batgrbproduct analysis for trigger=373679

batgrbproduct Analysis for Trigger=373679

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): Sat Oct 24 17:49:10 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger373679/GCN5_download_cron
======================================================================

  Trigger: 00373679      Segment: 000

  BAT Trigger Time: 278076344   [s; MET]
      Trigger Stop: 278076408   [s; MET]
               UTC: 2009-10-24T11:25:38.801040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 300.630369870914   Dec: 34.8540083617864  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.11
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.11

  Flight Position:   [ source = BAT ]
    RA: 300.630369870914   Dec: 34.8540083617864  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 300.62204285163   Dec: 34.8524745639275  [deg; J2000]  
        { 20h 02m 29.3s , +34d 51' 08.9" }
         +/- 1.66720430369253 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.629235671437416 [arcmin] (formal 1-sigma fit error)
    SNR: 14.6551912522404
 
  Angular difference between Flight and Ground position is 0.420200 arcmin
 
  Partial Coding Fraction: 0.59375    [ 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     0.454323   0.666454   0.390380   0.104431
           0.051226   0.053745   0.049192   0.045695 [error]
 Peak      0.454323   0.666454   0.390380   0.104431
           0.051226   0.053745   0.049192   0.045695 [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 1.63e-07 2.68e-07 3.34e-07 8.28e-07 9.98e-07 1.59e-06   erg/cm2
              Error 2.37e-08 2.60e-08 4.75e-08 2.38e-07 1.13e-07 2.84e-07   erg/cm2
Peak flux Power-law 8.19e-02 7.44e-02 4.67e-02 4.48e-02 2.22e-01 2.48e-01   ph/cm2/s
              Error 1.15e-02 7.04e-03 6.34e-03 1.17e-02 2.09e-02 2.40e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.46e-07 3.05e-07 3.25e-07 1.68e-07 9.45e-07 0.00e+00   erg/cm2
              Error 2.71e-08 3.76e-08 5.93e-08 2.49e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 7.34e-02 8.45e-02 4.65e-02 1.22e-02 2.14e-01 2.17e-01   ph/cm2/s
              Error 1.31e-02 1.01e-02 7.74e-03 1.21e-02 2.15e-02 2.41e-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    1.682    0.165    -      -           1.68e-03 1.80e-04   56.730 57
CPL   0.584    0.886      55.7   22.7      6.98e-03 1.27e-02   50.560 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.672    0.159    -      -           1.69e-03 1.78e-04   57.980 57
CPL   0.585    0.852      55.7   21.8      7.01e-03 1.23e-02   51.460 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
  300.6220 +34.8525 0.0131   34.0 -142.7       1.6330    14.7  TRIG_00373679       
------------------------------------------
 
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)

