73e-06 erg/cm2
Peak flux Cutoff-PL 1.14e+00 1.60e+00 1.33e+00 8.36e-01 4.56e+00 4.90e+00 ph/cm2/s
Error 2.92e-01 2.18e-01 1.84e-01 -------- 5.16e-01 6.76e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.01e+00 1.74e+00 1.26e+00 1.17e+00 4.51e+00 5.18e+00 ph/cm2/s
Error 3.50e-01 -------- 1.82e-01 -------- 5.23e-01 6.63e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.603 0.071 - - 5.11e-03 2.04e-04 56.860 57
CPL 1.415 0.254 162.9 -47.3 6.30e-03 1.81e-03 55.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.324 0.160 - - 3.84e-02 4.10e-03 51.560 57
CPL 0.555 0.702 104.1 118.1 8.89e-02 7.79e-02 47.200 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: 52.224000 sec.
T50 in the 50-300 keV band: 17.408000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 150.640 -37.984 112.656
T90 93.232 -33.136 60.096
T50 19.472 -4.752 14.720
Peak 1.000 4.036 5.036
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
115.8801 -62.3223 0.0090 42.6 -140.3 7.4149 21.5 TRIG_00932595
------------------------------------------
Foreground time interval of the image:
-37.984 9.549 (delta_t = 47.533 [sec])
Background time interval of the image:
-60.752 -37.984 (delta_t = 22.768 [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 -37.984 sec. to 112.656 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60322 ( -0.0713502 0.0715411 )
Norm@50keV : 5.10694E-03 ( -0.000204512 0.000204244 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.86 using 59 PHA bins.
# Reduced chi-squared = 0.9975 for 57 degrees of freedom
# Null hypothesis probability = 4.803006e-01
Photon flux (15-150 keV) in 150.6 sec: 0.656912 ( -0.0281641 0.0282556 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18998e-06 ( -3.0226e-07 3.0282e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -37.984 sec. to 112.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41501 ( -0.285904 0.221179 )
Epeak [keV] : 162.899 ( -68.2965 -162.915 )
Norm@50keV : 6.30076E-03 ( -0.001321 0.00229446 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.45 using 59 PHA bins.
# Reduced chi-squared = 0.9902 for 56 degrees of freedom
# Null hypothesis probability = 4.955433e-01
Photon flux (15-150 keV) in 150.6 sec: 0.649762 ( -0.029833 0.0299 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.10915e-06 ( -3.27404e-07 3.25778e-07 ) ergs/cm2
Band function
Time interval is from -37.984 sec. to 112.656 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.866452 ( -2.8876 -0.878214 )
beta : -1.66413 ( -0.0992142 0.0889642 )
Epeak [keV] : 31.2719 ( -12.7735 25.627 )
Norm@50keV : 0.292942 ( -0.318193 212.055 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9554 for 55 degrees of freedom
# Null hypothesis probability = 5.688133e-01
Photon flux (15-150 keV) in 150.6 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] : 15.2146 ( )
R^2/D10^2 : 6.75289E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 211.27 using 59 PHA bins.
# Reduced chi-squared = 3.7065 for 57 degrees of freedom
# Null hypothesis probability = 1.406369e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.917e-07 3.968e-08
25- 50 1.979e-06 1.167e-07
50-150 3.137e-06 2.357e-07
15-150 5.608e-06 2.658e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 187.861 (-37.383 -189.846)
Norm : 2.65540 (-0.115185 0.127336)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.08 using 59 PHA bins.
# Reduced chi-squared = 0.9838 for 57 degrees of freedom
# Null hypothesis probability = 5.097172e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.003e-06 6.574e-08
25- 50 1.916e-06 1.852e-07
50-150 4.119e-06 1.161e-06
15-150 7.039e-06 1.363e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.23676 (-0.897709 0.998424)
R1^2/D10^2 : 0.647154 (-0.228094 0.385955)
kT2 [keV] : 27.4723 (-3.54418 5.23335)
R2^2/D10^2 : 6.43614E-03 (-0.00297077 0.0043236)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.27 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.272165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.683e-07 1.114e-07
25- 50 1.953e-06 1.815e-07
50-150 4.162e-06 5.391e-07
15-150 7.083e-06 7.952e-07
Peak spectrum fit
Power-law model
Time interval is from 4.036 sec. to 5.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.32417 ( -0.160742 0.159658 )
Norm@50keV : 3.83544E-02 ( -0.00409776 0.00409747 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.56 using 59 PHA bins.
# Reduced chi-squared = 0.9045 for 57 degrees of freedom
# Null hypothesis probability = 6.786234e-01
Photon flux (15-150 keV) in 1 sec: 4.59679 ( -0.514165 0.515085 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.76824e-07 ( -4.2278e-08 4.23445e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.036 sec. to 5.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.555438 ( -0.764522 0.638766 )
Epeak [keV] : 104.122 ( -28.8568 207.438 )
Norm@50keV : 8.89043E-02 ( -0.0439497 0.111792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.20 using 59 PHA bins.
# Reduced chi-squared = 0.8428 for 56 degrees of freedom
# Null hypothesis probability = 7.927440e-01
Photon flux (15-150 keV) in 1 sec: 4.55627 ( -0.51595 0.51691 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.73775e-07 ( -4.3883e-08 4.3525e-08 ) ergs/cm2
Band function
Time interval is from 4.036 sec. to 5.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.358678 ( -1.35567 -0.378977 )
beta : -1.74679 ( 1.74549 0.37926 )
Epeak [keV] : 62.4319 ( -28.6439 100.766 )
Norm@50keV : 0.308419 ( -0.340254 203.814 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.69 using 59 PHA bins.
# Reduced chi-squared = 0.8307 for 55 degrees of freedom
# Null hypothesis probability = 8.102597e-01
Photon flux (15-150 keV) in 1 sec: 4.50798 ( 2.49202 -0.52353 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.71472e-07 ( -3.71465e-07 -4.3082e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.4353 (-2.13998 2.55974)
R^2/D10^2 : 0.346199 (-0.132225 0.199956)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.22 using 59 PHA bins.
# Reduced chi-squared = 1.074 for 57 degrees of freedom
# Null hypothesis probability = 3.269764e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.128e-08 4.710e-09
25- 50 9.605e-08 1.531e-08
50-150 2.101e-07 3.870e-08
15-150 3.274e-07 4.375e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.1834 -200)
Norm : 19.4868 (-2.09775 2.09775)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 59 PHA bins.
# Reduced chi-squared = 0.9683 for 57 degrees of freedom
# Null hypothesis probability = 5.432475e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.852e-08 9.000e-09
25- 50 9.333e-08 3.589e-08
50-150 2.047e-07 9.359e-08
15-150 3.465e-07 1.674e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.4654 (-2.9622 3.32821)
R1^2/D10^2 : 1.27376 (-0.674852 1.94253)
kT2 [keV] : 35.3732 (-11.1163 56.8656)
R2^2/D10^2 : 2.09684E-02 (-0.0194146 0.0671014)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.09 using 59 PHA bins.
# Reduced chi-squared = 0.8198 for 55 degrees of freedom
# Null hypothesis probability = 8.274028e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.250e-08 1.556e-08
25- 50 1.005e-07 4.368e-08
50-150 2.423e-07 1.211e-07
15-150 3.753e-07 1.797e-07
Plot creation:
Fri Nov 1 20:24:08 EDT 2019