batgrbproduct analysis for trigger=903357
batgrbproduct Analysis for Trigger=903357
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 May 13 15:00:17 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger903357/GCN5_download_cron
======================================================================
Trigger: 00903357 Segment: 000
BAT Trigger Time: 579364832 [s; MET]
Trigger Stop: 579364896 [s; MET]
UTC: 2019-05-12T14:40:09.107780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 82.4400244290381 Dec: -7.57402254090285 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.64
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.64
Flight Position: [ source = BAT ]
RA: 82.4400244290381 Dec: -7.57402254090285 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 82.4020364599815 Dec: -7.582260474164 [deg; J2000]
{ 05h 29m 36.5s , -07d 34' 56.1" }
+/- 2.87083915888408 [arcmin] (estimated 90% radius based on SNR)
+/- 1.7427207611136 [arcmin] (formal 1-sigma fit error)
SNR: 6.74248527170562
Angular difference between Flight and Ground position is 2.312805 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 40.0999999046326 +/- 11.2772876710584
Measured from: -8.1839998960495
to: 31.9160000085831 [s; relative to TRIGTIME]
T50: 15.4879999160767 +/- 2.60958237315422
Measured from: -2.7079998254776
to: 12.7800000905991 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -2.78400003910065
to: -1.78400003910065 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.70000004768372
to: 43.3079999685287 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.972238 0.976754 0.434621 0.096280
0.059351 0.061465 0.052526 0.043819 [error]
Peak 0.032488 0.043119 0.032897 0.023406
0.008333 0.008755 0.007332 0.006437 [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 3.05e-07 3.97e-07 3.79e-07 6.41e-07 1.29e-06 1.72e-06 erg/cm2
Error 3.22e-08 2.95e-08 5.05e-08 1.68e-07 1.15e-07 2.24e-07 erg/cm2
Peak flux Power-law 3.18e-01 3.29e-01 2.41e-01 2.83e-01 9.98e-01 1.17e+00 ph/cm2/s
Error 1.09e-01 7.02e-02 6.17e-02 1.50e-01 2.01e-01 2.40e-01 ph/cm2/s
Fluence Cutoff-PL 2.92e-07 4.22e-07 3.64e-07 2.47e-07 1.22e-06 1.33e-06 erg/cm2
Error 3.56e-08 4.09e-08 5.95e-08 2.82e-07 1.39e-07 3.48e-07 erg/cm2
Peak flux Cutoff-PL 3.19e-01 3.30e-01 2.40e-01 2.79e-01 9.98e-01 1.17e+00 ph/cm2/s
Error 5.97e-02 7.88e-02 6.54e-02 2.27e-01 2.01e-01 2.85e-01 ph/cm2/s
Fluence Band 2.83e-07 4.28e-07 3.50e-07 4.67e-07 1.24e-06 1.53e-06 erg/cm2
Error 3.73e-08 -------- 5.82e-08 -------- -------- -------- 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 2.067 0.145 - - 2.63e-03 2.53e-04 51.070 57
CPL 1.532 0.653 35.5 0.0 5.42e-03 0.00e+00 48.740 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.452 0.352 - - 8.09e-03 1.66e-03 32.610 57
CPL 1.455 0.383 9999.4 0.0 8.10e-03 2.38e-02 32.610 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: 9.280000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 53.008 -9.700 43.308
T90 40.100 -8.184 31.916
T50 15.488 -2.708 12.780
Peak 1.000 -2.784 -1.784
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
82.4020 -7.5823 0.0287 22.1 -49.8 1.9501 6.7 TRIG_00903357
------------------------------------------
Foreground time interval of the image:
-9.700 43.308 (delta_t = 53.008 [sec])
Background time interval of the image:
-17.899 -9.700 (delta_t = 8.199 [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 -9.700 sec. to 43.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06734 ( -0.142005 0.147942 )
Norm@50keV : 2.63438E-03 ( -0.000254888 0.000250673 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.07 using 59 PHA bins.
# Reduced chi-squared = 0.8959 for 57 degrees of freedom
# Null hypothesis probability = 6.960440e-01
Photon flux (15-150 keV) in 53.01 sec: 0.407898 ( -0.0302149 0.0302277 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29368e-06 ( -1.13863e-07 1.1572e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.700 sec. to 43.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53247 ( -0.713269 0.592772 )
Epeak [keV] : 35.4612 ( )
Norm@50keV : 5.42135E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.74 using 59 PHA bins.
# Reduced chi-squared = 0.8704 for 56 degrees of freedom
# Null hypothesis probability = 7.435662e-01
Photon flux (15-150 keV) in 53.01 sec: 0.398483 ( -0.031897 0.031882 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.21865e-06 ( -1.35981e-07 1.41473e-07 ) ergs/cm2
Band function
Time interval is from -9.700 sec. to 43.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.76121E-02 ( -1.22538 0.675113 )
beta : -2.31493 ( 2.31154 0.270013 )
Epeak [keV] : 29.0208 ( -9.07487 13.1596 )
Norm@50keV : 7.25405E-02 ( -0.0708384 222.55 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
# Reduced chi-squared = 0.8531 for 55 degrees of freedom
# Null hypothesis probability = 7.726225e-01
Photon flux (15-150 keV) in 53.01 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.23679e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.21917 (-0.783465 0.864724)
R^2/D10^2 : 0.253826 (-0.0752376 0.106101)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.18 using 59 PHA bins.
