batgrbproduct analysis for trigger=349718

batgrbproduct Analysis for Trigger=349718

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 v2.44
    Process Start Time (local time): Wed Apr 22 11:25:56 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger349718/GCN5_download_cron
======================================================================

  Trigger: 00349718      Segment: 000

  BAT Trigger Time: 261991824.128   [s; MET]
      Trigger Stop: 261991828.224   [s; MET]
               UTC: 2009-04-21T07:30:19.451160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 311.382173194411   Dec: -72.5775125348574  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.79
     Image Trigger?:     NO
     Rate S/N Ratio:     14.9666295470958  [ if not an image trigger ]
     Image S/N Ratio:    5.79

  Flight Position:   [ source = BAT ]
    RA: 311.382173194411   Dec: -72.5775125348574  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 311.333313507712   Dec: -72.5973756585196  [deg; J2000]  
        { 20h 45m 20.0s , -72d 35' 50.6" }
         +/- 3.6062732183693 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.99406277926859 [arcmin] (formal 1-sigma fit error)
    SNR: 4.86766119079454
 
  Angular difference between Flight and Ground position is 1.479854 arcmin
 
  Partial Coding Fraction: 0.765625    [ including projection effects ]

  Duration
     T90: 4.09600001573563 +/- 
        Measured from: 0
                   to: 4.09600001573563     [s; relative to TRIGTIME]
     T50: 4.09600001573563 +/- 
        Measured from: 0
                   to: 4.09600001573563     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 4.09600001573563 second)
        Measured from: 0     
                   to: 4.09600001573563     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 4.09600001573563     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.072458   0.036197  -0.004869   0.006665
           0.014043   0.012405   0.010619   0.009425 [error]
 Peak      0.072458   0.036197  -0.004869   0.006665
           0.014043   0.012405   0.010619   0.009425 [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 1.94e-08 1.50e-08 7.78e-09 5.83e-09 4.48e-08 4.80e-08   erg/cm2
              Error 6.40e-09 6.37e-09 6.43e-09 9.38e-09 1.79e-08 2.27e-08   erg/cm2
Peak flux Power-law 1.57e-01 6.88e-02 1.80e-02 5.81e-03 2.48e-01 2.50e-01   ph/cm2/s
              Error 5.12e-02 2.77e-02 1.42e-02 9.06e-03 7.63e-02 7.77e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.97e-08 1.86e-08 2.50e-09 1.63e-11 4.08e-08 4.08e-08   erg/cm2
              Error 7.22e-09 8.81e-09 5.45e-09 2.43e-09 1.41e-08 1.41e-08   erg/cm2
Peak flux Cutoff-PL 1.57e-01 8.74e-02 6.42e-03 2.19e-05 2.51e-01 2.51e-01   ph/cm2/s
              Error 5.73e-02 3.85e-02 1.26e-02 1.73e-03 7.30e-02 7.30e-02   ph/cm2/s
 
Fluence        Band 2.06e-08 1.55e-08 6.41e-09 3.60e-09 4.46e-08 4.80e-08   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 1.58e-01 8.34e-02 9.44e-03 1.47e-04 2.51e-01 2.50e-01   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    2.946    0.745    -      -           9.33e-04 7.80e-04   53.690 57
CPL   0.007    0.995      20.2   15.2      1.08e-01 1.40e+02   51.140 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.934    0.728    -      -           9.43e-04 7.84e-04   54.070 57
CPL  -0.000    1.010      20.2    0.0      1.10e-01 0.00e+00   51.410 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    4.096    0.000    4.096
T90     4.096    0.000    4.096
T50     4.096    0.000    4.096
Peak    4.096    0.000    4.096

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
  311.3333 -72.5974 0.0392   26.7 -133.9       0.1265     4.9  TRIG_00349718       
------------------------------------------
 
Foreground time interval of the image:
  0.000   4.096 (delta_t =   4.096 [sec])
Background time interval of the image:
-60.128 -16.128 (delta_t =  44.000 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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 4.096000

