batgrbproduct analysis for trigger=804999
batgrbproduct Analysis for Trigger=804999
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): Sun Jan 14 04:35:12 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger804999/GCN5_download_cron
======================================================================
Trigger: 00804999 Segment: 000
BAT Trigger Time: 537504446.976 [s; MET]
Trigger Stop: 537504448 [s; MET]
UTC: 2018-01-13T02:47:06.667980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 19.2146943402261 Dec: 68.6820023929715 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.3
Image Trigger?: NO
Rate S/N Ratio: 87.5499857224432 [ if not an image trigger ]
Image S/N Ratio: 20.3
Flight Position: [ source = BAT ]
RA: 19.2146943402261 Dec: 68.6820023929715 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 19.2111225914476 Dec: 68.6822081577435 [deg; J2000]
{ 01h 16m 50.7s , +68d 40' 55.9" }
+/- 0.866665946409601 [arcmin] (estimated 90% radius based on SNR)
+/- 0.298432600373072 [arcmin] (formal 1-sigma fit error)
SNR: 37.3165615231154
Angular difference between Flight and Ground position is 0.078881 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 64 +/- 16
Measured from: -12.9759998321533
to: 51.0240001678467 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: -12.9759998321533
to: 3.02400016784668 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.5240000486374
to: 11.5240000486374 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.9759999513626
to: 67.0240000486374 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.328866 2.257290 2.356782 0.761643
0.061234 0.064740 0.057854 0.049797 [error]
Peak 0.055160 0.101555 0.126122 0.037367
0.007387 0.008486 0.008222 0.006280 [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 3.96e-07 9.43e-07 1.78e-06 8.21e-06 4.84e-06 1.13e-05 erg/cm2
Error 2.70e-08 3.73e-08 5.80e-08 6.48e-07 1.51e-07 6.67e-07 erg/cm2
Peak flux Power-law 5.40e-01 7.45e-01 7.60e-01 1.41e+00 2.50e+00 3.46e+00 ph/cm2/s
Error 8.63e-02 7.33e-02 6.34e-02 2.51e-01 2.00e-01 2.97e-01 ph/cm2/s
Fluence Cutoff-PL 3.81e-07 9.47e-07 1.81e-06 7.00e-06 4.81e-06 1.01e-05 erg/cm2
Error 3.60e-08 3.83e-08 7.14e-08 1.59e-06 1.59e-07 1.29e-06 erg/cm2
Peak flux Cutoff-PL 4.50e-01 7.70e-01 8.24e-01 7.76e-01 2.44e+00 2.82e+00 ph/cm2/s
Error 1.09e-01 8.14e-02 8.26e-02 3.83e-01 2.07e-01 4.33e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.079 0.057 - - 5.74e-03 1.77e-04 58.190 57
CPL 0.951 0.199 494.6 0.0 6.50e-03 1.19e-03 57.190 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.972 0.132 - - 2.17e-02 1.72e-03 49.380 57
CPL 0.296 0.596 146.6 191.0 4.31e-02 2.74e-02 44.880 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: 11.456000 sec.
T50 in the 50-300 keV band: 6.912000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.000 -12.976 67.024
T90 64.000 -12.976 51.024
T50 16.000 -12.976 3.024
Peak 1.000 10.524 11.524
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
19.2111 +68.6822 0.0052 27.1 27.8 6.9660 37.3 TRIG_00804999
------------------------------------------
Foreground time interval of the image:
-12.976 67.024 (delta_t = 80.000 [sec])
Background time interval of the image:
-60.976 -12.976 (delta_t = 48.000 [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 -12.976 sec. to 67.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07939 ( -0.0571898 0.0567088 )
Norm@50keV : 5.74338E-03 ( -0.000177697 0.000177007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 57 degrees of freedom
# Null hypothesis probability = 4.313837e-01
Photon flux (15-150 keV) in 80 sec: 0.664925 ( -0.0216372 0.0217276 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.83595e-06 ( -1.51327e-07 1.5149e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.976 sec. to 67.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.950673 ( -0.228849 0.170112 )
Epeak [keV] : 494.562 ( -494.562 -494.562 )
Norm@50keV : 6.49626E-03 ( -0.000840435 0.00153482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.19 using 59 PHA bins.
# Reduced chi-squared = 1.021 for 56 degrees of freedom
# Null hypothesis probability = 4.308336e-01
Photon flux (15-150 keV) in 80 sec: 0.659415 ( -0.023376 0.023327 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81037e-06 ( -1.5956e-07 1.58952e-07 ) ergs/cm2
Band function
Time interval is from -12.976 sec. to 67.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.869940 ( 0.86994 0.86994 )
beta : -1.07939 ( -0.0567041 0.0571971 )
Epeak [keV] : 53.2772 ( )
Norm@50keV : 9.94672E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.19 using 59 PHA bins.
