batgrbproduct Analysis for Trigger=382180
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): Fri Jan 8 13:33:47 EST 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger382180/GCN5_download_cron
======================================================================
Trigger: 00382180 Segment: 000
BAT Trigger Time: 284605136 [s; MET]
Trigger Stop: 284605264 [s; MET]
UTC: 2010-01-08T00:58:50.581300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 285.417511258385 Dec: 1.43183981352239 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.53
Flight Position: [ source = BAT ]
RA: 285.417511258385 Dec: 1.43183981352239 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 285.422212633093 Dec: 1.40363833812492 [deg; J2000]
{ 19h 01m 41.3s , +01d 24' 13.1" }
+/- 2.87395375710672 [arcmin] (estimated 90% radius based on SNR)
+/- 1.34914935677249 [arcmin] (formal 1-sigma fit error)
SNR: 6.73204904910483
Angular difference between Flight and Ground position is 1.715426 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 332.755999922752 +/- 38.6043447003091
Measured from: -107.471999883652
to: 225.284000039101 [s; relative to TRIGTIME]
T50: 189.971999943256 +/- 35.5210342718224
Measured from: -4.50399988889694
to: 185.468000054359 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 243.188000023365
to: 244.188000023365 [s; relative to TRIGTIME]
Total Fluence
Measured from: -137.472000002861
to: 263.944000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.742084 0.172882 0.309685 0.071328
0.163181 0.162122 0.141174 0.122558 [error]
Peak 0.035780 0.011217 0.017363 0.007629
0.007981 0.008235 0.007091 0.006117 [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 1.19e-06 2.55e-07 2.74e-08 3.24e-09 1.48e-06 1.48e-06 erg/cm2
Error 1.42e-07 7.30e-08 1.78e-08 4.27e-09 1.86e-07 1.86e-07 erg/cm2
Peak flux Power-law 3.15e-01 2.00e-01 8.23e-02 4.59e-02 6.20e-01 6.43e-01 ph/cm2/s
Error 1.51e-01 7.90e-02 7.73e-02 8.51e-02 2.03e-01 2.19e-01 ph/cm2/s
Fluence Cutoff-PL 1.30e-06 1.32e-07 7.17e-11 2.52e-18 1.43e-06 1.43e-06 erg/cm2
Error 1.53e-07 4.85e-08 3.23e-10 2.95e-15 1.65e-07 1.65e-07 erg/cm2
Peak flux Cutoff-PL 3.15e-01 2.00e-01 8.21e-02 4.54e-02 6.20e-01 6.42e-01 ph/cm2/s
Error 1.51e-01 7.91e-02 7.72e-02 8.44e-02 2.03e-01 2.18e-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 5.218 0.513 - - 6.14e-05 3.20e-05 75.850 57
CPL 1.000 0.000 50.0 0.0 1.11e-03 0.00e+00 210.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.280 1.019 - - 3.59e-03 2.17e-03 56.610 57
CPL 2.074 0.000 34.3 0.0 3.56e-03 0.00e+00 56.610 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 401.416 -137.472 263.944
T90 332.756 -107.472 225.284
T50 189.972 -4.504 185.468
Peak 1.000 243.188 244.188
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
285.4222 +1.4036 0.0286 32.2 -52.2 4.3570 6.7 TRIG_00382180
------------------------------------------
Foreground time interval of the image:
-137.472 245.201 (delta_t = 382.673 [sec])
Background time interval of the image:
-239.000 -137.472 (delta_t = 101.528 [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 -137.472 sec. to 263.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.21751 ( -0.495752 0.529421 )
Norm@50keV : 6.13927E-05 ( -2.598e-05 3.79922e-05 )
------------------------------------------------------------
# Chi-Squared = 75.85 using 59 PHA bins.
# Reduced chi-squared = 1.331 for 57 degrees of freedom
# Null hypothesis probability = 4.821427e-02
Photon flux (15-150 keV) in 401.4 sec: 0.116748 ( -0.0138134 0.0138153 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.47531e-06 ( -1.844e-07 1.8671e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -137.472 sec. to 263.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.10592E-03 ( )
------------------------------------------------------------
# Chi-Squared = 210.56 using 59 PHA bins.
# Reduced chi-squared = 3.7599 for 56 degrees of freedom
# Null hypothesis probability = 9.357628e-20
Photon flux (15-150 keV) in 401.4 sec: 0.116637 ( -0.013803 0.013803 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43192e-06 ( -1.64586e-07 1.64891e-07 ) ergs/cm2
Band function
Time interval is from -137.472 sec. to 263.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.97464 ( -0.00480173 0.00477976 )
beta : -8.91509 ( 6.94064 16.7621 )
Epeak [keV] : 0.154333 ( -0.154618 0.0345302 )
Norm@50keV : 3.50683E-02 ( -0.0155302 0.016186 )
------------------------------------------------------------
# Chi-Squared = 69.60 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 55 degrees of freedom
# Null hypothesis probability = 8.894235e-02
Photon flux (15-150 keV) in 401.4 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 243.188 sec. to 244.188 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28042 ( -0.84178 1.1966 )
Norm@50keV : 3.58513E-03 ( -0.00231541 0.00202361 )
------------------------------------------------------------
# Chi-Squared = 56.61 using 59 PHA bins.
# Reduced chi-squared = 0.9931 for 57 degrees of freedom
# Null hypothesis probability = 4.898229e-01
Photon flux (15-150 keV) in 1 sec: 0.620310 ( -0.20335 0.203131 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41351e-08 ( -1.56673e-08 1.75861e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 243.188 sec. to 244.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07385 ( )
Epeak [keV] : 34.2718 ( )
Norm@50keV : 3.56202E-03 ( )
------------------------------------------------------------
# Chi-Squared = 56.61 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 56 degrees of freedom
# Null hypothesis probability = 4.520363e-01
Photon flux (15-150 keV) in 1 sec: 0.619936 ( -0.203368 0.203083 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41033e-08 ( -1.56585e-08 1.7591e-08 ) ergs/cm2
Band function
Time interval is from 243.188 sec. to 244.188 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.59655 ( 1.60419 1.60419 )
beta : -2.24824 ( 2.26209 0.822331 )
Epeak [keV] : 10.0869 ( -8.54432 -8.54432 )
Norm@50keV : 1.45568E-02 ( -0.0157042 0.791044 )
------------------------------------------------------------
# Chi-Squared = 56.61 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.146822e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Jan 8 13:44:29 EST 2010