batgrbproduct analysis for trigger=804692
batgrbproduct Analysis for Trigger=804692
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 Jan 12 19:21:37 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger804692/GCN5_download_cron
======================================================================
Trigger: 00804692 Segment: 000
BAT Trigger Time: 537381746.688 [s; MET]
Trigger Stop: 537381746.944 [s; MET]
UTC: 2018-01-11T16:42:06.387380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 149.84082869691 Dec: 48.2647072728262 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.93
Image Trigger?: NO
Rate S/N Ratio: 76.3020314277412 [ if not an image trigger ]
Image S/N Ratio: 10.93
Flight Position: [ source = BAT ]
RA: 149.84082869691 Dec: 48.2647072728262 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 149.781728230432 Dec: 48.2540677028056 [deg; J2000]
{ 09h 59m 07.6s , +48d 15' 14.6" }
+/- 0.667890789010868 [arcmin] (estimated 90% radius based on SNR)
+/- 0.221153450857429 [arcmin] (formal 1-sigma fit error)
SNR: 54.1426065493329
Angular difference between Flight and Ground position is 2.445589 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 50.7599999904633 +/- 1.86752460523582
Measured from: 1.78800010681152
to: 52.5480000972748 [s; relative to TRIGTIME]
T50: 22.2359999418259 +/- 0.372945075319846
Measured from: 10.4080001115799
to: 32.6440000534058 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 13.8880000114441
to: 14.8880000114441 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.296000003814697
to: 68.5920000076294 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.452526 5.311096 4.640653 1.517804
0.057160 0.063059 0.059003 0.048824 [error]
Peak 0.117337 0.200977 0.222012 0.089669
0.008909 0.010708 0.010785 0.008654 [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 2.26e-06 3.67e-06 1.35e-05 1.02e-05 2.05e-05 erg/cm2
Error 4.28e-08 5.11e-08 6.88e-08 6.18e-07 1.76e-07 6.34e-07 erg/cm2
Peak flux Power-law 1.06e+00 1.46e+00 1.49e+00 2.77e+00 4.89e+00 6.78e+00 ph/cm2/s
Error 1.19e-01 9.82e-02 8.61e-02 3.56e-01 2.65e-01 4.05e-01 ph/cm2/s
Fluence Cutoff-PL 1.08e-06 2.26e-06 3.67e-06 1.34e-05 1.02e-05 2.02e-05 erg/cm2
Error 4.50e-08 5.10e-08 6.91e-08 4.98e-07 1.75e-07 7.54e-07 erg/cm2
Peak flux Cutoff-PL 1.04e+00 1.45e+00 1.50e+00 2.81e+00 4.88e+00 6.80e+00 ph/cm2/s
Error 1.40e-01 1.02e-01 9.89e-02 6.70e-01 2.68e-01 6.79e-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 1.297 0.033 - - 1.49e-02 2.60e-04 36.910 57
CPL 1.294 0.034 9999.3 0.0 1.49e-02 6.80e-04 37.030 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.970 0.095 - - 4.26e-02 2.27e-03 52.880 57
CPL 0.964 0.234 10000.0 0.0 4.28e-02 2.25e-03 52.870 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: 43.456000 sec.
T50 in the 50-300 keV band: 19.776000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 68.888 -0.296 68.592
T90 50.760 1.788 52.548
T50 22.236 10.408 32.644
Peak 1.000 13.888 14.888
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
149.7817 +48.2541 0.0035 28.1 28.4 3.5856 54.1 TRIG_00804692
------------------------------------------
Foreground time interval of the image:
-0.296 9.413 (delta_t = 9.709 [sec])
Background time interval of the image:
-239.688 -0.296 (delta_t = 239.392 [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 -0.296 sec. to 68.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29675 ( -0.0335141 0.0334133 )
Norm@50keV : 1.48989E-02 ( -0.000260678 0.000260192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.91 using 59 PHA bins.
# Reduced chi-squared = 0.6475 for 57 degrees of freedom
# Null hypothesis probability = 9.821046e-01
Photon flux (15-150 keV) in 68.89 sec: 1.77642 ( -0.0353493 0.0355233 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01507e-05 ( -1.75621e-07 1.75718e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.296 sec. to 68.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29382 ( -0.035016 0.032684 )
Epeak [keV] : 9999.28 ( -9999.36 -9999.36 )
Norm@50keV : 1.49420E-02 ( -0.000259222 0.0010998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.03 using 59 PHA bins.
