batgrbproduct analysis for trigger=381434

batgrbproduct Analysis for Trigger=381434

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 29 09:35:45 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger381434/GCN5_download_cron
======================================================================

  Trigger: 00381434      Segment: 000

  BAT Trigger Time: 283745229.416   [s; MET]
      Trigger Stop: 283745229.48   [s; MET]
               UTC: 2009-12-29T02:07:04.026500    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 74.8157170298384   Dec: -55.0421834227911  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.56
     Image Trigger?:     NO
     Rate S/N Ratio:     8.12403840463596  [ if not an image trigger ]
     Image S/N Ratio:    6.56

  Flight Position:   [ source = BAT ]
    RA: 74.8157170298384   Dec: -55.0421834227911  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 74.7542399661944   Dec: -54.9952534603265  [deg; J2000]  
        { 04h 59m 01.0s , -54d 59' 42.9" }
         +/- 3.2819975369978 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.75046780853913 [arcmin] (formal 1-sigma fit error)
    SNR: 5.5690103074071
 
  Angular difference between Flight and Ground position is 3.521471 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     T50: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.0640000104904175 second)
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.003176   0.001632   0.005482   0.004656
           0.001265   0.001441   0.001369   0.001366 [error]
 Peak      0.003176   0.001632   0.005482   0.004656
           0.001265   0.001441   0.001369   0.001366 [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 4.60e-10 1.01e-09 1.74e-09 6.95e-09 4.76e-09 1.01e-08   erg/cm2
              Error 4.68e-10 7.82e-10 1.39e-09 1.72e-08 3.76e-09 1.70e-08   erg/cm2
Peak flux Power-law 2.38e-01 2.79e-01 2.37e-01 3.41e-01 8.76e-01 1.09e+00   ph/cm2/s
              Error 2.40e-01 2.18e-01 1.87e-01 6.76e-01 4.41e-01 6.43e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.59e-10 1.01e-09 1.74e-09 6.89e-09 4.76e-09 1.01e-08   erg/cm2
              Error 4.69e-10 7.83e-10 1.39e-09 1.71e-08 3.76e-09 1.70e-08   erg/cm2
Peak flux Cutoff-PL 2.37e-01 2.79e-01 2.37e-01 3.38e-01 8.75e-01 1.09e+00   ph/cm2/s
              Error 2.40e-01 2.18e-01 1.87e-01 6.72e-01 4.40e-01 6.40e-01   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    1.214    1.354    -      -           7.35e-03 3.59e-03   64.900 57
CPL   2.470    0.000     155.0    0.0      1.88e-03 0.00e+00   64.660 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.238    1.319    -      -           7.42e-03 3.75e-03   65.460 57
CPL   2.486    0.000     159.9    0.0      1.91e-03 0.00e+00   65.200 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    0.064    0.000    0.064
T90     0.064    0.000    0.064
T50     0.064    0.000    0.064
Peak    0.064    0.000    0.064

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
   74.7542 -54.9953 0.0344   12.5 -133.9       0.0145     5.6  TRIG_00381434       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.064 (delta_t =   0.064 [sec])
Background time interval of the image:
-60.416  -5.416 (delta_t =  55.000 [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 0.064000

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 0.064000

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 0.064000

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    0.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21421     ( -1.51262   1.19628 )
Norm@50keV  : 7.35405E-03    ( -0.00359414   0.00359353 )
------------------------------------------------------------
# Chi-Squared =          64.90 using 59 PHA bins.
# Reduced chi-squared =          1.139 for     57 degrees of freedom 
# Null hypothesis probability =   2.205216e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.864797 ( -0.864812  0.439901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.75804e-09 ( -4.75804e-09  2.75414e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.46956     (     )
Epeak [keV] : 154.955      (   )
Norm@50keV  : 1.88304E-03    (     )
------------------------------------------------------------
# Chi-Squared =          64.66 using 59 PHA bins.
# Reduced chi-squared =          1.155 for     56 degrees of freedom 
# Null hypothesis probability =   2.000546e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.864339 ( -0.864339  0.439801 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7571e-09 ( -4.7571e-09  2.75618e-09 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    0.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.986906   ( 0.987095   0.987095 )
beta        : -1.21307    ( 1.2128   1.51208 )
Epeak [keV] : 47.2155      ( -46.7293 -46.7293 )
Norm@50keV   : 1.31120E-02    ( -0.0131235   12432.8 )
------------------------------------------------------------
# Chi-Squared =          64.90 using 59 PHA bins.
# Reduced chi-squared =          1.180 for     55 degrees of freedom 
# Null hypothesis probability =   1.696149e-01
 
