batgrbproduct analysis for trigger=377436

batgrbproduct Analysis for Trigger=377436

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 Dec  1 08:32:39 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger377436/GCN5_download_cron
======================================================================

  Trigger: 00377436      Segment: 000

  BAT Trigger Time: 281290096   [s; MET]
      Trigger Stop: 281290496   [s; MET]
               UTC: 2009-11-30T16:08:10.693340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 161.881491409738   Dec: 11.6255417298906  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.13
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.13

  Flight Position:   [ source = BAT ]
    RA: 161.881491409738   Dec: 11.6255417298906  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 161.870517357678   Dec: 11.5733394215681  [deg; J2000]  
        { 10h 47m 28.9s , +11d 34' 24.0" }
         +/- 4.50485413241736 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.2006819124117 [arcmin] (formal 1-sigma fit error)
    SNR: 3.54232791322225
 
  Angular difference between Flight and Ground position is 3.197860 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 400 +/- 
        Measured from: 0
                   to: 400     [s; relative to TRIGTIME]
     T50: 400 +/- 
        Measured from: 0
                   to: 400     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 400 second)
        Measured from: 0     
                   to: 400     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 400     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.368852   0.301226   0.206107  -0.052568
           0.077891   0.081902   0.075198   0.072444 [error]
 Peak      0.368852   0.301226   0.206107  -0.052568
           0.077891   0.081902   0.075198   0.072444 [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 8.76e-08 1.27e-07 1.36e-07 2.72e-07 4.35e-07 6.23e-07   erg/cm2
              Error 3.06e-08 3.53e-08 6.54e-08 3.09e-07 1.54e-07 3.40e-07   erg/cm2
Peak flux Power-law 1.20e-02 9.51e-03 5.07e-03 3.93e-03 2.84e-02 3.05e-02   ph/cm2/s
              Error 4.13e-03 2.56e-03 2.34e-03 4.17e-03 7.53e-03 8.57e-03   ph/cm2/s
 
Fluence   Cutoff-PL 8.55e-08 1.42e-07 1.18e-07 4.74e-08 3.80e-07 3.93e-07   erg/cm2
              Error 3.24e-08 4.92e-08 1.00e-07 2.75e-07 1.79e-07 3.68e-07   erg/cm2
Peak flux Cutoff-PL 1.16e-02 1.07e-02 4.50e-03 8.77e-04 2.75e-02 2.77e-02   ph/cm2/s
              Error 4.36e-03 3.67e-03 3.48e-03 3.74e-03 7.55e-03 8.96e-03   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 1.17e-02 1.03e-02 2.88e-02 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 4.39e-03 9.23e-03 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    1.896    0.505    -      -           1.96e-04 6.99e-05   56.270 57
CPL   1.070    1.391      41.6    0.0      6.47e-04 0.00e+00   55.560 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.908    0.495    -      -           1.97e-04 6.98e-05   57.310 57
CPL   1.095    1.066      40.7    0.0      6.46e-04 0.00e+00   56.560 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  400.000    0.000  400.000
T90   400.000    0.000  400.000
T50   400.000    0.000  400.000
Peak  400.000    0.000  400.000

Click here for the BAT GCN circular template

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  161.8705 +11.5733 0.0537   14.9  -42.5       0.7558     3.5  TRIG_00377436       
------------------------------------------
 
Foreground time interval of the image:
  0.000 235.630 (delta_t = 235.630 [sec])
237.000 243.084 (delta_t =   6.083 [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)

Flight mask-tagged light curves

Caution: Mask-weight map is always using the same on-axis map

Quad-rate summed light curves (from T0-300 to T0+1000)

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

Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89552     ( -0.472188   0.537541 )
Norm@50keV  : 1.95578E-04    ( -7.10391e-05   6.8808e-05 )
------------------------------------------------------------
# Chi-Squared =          56.27 using 59 PHA bins.
# Reduced chi-squared =         0.9872 for     57 degrees of freedom 
# Null hypothesis probability =   5.023283e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.80142E-02 ( -0.00758753  0.00759761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.34584e-07 ( -1.4719e-07  1.60745e-07 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07029     ( -1.06969   1.71248 )
Epeak [keV] : 41.6358      (   )
Norm@50keV  : 6.47176E-04    (     )
------------------------------------------------------------
# Chi-Squared =          55.56 using 59 PHA bins.
# Reduced chi-squared =         0.9921 for     56 degrees of freedom 
# Null hypothesis probability =   4.915597e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.71938E-02 ( -0.0076405  0.0038527 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.80022e-07 ( -1.68139e-07  1.90825e-07 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
0.000000 235.630000
237.000000 243.083500
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99867   ( -1449.67   -1434.68 )
beta        : -2.39765    ( -1.85415   0.703271 )
Epeak [keV] : 25.0807      ( -7.39219 6.86467 )
Norm@50keV   : 33.1245    ( -26.8059   212.827 )
------------------------------------------------------------
# Chi-Squared =          53.11 using 59 PHA bins.
# Reduced chi-squared =         0.9656 for     55 degrees of freedom 
# Null hypothesis probability =   5.472667e-01
 