# Reduced chi-squared = 0.6613 for 56 degrees of freedom
# Null hypothesis probability = 9.762753e-01
Photon flux (15-150 keV) in 68.89 sec: 1.77535 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01513e-05 ( -1.75463e-07 1.74361e-07 ) ergs/cm2
Band function
Time interval is from -0.296 sec. to 68.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.571461 ( 0.805657 5.49215 )
beta : -1.30729 ( -0.0444954 0.0377875 )
Epeak [keV] : 57.0346 ( -56.9193 163.123 )
Norm@50keV : 4.61791E-02 ( -0.0466521 1.01021e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.84 using 59 PHA bins.
# Reduced chi-squared = 0.6517 for 55 degrees of freedom
# Null hypothesis probability = 9.788286e-01
Photon flux (15-150 keV) in 68.89 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] : 20.5976 ( )
R^2/D10^2 : 6.91384E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 765.76 using 59 PHA bins.
# Reduced chi-squared = 13.434 for 57 degrees of freedom
# Null hypothesis probability = 1.058495e-124
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.849e-07 1.454e-08
25- 50 1.954e-06 5.580e-08
50-150 6.169e-06 1.605e-07
15-150 8.509e-06 1.688e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 7.67226 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 283.92 using 59 PHA bins.
# Reduced chi-squared = 4.9810 for 57 degrees of freedom
# Null hypothesis probability = 7.347701e-32
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.316e-06 2.583e-08
25- 50 2.532e-06 5.167e-08
50-150 5.553e-06 1.092e-07
15-150 9.401e-06 1.688e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.75554 (-0.567208 0.595632)
R1^2/D10^2 : 0.789239 (-0.151775 0.197978)
kT2 [keV] : 37.1397 (-2.76663 3.45979)
R2^2/D10^2 : 8.44253E-03 (-0.0020424 0.00238928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.42 using 59 PHA bins.
# Reduced chi-squared = 0.7532 for 55 degrees of freedom
# Null hypothesis probability = 9.122128e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.086e-07 5.752e-08
25- 50 2.354e-06 7.922e-08
50-150 6.893e-06 2.917e-07
15-150 1.016e-05 3.100e-07
Peak spectrum fit
Power-law model
Time interval is from 13.888 sec. to 14.888 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.970117 ( -0.0959154 0.0947778 )
Norm@50keV : 4.25647E-02 ( -0.00227486 0.00226801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.88 using 59 PHA bins.
# Reduced chi-squared = 0.9276 for 57 degrees of freedom
# Null hypothesis probability = 6.304734e-01
Photon flux (15-150 keV) in 1 sec: 4.89370 ( -0.264607 0.264962 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.65264e-07 ( -2.71563e-08 2.72454e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 13.888 sec. to 14.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.964069 ( -0.353462 0.113785 )
Epeak [keV] : 9999.99 ( -9999.99 -9999.99 )
Norm@50keV : 4.28287E-02 ( -0.00225512 0.00224993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.87 using 59 PHA bins.
# Reduced chi-squared = 0.9441 for 56 degrees of freedom
# Null hypothesis probability = 5.940643e-01
Photon flux (15-150 keV) in 1 sec: 4.88140 ( -0.25642 0.279 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6439e-07 ( -2.7702e-08 2.8325e-08 ) ergs/cm2
Band function
Time interval is from 13.888 sec. to 14.888 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.832978 ( 0.832978 0.832978 )
beta : -0.970118 ( -0.0947428 0.096025 )
Epeak [keV] : 43.3753 ( -43.3753 -43.3753 )
Norm@50keV : 6.67731E-02 ( -0.0264524 7450.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.88 using 59 PHA bins.
# Reduced chi-squared = 0.9614 for 55 degrees of freedom
# Null hypothesis probability = 5.562082e-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] : 22.6074 ( )
R^2/D10^2 : 0.161006 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 117.78 using 59 PHA bins.
# Reduced chi-squared = 2.0663 for 57 degrees of freedom
# Null hypothesis probability = 4.019847e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.504e-08 1.630e-09
25- 50 8.079e-08 6.235e-09
50-150 3.085e-07 2.805e-08
15-150 4.044e-07 2.595e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 19.6673 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 153.62 using 59 PHA bins.
# Reduced chi-squared = 2.6951 for 57 degrees of freedom
# Null hypothesis probability = 8.315655e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.897e-08 2.825e-09
25- 50 9.421e-08 6.635e-09
50-150 2.066e-07 4.965e-08
15-150 3.498e-07 4.435e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.2651 (-2.56498 2.80825)
R1^2/D10^2 : 1.11334 (-0.506029 1.37146)
kT2 [keV] : 45.7460 (-12.3099 45.7186)
R2^2/D10^2 : 1.62905E-02 (-0.0131029 0.0256991)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.67 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.125278e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.808e-08 5.970e-09
25- 50 9.032e-08 1.816e-08
50-150 3.494e-07 1.436e-07
15-150 4.678e-07 1.694e-07
Plot creation:
Fri Jan 12 19:27:31 EST 2018