# Reduced chi-squared = 1.058 for 55 degrees of freedom
# Null hypothesis probability = 3.588379e-01
Photon flux (15-150 keV) in 80 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] : 22.9464 ( )
R^2/D10^2 : 1.99540E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 229.74 using 59 PHA bins.
# Reduced chi-squared = 4.0306 for 57 degrees of freedom
# Null hypothesis probability = 1.337208e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.525e-07 1.024e-08
25- 50 8.262e-07 4.044e-08
50-150 3.250e-06 1.524e-07
15-150 4.229e-06 1.640e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 2.85927 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 270.41 using 59 PHA bins.
# Reduced chi-squared = 4.7440 for 57 degrees of freedom
# Null hypothesis probability = 1.672537e-29
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.696e-07 2.000e-08
25- 50 1.096e-06 3.640e-08
50-150 2.403e-06 8.320e-08
15-150 4.068e-06 1.336e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.50819 (-0.996999 1.12867)
R1^2/D10^2 : 0.386738 (-0.143881 0.253718)
kT2 [keV] : 32.6403 (-2.83528 3.77887)
R2^2/D10^2 : 5.85519E-03 (-0.00173119 0.00202654)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.64 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 55 degrees of freedom
# Null hypothesis probability = 4.505157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.736e-07 5.224e-08
25- 50 9.402e-07 7.840e-08
50-150 3.519e-06 2.524e-07
15-150 4.833e-06 3.224e-07
Peak spectrum fit
Power-law model
Time interval is from 10.524 sec. to 11.524 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.972215 ( -0.133531 0.130715 )
Norm@50keV : 2.17153E-02 ( -0.00171739 0.00171279 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.38 using 59 PHA bins.
# Reduced chi-squared = 0.8664 for 57 degrees of freedom
# Null hypothesis probability = 7.532140e-01
Photon flux (15-150 keV) in 1 sec: 2.49679 ( -0.199883 0.200303 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37171e-07 ( -1.99404e-08 2.00209e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.524 sec. to 11.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.296301 ( -0.641017 0.551349 )
Epeak [keV] : 146.601 ( -44.6563 337.348 )
Norm@50keV : 4.30554E-02 ( -0.0180811 0.0366737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.88 using 59 PHA bins.
# Reduced chi-squared = 0.8015 for 56 degrees of freedom
# Null hypothesis probability = 8.566246e-01
Photon flux (15-150 keV) in 1 sec: 2.43693 ( -0.20678 0.20634 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.30892e-07 ( -2.1295e-08 2.1113e-08 ) ergs/cm2
Band function
Time interval is from 10.524 sec. to 11.524 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -1.02925 ( -0.146995 0.146016 )
Epeak [keV] : 27.8115 ( -27.8115 9.12909 )
Norm@50keV : 780.486 ( -60.385 3.23464e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.43 using 59 PHA bins.
# Reduced chi-squared = 0.8623 for 55 degrees of freedom
# Null hypothesis probability = 7.561471e-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] : 22.2734 (-2.15163 2.48742)
R^2/D10^2 : 8.82501E-02 (-0.0249347 0.033442)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.17 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.961299e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.056e-09 1.244e-09
25- 50 4.291e-08 5.425e-09
50-150 1.591e-07 2.225e-08
15-150 2.101e-07 2.105e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-12.0956 -200)
Norm : 10.0754 (-0.827837 0.827837)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.42 using 59 PHA bins.
# Reduced chi-squared = 1.727 for 57 degrees of freedom
# Null hypothesis probability = 5.434122e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.508e-08 2.450e-09
25- 50 4.825e-08 2.010e-08
50-150 1.058e-07 4.470e-08
15-150 1.791e-07 6.132e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.77385 (-3.23069 7.10157)
R1^2/D10^2 : 0.921322 (-0.717806 4.91176)
kT2 [keV] : 28.8992 (-5.19195 31.5645)
R2^2/D10^2 : 3.45581E-02 (-0.0315052 0.0338094)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.26 using 59 PHA bins.
# Reduced chi-squared = 0.8228 for 55 degrees of freedom
# Null hypothesis probability = 8.227394e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.447e-08 6.912e-09
25- 50 4.444e-08 1.803e-08
50-150 1.717e-07 5.622e-08
15-150 2.306e-07 7.422e-08
Plot creation:
Sun Jan 14 04:48:54 EST 2018