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: 1.68177     ( -0.163158   0.167072 )
Norm@50keV  : 1.68232E-03    ( -0.000180677   0.000178644 )
------------------------------------------------------------
# Chi-Squared =          56.73 using 59 PHA bins.
# Reduced chi-squared =         0.9953 for     57 degrees of freedom 
# Null hypothesis probability =   4.849937e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.222027 ( -0.0215619  0.0215713 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.98394e-07 ( -1.1242e-07  1.14172e-07 ) 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: 0.583963     ( -0.98965   0.782405 )
Epeak [keV] : 55.7265      ( -10.5253 34.9264 )
Norm@50keV  : 6.98161E-03    ( -0.00699346   0.0184609 )
------------------------------------------------------------
# Chi-Squared =          50.56 using 59 PHA bins.
# Reduced chi-squared =         0.9028 for     56 degrees of freedom 
# Null hypothesis probability =   6.802311e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.213024 ( -0.022438  0.022459 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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       : 2.27474   ( -3.15292   -2.14486 )
beta        : -2.04517    ( 2.04517   0.318623 )
Epeak [keV] : 32.9834      ( -9.00799 31.8354 )
Norm@50keV   : 0.766720    ( -0.768333   34.1735 )
------------------------------------------------------------
# Chi-Squared =          48.36 using 59 PHA bins.
# Reduced chi-squared =         0.8792 for     55 degrees of freedom 
# Null hypothesis probability =   7.246097e-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: 1.67214     ( -0.157152   0.161425 )
Norm@50keV  : 1.68642E-03    ( -0.000178645   0.000176483 )
------------------------------------------------------------
# Chi-Squared =          57.98 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     57 degrees of freedom 
# Null hypothesis probability =   4.389169e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.221839 ( -0.0208592  0.0208618 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.00168e-06 ( -1.11698e-07  1.13518e-07 ) 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: 0.584826     ( -0.948847   0.75538 )
Epeak [keV] : 55.6527      ( -10.4261 33.2108 )
Norm@50keV  : 7.01118E-03    ( -0.00703335   0.0175934 )
------------------------------------------------------------
# Chi-Squared =          51.46 using 59 PHA bins.
# Reduced chi-squared =         0.9189 for     56 degrees of freedom 
# Null hypothesis probability =   6.471919e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.213786 ( -0.02152  0.021554 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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       : 2.04740   ( -3.02086   -2.02284 )
beta        : -2.04290    ( -0.437715   0.315463 )
Epeak [keV] : 33.2408      ( -9.49096 31.4617 )
Norm@50keV   : 0.540671    ( -0.53695   37.146 )
------------------------------------------------------------
# Chi-Squared =          49.27 using 59 PHA bins.
# Reduced chi-squared =         0.8958 for     55 degrees of freedom 
# Null hypothesis probability =   6.922504e-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: 1.68177     ( -0.163158   0.167072 )
Norm@50keV  : 1.68232E-03    ( -0.000180677   0.000178644 )
------------------------------------------------------------
# Chi-Squared =          56.73 using 59 PHA bins.
# Reduced chi-squared =         0.9953 for     57 degrees of freedom 
# Null hypothesis probability =   4.849937e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.222027 ( -0.0215619  0.0215713 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.98394e-07 ( -1.1242e-07  1.14172e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.583963     ( -0.98965   0.782405 )
Epeak [keV] : 55.7265      ( -10.5253 34.9264 )
Norm@50keV  : 6.98161E-03    ( -0.00699346   0.0184609 )
------------------------------------------------------------
# Chi-Squared =          50.56 using 59 PHA bins.
# Reduced chi-squared =         0.9028 for     56 degrees of freedom 
# Null hypothesis probability =   6.802311e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.213024 ( -0.022438  0.022459 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.27474   ( -3.15292   -2.14486 )
beta        : -2.04517    ( 2.04517   0.318623 )
Epeak [keV] : 32.9834      ( -9.00799 31.8354 )
Norm@50keV   : 0.766720    ( -0.768333   34.1735 )
------------------------------------------------------------
# Chi-Squared =          48.36 using 59 PHA bins.
# Reduced chi-squared =         0.8792 for     55 degrees of freedom 
# Null hypothesis probability =   7.246097e-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)  = 2.68225e-07
S(50-100 keV) = 3.34421e-07

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 1.24679

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.46692
Count Ratio (50-100 keV) / (15-25 keV) = 0.859257

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 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]                   [']
299.6076  35.3414    5.1  34.1 -141.0  -0.2557  -2.3    8.4	Cyg X-1                       
307.9271  41.0176    4.7  25.6 -143.8   0.2211   2.4    9.2	Cyg X-3                       
326.3290  38.4333    4.2  20.3 -178.8  -0.2224  -2.8   10.0	Cyg X-2                       
111.3050  74.5221    2.0  44.8  -12.7   0.7548   5.8 ------	UNKNOWN                       
309.3748  40.3617    2.2  25.4 -146.8   0.4476   5.2 ------	UNKNOWN                       
300.6220  34.8525    0.8  34.0 -142.7   1.6332  14.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
128.400590 303.088900
541.000000 603.023100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3150  35.2542   10.8  37.6  -66.5   0.5249   1.1    8.8	Her X-1                       
288.8697  11.0620    0.9  26.1 -143.8   2.6274  12.7    8.2	GRS 1915+105                  
299.5193  35.0395   15.5   0.9  -69.3   0.1448   0.7   10.3	Cyg X-1                       
307.9183  40.8961    5.8   8.3   50.6  -0.3646  -2.0    9.3	Cyg X-3                       
326.3474  38.4464    8.9  20.9   81.7   0.3052   1.3   11.1	Cyg X-2                       
319.6740  42.6319    2.3  16.7   65.7   1.0222   5.0 ------	UNKNOWN                       
310.4817  34.1341    2.5   8.2  101.4   0.8300   4.6 ------	UNKNOWN                       
300.6687  34.9073    0.3   0.1   45.6   6.4430  33.9 ------	UNKNOWN                       
262.9710  10.3163    3.0  42.1 -107.3   3.7976   3.8 ------	UNKNOWN                       
261.5122  12.8067    2.1  41.6 -103.0   5.3595   5.6 ------	UNKNOWN

Plot creation:
Mon Feb 15 16:39:13 EST 2010