batgrbproduct analysis for trigger=361020

batgrbproduct Analysis for Trigger=361020

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): Tue May 31 17:54:05 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger361020/SDC
======================================================================

  Trigger: 00361020      Segment: 000

  BAT Trigger Time: 273085773.824   [s; MET]
      Trigger Stop: 273085775.872   [s; MET]
               UTC: 2009-08-27T17:09:28.789720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 307.209098100512   Dec: 44.0833551698385  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.66
     Image Trigger?:     NO
     Rate S/N Ratio:     6.557438524302  [ if not an image trigger ]
     Image S/N Ratio:    5.66

  Flight Position:   [ source = BAT ]
    RA: 307.209098100512   Dec: 44.0833551698385  [deg; J2000]


  Partial Coding Fraction:     [ including projection effects ]

 
  Angular difference between Flight and Ground position is 0.000000 arcmin
 
  Partial Coding Fraction:     [ including projection effects ]

  Duration
     T90: 0.519999980926514 +/- 0.212941338292076
        Measured from: 1246.96799999475
                   to: 1247.48799997568     [s; relative to TRIGTIME]
     T50: 0.331999957561493 +/- 0.246876481357428
        Measured from: 1247.0680000186
                   to: 1247.39999997616     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1246.73199999332     
                   to: 1247.73199999332     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1246.94800001383     
                   to: 1247.51599997282     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.023100   0.014955   0.012780   0.023134
           0.009911   0.009411   0.008945   0.007682 [error]
 Peak     -0.001147  -0.002694   0.017709   0.017180
           0.013115   0.012885   0.011771   0.010743 [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 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 Power-law 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
 
Fluence   Cutoff-PL 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 Cutoff-PL 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
 
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    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
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    0.568 1246.948 1247.516
T90     0.520 1246.968 1247.488
T50     0.332 1247.068 1247.400
Peak    1.000 1246.732 1247.732

Click here for the BAT GCN circular template

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

 
Foreground time interval of the image:
Background time interval of the image:

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 1246.948 sec. to 1247.516 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Cutoff power-law model

Time interval is from 1246.948 sec. to 1247.516 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file)            
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Band function

Time interval is from 1246.948 sec. to 1247.516 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file)      
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Peak spectrum fit

Power-law model

Time interval is from 1246.732 sec. to 1247.732 sec.
Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Cutoff power-law model

Time interval is from 1246.732 sec. to 1247.732 sec.
Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file)            
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Band function

Time interval is from 1246.732 sec. to 1247.732 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file)      
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Single BB

Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Thermal bremsstrahlung (OTTB)

Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Double BB

Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

Cutoff power-law model

Band function

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 
S(50-100 keV) =

T90 vs. Hardness ratio plot

T90                                   = 0.519999980926514 sec.
Hardness ratio (energy fluence ratio) =

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.647403
Count Ratio (50-100 keV) / (15-25 keV) = 0.553247

Mask shadow pattern

IMX = 0, IMY = 0

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-60.824000 35.876610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5967  35.1864    0.5  33.2  170.7   3.3708  22.7    1.0	Cyg X-1                       
308.1132  40.8953    2.1  25.3  179.0   0.6287   5.4    3.4	Cyg X-3                       
326.3821  38.4498    0.0  11.6  166.2   0.2576   2.3   12.5	Cyg X-2                       
 49.9366  33.6085    3.8  54.3  -33.2   1.8583   3.1 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:

Post-slew image of 15-350 keV band

Time interval of the image:
92.076600 302.183100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3363  35.4765   31.9  40.8 -139.6  -0.1380  -0.4   10.0	Her X-1                       
288.8055  10.9311    0.9  36.8  155.1   4.2860  12.3    1.0	GRS 1915+105                  
299.5854  35.2035    0.3  10.7  159.8   8.0963  44.5    0.3	Cyg X-1                       
308.0637  40.9680    1.8   3.2  112.3   1.2090   6.5    2.3	Cyg X-3                       
326.1913  38.4876    9.8  15.3   48.9   0.2341   1.2   10.0	Cyg X-2                       
283.8096  -3.2277    2.6  51.8  154.2   4.2562   4.4 ------	UNKNOWN                       
282.2254  -4.1308    2.9  53.2  155.6   3.9883   4.0 ------	UNKNOWN                       
264.6178   0.9660    2.3  57.3  177.4   6.2351   4.9 ------	UNKNOWN                       
277.3142  19.6819    3.1  34.9  179.1   0.8733   3.7 ------	UNKNOWN                       
 31.4119  48.4320    2.6  55.3   -2.8   3.3268   4.5 ------	UNKNOWN                       
241.9992  72.8441    2.4  41.1  -80.2   3.9661   4.7 ------	UNKNOWN

Plot creation:
Tue May 31 18:13:46 EDT 2011