batgrbproduct analysis for trigger=345396

batgrbproduct Analysis for Trigger=345396

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 v2.42
    Process Start Time (local time): Fri Mar  6 14:18:38 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger345396/GCN5_download_cron
======================================================================

  Trigger: 00345396      Segment: 000

  BAT Trigger Time: 258040469   [s; MET]
      Trigger Stop: 258040469.064   [s; MET]
               UTC: 2009-03-06T13:54:24.447540    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 16.7400341494282   Dec: -50.0652286349102  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.58
     Image Trigger?:     NO
     Rate S/N Ratio:     8.71779788708135  [ if not an image trigger ]
     Image S/N Ratio:    5.58

  Flight Position:   [ source = BAT ]
    RA: 16.7400341494282   Dec: -50.0652286349102  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 16.793075456536   Dec: -50.1249509859768  [deg; J2000]  
        { 01h 07m 10.3s , -50d 07' 29.8" }
         +/- 4.25095065209629 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.60574051796624 [arcmin] (formal 1-sigma fit error)
    SNR: 3.84840833459454
 
  Angular difference between Flight and Ground position is 4.124136 arcmin
 
  Partial Coding Fraction: 0.703125    [ 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    -0.001498  -0.000140   0.006675   0.005205
           0.001553   0.001644   0.001623   0.001850 [error]
 Peak     -0.001498  -0.000140   0.006675   0.005205
           0.001553   0.001644   0.001623   0.001850 [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 7.76e-11 4.73e-10 2.52e-09 6.06e-08 8.21e-09 6.26e-08   erg/cm2
              Error 1.43e-10 5.33e-10 1.93e-09 7.86e-08 3.90e-09 7.96e-08   erg/cm2
Peak flux Power-law 3.72e-02 1.21e-01 3.22e-01 2.52e+00 8.80e-01 3.00e+00   ph/cm2/s
              Error 6.97e-02 1.40e-01 2.46e-01 2.97e+00 6.78e-01 2.47e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.43e-11 4.72e-10 3.38e-09 1.24e-08 8.72e-09 1.65e-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 Cutoff-PL 1.67e-02 1.18e-01 4.36e-01 7.16e-01 9.50e-01 1.31e+00   ph/cm2/s
              Error 3.97e-02 9.98e-02 2.24e-01 1.77e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 2.22e-11 4.45e-10 3.72e-09 7.62e-09 8.63e-09 1.29e-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 7.17e-03 9.63e-02 4.59e-01 5.79e-01 9.26e-01 1.07e+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   -0.413    1.203    -      -           5.48e-03 5.18e-03   48.540 57
CPL  -4.984    0.000     117.5   49.5      1.22e-01 1.24e-01   45.450 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.417    1.196    -      -           5.47e-03 5.17e-03   48.810 57
CPL  -4.497    0.000     126.8    0.0      7.81e-02 0.00e+00   45.880 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
   16.7931 -50.1250 0.0499   34.0   -5.9       0.0123     3.8  TRIG_00345396       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.064 (delta_t =   0.064 [sec])
Background time interval of the image:
-60.000  -5.000 (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: -0.413255     ( -1.51275   0.892983 )
Norm@50keV  : 5.47607E-03    ( -0.00547645   0.00489232 )
------------------------------------------------------------
# Chi-Squared =          48.54 using 59 PHA bins.
# Reduced chi-squared =         0.8516 for     57 degrees of freedom 
# Null hypothesis probability =   7.799014e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.879876 ( -0.879876  0.477278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.21101e-09 ( -3.9008e-09  3.89976e-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: -4.98368     (     )
Epeak [keV] : 117.495      ( -31.8803 67.1007 )
Norm@50keV  : 0.121539    ( -0.121539   0.126779 )
------------------------------------------------------------
# Chi-Squared =          45.45 using 59 PHA bins.
# Reduced chi-squared =         0.8116 for     56 degrees of freedom 
# Null hypothesis probability =   8.421642e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.949911 ( 0.422299  -0.949911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.72416e-09 ( 3.97638e-09  -8.72416e-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       : 4.38550   ( -5.47264   -0.614466 )
beta        : -9.37166    ( 7.13344   9.45324 )
Epeak [keV] : 121.805      ( -31.101 549.06 )
Norm@50keV   : 8.94573E-02    ( -0.0893594   0.0399509 )
------------------------------------------------------------
