batgrbproduct analysis for trigger=741220
batgrbproduct Analysis for Trigger=741220
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): Mon Mar 6 17:51:32 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger741220_copy/GCN5_download_cron
======================================================================
Trigger: 00741220 Segment: 000
BAT Trigger Time: 510476791.232 [s; MET]
Trigger Stop: 510476799.424 [s; MET]
UTC: 2017-03-06T07:06:12.520600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 263.081790843115 Dec: -44.747485901374 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.15
Image Trigger?: NO
Rate S/N Ratio: 7.41619848709566 [ if not an image trigger ]
Image S/N Ratio: 7.15
Flight Position: [ source = BAT ]
RA: 263.081790843115 Dec: -44.747485901374 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 263.135417524543 Dec: -44.7635363388596 [deg; J2000]
{ 17h 32m 32.5s , -44d 45' 48.7" }
+/- 3.7762446617465 [arcmin] (estimated 90% radius based on SNR)
+/- 2.70728429001974 [arcmin] (formal 1-sigma fit error)
SNR: 4.55771089768068
Angular difference between Flight and Ground position is 2.479531 arcmin
Partial Coding Fraction: 0.2929688 [ including projection effects ]
Duration
T90: 114.035999953747 +/- 9.35462494677846
Measured from: -96.5959998965263
to: 17.4400000572205 [s; relative to TRIGTIME]
T50: 95.2559999227524 +/- 86.5307103587395
Measured from: -86.459999859333
to: 8.79600006341934 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.24800002574921
to: 2.24800002574921 [s; relative to TRIGTIME]
Total Fluence
Measured from: -100.579999983311
to: 19.283999979496 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.550069 0.715974 0.455796 0.134247
0.155729 0.147435 0.122669 0.100443 [error]
Peak 0.050532 0.038507 0.023097 0.010639
0.014112 0.014345 0.011173 0.009527 [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 2.48e-07 3.37e-07 3.38e-07 6.12e-07 1.12e-06 1.54e-06 erg/cm2
Error 8.27e-08 7.52e-08 1.20e-07 4.47e-07 2.82e-07 5.70e-07 erg/cm2
Peak flux Power-law 4.82e-01 3.38e-01 1.56e-01 1.00e-01 1.02e+00 1.08e+00 ph/cm2/s
Error 2.43e-01 1.24e-01 8.72e-02 1.19e-01 3.82e-01 3.96e-01 ph/cm2/s
Fluence Cutoff-PL 2.36e-07 3.53e-07 3.42e-07 3.39e-07 1.09e-06 1.27e-06 erg/cm2
Error 9.34e-08 9.37e-08 1.31e-07 3.79e-07 2.99e-07 6.53e-07 erg/cm2
Peak flux Cutoff-PL 4.18e-01 3.90e-01 1.65e-01 3.15e-02 9.98e-01 1.00e+00 ph/cm2/s
Error 2.73e-01 1.67e-01 1.37e-01 1.06e-01 3.83e-01 3.95e-01 ph/cm2/s
Fluence Band 2.31e-07 3.54e-07 3.43e-07 3.05e-07 1.09e-06 1.24e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 4.36e-01 3.73e-01 1.69e-01 5.23e-02 1.01e+00 1.03e+00 ph/cm2/s
Error -------- -------- -------- -------- 3.89e-01 4.04e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.997 0.421 - - 1.01e-03 2.67e-04 57.130 57
CPL 1.605 1.226 46.5 0.0 1.65e-03 0.00e+00 56.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.116 0.665 - - 6.46e-03 2.89e-03 81.600 57
CPL 0.902 3.059 40.5 0.0 3.05e-02 0.00e+00 80.820 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 119.864 -100.580 19.284
T90 114.036 -96.596 17.440
T50 95.256 -86.460 8.796
Peak 1.000 1.248 2.248
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
263.1354 -44.7635 0.0420 45.8 13.7 1.9096 4.6 TRIG_00741220
------------------------------------------
Foreground time interval of the image:
-100.580 19.284 (delta_t = 119.864 [sec])
Background time interval of the image:
-179.031 -100.580 (delta_t = 78.451 [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 -100.580 sec. to 19.284 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.99685 ( -0.398179 0.444133 )
Norm@50keV : 1.01369E-03 ( -0.00027392 0.000261037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.13 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 57 degrees of freedom
# Null hypothesis probability = 4.704121e-01
Photon flux (15-150 keV) in 119.9 sec: 0.151834 ( -0.0346498 0.0348075 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12065e-06 ( -2.78661e-07 2.85041e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -100.580 sec. to 19.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60467 ( -1.89894 0.553171 )
Epeak [keV] : 46.5096 ( )
Norm@50keV : 1.65212E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.92 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 56 degrees of freedom
# Null hypothesis probability = 4.407900e-01
Photon flux (15-150 keV) in 119.9 sec: 0.149450 ( -0.035771 0.035748 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09236e-06 ( -2.94768e-07 3.02357e-07 ) ergs/cm2
Band function
