batgrbproduct Analysis for Trigger=680457
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Mar 26 09:57:27 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger680457/GCN5_download_cron
======================================================================
Trigger: 00680457 Segment: 000
BAT Trigger Time: 480604611.136 [s; MET]
Trigger Stop: 480604612.16 [s; MET]
UTC: 2016-03-25T13:16:35.106120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 292.701782051049 Dec: -0.667679244979147 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.55
Image Trigger?: NO
Rate S/N Ratio: 19.0787840283389 [ if not an image trigger ]
Image S/N Ratio: 6.55
Flight Position: [ source = BAT ]
RA: 292.701782051049 Dec: -0.667679244979147 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 292.647751981695 Dec: -0.566076138036116 [deg; J2000]
{ 19h 30m 35.5s , -00d 33' 57.9" }
+/- 4.10333084368562 [arcmin] (estimated 90% radius based on SNR)
+/- 2.70720229257086 [arcmin] (formal 1-sigma fit error)
SNR: 4.04770678421052
Angular difference between Flight and Ground position is 6.904460 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02400004863739 +/- 0.004
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
T50: 1.02400004863739 +/- 0.004
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400004863739 second)
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.009519 0.006914 0.017309 0.029081
0.006390 0.007013 0.006378 0.006929 [error]
Peak 0.009519 0.006914 0.017309 0.029081
0.006390 0.007013 0.006378 0.006929 [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 3.83e-10 2.36e-09 1.26e-083.66e-09 3.09e-076.19e-07 4.14e-08 3.24e-076.23e-07 erg/cm2
Error 1.13e-09 3.24e-09 9.16e-09 4.18e-07 1.69e-08 4.22e-07 erg/cm2
Peak flux Power-law 1.16e-02 3.77e-02 1.01e-012.77e-02 7.99e-011.41e+00 2.76e-011.09e-01 9.48e-011.44e+00 ph/cm2/s
Error 3.51e-02 5.41e-02 7.46e-02 9.79e-01 2.03e-01 1.01e+00 ph/cm2/s
Fluence Cutoff-PL 5.82e-10 3.01e-09 1.31e-08 2.42e-07 4.11e-08 2.54e-07 erg/cm2
Error 1.13e-09 3.24e-09 -------- -------- 1.71e-08 6.44e-07 erg/cm2
Peak flux Cutoff-PL 1.57e-02 4.53e-02 1.06e-01 6.96e-01 2.86e-01 8.45e-01 ph/cm2/s
Error 3.51e-02 5.41e-02 -------- -------- -------- -------- 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 -2.090 0.450 - - 2.09e-04 1.68e-03 55.150 57
CPL 2.497 0.000 140.2 0.0 3.77e-05 0.00e+00 57.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -2.090 0.450 - - 2.09e-04 1.68e-03 55.150 57
CPL 2.497 0.000 140.2 0.0 3.77e-05 0.00e+00 57.730 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
292.6478 -0.5661 0.0475 5.6 146.1 0.0553 4.0 TRIG_00680457
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.136 -11.136 (delta_t = 49.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.08963 ( 0.424044 1.32439 )
Norm@50keV : 2.08634E-04 ( -0.000211509 0.00314621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 57 degrees of freedom
# Null hypothesis probability = 5.449057e-01
Photon flux (15-150 keV) in 1.024 sec: 0.276400 0.108560 ( -0.108613 0.29801 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13723e-08 ( -1.68663e-08 1.68637e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49683 ( )
Epeak [keV] : 140.151 ( )
Norm@50keV : 3.77008E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.110702e-01
Photon flux (15-150 keV) in 1.024 sec: 0.286132 0.101473 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11247e-08 ( -1.68515e-08 1.74025e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.111986 ( 0.421146 0.421146 )
beta : 2.02280 ( -2.76665 -1.99978 )
Epeak [keV] : 9.97815 ( -9.87488 -9.87488 )
Norm@50keV : 6.39357E-04 ( -0.000637737 58167.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.694560e-01
Photon flux (15-150 keV) in 1.024 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] : 197.431 (-197.413 -197.413)
R^2/D10^2 : 1.47899E-04 (-6.17482e-05 0.00320583)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.89 using 59 PHA bins.
# Reduced chi-squared = 0.9805 for 57 degrees of freedom
# Null hypothesis probability = 5.167386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.919e-10 7.270e-11
25- 50 1.629e-09 6.554e-10
50-150 3.959e-08 1.325e-08
15-150 4.141e-08 1.348e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 1.14028 (-0.607505 0.607515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.47 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.881891e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.908e-09 2.096e-09
25- 50 5.593e-09 3.954e-09
50-150 1.227e-08 8.724e-09
15-150 2.077e-08 1.470e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.28162 (-5.28035 1.98041)
R1^2/D10^2 : 0.759477 (-0.759835 779.477)
kT2 [keV] : 197.121 (-197.274 -197.274)
R2^2/D10^2 : 1.42455E-04 (-6.1716e-05 0.00202904)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.72 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 55 degrees of freedom
# Null hypothesis probability = 5.236164e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.528e-09 1.745e-09
25- 50 3.314e-09 1.661e-09
50-150 3.815e-08 1.474e-08
15-150 4.399e-08 1.432e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.08963 ( 0.424044 1.32439 )
Norm@50keV : 2.08634E-04 ( -0.000211509 0.00314621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9675 for 57 degrees of freedom
# Null hypothesis probability = 5.449057e-01
Photon flux (15-150 keV) in 1.024 sec: 0.276400 0.108560 ( -0.108613 0.29801 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.13723e-08 ( -1.68663e-08 1.68637e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.49683 ( )
Epeak [keV] : 140.151 ( )
Norm@50keV : 3.77008E-05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.110702e-01
Photon flux (15-150 keV) in 1.024 sec: 0.286132 0.101473 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11247e-08 ( -1.68515e-08 1.74025e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.111986 ( 0.421146 0.421146 )
beta : 2.02280 ( -2.76665 -1.99978 )
Epeak [keV] : 9.97815 ( -9.87488 -9.87488 )
Norm@50keV : 6.39357E-04 ( -0.000637737 58167.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.694560e-01
Photon flux (15-150 keV) in 1.024 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] : 197.431 (-197.413 -197.413)
R^2/D10^2 : 1.47899E-04 (-6.17482e-05 0.00320583)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.89 using 59 PHA bins.
# Reduced chi-squared = 0.9805 for 57 degrees of freedom
# Null hypothesis probability = 5.167386e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.919e-10 6.712e-11
25- 50 1.629e-09 5.315e-10
50-150 3.959e-08 1.321e-08
15-150 4.141e-08 1.711e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 1.14028 (-0.607505 0.607515)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.47 using 59 PHA bins.
# Reduced chi-squared = 1.096 for 57 degrees of freedom
# Null hypothesis probability = 2.881891e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.908e-09 2.122e-09
25- 50 5.593e-09 3.949e-09
50-150 1.227e-08 8.479e-09
15-150 2.077e-08 1.444e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.28162 (-5.28035 1.97984)
R1^2/D10^2 : 0.759477 (-0.759835 736.598)
kT2 [keV] : 197.121 (-197.274 -197.274)
R2^2/D10^2 : 1.42455E-04 (-6.1716e-05 0.00202904)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.72 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 55 degrees of freedom
# Null hypothesis probability = 5.236164e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.528e-09 1.795e-09
25- 50 3.314e-09 1.652e-09
50-150 3.815e-08 9.103e-09
15-150 4.399e-08 1.294e-08
Plot creation:
Sat Mar 26 10:00:24 EDT 2016