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 4.096000

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

Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.94594     ( -0.637051   0.852537 )
Norm@50keV  : 9.32830E-04    ( -0.00093297   0.000627471 )
------------------------------------------------------------
# Chi-Squared =          53.69 using 59 PHA bins.
# Reduced chi-squared =         0.9418 for     57 degrees of freedom 
# Null hypothesis probability =   6.002040e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.246804 ( -0.0773852  0.0778524 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.48172e-08 ( -1.6782e-08  1.89953e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.54916E-03     ( 0.0346847   2.02463 )
Epeak [keV] : 20.2067      ( -20.4413 9.99286 )
Norm@50keV  : 0.107582    ( -0.129783   280.778 )
------------------------------------------------------------
# Chi-Squared =          51.14 using 59 PHA bins.
# Reduced chi-squared =         0.9132 for     56 degrees of freedom 
# Null hypothesis probability =   6.589356e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.248849 ( -0.074299  0.074719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08158e-08 ( -1.32638e-08  1.49447e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 7.83908E-03   ( 1.35997   1.35997 )
beta        : -9.37167    ( 5.67065   3.08428 )
Epeak [keV] : 20.0301      ( -11.8591 53.2207 )
Norm@50keV   : 0.113419    ( -0.0799173   146606 )
------------------------------------------------------------
# Chi-Squared =          51.14 using 59 PHA bins.
# Reduced chi-squared =         0.9298 for     55 degrees of freedom 
# Null hypothesis probability =   6.228246e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.250944 ( -0.074502  0.074517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.45538e-08 ( -1.37838e-08  1.36741e-08 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.93446     ( -0.622443   0.833864 )
Norm@50keV  : 9.43182E-04    ( -0.000943477   0.000625229 )
------------------------------------------------------------
# Chi-Squared =          54.07 using 59 PHA bins.
# Reduced chi-squared =         0.9485 for     57 degrees of freedom 
# Null hypothesis probability =   5.858172e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.247537 ( -0.0760211  0.0765065 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50912e-08 ( -1.66907e-08  1.89442e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.57594E-05     ( 0.0413726   2.06171 )
Epeak [keV] : 20.2107      (   )
Norm@50keV  : 0.109660    (     )
------------------------------------------------------------
# Chi-Squared =          51.41 using 59 PHA bins.
# Reduced chi-squared =         0.9181 for     56 degrees of freedom 
# Null hypothesis probability =   6.488722e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.250687 ( -0.072761  0.073217 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50961e-08 ( -1.66921e-08  1.89399e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.947938   ( -2.63728   -2.63728 )
beta        : -9.99877    ( 2591.82   2601.82 )
Epeak [keV] : 21.8737      ( -18.0785 7.86352 )
Norm@50keV   : 0.544353    ( -0.49105   257.814 )
------------------------------------------------------------
# Chi-Squared =          51.38 using 59 PHA bins.
# Reduced chi-squared =         0.9342 for     55 degrees of freedom 
# Null hypothesis probability =   6.135936e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.250944 ( -0.074502  0.074517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.45538e-08 ( -1.37838e-08  1.36741e-08 ) 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: 2.94594     ( -0.637051   0.852537 )
Norm@50keV  : 9.32830E-04    ( -0.00093297   0.000627471 )
------------------------------------------------------------
# Chi-Squared =          53.69 using 59 PHA bins.
# Reduced chi-squared =         0.9418 for     57 degrees of freedom 
# Null hypothesis probability =   6.002040e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.246804 ( -0.0773852  0.0778524 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.48172e-08 ( -1.6782e-08  1.89953e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.54916E-03     ( 0.0346847   2.02463 )
Epeak [keV] : 20.2067      ( -20.4413 9.99286 )
Norm@50keV  : 0.107582    ( -0.129783   281.273 )
------------------------------------------------------------
# Chi-Squared =          51.14 using 59 PHA bins.
# Reduced chi-squared =         0.9132 for     56 degrees of freedom 
# Null hypothesis probability =   6.589356e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.248849 ( -0.074299  0.074719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08158e-08 ( -1.32638e-08  1.49447e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 7.83908E-03   ( 1.35997   1.35997 )
beta        : -9.37167    ( 5.67065   3.08428 )
Epeak [keV] : 20.0301      ( -11.8591 53.2207 )
Norm@50keV   : 0.113419    ( -0.0799173   146606 )
------------------------------------------------------------
# Chi-Squared =          51.14 using 59 PHA bins.
# Reduced chi-squared =         0.9298 for     55 degrees of freedom 
# Null hypothesis probability =   6.228246e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.250944 ( -0.074502  0.074517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.45538e-08 ( -1.37838e-08  1.36741e-08 ) ergs/cm2

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

S(25-50 keV)  = 1.49916e-08
S(50-100 keV) = 7.78007e-09

T90 vs. Hardness ratio plot

T90                                   = 4.09600001573563 sec.
Hardness ratio (energy fluence ratio) = 0.518962

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.499558
Count Ratio (50-100 keV) / (15-25 keV) = -0.0671975

Mask shadow pattern

IMX = 0, IMY = 0

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-60.128000 -16.128000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4620 -40.6823    8.1  43.8    9.3   0.1981   1.4    8.2	Vela X-1                      
170.7055 -60.5975   33.1  17.6   37.6   0.0268   0.3   11.6	Cen X-3                       
186.6662 -62.7636    0.3  13.3   62.8   2.7783  37.9    0.5	GX 301-2                      
256.2092 -37.8528    7.0  46.0  154.2   0.3434   1.6   10.6	4U 1700-377                   
256.5897 -36.3370    5.1  47.6  153.9   0.5186   2.3    9.1	GX 349+2                      
264.4786 -44.5099  510.8  41.7  165.8   0.0029   0.0   11.9	4U 1735-44                    
215.8803 -36.8302    2.1  39.8  107.5   1.5450   5.5 ------	UNKNOWN                       
301.4174 -35.3265    3.5  59.4 -163.1   1.6257   3.3 ------	UNKNOWN

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

Time interval of the image:
0.000000 4.096000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5754 -40.4632    5.7  44.0    9.6   0.0859   2.0    5.9	Vela X-1                      
170.3038 -60.5239    6.3  17.7   37.1   0.0451   1.8    6.0	Cen X-3                       
186.7193 -62.7417    1.6  13.3   62.9   0.1578   7.3    2.4	GX 301-2                      
256.0821 -37.9306    9.5  45.9  154.1  -0.0769  -1.2    6.9	4U 1700-377                   
256.5962 -36.4661    6.1  47.4  154.0  -0.1372  -1.9    8.2	GX 349+2                      
264.5016 -44.4893    5.3  41.7  165.8   0.0835   2.2   10.6	4U 1735-44

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Tue Feb 16 19:10:56 EST 2010