batgrbproduct Analysis for Trigger=604675
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): Wed Jul 16 15:31:33 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger604675/GCN5_download_cron
======================================================================
Trigger: 00604675 Segment: 000
BAT Trigger Time: 427151664 [s; MET]
Trigger Stop: 427151984 [s; MET]
UTC: 2014-07-15T21:14:11.730580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 51.648674983384 Dec: 28.7170193370916 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.75
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.75
Flight Position: [ source = BAT ]
RA: 51.648674983384 Dec: 28.7170193370916 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 51.6878878063432 Dec: 28.702553272909 [deg; J2000]
{ 03h 26m 45.1s , +28d 42' 09.2" }
+/- 2.60405344441145 [arcmin] (estimated 90% radius based on SNR)
+/- 1.91544890523353 [arcmin] (formal 1-sigma fit error)
SNR: 7.75055528052148
Angular difference between Flight and Ground position is 2.238641 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.130245 0.557707 0.090458 0.093224
0.096620 0.098175 0.083796 0.070243 [error]
Peak 1.130245 0.557707 0.090458 0.093224
0.096620 0.098175 0.083796 0.070243 [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 3.08e-07 2.40e-07 1.25e-07 9.44e-08 7.16e-07 7.67e-07 erg/cm2
Error 4.76e-08 4.94e-08 5.40e-08 7.41e-08 1.37e-07 1.76e-07 erg/cm2
Peak flux Power-law 3.22e-02 1.41e-02 3.68e-03 1.18e-03 5.07e-02 5.12e-02 ph/cm2/s
Error 5.09e-03 2.77e-03 1.54e-03 8.72e-04 7.22e-03 7.37e-03 ph/cm2/s
Fluence Cutoff-PL 3.10e-07 2.54e-07 7.68e-08 7.33e-09 6.47e-07 6.48e-07 erg/cm2
Error 4.97e-08 5.86e-08 8.35e-08 7.85e-08 1.48e-07 1.88e-07 erg/cm2
Peak flux Cutoff-PL 3.22e-02 1.50e-02 2.39e-03 1.21e-04 4.97e-02 4.97e-02 ph/cm2/s
Error 5.30e-03 3.31e-03 2.44e-03 9.57e-04 7.14e-03 7.16e-03 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 2.938 0.379 - - 1.93e-04 6.25e-05 47.100 57
CPL 1.688 0.000 7.2 0.0 1.50e-03 0.00e+00 45.830 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.938 0.379 - - 1.93e-04 6.25e-05 47.100 57
CPL 1.688 0.000 7.2 0.0 1.50e-03 0.00e+00 45.830 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
51.6879 +28.7026 0.0247 11.5 -150.4 1.7882 7.8 TRIG_00604675
------------------------------------------
Foreground time interval of the image:
0.000 40.630 (delta_t = 40.630 [sec])
42.000 95.200 (delta_t = 53.200 [sec])
96.000 320.000 (delta_t = 224.000 [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 40.630000
42.000000 95.200000
96.000000 320.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.93781 ( -0.350675 0.406634 )
Norm@50keV : 1.92765E-04 ( -6.03946e-05 6.466e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.10 using 59 PHA bins.
# Reduced chi-squared = 0.8263 for 57 degrees of freedom
# Null hypothesis probability = 8.222565e-01
Photon flux (15-150 keV) in 317.8 sec: 5.06855E-02 ( -0.00721149 0.00722717 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.15778e-07 ( -1.3238e-07 1.42532e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 40.630000
42.000000 95.200000
96.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68824 ( )
Epeak [keV] : 7.15996 ( )
Norm@50keV : 1.49880E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8184 for 56 degrees of freedom
# Null hypothesis probability = 8.319692e-01
Photon flux (15-150 keV) in 317.8 sec: 4.97127E-02 ( -0.007057 0.0072131 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47216e-07 ( -1.23955e-07 1.71421e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 40.630000
42.000000 95.200000
96.000000 320.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.75127 ( 0.822496 2.75127 )
beta : -2.93783 ( -0.406542 0.350495 )
Epeak [keV] : 40.4241 ( -40.4241 -40.4241 )
Norm@50keV : 2.61991E-02 ( -0.00820809 0.00878859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.10 using 59 PHA bins.