Photon flux (15-150 keV)    in 241.7 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from  237.000 sec. to  243.083 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90752     ( -0.46167   0.528136 )
Norm@50keV  : 1.97173E-04    ( -7.08825e-05   6.8769e-05 )
------------------------------------------------------------
# Chi-Squared =          57.31 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     57 degrees of freedom 
# Null hypothesis probability =   4.635784e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.83871E-02 ( -0.00751949  0.00753265 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.38176e-07 ( -1.46283e-07  1.59933e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  237.000 sec. to  243.083 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09514     ( -1.09435   1.03696 )
Epeak [keV] : 40.7069      (   )
Norm@50keV  : 6.46101E-04    (     )
------------------------------------------------------------
# Chi-Squared =          56.56 using 59 PHA bins.
# Reduced chi-squared =          1.010 for     56 degrees of freedom 
# Null hypothesis probability =   4.538672e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.75407E-02 ( -0.0076021  0.0074949 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8111e-07 ( -1.6874e-07  1.91351e-07 ) ergs/cm2

Band function

Time interval is from  237.000 sec. to  243.083 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.96992   ( -75.4894   -65.4905 )
beta        : -2.38321    ( -1.90841   0.670351 )
Epeak [keV] : 24.0824      ( -5.46443 7.5631 )
Norm@50keV   : 41.7531    ( -41.8209   16.0857 )
------------------------------------------------------------
# Chi-Squared =          54.00 using 59 PHA bins.
# Reduced chi-squared =         0.9819 for     55 degrees of freedom 
# Null hypothesis probability =   5.127309e-01
 
Photon flux (15-150 keV)    in 241.7 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89552     ( -0.472188   0.537541 )
Norm@50keV  : 1.95578E-04    ( -7.10391e-05   6.8808e-05 )
------------------------------------------------------------
# Chi-Squared =          56.27 using 59 PHA bins.
# Reduced chi-squared =         0.9872 for     57 degrees of freedom 
# Null hypothesis probability =   5.023283e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.80142E-02 ( -0.00758753  0.00759761 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.34584e-07 ( -1.4719e-07  1.60745e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07029     ( -1.06969   1.71248 )
Epeak [keV] : 41.6358      (   )
Norm@50keV  : 6.47176E-04    (     )
------------------------------------------------------------
# Chi-Squared =          55.56 using 59 PHA bins.
# Reduced chi-squared =         0.9921 for     56 degrees of freedom 
# Null hypothesis probability =   4.915597e-01
 
Photon flux (15-150 keV)    in 241.7 sec: 2.71938E-02 ( -0.0076405  0.0038527 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.80022e-07 ( -1.68139e-07  1.90825e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99867   ( -1446.54   -1431.55 )
beta        : -2.39775    ( -1.85527   0.703307 )
Epeak [keV] : 25.0843      ( -7.39527 6.86077 )
Norm@50keV   : 33.0929    ( -26.7737   212.835 )
------------------------------------------------------------
# Chi-Squared =          53.11 using 59 PHA bins.
# Reduced chi-squared =         0.9656 for     55 degrees of freedom 
# Null hypothesis probability =   5.472702e-01
 
Photon flux (15-150 keV)    in 241.7 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 1.26588e-07
S(50-100 keV) = 1.36094e-07

T90 vs. Hardness ratio plot

T90                                   = 400 sec.
Hardness ratio (energy fluence ratio) = 1.07509

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.816658
Count Ratio (50-100 keV) / (15-25 keV) = 0.55878

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:

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

Time interval of the image:
0.000000 235.630000
237.000000 243.083500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
113.1017   7.1523    2.4  46.4   47.8   4.4350   4.9 ------	UNKNOWN                       
120.0502  54.0469    2.1  39.5  119.2   3.4552   5.7 ------	UNKNOWN                       
181.6041  67.5070    2.5  44.1  166.4   1.9000   4.7 ------	UNKNOWN                       
206.7369  62.1066    2.2  48.5 -178.3   2.2309   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Mon Feb 15 15:22:44 EST 2010