batgrbproduct analysis for trigger=416226

batgrbproduct Analysis for Trigger=416226

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): Thu Mar 18 14:34:48 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger416226/GCN5_download_cron
======================================================================

  Trigger: 00416226      Segment: 000

  BAT Trigger Time: 290493840   [s; MET]
      Trigger Stop: 290493904   [s; MET]
               UTC: 2010-03-17T04:43:54.378900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 175.0587011447   Dec: -46.3142975362412  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7

  Flight Position:   [ source = BAT ]
    RA: 175.0587011447   Dec: -46.3142975362412  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 175.069761393636   Dec: -46.2948201023902  [deg; J2000]  
        { 11h 40m 16.7s , -46d 17' 41.4" }
         +/- 3.51920567691983 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.80534487171695 [arcmin] (formal 1-sigma fit error)
    SNR: 5.04061080865096
 
  Angular difference between Flight and Ground position is 1.255349 arcmin
 
  Partial Coding Fraction: 1.015625    [ 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     0.140835   0.178831  -0.004029   0.000463
           0.039318   0.038958   0.033509   0.029701 [error]
 Peak      0.140835   0.178831  -0.004029   0.000463
           0.039318   0.038958   0.033509   0.029701 [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 4.37e-08 4.73e-08 3.64e-08 4.59e-08 1.45e-07 1.74e-07   erg/cm2
              Error 1.53e-08 1.71e-08 2.37e-08 5.80e-08 5.91e-08 9.50e-08   erg/cm2
Peak flux Power-law 2.26e-02 1.36e-02 5.22e-03 2.68e-03 4.28e-02 4.41e-02   ph/cm2/s
              Error 7.82e-03 4.72e-03 3.10e-03 3.43e-03 1.33e-02 1.40e-02   ph/cm2/s
 
Fluence   Cutoff-PL 4.33e-08 6.43e-08 1.34e-08 1.28e-10 1.21e-07 1.21e-07   erg/cm2
              Error 1.74e-08 2.50e-08 2.27e-08 9.10e-09 4.41e-08 4.43e-08   erg/cm2
Peak flux Cutoff-PL 2.18e-02 1.87e-02 2.18e-03 1.16e-05 4.27e-02 4.27e-02   ph/cm2/s
              Error 8.69e-03 6.90e-03 3.36e-03 6.48e-04 1.24e-02 1.25e-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    2.377    0.611    -      -           2.33e-04 1.15e-04   54.430 57
CPL  -1.055    0.962      28.4   19.2      4.88e-02 9.19e+00   50.580 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.381    0.603    -      -           2.34e-04 1.15e-04   54.840 57
CPL  -0.992    0.959      28.3    0.0      4.52e-02 0.00e+00   50.960 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

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
  175.0698 -46.2948 0.0387    8.1 -177.9       0.3653     5.0  TRIG_00416226       
------------------------------------------
 
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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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)

The mask-weighted light curves based on cleaned DPHs

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: 2.37739     ( -0.543085   0.678626 )
Norm@50keV  : 2.33085E-04    ( -0.00011278   0.000117652 )
------------------------------------------------------------
# Chi-Squared =          54.43 using 59 PHA bins.
# Reduced chi-squared =         0.9548 for     57 degrees of freedom 
# Null hypothesis probability =   5.722330e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.25617E-02 ( -0.0133815  0.0134575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44781e-07 ( -5.55265e-08  6.26193e-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: -1.05522     ( 1.09671   3.02124 )
Epeak [keV] : 28.4429      ( -28.4721 9.97747 )
Norm@50keV  : 4.87657E-02    ( -0.0584344   18.33 )
------------------------------------------------------------
# Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.9032 for     56 degrees of freedom 
# Null hypothesis probability =   6.794125e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.23470E-02 ( -0.0125516  0.0126877 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21058e-07 ( -3.99846e-08  4.81318e-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       : 1.58303   ( -4.90014   -3.33755 )
beta        : -9.99848    ( 2089.56   2099.56 )
Epeak [keV] : 28.5225      ( -25.3346 9.74263 )
Norm@50keV   : 0.113840    ( -0.108596   13.272 )
------------------------------------------------------------
# Chi-Squared =          50.55 using 59 PHA bins.
# Reduced chi-squared =         0.9190 for     55 degrees of freedom 
# Null hypothesis probability =   6.452862e-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: 2.38104     ( -0.535318   0.671453 )
Norm@50keV  : 2.34090E-04    ( -0.000112545   0.000117447 )
------------------------------------------------------------
# Chi-Squared =          54.84 using 59 PHA bins.
# Reduced chi-squared =         0.9621 for     57 degrees of freedom 
# Null hypothesis probability =   5.566187e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.28378E-02 ( -0.013232  0.0133179 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45541e-07 ( -5.52491e-08  6.2411e-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: -0.992094     ( 1.03497   2.95377 )
Epeak [keV] : 28.2689      (   )
Norm@50keV  : 4.51517E-02    (     )
------------------------------------------------------------
# Chi-Squared =          50.96 using 59 PHA bins.
# Reduced chi-squared =         0.9100 for     56 degrees of freedom 
# Null hypothesis probability =   6.655560e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.27145E-02 ( -0.0123464  0.0125296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21818e-07 ( -3.99424e-08  4.79526e-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       : 1.14434   ( -2.59133   -1.16503 )
beta        : -9.37136    ( 9.99981   19.9991 )
Epeak [keV] : 28.2992      ( -10.0557 9.16318 )
Norm@50keV   : 5.79171E-02    ( -0.0623263   169.79 )
------------------------------------------------------------
# Chi-Squared =          50.95 using 59 PHA bins.
# Reduced chi-squared =         0.9263 for     55 degrees of freedom 
# Null hypothesis probability =   6.301675e-01
 
