batgrbproduct Analysis for Trigger=456780
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): Fri Jul 8 00:33:44 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger456780/GCN5_download_cron
======================================================================
Trigger: 00456780 Segment: 000
BAT Trigger Time: 331717730.368 [s; MET]
Trigger Stop: 331717731.392 [s; MET]
UTC: 2011-07-07T07:48:43.236440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 22.8609169118743 Dec: 16.7581584992617 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.56
Image Trigger?: NO
Rate S/N Ratio: 25.2784493195291 [ if not an image trigger ]
Image S/N Ratio: 6.56
Flight Position: [ source = BAT ]
RA: 22.8609169118743 Dec: 16.7581584992617 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 22.7362211701514 Dec: 16.9270664411108 [deg; J2000]
{ 01h 30m 56.7s , +16d 55' 37.4" }
+/- 6.2344026088688 [arcmin] (estimated 90% radius based on SNR)
+/- 4.97342165565411 [arcmin] (formal 1-sigma fit error)
SNR: 2.22688183606098
Angular difference between Flight and Ground position is 12.409060 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02400004863739 +/-
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
T50: 1.02400004863739 +/-
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 -0.002674 -0.001586 0.020068 0.036767
0.008338 0.009839 0.008873 0.010979 [error]
Peak -0.002674 -0.001586 0.020068 0.036767
0.008338 0.009839 0.008873 0.010979 [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 7.67e-10 2.93e-09 9.35e-09 9.74e-08 2.63e-08 1.11e-07 erg/cm2
Error 1.45e-09 3.36e-09 8.07e-09 2.63e-07 2.31e-08 2.65e-07 erg/cm2
Peak flux Power-law 2.40e-02 4.82e-02 7.69e-02 2.74e-01 2.13e-01 4.19e-01 ph/cm2/s
Error 4.55e-02 5.66e-02 6.64e-02 6.02e-01 1.91e-01 5.72e-01 ph/cm2/s
Fluence Cutoff-PL 8.55e-12 1.37e-09 1.82e-08 8.26e-09 2.73e-08 2.76e-08 erg/cm2
Error 4.26e-10 2.95e-09 1.13e-08 3.28e-08 2.00e-08 3.99e-08 erg/cm2
Peak flux Cutoff-PL 2.34e-04 1.96e-02 1.49e-01 4.28e-02 2.09e-01 2.09e-01 ph/cm2/s
Error 1.08e-02 2.82e-02 9.26e-02 1.14e-01 1.37e-01 1.59e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.408 0.954 - - 1.79e-03 1.70e-03 57.140 57
CPL -9.587 0.000 89.3 79.8 1.21e+00 1.40e+00 53.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.408 0.954 - - 1.79e-03 1.70e-03 57.140 57
CPL -9.587 0.000 89.3 80.0 1.21e+00 1.40e+00 53.640 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
22.7362 +16.9271 0.0863 7.2 -44.0 0.0446 2.2 TRIG_00456780
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-21.267 -10.368 (delta_t = 10.899 [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: 0.407533 ( -0.252834 1.65484 )
Norm@50keV : 1.78721E-03 ( -0.00177565 0.0016275 )
------------------------------------------------------------
# Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.697073e-01
Photon flux (15-150 keV) in 1.024 sec: 0.213470 ( -0.189773 0.191957 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62775e-08 ( -2.2818e-08 2.34161e-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: -9.58692 ( )
Epeak [keV] : 89.3008 ( -27.5952 132.048 )
Norm@50keV : 1.20586 ( -1.30143 1.49215 )
