batgrbproduct Analysis for Trigger=360137
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.45
Process Start Time (local time): Mon Aug 17 03:06:09 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger360137/GCN5_download_cron
======================================================================
Trigger: 00360137 Segment: 000
BAT Trigger Time: 272143303.616 [s; MET]
Trigger Stop: 272143304.64 [s; MET]
UTC: 2009-08-16T19:21:38.612620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.347595157943 Dec: 41.4064048449191 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.61
Image Trigger?: NO
Rate S/N Ratio: 6 [ if not an image trigger ]
Image S/N Ratio: 5.61
Flight Position: [ source = BAT ]
RA: 288.347595157943 Dec: 41.4064048449191 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 288.372325135652 Dec: 41.3985097381525 [deg; J2000]
{ 19h 13m 29.4s , +41d 23' 54.6" }
+/- 2.95286242325328 [arcmin] (estimated 90% radius based on SNR)
+/- 1.72195170371683 [arcmin] (formal 1-sigma fit error)
SNR: 6.47652969454852
Angular difference between Flight and Ground position is 1.209588 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 1.02400004863739 +/- 0.325650151505242
Measured from: -0.1839998960495
to: 0.840000152587891 [s; relative to TRIGTIME]
T50: 0.575999975204468 +/- 0.320000016689304
Measured from: 0.104000151157379
to: 0.680000126361847 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.195999979972839
to: 0.804000020027161 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.23199999332428
to: 0.967999994754791 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.011745 0.032182 0.016883 0.002517
0.006501 0.006788 0.005752 0.004740 [error]
Peak 0.013130 0.028172 0.014601 0.000792
0.005853 0.006203 0.005285 0.004375 [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 5.18e-09 9.27e-09 1.27e-08 3.63e-08 3.67e-08 6.35e-08 erg/cm2
Error 2.30e-09 2.85e-09 5.11e-09 2.97e-08 1.27e-08 3.45e-08 erg/cm2
Peak flux Power-law 1.51e-01 1.49e-01 1.03e-01 1.13e-01 4.49e-01 5.17e-01 ph/cm2/s
Error 6.73e-02 4.60e-02 4.00e-02 8.43e-02 1.36e-01 1.60e-01 ph/cm2/s
Fluence Cutoff-PL 4.24e-09 1.21e-08 1.19e-08 2.53e-09 3.04e-08 3.07e-08 erg/cm2
Error 2.51e-09 4.52e-09 9.47e-09 1.87e-08 1.31e-08 2.36e-08 erg/cm2
Peak flux Cutoff-PL 1.21e-01 1.94e-01 9.96e-02 1.06e-02 4.25e-01 4.25e-01 ph/cm2/s
Error 7.28e-02 7.32e-02 7.77e-02 5.86e-02 1.36e-01 1.41e-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 1.541 0.475 - - 3.25e-03 1.04e-03 59.820 57
CPL -0.688 3.264 51.5 246.0 5.94e-02 8.99e+00 56.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.530 0.470 - - 3.56e-03 1.13e-03 55.660 57
CPL -0.729 0.769 51.2 209.2 6.83e-02 9.61e+00 52.790 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 1.200 -0.232 0.968
T90 1.024 -0.184 0.840
T50 0.576 0.104 0.680
Peak 1.000 -0.196 0.804
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
288.3723 +41.3985 0.0296 14.7 -79.9 0.0764 6.5 TRIG_00360137
------------------------------------------
Foreground time interval of the image:
-0.232 0.968 (delta_t = 1.200 [sec])
Background time interval of the image:
-34.415 -0.232 (delta_t = 34.183 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 -0.232 sec. to 0.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54073 ( -0.466046 0.483873 )
Norm@50keV : 3.25041E-03 ( -0.00104782 0.00103121 )
------------------------------------------------------------
# Chi-Squared = 59.82 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.736843e-01
Photon flux (15-150 keV) in 1.2 sec: 0.410281 ( -0.124921 0.125144 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6747e-08 ( -1.2416e-08 1.29222e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.232 sec. to 0.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.687622 ( -4.25773 2.26998 )
Epeak [keV] : 51.5387 ( -16.5804 475.351 )
Norm@50keV : 5.94052E-02 ( -0.061769 17.9271 )
------------------------------------------------------------
# Chi-Squared = 56.97 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.388561e-01
Photon flux (15-150 keV) in 1.2 sec: 0.389239 ( -0.123392 0.126311 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04424e-08 ( -1.17368e-08 1.44121e-08 ) ergs/cm2
Band function
Time interval is from -0.232 sec. to 0.968 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98432 ( -133.812 -123.812 )
beta : -2.40776 ( -3.42906 0.875127 )
Epeak [keV] : 35.0905 ( -9.85358 10.3376 )
Norm@50keV : 55.2150 ( -55.2153 20.3957 )
------------------------------------------------------------
# Chi-Squared = 55.34 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.618384e-01
Photon flux (15-150 keV) in 1.2 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] : 11.6337 (-2.8043 4.13148)
R^2/D10^2 : 0.139205 (-0.0941964 0.240001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 52.53 using 59 PHA bins.