Photon flux (15-150 keV)    in 64 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: 2.37739     ( -0.543085   0.678626 )
Norm@50keV  : 2.33085E-04    ( -0.00011278   0.000117652 )
------------------------------------------------------------
# Chi-Squared =          54.43 using 59 PHA bins.
# Reduced chi-squared =         0.9548 for     57 degrees of freedom 
# Null hypothesis probability =   5.722330e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.25617E-02 ( -0.0133815  0.0134575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44781e-07 ( -5.55265e-08  6.26193e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.05522     ( 1.09671   3.02124 )
Epeak [keV] : 28.4429      ( -28.4721 9.97747 )
Norm@50keV  : 4.87657E-02    ( -0.0584344   18.33 )
------------------------------------------------------------
# Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.9032 for     56 degrees of freedom 
# Null hypothesis probability =   6.794125e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.23470E-02 ( -0.0125516  0.0126877 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21058e-07 ( -3.99846e-08  4.81318e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.11882   ( -2.5768   -1.14486 )
beta        : -9.34556    ( 9.9856   19.9847 )
Epeak [keV] : 28.4426      ( -10.9349 9.56468 )
Norm@50keV   : 5.41884E-02    ( -0.0630407   169.068 )
------------------------------------------------------------
# Chi-Squared =          50.57 using 59 PHA bins.
# Reduced chi-squared =         0.9195 for     55 degrees of freedom 
# Null hypothesis probability =   6.443364e-01
 
Photon flux (15-150 keV)    in 64 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)  = 4.73316e-08
S(50-100 keV) = 3.64375e-08

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 0.769835

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.26979
Count Ratio (50-100 keV) / (15-25 keV) = -0.0286079

Mask shadow pattern

IMX = -1.425384465099449E-01, IMY = 5.228005800361511E-03

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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 64.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6043 -40.4909    2.1  20.9   -4.2   0.4615   5.6    5.2	Vela X-1                      
170.4211 -60.5853    2.4  15.7 -110.7   0.4069   4.9    3.8	Cen X-3                       
186.6566 -62.7741    0.6  21.8 -127.1   1.5631  19.0    0.2	GX 301-2                      
 91.5128 -31.0812    2.2  56.4  -20.0   1.5733   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
100.500600 963.092700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4724 -40.5686    1.4  29.0   -5.2   4.4245   8.1    2.7	Vela X-1                      
170.2992 -60.6206    1.6  14.6  -82.9   3.2799   7.2    0.5	Cen X-3                       
186.6493 -62.7702    0.2  17.7 -109.8  22.8916  48.8    0.2	GX 301-2                      
255.9120 -37.7542   22.7  58.0 -159.1   1.9345   0.5    6.5	4U 1700-377                   
256.4913 -36.4098   11.6  59.2 -160.0   5.2532   1.0    2.8	GX 349+2                      
146.9149  -7.3822    2.9  45.8   47.2   9.1583   3.9 ------	UNKNOWN                       
106.5716 -36.1781    2.8  50.8  -16.6   4.7040   4.1 ------	UNKNOWN                       
102.6108 -31.7563    3.6  56.1  -14.5   6.1991   3.2 ------	UNKNOWN                       
255.7336 -48.7997    2.7  51.9 -147.9   7.2576   4.3 ------	UNKNOWN                       
261.8073 -49.0853    4.6  55.1 -145.0   9.2897   2.6 ------	UNKNOWN                       
257.7872 -71.5360    2.4  44.5 -118.8   9.8980   4.9 ------	UNKNOWN

Plot creation:
Thu Mar 18 15:09:53 EDT 2010