------------------------------------------------------------
# Chi-Squared = 53.64 using 59 PHA bins.
# Reduced chi-squared = 0.9579 for 56 degrees of freedom
# Null hypothesis probability = 5.647171e-01
Photon flux (15-150 keV) in 1.024 sec: 0.208750 ( -0.128918 0.144947 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72886e-08 ( -1.78711e-08 2.21816e-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 : 4.38550 ( -21.9678 -11.9748 )
beta : -10.00000 ( 1.8396e+06 1.83961e+06 )
Epeak [keV] : 100.329 ( -49.9129 246.194 )
Norm@50keV : 5.61839E-02 ( -0.0564225 0.0533337 )
------------------------------------------------------------
# Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9885 for 55 degrees of freedom
# Null hypothesis probability = 4.986848e-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] : 32.2225 ( )
R^2/D10^2 : 3.35141E-03 (-0.00371177 0.0212162)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9772 for 57 degrees of freedom
# Null hypothesis probability = 5.239556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 0.698321 ( )
Norm : 4.09888E+08 ( )
------------------------------------------------------------
# Chi-Squared = 58.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.206464e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.941e-10 1.351e-12
25- 50 4.297e-15 8.878e-18
50-150 0.000e+00 0.000e+00
15-150 2.941e-10 2.685e-12
Double BB
------------------------------------------------------------
# Chi-Squared = 56.23 using 59 PHA bins.
# Chi-Squared = 55.70 using 59 PHA bins.
# Chi-Squared = 55.72 using 59 PHA bins.
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.286747e-01
# Null hypothesis probability = 4.483372e-01
# Null hypothesis probability = 4.476816e-01
# Null hypothesis probability = 4.482325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.285e-10 6.205e+06
25- 50 2.346e-09 5.514e+07
50-150 2.725e-08 1.163e+09
15-150 2.992e-08 1.107e+09
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: 0.407533 ( -0.252834 1.65484 )
Norm@50keV : 1.78721E-03 ( -0.00177565 0.0016275 )
------------------------------------------------------------
# Chi-Squared = 57.14 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.697073e-01
Photon flux (15-150 keV) in 1.024 sec: 0.213470 ( -0.189773 0.191957 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62775e-08 ( -2.2818e-08 2.34161e-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: -9.58692 ( )
Epeak [keV] : 89.3008 ( -27.5952 132.452 )
Norm@50keV : 1.20586 ( -1.30143 1.49215 )
------------------------------------------------------------
# Chi-Squared = 53.64 using 59 PHA bins.
# Reduced chi-squared = 0.9579 for 56 degrees of freedom
# Null hypothesis probability = 5.647171e-01
Photon flux (15-150 keV) in 1.024 sec: 0.208750 ( -0.128918 0.144947 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.72886e-08 ( -1.78711e-08 2.21816e-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 : 4.38550 ( -21.9709 -11.9748 )
beta : -10.00000 ( 1.8396e+06 1.83961e+06 )
Epeak [keV] : 100.329 ( -49.9129 225.814 )
Norm@50keV : 5.61839E-02 ( -0.0564225 0.0533418 )
------------------------------------------------------------
# Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9885 for 55 degrees of freedom
# Null hypothesis probability = 4.986848e-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] : 32.2225 ( )
R^2/D10^2 : 3.35141E-03 (-0.00371177 0.0212162)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 0.9772 for 57 degrees of freedom
# Null hypothesis probability = 5.239556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 0.698321 ( )
Norm : 4.09888E+08 ( )
------------------------------------------------------------
# Chi-Squared = 58.48 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.206464e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.941e-10 5.253e-12
25- 50 4.297e-15 1.019e-18
50-150 0.000e+00 0.000e+00
15-150 2.941e-10 7.173e-12
Double BB
------------------------------------------------------------
# Chi-Squared = 56.23 using 59 PHA bins.
# Chi-Squared = 55.70 using 59 PHA bins.
# Chi-Squared = 55.72 using 59 PHA bins.
# Chi-Squared = 55.70 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.286747e-01
# Null hypothesis probability = 4.483372e-01
# Null hypothesis probability = 4.476816e-01
# Null hypothesis probability = 4.482325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.285e-10 6.671e+06
25- 50 2.346e-09 5.847e+07
50-150 2.725e-08 1.372e+09
15-150 2.992e-08 1.206e+09
Plot creation:
Fri Jul 8 00:48:53 EDT 2011