# Reduced chi-squared = 0.9217 for 57 degrees of freedom
# Null hypothesis probability = 6.431097e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.179e-09 2.257e-09
25- 50 1.267e-08 7.393e-09
50-150 1.010e-08 6.759e-09
15-150 2.695e-08 1.601e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 123.503 ( )
Norm : 1.99669 (-0.610359 0.849833)
------------------------------------------------------------
# Chi-Squared = 54.76 using 59 PHA bins.
# Reduced chi-squared = 0.9608 for 57 degrees of freedom
# Null hypothesis probability = 5.594315e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.006e-09 3.101e-09
25- 50 9.568e-09 5.660e-09
50-150 2.061e-08 1.260e-08
15-150 3.519e-08 2.153e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 23.9648 ( )
R1^2/D10^2 : 3.64174E-03 (-0.00362334 0.341759)
kT2 [keV] : 9.72742 (-9.73094 8.06908)
R2^2/D10^2 : 0.208740 (-0.208725 -0.208725)
------------------------------------------------------------
# Chi-Squared = 52.08 using 59 PHA bins.
# Chi-Squared = 52.05 using 59 PHA bins.
# Reduced chi-squared = 0.9470 for 55 degrees of freedom
# Reduced chi-squared = 0.9463 for 55 degrees of freedom
# Null hypothesis probability = 5.867618e-01
# Null hypothesis probability = 5.882426e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.552e-09 5.130e-09
25- 50 1.214e-08 1.661e-08
50-150 1.353e-08 2.343e-08
15-150 3.022e-08 3.445e-08
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.200 sec. to 0.808 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52982 ( -0.461465 0.479057 )
Norm@50keV : 3.56493E-03 ( -0.00114221 0.00112405 )
------------------------------------------------------------
# Chi-Squared = 55.66 using 59 PHA bins.
# Reduced chi-squared = 0.9765 for 57 degrees of freedom
# Null hypothesis probability = 5.253822e-01
Photon flux (15-150 keV) in 1.008 sec: 0.448627 ( -0.13544 0.135622 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.39162e-08 ( -1.1421e-08 1.18956e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.200 sec. to 0.808 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.729372 ( 0.77036 2.30891 )
Epeak [keV] : 51.1621 ( -15.9207 402.393 )
Norm@50keV : 6.82640E-02 ( -0.0776749 19.1437 )
------------------------------------------------------------
# Chi-Squared = 52.79 using 59 PHA bins.
# Reduced chi-squared = 0.9426 for 56 degrees of freedom
# Null hypothesis probability = 5.972810e-01
Photon flux (15-150 keV) in 1.008 sec: 0.424953 ( -0.134549 0.137588 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.76522e-08 ( -1.03378e-08 1.35494e-08 ) ergs/cm2
Band function
Time interval is from -0.200 sec. to 0.808 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97517 ( -88.9259 -78.9261 )
beta : -2.37911 ( -5.42626 0.876194 )
Epeak [keV] : 35.2143 ( -11.2544 11.0428 )
Norm@50keV : 57.8376 ( -10.3406 24.3067 )
------------------------------------------------------------
# Chi-Squared = 51.34 using 59 PHA bins.
# Reduced chi-squared = 0.9335 for 55 degrees of freedom
# Null hypothesis probability = 6.151504e-01
Photon flux (15-150 keV) in 1.008 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] : 11.3679 (-2.68089 3.96292)
R^2/D10^2 : 0.156139 (-0.10504 0.260423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 55.82 using 59 PHA bins.
# Reduced chi-squared = 0.9792 for 57 degrees of freedom
# Null hypothesis probability = 5.195435e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.240e-09 2.368e-09
25- 50 1.250e-08 7.338e-09
50-150 9.353e-09 6.251e-09
15-150 2.609e-08 1.488e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 119.305 (-51.706 -100.313)
Norm : 2.06239 (-0.63504 0.885167)
------------------------------------------------------------
# Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.215162e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.373e-09 1.832e-09
25- 50 9.603e-09 3.300e-09
50-150 1.709e-08 5.095e-09
15-150 3.206e-08 1.016e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 26.1431 (-25.9825 -25.9825)
R1^2/D10^2 : 2.40851E-03 (-0.00253091 0.379291)
kT2 [keV] : 9.87869 (-9.83564 5.04816)
R2^2/D10^2 : 0.216382 (-0.2189 -0.2189)
------------------------------------------------------------
# Chi-Squared = 55.35 using 59 PHA bins.
# Reduced chi-squared = 1.006 for 55 degrees of freedom
# Null hypothesis probability = 4.615085e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.561e-09 3.156e-09
25- 50 1.208e-08 1.143e-08
50-150 1.341e-08 1.442e-08
15-150 3.006e-08 2.744e-08
Plot creation:
Mon Aug 17 03:22:43 EDT 2009