batgrbproduct Analysis for Trigger=429969
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 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Mon Jul 26 04:20:27 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger429969/GCN5_download_cron
======================================================================
Trigger: 00429969 Segment: 000
BAT Trigger Time: 301749880.512 [s; MET]
Trigger Stop: 301749881.536 [s; MET]
UTC: 2010-07-25T11:24:34.494340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.026558178563 Dec: 76.9548635696441 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.16
Image Trigger?: NO
Rate S/N Ratio: 12.0415945787923 [ if not an image trigger ]
Image S/N Ratio: 7.16
Flight Position: [ source = BAT ]
RA: 290.026558178563 Dec: 76.9548635696441 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.029358763584 Dec: 76.9548823129122 [deg; J2000]
{ 19h 20m 07.0s , +76d 57' 17.6" }
+/- 1.17355594879198 [arcmin] (estimated 90% radius based on SNR)
+/- 0.324853130059503 [arcmin] (formal 1-sigma fit error)
SNR: 24.2006615605843
Angular difference between Flight and Ground position is 0.037945 arcmin
Partial Coding Fraction: 0.2851562 [ including projection effects ]
Duration
T90: 199.763999938965 +/- 25.9666370298428
Measured from: 0.784000098705292
to: 200.54800003767 [s; relative to TRIGTIME]
T50: 73.0199999213219 +/- 12.6833515843613
Measured from: 64.2600001096725
to: 137.280000030994 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 132.407999992371
to: 133.407999992371 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.81200003623962
to: 226.12399995327 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.128034 4.488149 2.776862 0.673504
0.088793 0.092278 0.082586 0.072938 [error]
Peak 0.070206 0.108608 0.089170 0.025257
0.005580 0.006197 0.005802 0.004564 [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 1.37e-06 1.99e-06 2.14e-06 4.31e-06 6.84e-06 9.82e-06 erg/cm2
Error 7.33e-08 5.95e-08 8.68e-08 3.90e-07 2.00e-07 4.44e-07 erg/cm2
Peak flux Power-law 7.73e-01 8.04e-01 5.91e-01 7.00e-01 2.44e+00 2.87e+00 ph/cm2/s
Error 7.64e-02 5.06e-02 4.62e-02 1.09e-01 1.47e-01 1.80e-01 ph/cm2/s
Fluence Cutoff-PL 1.37e-06 1.99e-06 2.15e-06 4.28e-06 6.84e-06 9.79e-06 erg/cm2
Error 7.33e-08 5.96e-08 8.69e-08 3.87e-07 2.00e-07 4.42e-07 erg/cm2
Peak flux Cutoff-PL 7.39e-01 8.33e-01 6.07e-01 4.85e-01 2.42e+00 2.66e+00 ph/cm2/s
Error 8.84e-02 6.30e-02 5.18e-02 2.68e-01 0.00e+00 0.00e+00 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 1.891 0.058 - - 3.22e-03 9.46e-05 52.270 57
CPL 1.849 0.173 184.5 0.0 3.37e-03 0.00e+00 52.300 56
The chi2 of BB fit is which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.444 0.100 - - 1.98e-02 1.24e-03 61.350 57
CPL 1.144 0.387 140.2 -42.1 2.84e-02 1.39e-02 59.640 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: 141.056000 sec.
T50 in the 50-300 keV band: 115.392000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 230.936 -4.812 226.124
T90 199.764 0.784 200.548
T50 73.020 64.260 137.280
Peak 1.000 132.408 133.408
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.0294 +76.9549 0.0080 33.6 -89.8 2.0939 24.2 TRIG_00429969
------------------------------------------
Foreground time interval of the image:
-4.812 11.889 (delta_t = 16.701 [sec])
Background time interval of the image:
-239.512 -4.812 (delta_t = 234.700 [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 -4.812 sec. to 226.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89075 ( -0.057488 0.057938 )
Norm@50keV : 3.22013E-03 ( -9.47655e-05 9.43696e-05 )
------------------------------------------------------------
# Chi-Squared = 52.27 using 59 PHA bins.
# Reduced chi-squared = 0.9170 for 57 degrees of freedom
# Null hypothesis probability = 6.529265e-01
Photon flux (15-150 keV) in 230.9 sec: 0.460318 ( -0.01462 0.014693 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.83536e-06 ( -1.99982e-07 2.00535e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.812 sec. to 226.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84937 ( -0.111805 0.2349 )
Epeak [keV] : 184.495 ( )
Norm@50keV : 3.37047E-03 ( )
------------------------------------------------------------
# Chi-Squared = 52.30 using 59 PHA bins.
# Reduced chi-squared = 0.9339 for 56 degrees of freedom
# Null hypothesis probability = 6.158451e-01
Photon flux (15-150 keV) in 230.9 sec: 0.460030 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.83531e-06 ( -2.00006e-07 2.0056e-07 ) ergs/cm2
Band function
Time interval is from -4.812 sec. to 226.124 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.42025 ( 1.42025 1.42025 )
beta : -1.89758 ( 1.89758 0.0608084 )
Epeak [keV] : 31.0202 ( -31.0202 -31.0202 )
Norm@50keV : 7.15789E-03 ( -0.00715789 863216 )
------------------------------------------------------------
# Chi-Squared = 51.97 using 59 PHA bins.
# Reduced chi-squared = 0.9448 for 55 degrees of freedom
# Null hypothesis probability = 5.912774e-01
Photon flux (15-150 keV) in 230.9 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Peak spectrum fit
Power-law model
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44419 ( -0.0999262 0.100788 )
Norm@50keV : 1.98220E-02 ( -0.00123857 0.00123322 )
------------------------------------------------------------
# Chi-Squared = 61.35 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 57 degrees of freedom
# Null hypothesis probability = 3.229370e-01
Photon flux (15-150 keV) in 1 sec: 2.43929 ( -0.147155 0.147184 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.89887e-07 ( -1.32268e-08 1.32994e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14363 ( -0.428776 0.344866 )
Epeak [keV] : 140.152 ( -55.9943 -140.154 )
Norm@50keV : 2.84366E-02 ( -0.00931156 0.0185654 )
------------------------------------------------------------
# Chi-Squared = 59.64 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.448420e-01
Photon flux (15-150 keV) in 1 sec: 2.41924 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85992e-07 ( -1.4404e-08 1.4175e-08 ) ergs/cm2
Band function
Time interval is from 132.408 sec. to 133.408 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.933383 ( 0.936218 4.2187 )
beta : -1.67648 ( 1.67749 0.267873 )
Epeak [keV] : 92.5116 ( -92.9187 -92.9187 )
Norm@50keV : 3.78797E-02 ( -0.0179729 389.366 )
------------------------------------------------------------
# Chi-Squared = 58.77 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.389819e-01
Photon flux (15-150 keV) in 1 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] : ( )
R^2/D10^2 : ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : ( )
Norm : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : ( )
R1^2/D10^2 : ( )
kT2 [keV] : ( )
R2^2/D10^2 : ( )
------------------------------------------------------------
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25
25- 50
50-150
15-150
Plot creation:
Mon Jul 26 04:38:28 EDT 2010