batgrbproduct Analysis for Trigger=607506
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): Tue Jul 29 18:47:34 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger607506/GCN5_download_cron
======================================================================
Trigger: 00607506 Segment: 000
BAT Trigger Time: 428356480 [s; MET]
Trigger Stop: 428356544 [s; MET]
UTC: 2014-07-29T19:54:27.671780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 150.766349571682 Dec: -26.0278547178017 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.92
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.92
Flight Position: [ source = BAT ]
RA: 150.766349571682 Dec: -26.0278547178017 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 150.759073868325 Dec: -25.9902775843418 [deg; J2000]
{ 10h 03m 02.2s , -25d 59' 25.0" }
+/- 4.96347485124418 [arcmin] (estimated 90% radius based on SNR)
+/- 3.55172050020153 [arcmin] (formal 1-sigma fit error)
SNR: 3.08417227592691
Angular difference between Flight and Ground position is 2.288509 arcmin
Partial Coding Fraction: 0.359375 [ 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 0.183805 0.329091 0.021456 -0.012631
0.070705 0.073401 0.065112 0.060347 [error]
Peak 0.183805 0.329091 0.021456 -0.012631
0.070705 0.073401 0.065112 0.060347 [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 1.03e-07 1.00e-07 6.85e-08 7.34e-08 3.01e-07 3.46e-07 erg/cm2
Error 3.97e-08 3.95e-08 5.03e-08 1.14e-07 1.26e-07 1.89e-07 erg/cm2
Peak flux Power-law 5.42e-02 2.96e-02 1.01e-02 4.47e-03 9.63e-02 9.84e-02 ph/cm2/s
Error 2.14e-02 1.12e-02 7.16e-03 6.47e-03 3.21e-02 3.31e-02 ph/cm2/s
Fluence Cutoff-PL 9.17e-08 1.38e-07 1.85e-08 4.30e-11 2.48e-07 2.49e-07 erg/cm2
Error 6.91e-08 4.43e-08 4.48e-08 2.88e-08 9.61e-08 9.67e-08 erg/cm2
Peak flux Cutoff-PL 4.62e-02 4.15e-02 3.18e-03 3.96e-06 9.09e-02 9.09e-02 ph/cm2/s
Error 3.57e-02 1.71e-02 6.76e-03 1.90e-03 3.87e-02 3.87e-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 2.552 0.729 - - 4.75e-04 2.62e-04 61.860 57
CPL -2.947 1.004 28.4 18.5 2.29e+00 0.00e+00 58.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.552 0.729 - - 4.75e-04 2.62e-04 61.860 57
CPL -2.947 1.004 28.4 18.5 2.29e+00 0.00e+00 58.930 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
150.7591 -25.9903 0.0623 46.7 -165.1 0.4654 3.1 TRIG_00607506
------------------------------------------
Foreground time interval of the image:
0.000 36.580 (delta_t = 36.580 [sec])
38.000 64.000 (delta_t = 26.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.580000
38.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55159 ( -0.625472 0.831551 )
Norm@50keV : 4.74837E-04 ( -0.000257741 0.000267132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.069557e-01
Photon flux (15-150 keV) in 62.58 sec: 9.63071E-02 ( -0.0320872 0.0321383 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01364e-07 ( -1.19209e-07 1.33098e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.580000
38.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.94734 ( 1.58667 3.59525 )
Epeak [keV] : 28.3795 ( -27.8037 9.21148 )
Norm@50keV : 2.28831 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 56 degrees of freedom
# Null hypothesis probability = 3.687460e-01
Photon flux (15-150 keV) in 62.58 sec: 9.09027E-02 ( -0.0459859 0.0314043 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48434e-07 ( -8.66314e-08 1.05499e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.580000
38.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.04492 ( -4.65721 -3.30465 )
beta : -9.37167 ( 9.37162 19.3382 )
Epeak [keV] : 28.5590 ( -6.60564 7.40037 )
Norm@50keV : 2.60483 ( -2.60492 25.6951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.94 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Null hypothesis probability = 3.335788e-01
Photon flux (15-150 keV) in 62.58 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] : 7.12485 (-1.83414 2.37179)
R^2/D10^2 : 0.183251 (-0.183251 0.45442)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.98 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.029780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.522e-08 5.751e-08
25- 50 1.349e-07 8.473e-08
50-150 2.382e-08 1.928e-08
15-150 2.540e-07 1.511e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5732 (-13.2354 34.3807)
Norm : 0.856405 (-0.424327 0.947184)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.540520e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.042e-07 5.862e-08
25- 50 1.135e-07 7.100e-08
50-150 5.546e-08 4.922e-08
15-150 2.731e-07 1.804e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 ( )
R1^2/D10^2 : 1.96962E-06 (-1.96966e-06 -1.96966e-06)
kT2 [keV] : 7.02149 (-1.83555 2.39642)
R2^2/D10^2 : 0.192586 (-0.13661 0.491232)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.98 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.85 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.321402e-01
# Null hypothesis probability = 3.364873e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.529e-08 8.614e-02
25- 50 1.357e-07 8.304e-01
50-150 2.421e-08 2.125e+01
15-150 2.552e-07 2.032e+01
Peak spectrum fit
Power-law model
Time interval is from 38.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55159 ( -0.625472 0.831551 )
Norm@50keV : 4.74837E-04 ( -0.000257741 0.000267132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.069557e-01
Photon flux (15-150 keV) in 62.58 sec: 9.63071E-02 ( -0.0320872 0.0321383 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01364e-07 ( -1.19209e-07 1.33098e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 38.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.94734 ( 1.58667 3.59525 )
Epeak [keV] : 28.3795 ( -27.8037 9.21148 )
Norm@50keV : 2.28831 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 56 degrees of freedom
# Null hypothesis probability = 3.687460e-01
Photon flux (15-150 keV) in 62.58 sec: 9.09027E-02 ( -0.0459859 0.0314043 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48434e-07 ( -8.66314e-08 1.05499e-07 ) ergs/cm2
Band function
Time interval is from 38.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.04492 ( -4.65721 -3.30465 )
beta : -9.37167 ( 9.37162 19.3382 )
Epeak [keV] : 28.5590 ( -6.60564 7.40037 )
Norm@50keV : 2.60483 ( -2.60492 25.6951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.94 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Null hypothesis probability = 3.335788e-01
Photon flux (15-150 keV) in 62.58 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] : 7.12485 (-1.83414 2.37179)
R^2/D10^2 : 0.183251 (-0.183251 0.45442)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.98 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.029780e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.522e-08 5.864e-08
25- 50 1.349e-07 8.527e-08
50-150 2.382e-08 2.053e-08
15-150 2.540e-07 1.491e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5732 (-13.2354 34.3807)
Norm : 0.856405 (-0.424327 0.947184)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 57 degrees of freedom
# Null hypothesis probability = 3.540520e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.042e-07 6.110e-08
25- 50 1.135e-07 7.184e-08
50-150 5.546e-08 4.794e-08
15-150 2.731e-07 1.776e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 200.000 ( )
R1^2/D10^2 : 1.96962E-06 (-1.96966e-06 -1.96966e-06)
kT2 [keV] : 7.02149 (-1.83555 2.39642)
R2^2/D10^2 : 0.192586 (-0.13661 0.491232)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.98 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.85 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 55 degrees of freedom
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.321402e-01
# Null hypothesis probability = 3.364873e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.529e-08 1.029e-01
25- 50 1.357e-07 7.682e-01
50-150 2.421e-08 2.064e+01
15-150 2.552e-07 2.301e+01
Plot creation:
Tue Jul 29 18:57:57 EDT 2014