batgrbproduct Analysis for Trigger=456969
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): Sun Jul 10 19:45:34 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger456969/GCN5_download_cron
======================================================================
Trigger: 00456969 Segment: 000
BAT Trigger Time: 331940612.544 [s; MET]
Trigger Stop: 331940614.592 [s; MET]
UTC: 2011-07-09T21:43:25.403800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 164.647029809365 Dec: -23.4640038678624 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 18.78
Image Trigger?: NO
Rate S/N Ratio: 39.2683078321437 [ if not an image trigger ]
Image S/N Ratio: 18.78
Flight Position: [ source = BAT ]
RA: 164.647029809365 Dec: -23.4640038678624 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 164.655318088625 Dec: -23.455801096036 [deg; J2000]
{ 10h 58m 37.3s , -23d 27' 20.9" }
+/- 0.672553503216482 [arcmin] (estimated 90% radius based on SNR)
+/- 0.15615439945313 [arcmin] (formal 1-sigma fit error)
SNR: 53.6071718046783
Angular difference between Flight and Ground position is 0.671071 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 259.24799990654 +/- 8.81557891201711
Measured from: -70.975999891758
to: 188.272000014782 [s; relative to TRIGTIME]
T50: 64.067999958992 +/- 3.66899497579645
Measured from: -20.0279999375343
to: 44.0400000214577 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.05999994277954
to: 2.05999994277954 [s; relative to TRIGTIME]
Total Fluence
Measured from: -127.072000026703
to: 210.315999984741 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.041084 8.352831 6.741114 1.634158
0.109432 0.114972 0.104612 0.093567 [error]
Peak 0.119470 0.180907 0.163173 0.046550
0.007559 0.008547 0.008142 0.006263 [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 1.77e-06 3.37e-06 4.95e-06 1.56e-05 1.40e-05 2.57e-05 erg/cm2
Error 7.37e-08 7.97e-08 1.14e-07 8.57e-07 2.83e-07 9.03e-07 erg/cm2
Peak flux Power-law 1.07e+00 1.24e+00 1.04e+00 1.46e+00 3.87e+00 4.81e+00 ph/cm2/s
Error 1.01e-01 7.16e-02 6.46e-02 1.92e-01 2.02e-01 2.64e-01 ph/cm2/s
Fluence Cutoff-PL 1.67e-06 3.40e-06 5.04e-06 1.18e-05 1.38e-05 2.19e-05 erg/cm2
Error 1.00e-07 8.35e-08 1.31e-07 2.28e-06 3.19e-07 2.29e-06 erg/cm2
Peak flux Cutoff-PL 1.01e+00 1.27e+00 1.06e+00 1.07e+00 3.82e+00 4.41e+00 ph/cm2/s
Error 1.22e-01 8.10e-02 7.39e-02 4.12e-01 2.09e-01 4.62e-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 1.444 0.038 - - 4.33e-03 8.40e-05 53.120 57
CPL 1.226 0.157 201.3 189.0 5.40e-03 8.43e-04 47.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.259 0.090 - - 3.27e-02 1.68e-03 49.930 57
CPL 0.986 0.335 195.2 -56.2 4.44e-02 1.69e-02 48.000 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: 255.552000 sec.
T50 in the 50-300 keV band: 53.504000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 337.388 -127.072 210.316
T90 259.248 -70.976 188.272
T50 64.068 -20.028 44.040
Peak 1.000 1.060 2.060
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
164.6553 -23.4558 0.0036 0.0 -6.3 22.3819 53.6 TRIG_00456969
------------------------------------------
Foreground time interval of the image:
-127.072 210.316 (delta_t = 337.388 [sec])
Background time interval of the image:
-239.544 -127.072 (delta_t = 112.472 [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 -127.072 sec. to 210.316 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44415 ( -0.0380113 0.0379878 )
Norm@50keV : 4.33043E-03 ( -8.39775e-05 8.39694e-05 )
------------------------------------------------------------
# Chi-Squared = 53.12 using 59 PHA bins.
# Reduced chi-squared = 0.9320 for 57 degrees of freedom
# Null hypothesis probability = 6.212431e-01
Photon flux (15-150 keV) in 337.4 sec: 0.532896 ( -0.0117483 0.0117882 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39967e-05 ( -2.82381e-07 2.82678e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -127.072 sec. to 210.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22573 ( -0.159862 0.154582 )
Epeak [keV] : 201.254 ( -61.0475 316.884 )
Norm@50keV : 5.40164E-03 ( -0.000764453 0.000922183 )
------------------------------------------------------------
# Chi-Squared = 47.27 using 59 PHA bins.
# Reduced chi-squared = 0.8441 for 56 degrees of freedom
# Null hypothesis probability = 7.905476e-01
Photon flux (15-150 keV) in 337.4 sec: 0.522936 ( -0.013457 0.01353 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37944e-05 ( -3.19552e-07 3.18067e-07 ) ergs/cm2
Band function
Time interval is from -127.072 sec. to 210.316 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21333 ( -0.151598 0.360981 )
beta : -1.72656 ( 1.68936 0.224186 )
Epeak [keV] : 193.160 ( -138.248 310.968 )
Norm@50keV : 5.46873E-03 ( -0.000763984 0.0106636 )
------------------------------------------------------------
# Chi-Squared = 47.23 using 59 PHA bins.
# Reduced chi-squared = 0.8587 for 55 degrees of freedom
# Null hypothesis probability = 7.625323e-01
Photon flux (15-150 keV) in 337.4 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] : 17.8665 ( )
R^2/D10^2 : 3.20086E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 509.23 using 59 PHA bins.
