batgrbproduct Analysis for Trigger=416135
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 Mar 16 19:31:11 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger416135/GCN5_download_cron
======================================================================
Trigger: 00416135 Segment: 000
BAT Trigger Time: 290436296 [s; MET]
Trigger Stop: 290436360 [s; MET]
UTC: 2010-03-16T12:44:50.380880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 107.615363831075 Dec: -56.2780007185453 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.83
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.83
Flight Position: [ source = BAT ]
RA: 107.615363831075 Dec: -56.2780007185453 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 107.599046174622 Dec: -56.2746891779951 [deg; J2000]
{ 07h 10m 23.8s , -56d 16' 28.9" }
+/- 3.03345220517181 [arcmin] (estimated 90% radius based on SNR)
+/- 1.32075594155265 [arcmin] (formal 1-sigma fit error)
SNR: 6.2321332097915
Angular difference between Flight and Ground position is 0.578738 arcmin
Partial Coding Fraction: 0.8515625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.253672 0.232467 0.103048 -0.006786
0.044604 0.043974 0.036447 0.031324 [error]
Peak 0.253672 0.232467 0.103048 -0.006786
0.044604 0.043974 0.036447 0.031324 [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 8.42e-08 9.61e-08 7.87e-08 1.08e-07 2.98e-07 3.67e-07 erg/cm2
Error 2.08e-08 2.09e-08 3.24e-08 8.54e-08 7.57e-08 1.29e-07 erg/cm2
Peak flux Power-law 4.28e-02 2.74e-02 1.13e-02 6.34e-03 8.47e-02 8.78e-02 ph/cm2/s
Error 1.03e-02 5.71e-03 4.43e-03 4.57e-03 1.64e-02 1.74e-02 ph/cm2/s
Fluence Cutoff-PL 8.34e-08 1.03e-07 6.90e-08 2.86e-08 2.75e-07 2.84e-07 erg/cm2
Error 2.15e-08 2.86e-08 5.52e-08 1.03e-07 9.01e-08 1.55e-07 erg/cm2
Peak flux Cutoff-PL 4.23e-02 2.95e-02 1.01e-02 2.02e-03 8.34e-02 8.39e-02 ph/cm2/s
Error 1.07e-02 7.98e-03 7.77e-03 5.69e-03 1.66e-02 1.33e-02 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 2.288 0.408 - - 4.89e-04 1.48e-04 55.210 57
CPL 1.711 2.278 17.4 0.0 1.16e-03 0.00e+00 54.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.276 0.395 - - 4.91e-04 1.47e-04 55.650 57
CPL 1.666 2.202 18.9 0.0 1.23e-03 0.00e+00 55.280 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
107.5990 -56.2747 0.0309 28.4 -24.1 0.5629 6.2 TRIG_00416135
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28769 ( -0.379778 0.436274 )
Norm@50keV : 4.88881E-04 ( -0.000150015 0.000146557 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 0.9686 for 57 degrees of freedom
# Null hypothesis probability = 5.426152e-01
Photon flux (15-150 keV) in 64 sec: 8.48654E-02 ( -0.0167911 0.0167945 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.98356e-07 ( -7.35648e-08 7.77811e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71088 ( -4.20589 0.350167 )
Epeak [keV] : 17.4394 ( )
Norm@50keV : 1.16150E-03 ( )
------------------------------------------------------------
# Chi-Squared = 54.88 using 59 PHA bins.
# Reduced chi-squared = 0.9799 for 56 degrees of freedom
# Null hypothesis probability = 5.174569e-01
Photon flux (15-150 keV) in 64 sec: 8.34631E-02 ( -0.0171197 0.0172279 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.74899e-07 ( -8.48883e-08 9.5351e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.65766 ( -7.51894 -7.51894 )
beta : -2.73267 ( -1.73768 0.655036 )
Epeak [keV] : 23.6726 ( -23.6406 5.32493 )
Norm@50keV : 86.0461 ( -87.787 41.5426 )
------------------------------------------------------------
# Chi-Squared = 53.34 using 59 PHA bins.
# Reduced chi-squared = 0.9699 for 55 degrees of freedom
# Null hypothesis probability = 5.381204e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.27644 ( -0.367446 0.42331 )
Norm@50keV : 4.91332E-04 ( -0.000149066 0.00014584 )
------------------------------------------------------------
# Chi-Squared = 55.65 using 59 PHA bins.
# Reduced chi-squared = 0.9764 for 57 degrees of freedom
# Null hypothesis probability = 5.257489e-01
Photon flux (15-150 keV) in 64 sec: 8.47137E-02 ( -0.0163894 0.0163968 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.99124e-07 ( -7.3401e-08 7.7657e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66620 ( -3.98225 0.4212 )
Epeak [keV] : 18.8615 ( )
Norm@50keV : 1.23416E-03 ( )
------------------------------------------------------------
# Chi-Squared = 55.28 using 59 PHA bins.
# Reduced chi-squared = 0.9871 for 56 degrees of freedom
# Null hypothesis probability = 5.021245e-01
Photon flux (15-150 keV) in 64 sec: 8.34320E-02 ( -0.0165907 0.016681 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.74787e-07 ( -8.35718e-08 9.53235e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.34878 ( -7.75109 -7.75109 )
beta : -2.73176 ( -1.68345 0.666065 )
Epeak [keV] : 23.4911 ( -23.468 5.13695 )
Norm@50keV : 52.9542 ( -53.055 27.4076 )
------------------------------------------------------------
# Chi-Squared = 53.79 using 59 PHA bins.
# Reduced chi-squared = 0.9779 for 55 degrees of freedom
# Null hypothesis probability = 5.210440e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Mar 16 19:40:56 EDT 2010