Time interval is from -100.580 sec. to 19.284 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.60387 ( -0.339721 1.90875 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 46.4790 ( -29.1911 -46.479 )
Norm@50keV : 1.65369E-03 ( -0.000857423 0.0163399 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.92 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.036323e-01
Photon flux (15-150 keV) in 119.9 sec: 0.149782 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08514e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0125 (-3.0605 4.14506)
R^2/D10^2 : 4.78414E-02 (-0.033418 0.119076)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.68 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.819388e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.454e-07 7.208e-08
25- 50 4.117e-07 2.211e-07
50-150 2.823e-07 1.580e-07
15-150 8.394e-07 4.133e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.2053 (-35.5234 114.71)
Norm : 0.725727 (-0.22345 0.33982)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.02 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.744323e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.245e-07 7.877e-08
25- 50 3.627e-07 1.614e-07
50-150 4.861e-07 3.446e-07
15-150 1.073e-06 4.343e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.53216 (-3.34291 3.82791)
R1^2/D10^2 : 0.472448 (-0.402551 48.0661)
kT2 [keV] : 19.8287 (-7.93096 31.833)
R2^2/D10^2 : 3.81148E-03 (-0.00368681 0.0279529)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.134827e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-07 1.430e-07
25- 50 3.409e-07 1.844e-07
50-150 5.120e-07 3.223e-07
15-150 1.091e-06 5.541e-07
Peak spectrum fit
Power-law model
Time interval is from 1.248 sec. to 2.248 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11643 ( -0.594222 0.735673 )
Norm@50keV : 6.45762E-03 ( -0.00297198 0.00280157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.60 using 59 PHA bins.
# Reduced chi-squared = 1.432 for 57 degrees of freedom
# Null hypothesis probability = 1.797043e-02
Photon flux (15-150 keV) in 1 sec: 1.02423 ( -0.381056 0.382381 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0101e-08 ( -2.4139e-08 2.50327e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.248 sec. to 2.248 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.902063 ( -4.88522 1.23323 )
Epeak [keV] : 40.4893 ( )
Norm@50keV : 3.04812E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.82 using 59 PHA bins.
# Reduced chi-squared = 1.443 for 56 degrees of freedom
# Null hypothesis probability = 1.664882e-02
Photon flux (15-150 keV) in 1 sec: 0.998265 ( -0.381382 0.384475 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.73636e-08 ( -2.3596e-08 2.54702e-08 ) ergs/cm2
Band function
Time interval is from 1.248 sec. to 2.248 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.878352 ( -1.56272 5.4073 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 40.5057 ( -27.6723 -40.5288 )
Norm@50keV : 3.14546E-02 ( -0.031406 22.966 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.82 using 59 PHA bins.
# Reduced chi-squared = 1.469 for 55 degrees of freedom
# Null hypothesis probability = 1.328017e-02
Photon flux (15-150 keV) in 1 sec: 1.01468 ( 5.98532 -0.404078 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.78282e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.4135 (-3.74539 5.56847)
R^2/D10^2 : 0.422695 (-0.421711 1.91431)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.07 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 57 degrees of freedom
# Null hypothesis probability = 1.650759e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.453e-09 6.105e-09
25- 50 2.486e-08 1.653e-08
50-150 1.457e-08 1.066e-08
15-150 4.889e-08 3.174e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.1954 (-34.4812 -59.1928)
Norm : 5.50210 (-2.53313 4.85367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.89 using 59 PHA bins.
# Reduced chi-squared = 1.419 for 57 degrees of freedom
# Null hypothesis probability = 2.042074e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.380e-08 9.460e-09
25- 50 2.091e-08 1.325e-08
50-150 2.353e-08 1.957e-08
15-150 5.824e-08 3.915e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.69513 (-4.78424 175.809)
R1^2/D10^2 : 5.27313 (-4.90878 -4.90878)
kT2 [keV] : 15.1082 (-15.505 -15.505)
R2^2/D10^2 : 7.46832E-02 (-0.0673301 1.29521)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.75 using 59 PHA bins.
# Reduced chi-squared = 1.468 for 55 degrees of freedom
# Null hypothesis probability = 1.344643e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.347e-08 8.600e-09
25- 50 1.978e-08 1.131e-08
50-150 2.238e-08 1.710e-08
15-150 5.563e-08 3.045e-08
Plot creation:
Mon Mar 6 18:14:22 EST 2017