# Reduced chi-squared = 8.9339 for 57 degrees of freedom
# Null hypothesis probability = 7.486409e-74
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.919e-07 2.750e-08
25- 50 3.182e-06 8.654e-08
50-150 7.358e-06 2.514e-07
15-150 1.123e-05 2.463e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.984 ( )
Norm : 2.21397 (-0.0429401 0.0429401)
------------------------------------------------------------
# Chi-Squared = 89.35 using 59 PHA bins.
# Reduced chi-squared = 1.567 for 57 degrees of freedom
# Null hypothesis probability = 3.983297e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.861e-06 9.419e-07
25- 50 3.579e-06 1.808e-06
50-150 7.849e-06 3.978e-06
15-150 1.329e-05 6.728e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.51628 (-0.625413 0.669659)
R1^2/D10^2 : 0.382436 (-0.0955996 0.137399)
kT2 [keV] : 27.8999 (-1.87836 2.33046)
R2^2/D10^2 : 5.72379E-03 (-0.00143451 0.00166237)
------------------------------------------------------------
# Chi-Squared = 56.28 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.269150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.499e-06 1.107e-07
25- 50 3.432e-06 1.419e-07
50-150 8.696e-06 3.610e-07
15-150 1.363e-05 4.859e-07
Peak spectrum fit
Power-law model
Time interval is from 1.060 sec. to 2.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25856 ( -0.0896495 0.0895674 )
Norm@50keV : 3.26787E-02 ( -0.00168457 0.00168293 )
------------------------------------------------------------
# Chi-Squared = 49.93 using 59 PHA bins.
# Reduced chi-squared = 0.8760 for 57 degrees of freedom
# Null hypothesis probability = 7.351490e-01
Photon flux (15-150 keV) in 1 sec: 3.87045 ( -0.201549 0.201678 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.26314e-07 ( -1.91066e-08 1.9206e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.060 sec. to 2.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.986038 ( -0.36184 0.307757 )
Epeak [keV] : 195.188 ( -82.8009 -195.188 )
Norm@50keV : 4.43581E-02 ( -0.0124619 0.0214152 )
------------------------------------------------------------
# Chi-Squared = 48.00 using 59 PHA bins.
# Reduced chi-squared = 0.8572 for 56 degrees of freedom
# Null hypothesis probability = 7.675827e-01
Photon flux (15-150 keV) in 1 sec: 3.82472 ( -0.2092 0.209 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.20144e-07 ( -2.0898e-08 2.0779e-08 ) ergs/cm2
Band function
Time interval is from 1.060 sec. to 2.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.23157 ( -1.79449 -1.1111 )
beta : -1.32373 ( -5.32652 0.112547 )
Epeak [keV] : 30.4060 ( -10.5036 253.134 )
Norm@50keV : 12.6753 ( -12.6753 821.418 )
------------------------------------------------------------
# Chi-Squared = 46.89 using 59 PHA bins.
# Reduced chi-squared = 0.8525 for 55 degrees of freedom
# Null hypothesis probability = 7.735496e-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] : 17.5213 ( )
R^2/D10^2 : 0.270238 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 122.71 using 59 PHA bins.
# Reduced chi-squared = 2.1528 for 57 degrees of freedom
# Null hypothesis probability = 1.023694e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.675e-08 1.735e-09
25- 50 7.589e-08 5.245e-09
50-150 1.679e-07 1.680e-08
15-150 2.605e-07 1.625e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.994 ( )
Norm : 15.8774 (-15.8774 -15.8774)
------------------------------------------------------------
# Chi-Squared = 76.23 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.535579e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.953e-08 2.063e-08
25- 50 7.603e-08 3.937e-08
50-150 1.668e-07 8.580e-08
15-150 2.823e-07 1.470e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.52674 (-1.38958 1.66482)
R1^2/D10^2 : 2.60408 (-1.17366 2.4763)
kT2 [keV] : 29.4153 (-4.64308 8.01616)
R2^2/D10^2 : 4.02599E-02 (-0.0220868 0.0328781)
------------------------------------------------------------
# Chi-Squared = 47.72 using 59 PHA bins.
# Reduced chi-squared = 0.8677 for 55 degrees of freedom
# Null hypothesis probability = 7.462719e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.091e-08 6.540e-09
25- 50 7.362e-08 1.202e-08
50-150 2.163e-07 5.020e-08
15-150 3.209e-07 6.540e-08
Plot creation:
Sun Jul 10 20:02:18 EDT 2011