# Reduced chi-squared = 0.8563 for 55 degrees of freedom
# Null hypothesis probability = 7.668739e-01
Photon flux (15-150 keV) in 317.8 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] : 5.17813 (-0.79881 0.96146)
R^2/D10^2 : 0.357358 (-0.191416 0.426928)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.14 using 59 PHA bins.
# Reduced chi-squared = 0.8797 for 57 degrees of freedom
# Null hypothesis probability = 7.280706e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.171e-07 8.310e-08
25- 50 2.255e-07 7.297e-08
50-150 1.083e-08 7.164e-09
15-150 5.534e-07 1.503e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.5628 (-5.20842 7.56082)
Norm : 0.672132 (-0.219067 0.376528)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.93 using 59 PHA bins.
# Reduced chi-squared = 0.8058 for 57 degrees of freedom
# Null hypothesis probability = 8.529100e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.101e-07 6.694e-08
25- 50 2.559e-07 7.055e-08
50-150 6.743e-08 4.345e-08
15-150 6.335e-07 1.382e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84331 (-1.27143 1.22799)
R1^2/D10^2 : 1.10089 (-0.757453 5.75064)
kT2 [keV] : 10.6202 (-7.43572 12.2112)
R2^2/D10^2 : 7.85220E-03 (-0.00778878 0.093537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.8095 for 55 degrees of freedom
# Null hypothesis probability = 8.428182e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.197e-07 1.661e-07
25- 50 2.416e-07 1.278e-07
50-150 9.844e-08 6.779e-08
15-150 6.597e-07 3.261e-07
Peak spectrum fit
Power-law model
Time interval is from 96.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.93781 ( -0.350675 0.406634 )
Norm@50keV : 1.92765E-04 ( -6.03946e-05 6.466e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.10 using 59 PHA bins.
# Reduced chi-squared = 0.8263 for 57 degrees of freedom
# Null hypothesis probability = 8.222565e-01
Photon flux (15-150 keV) in 317.8 sec: 5.06855E-02 ( -0.00721149 0.00722717 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.15778e-07 ( -1.3238e-07 1.42532e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 96.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68824 ( )
Epeak [keV] : 7.15996 ( )
Norm@50keV : 1.49880E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8184 for 56 degrees of freedom
# Null hypothesis probability = 8.319692e-01
Photon flux (15-150 keV) in 317.8 sec: 4.97127E-02 ( -0.0070571 0.0072132 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47216e-07 ( -1.23955e-07 1.71421e-07 ) ergs/cm2
Band function
Time interval is from 96.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.75127 ( 0.822496 2.75127 )
beta : -2.93783 ( -0.406542 0.350495 )
Epeak [keV] : 40.4241 ( -40.4241 -40.4241 )
Norm@50keV : 2.61991E-02 ( -0.00820809 0.00878859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.10 using 59 PHA bins.
# Reduced chi-squared = 0.8563 for 55 degrees of freedom
# Null hypothesis probability = 7.668739e-01
Photon flux (15-150 keV) in 317.8 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] : 5.17813 (-0.79881 0.96146)
R^2/D10^2 : 0.357358 (-0.191416 0.426928)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.14 using 59 PHA bins.
# Reduced chi-squared = 0.8797 for 57 degrees of freedom
# Null hypothesis probability = 7.280706e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.171e-07 7.961e-08
25- 50 2.255e-07 6.768e-08
50-150 1.083e-08 7.148e-09
15-150 5.534e-07 1.408e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.5628 (-5.20842 7.56082)
Norm : 0.672132 (-0.219067 0.376528)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.93 using 59 PHA bins.
# Reduced chi-squared = 0.8058 for 57 degrees of freedom
# Null hypothesis probability = 8.529100e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.101e-07 6.234e-08
25- 50 2.559e-07 6.748e-08
50-150 6.743e-08 3.992e-08
15-150 6.335e-07 1.494e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.84331 (-1.27143 1.22799)
R1^2/D10^2 : 1.10089 (-0.757453 5.75064)
kT2 [keV] : 10.6202 (-5.34461 12.2232)
R2^2/D10^2 : 7.85220E-03 (-0.00778878 0.093537)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.52 using 59 PHA bins.
# Reduced chi-squared = 0.8095 for 55 degrees of freedom
# Null hypothesis probability = 8.428182e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.197e-07 1.745e-07
25- 50 2.416e-07 1.327e-07
50-150 9.844e-08 6.780e-08
15-150 6.597e-07 3.300e-07
Plot creation:
Wed Jul 16 15:35:51 EDT 2014