# Reduced chi-squared = 1.372 for 57 degrees of freedom
# Null hypothesis probability = 3.281067e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.253e-07 2.812e-08
25- 50 4.971e-07 4.251e-08
50-150 2.040e-07 4.633e-08
15-150 9.265e-07 8.455e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.3753 (-11.9752 16.5889)
Norm : 2.15077 (-0.271686 0.3005)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.95 using 59 PHA bins.
# Reduced chi-squared = 0.8587 for 57 degrees of freedom
# Null hypothesis probability = 7.671720e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.852e-07 3.045e-08
25- 50 4.304e-07 3.451e-08
50-150 4.786e-07 9.733e-08
15-150 1.194e-06 1.068e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.38950 (-1.29106 1.23664)
R1^2/D10^2 : 0.815282 (-0.368473 0.493883)
kT2 [keV] : 21.7950 (-6.46179 14.6037)
R2^2/D10^2 : 5.58834E-03 (-0.00468648 0.0121853)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.62 using 59 PHA bins.
# Reduced chi-squared = 0.8657 for 55 degrees of freedom
# Null hypothesis probability = 7.498478e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.814e-07 7.011e-08
25- 50 4.285e-07 1.032e-07
50-150 5.222e-07 2.755e-07
15-150 1.232e-06 4.175e-07
Peak spectrum fit
Power-law model
Time interval is from -2.784 sec. to -1.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45176 ( -0.350138 0.354211 )
Norm@50keV : 8.09198E-03 ( -0.00166896 0.00164758 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.61 using 59 PHA bins.
# Reduced chi-squared = 0.5722 for 57 degrees of freedom
# Null hypothesis probability = 9.961194e-01
Photon flux (15-150 keV) in 1 sec: 0.997660 ( -0.201233 0.201572 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.74093e-08 ( -1.74799e-08 1.77822e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.784 sec. to -1.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45470 ( -0.412819 0.353268 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 8.10265E-03 ( -0.00167141 0.0460145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.61 using 59 PHA bins.
# Reduced chi-squared = 0.5824 for 56 degrees of freedom
# Null hypothesis probability = 9.947500e-01
Photon flux (15-150 keV) in 1 sec: 0.997805 ( -0.201593 0.201005 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.73677e-08 ( -1.72533e-08 1.76883e-08 ) ergs/cm2
Band function
Time interval is from -2.784 sec. to -1.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12710 ( 1.12421 5.72834 )
beta : -1.54554 ( 1.56082 0.457774 )
Epeak [keV] : 111.104 ( -119.236 -119.236 )
Norm@50keV : 1.23880E-02 ( -0.00542552 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.59 using 59 PHA bins.
# Reduced chi-squared = 0.5926 for 55 degrees of freedom
# Null hypothesis probability = 9.930146e-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] : 14.6504 (-3.20674 4.54713)
R^2/D10^2 : 0.124847 (-0.0768335 0.172686)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.85 using 59 PHA bins.
# Reduced chi-squared = 0.6816 for 57 degrees of freedom
# Null hypothesis probability = 9.684967e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.630e-09 2.340e-09
25- 50 2.188e-08 7.320e-09
50-150 3.162e-08 1.316e-08
15-150 5.914e-08 1.999e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-103.281 -199.363)
Norm : 4.09856 (-0.81598 0.815993)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.99 using 59 PHA bins.
# Reduced chi-squared = 0.5789 for 57 degrees of freedom
# Null hypothesis probability = 9.954754e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.021e-08 6.055e-09
25- 50 1.963e-08 1.149e-08
50-150 4.306e-08 2.448e-08
15-150 7.290e-08 4.217e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.9853 (-8.33297 4.02094)
R1^2/D10^2 : 0.290094 (-0.184889 261.681)
kT2 [keV] : 198.201 (-198.377 -198.377)
R2^2/D10^2 : 1.24477E-04 (-8.40463e-05 0.110812)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.19 using 59 PHA bins.
#Fit statistic : Chi-Squared = 33.16 using 59 PHA bins.
# Reduced chi-squared = 0.6035 for 55 degrees of freedom
# Reduced chi-squared = 0.6029 for 55 degrees of freedom
# Null hypothesis probability = 9.912763e-01
# Null hypothesis probability = 9.913795e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.787e-09 4.577e-09
25- 50 2.172e-08 1.272e-08
50-150 4.816e-08 2.578e-08
15-150 7.767e-08 3.889e-08
Plot creation:
Mon May 13 15:04:01 EDT 2019