batgrbproduct Analysis for Trigger=362122
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): Tue Sep 8 09:21:23 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362122/GCN5_download_cron
======================================================================
Trigger: 00362122 Segment: 000
BAT Trigger Time: 274043845.768 [s; MET]
Trigger Stop: 274043845.832 [s; MET]
UTC: 2009-09-07T19:17:20.702400 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 203.7833056999 Dec: -36.0490416936566 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.81
Image Trigger?: NO
Rate S/N Ratio: 8.54400374531753 [ if not an image trigger ]
Image S/N Ratio: 5.81
Flight Position: [ source = BAT ]
RA: 203.7833056999 Dec: -36.0490416936566 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 203.795413037761 Dec: -36.0767918975119 [deg; J2000]
{ 13h 35m 10.9s , -36d 04' 36.5" }
+/- 4.30599688315994 [arcmin] (estimated 90% radius based on SNR)
+/- 2.23830073242422 [arcmin] (formal 1-sigma fit error)
SNR: 3.7783204828256
Angular difference between Flight and Ground position is 1.765534 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000414 0.000857 0.008238 0.006072
0.001889 0.002089 0.001978 0.001985 [error]
Peak -0.000414 0.000857 0.008238 0.006072
0.001889 0.002089 0.001978 0.001985 [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 5.83e-11 4.08e-10 2.51e-09 7.73e-08 8.67e-09 8.07e-08 erg/cm2
Error 1.65e-10 5.81e-10 2.06e-09 1.03e-07 6.56e-09 1.05e-07 erg/cm2
Peak flux Power-law 2.80e-02 1.04e-01 3.19e-01 3.14e+00 8.91e-01 3.59e+00 ph/cm2/s
Error 8.14e-02 1.53e-01 2.66e-01 3.34e+00 7.19e-01 3.39e+00 ph/cm2/s
Fluence Cutoff-PL 2.59e-11 2.46e-11 3.47e-10 3.05e-09 1.97e-08 8.99e-09 erg/cm2
Error 5.41e-10 2.08e-09 1.47e-07 6.80e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.78e-02 1.03e-01 3.20e-01 3.14e+00 8.93e-01 3.59e+00 ph/cm2/s
Error 8.11e-02 1.53e-01 2.67e-01 3.85e+00 7.19e-01 3.76e+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 -0.625 1.460 - - 4.97e-03 5.54e-03 59.180 57
CPL -4.148 0.000 139.4 314.4 4.58e-02 0.00e+00 58.700 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.625 1.460 - - 4.97e-03 5.54e-03 59.180 57
CPL -4.148 0.000 139.4 314.4 4.58e-02 0.00e+00 58.700 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
203.7954 -36.0768 0.0510 29.9 -49.6 0.0145 3.8 TRIG_00362122
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.768 -5.768 (delta_t = 55.000 [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 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.625288 ( -1.70901 1.21165 )
Norm@50keV : 4.97290E-03 ( -0.00497921 0.00609761 )
------------------------------------------------------------
# Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.958080e-01
Photon flux (15-150 keV) in 0.064 sec: 0.891481 ( -0.891481 0.546176 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.67213e-09 ( -8.67213e-09 4.44913e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.14769 ( )
Epeak [keV] : 139.352 ( -129.978 498.85 )
Norm@50keV : 4.57813E-02 ( )
------------------------------------------------------------
# Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 56 degrees of freedom
# Null hypothesis probability = 3.768184e-01
Photon flux (15-150 keV) in 0.064 sec: 0.892709 ( -0.892709 0.544561 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98931e-09 ( -8.98931e-09 4.6041e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.394718 ( -0.39565 -0.39565 )
beta : 0.625011 ( -1.21239 1.70682 )
Epeak [keV] : 23.5665 ( -23.5758 -23.5758 )
Norm@50keV : 8.20015E-03 ( -0.00820202 120847 )
------------------------------------------------------------
# Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.254944e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.625288 ( -1.70901 1.21165 )
Norm@50keV : 4.97290E-03 ( -0.00497921 0.00609761 )
------------------------------------------------------------
# Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.958080e-01
Photon flux (15-150 keV) in 0.064 sec: 0.891481 ( -0.891481 0.546176 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.67213e-09 ( -8.67213e-09 4.44913e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.14769 ( )
Epeak [keV] : 139.352 ( -129.978 498.85 )
Norm@50keV : 4.57813E-02 ( )
------------------------------------------------------------
# Chi-Squared = 58.70 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 56 degrees of freedom
# Null hypothesis probability = 3.768184e-01
Photon flux (15-150 keV) in 0.064 sec: 0.892709 ( -0.892709 0.544561 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98931e-09 ( -8.98931e-09 4.6041e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.394718 ( -0.39565 -0.39565 )
beta : 0.625011 ( -1.21239 1.70682 )
Epeak [keV] : 23.5665 ( -23.5758 -23.5758 )
Norm@50keV : 8.20015E-03 ( -0.00820202 120847 )
------------------------------------------------------------
# Chi-Squared = 59.18 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.254944e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Sep 8 09:36:44 EDT 2009