Photon flux (15-150 keV)    in 0.064 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    0.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23848     ( -1.4554   1.18229 )
Norm@50keV  : 7.41772E-03    ( -0.00391826   0.00358653 )
------------------------------------------------------------
# Chi-Squared =          65.46 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.065871e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.875520 ( -0.442543  0.438581 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.76751e-09 ( -4.76745e-09  2.7516e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.48614     (     )
Epeak [keV] : 159.912      (   )
Norm@50keV  : 1.90828E-03    (     )
------------------------------------------------------------
# Chi-Squared =          65.20 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     56 degrees of freedom 
# Null hypothesis probability =   1.873416e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.875078 ( -0.44246  0.438452 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.76637e-09 ( -4.76637e-09  2.75363e-09 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    0.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01283   ( 1.01293   1.01293 )
beta        : -1.23683    ( 1.23717   1.45486 )
Epeak [keV] : 40.8275      ( -40.8525 -40.8525 )
Norm@50keV   : 1.35385E-02    ( -0.0135419   0.477236 )
------------------------------------------------------------
# Chi-Squared =          65.46 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     55 degrees of freedom 
# Null hypothesis probability =   1.578571e-01
 
Photon flux (15-150 keV)    in 0.064 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: 1.21421     ( -1.51262   1.19628 )
Norm@50keV  : 7.35405E-03    ( -0.00359414   0.00359353 )
------------------------------------------------------------
# Chi-Squared =          64.90 using 59 PHA bins.
# Reduced chi-squared =          1.139 for     57 degrees of freedom 
# Null hypothesis probability =   2.205216e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.864797 ( -0.864812  0.439901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.75804e-09 ( -4.75804e-09  2.75414e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.46956     (     )
Epeak [keV] : 154.955      (   )
Norm@50keV  : 1.88304E-03    (     )
------------------------------------------------------------
# Chi-Squared =          64.66 using 59 PHA bins.
# Reduced chi-squared =          1.155 for     56 degrees of freedom 
# Null hypothesis probability =   2.000546e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.864339 ( -0.864339  0.439801 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7571e-09 ( -4.7571e-09  2.75618e-09 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.986906   ( 0.987095   0.987095 )
beta        : -1.21307    ( 1.2128   1.51208 )
Epeak [keV] : 47.2155      ( -46.7293 -46.7293 )
Norm@50keV   : 1.31120E-02    ( -0.0131235   12432.8 )
------------------------------------------------------------
# Chi-Squared =          64.90 using 59 PHA bins.
# Reduced chi-squared =          1.180 for     55 degrees of freedom 
# Null hypothesis probability =   1.696149e-01
 
Photon flux (15-150 keV)    in 0.064 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)  = 1.00702e-09
S(50-100 keV) = 1.73793e-09

T90 vs. Hardness ratio plot

T90                                   = 0.0640000104904175 sec.
Hardness ratio (energy fluence ratio) = 1.72581

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.513854
Count Ratio (50-100 keV) / (15-25 keV) = 1.72607

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 0.064000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

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:
-60.416000 -5.416000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5143 -40.6664    3.8  49.3  177.7   0.5456   3.0    6.7	Vela X-1                      
160.8036 -52.5541    3.1  58.7 -159.2   1.7179   3.8 ------	UNKNOWN                       
163.4017 -54.6262    2.1  58.9 -156.2   2.7037   5.5 ------	UNKNOWN

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

Time interval of the image:
0.000000 0.064000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.7168 -40.5940   13.9  49.4  177.7  -0.0051  -0.8    8.9	Vela X-1                      
 74.7535 -54.9963    2.1  12.5 -133.9   0.0145   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
43.784600 302.686400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4945 -40.4480   12.9  41.8  164.3   0.3155   0.9    6.6	Vela X-1                      
170.3351 -60.5559   14.2  46.7 -153.7  -0.3538  -0.8    4.1	Cen X-3                       
186.6283 -62.7582    3.9  50.9 -144.6   2.0705   3.0    1.1	GX 301-2                      
 36.4312 -30.5215    2.8  36.6    4.7   1.0827   4.1 ------	UNKNOWN                       
 57.3180 -59.3434    3.3  10.4  -53.1   0.6029   3.5 ------	UNKNOWN                       
165.5873 -41.8585    4.0  57.3 -173.7   2.4114   2.9 ------	UNKNOWN                       
 24.6075 -38.2748    2.0  37.3  -16.1   1.4177   5.7 ------	UNKNOWN                       
  9.7438 -40.6159    2.8  44.2  -30.6   1.4479   4.2 ------	UNKNOWN                       
181.7494 -50.9414    4.1  57.9 -156.8   3.4391   2.9 ------	UNKNOWN                       
325.2212 -76.8572    3.0  41.0  -92.4   3.4485   3.8 ------	UNKNOWN

Plot creation:
Mon Feb 15 14:53:37 EST 2010