batgrbproduct analysis for trigger=745090
batgrbproduct Analysis for Trigger=745090
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 Apr 3 13:26:39 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger745090/GCN5_download_cron
======================================================================
Trigger: 00745090 Segment: 000
BAT Trigger Time: 512822040 [s; MET]
Trigger Stop: 512822104 [s; MET]
UTC: 2017-04-02T10:33:41.152780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 202.405543818573 Dec: 47.3575226263738 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.24
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.24
Flight Position: [ source = BAT ]
RA: 202.405543818573 Dec: 47.3575226263738 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 202.426513670558 Dec: 47.3135799142057 [deg; J2000]
{ 13h 29m 42.4s , +47d 18' 48.9" }
+/- 4.0783512050482 [arcmin] (estimated 90% radius based on SNR)
+/- 2.2676389028221 [arcmin] (formal 1-sigma fit error)
SNR: 4.0831702767038
Angular difference between Flight and Ground position is 2.771016 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.183088 0.131949 0.003724 0.068215
0.057859 0.057222 0.049489 0.044233 [error]
Peak 0.183088 0.131949 0.003724 0.068215
0.057859 0.057222 0.049489 0.044233 [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 4.99e-08 5.54e-08 4.40e-08 5.77e-08 1.71e-07 2.08e-07 erg/cm2
Error 2.54e-08 2.69e-08 4.33e-08 1.08e-07 9.30e-08 1.58e-07 erg/cm2
Peak flux Power-law 2.56e-02 1.58e-02 6.27e-03 3.35e-03 4.94e-02 5.10e-02 ph/cm2/s
Error 1.32e-02 7.47e-03 5.10e-03 5.72e-03 2.17e-02 2.28e-02 ph/cm2/s
Fluence Cutoff-PL 6.69e-08 4.85e-08 1.69e-10 4.68e-18 1.16e-07 1.16e-07 erg/cm2
Error 2.94e-08 3.04e-08 1.28e-08 0.00e+00 4.48e-08 4.48e-08 erg/cm2
Peak flux Cutoff-PL 3.27e-02 1.58e-02 3.13e-05 4.60e-13 4.85e-02 4.85e-02 ph/cm2/s
Error 1.49e-02 9.39e-03 2.01e-03 0.00e+00 1.83e-02 1.84e-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 2.330 0.860 - - 2.78e-04 1.77e-04 60.660 57
CPL -10.000 -0.159 23.5 3.7 9.37e+05 2.72e+06 55.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.330 0.860 - - 2.78e-04 1.77e-04 60.660 57
CPL -10.000 -0.171 23.5 3.7 9.37e+05 2.72e+06 55.670 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
202.4265 +47.3136 0.0472 29.9 -159.2 0.4930 4.1 TRIG_00745090
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.32994 ( -0.765511 0.954985 )
Norm@50keV : 2.77960E-04 ( -0.00017131 0.000182711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.66 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.454730e-01
Photon flux (15-150 keV) in 64 sec: 4.93901E-02 ( -0.0216159 0.0217375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7065e-07 ( -8.58573e-08 1.00195e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99969 ( 9.99994 9.68112 )
Epeak [keV] : 23.5261 ( -3.24971 4.11054 )
Norm@50keV : 9.36548E+05 ( -933751 4.50633e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.67 using 59 PHA bins.
# Reduced chi-squared = 0.9941 for 56 degrees of freedom
# Null hypothesis probability = 4.872304e-01
Photon flux (15-150 keV) in 64 sec: 4.85239E-02 4.84584E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25497e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.80618 -5 )
beta : -3.78388 ( 3.78253 1.58727 )
Epeak [keV] : 24.0532 ( -5.21554 6.36544 )
Norm@50keV : 104.742 ( -39.7222 428.031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.254365e-01
Photon flux (15-150 keV) in 64 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] : 6.67879 (-2.13185 3.48783)
R^2/D10^2 : 0.125898 (-0.125898 0.518056)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.344669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.485e-08 3.440e-08
25- 50 6.845e-08 4.586e-08
50-150 9.542e-09 8.269e-09
15-150 1.328e-07 9.056e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.1525 (-16.8566 75.1868)
Norm : 0.409161 (-0.237272 0.584836)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.343e-08 3.350e-08
25- 50 6.123e-08 4.038e-08
50-150 3.375e-08 3.322e-08
15-150 1.484e-07 1.025e-07
Double BB
R1^2/D10^2 : 3.33572E-06 (-3.33601e-06 -3.33601e-06)
kT2 [keV] : 6.38625 (-2.0078 3.33554)
R2^2/D10^2 : 0.147381 (-0.120733 0.593774)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.04 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.640645e-01
# Null hypothesis probability = 3.814411e-01
# Null hypothesis probability = 3.822239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.553e-08 4.074e-07
25- 50 6.764e-08 9.210e-07
50-150 1.601e-08 1.213e-06
15-150 1.392e-07 3.494e-06
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.32994 ( -0.765511 0.954985 )
Norm@50keV : 2.77960E-04 ( -0.00017131 0.000182711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.66 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 57 degrees of freedom
# Null hypothesis probability = 3.454730e-01
Photon flux (15-150 keV) in 64 sec: 4.93901E-02 ( -0.0216159 0.0217375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7065e-07 ( -8.58573e-08 1.00195e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.99969 ( 9.99994 9.65832 )
Epeak [keV] : 23.5261 ( -3.24971 4.11054 )
Norm@50keV : 9.36548E+05 ( -933751 4.50633e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.67 using 59 PHA bins.
# Reduced chi-squared = 0.9941 for 56 degrees of freedom
# Null hypothesis probability = 4.872304e-01
Photon flux (15-150 keV) in 64 sec: 4.85239E-02 4.84584E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.25497e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.80618 -5 )
beta : -3.78388 ( 3.78253 1.58727 )
Epeak [keV] : 24.0532 ( -5.21554 6.36544 )
Norm@50keV : 104.742 ( -39.7222 428.031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.32 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 55 degrees of freedom
# Null hypothesis probability = 4.254365e-01
Photon flux (15-150 keV) in 64 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] : 6.67879 (-2.13185 3.48783)
R^2/D10^2 : 0.125898 (-0.125898 0.518056)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.10 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.344669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.485e-08 3.440e-08
25- 50 6.845e-08 4.397e-08
50-150 9.542e-09 9.722e-09
15-150 1.328e-07 8.483e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 30.1525 (-16.8566 75.1868)
Norm : 0.409161 (-0.237272 0.584836)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.46 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 57 degrees of freedom
# Null hypothesis probability = 3.861909e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.343e-08 3.456e-08
25- 50 6.123e-08 4.010e-08
50-150 3.375e-08 3.219e-08
15-150 1.484e-07 1.025e-07
Double BB
R1^2/D10^2 : 3.33572E-06 (-3.33601e-06 -3.33601e-06)
kT2 [keV] : 6.38625 (-2.0078 3.33554)
R2^2/D10^2 : 0.147381 (-0.120733 0.593774)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.04 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.52 using 59 PHA bins.
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.640645e-01
# Null hypothesis probability = 3.814411e-01
# Null hypothesis probability = 3.822239e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.553e-08 3.376e-07
25- 50 6.764e-08 1.323e-06
50-150 1.601e-08 1.216e-06
15-150 1.392e-07 3.360e-06
Plot creation:
Mon Apr 3 13:45:25 EDT 2017