# Chi-Squared =          45.60 using 59 PHA bins.
# Reduced chi-squared =         0.8291 for     55 degrees of freedom 
# Null hypothesis probability =   8.128059e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.925788 ( -0.394575  0.402972 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.63014e-09 ( -3.6772e-09  3.82272e-09 ) 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: -0.416816     ( -1.50211   0.890732 )
Norm@50keV  : 5.46732E-03    ( -0.00546773   0.0048803 )
------------------------------------------------------------
# Chi-Squared =          48.81 using 59 PHA bins.
# Reduced chi-squared =         0.8563 for     57 degrees of freedom 
# Null hypothesis probability =   7.715080e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.879999 ( -0.879999  0.476332 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.21818e-09 ( -3.89695e-09  3.89581e-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: -4.49705     (     )
Epeak [keV] : 126.775      ( -9999.47 -9999.47 )
Norm@50keV  : 7.80759E-02    (     )
------------------------------------------------------------
# Chi-Squared =          45.88 using 59 PHA bins.
# Reduced chi-squared =         0.8192 for     56 degrees of freedom 
# Null hypothesis probability =   8.307726e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.949911 ( 0.422299  -0.949911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.72416e-09 ( 3.97638e-09  -8.72416e-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       : 4.38541   ( -2.31672   2.89587 )
beta        : -10.00000    ( 2.87422e+10   2.87422e+10 )
Epeak [keV] : 128.245      ( -40.2078 1222.13 )
Norm@50keV   : 7.06070E-02    ( -0.071076   0.115187 )
------------------------------------------------------------
# Chi-Squared =          45.89 using 59 PHA bins.
# Reduced chi-squared =         0.8344 for     55 degrees of freedom 
# Null hypothesis probability =   8.043588e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.925788 ( -0.394575  0.402972 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.63014e-09 ( -3.6772e-09  3.82272e-09 ) 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: -0.413255     ( -1.51275   0.892983 )
Norm@50keV  : 5.47607E-03    ( -0.00547645   0.00489232 )
------------------------------------------------------------
# Chi-Squared =          48.54 using 59 PHA bins.
# Reduced chi-squared =         0.8516 for     57 degrees of freedom 
# Null hypothesis probability =   7.799014e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.879876 ( -0.879876  0.477278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.21101e-09 ( -3.9008e-09  3.89976e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.98368     (     )
Epeak [keV] : 117.495      ( -31.8803 67.1007 )
Norm@50keV  : 0.121539    ( -0.121539   0.126779 )
------------------------------------------------------------
# Chi-Squared =          45.45 using 59 PHA bins.
# Reduced chi-squared =         0.8116 for     56 degrees of freedom 
# Null hypothesis probability =   8.421642e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.949911 ( 0.422299  -0.949911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.72416e-09 ( 3.97638e-09  -8.72416e-09 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38550   ( -5.47221   -0.614466 )
beta        : -9.37166    ( 7.13344   9.45324 )
Epeak [keV] : 121.805      ( -31.101 639.586 )
Norm@50keV   : 8.94573E-02    ( -0.0893594   0.0399509 )
------------------------------------------------------------
# Chi-Squared =          45.60 using 59 PHA bins.
# Reduced chi-squared =         0.8291 for     55 degrees of freedom 
# Null hypothesis probability =   8.128059e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 0.925788 ( -0.394575  0.402972 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.63014e-09 ( -3.6772e-09  3.82272e-09 ) ergs/cm2

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

S(25-50 keV)  = 4.7256e-10
S(50-100 keV) = 2.51658e-09

T90 vs. Hardness ratio plot

T90                                   = 0.0640000104904175 sec.
Hardness ratio (energy fluence ratio) = 5.32542

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.0934579
Count Ratio (50-100 keV) / (15-25 keV) = -4.45594

Mask shadow pattern

IMX = 6.698492778619112E-01, IMY = 6.959880629369714E-02

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:
-60.000000 -5.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
255.9031 -38.0132    3.8  46.2  147.5   0.6844   3.1   10.9	4U 1700-377                   
256.5754 -36.3852   14.0  46.9  149.6  -0.1904  -0.8    7.1	GX 349+2                      
262.8947 -24.7442    4.3  51.4  165.6  -0.6884  -2.7    6.2	GX 1+4                        
264.5841 -44.5227   30.4  37.1  145.7   0.0462   0.4    8.1	4U 1735-44                    
270.3636 -25.0159    7.8  46.8  172.2  -0.2202  -1.5    5.7	GX 5-1                        
270.4181 -25.7156    8.1  46.3  171.6   0.2024   1.4    6.5	GRS 1758-258                  
273.9756 -14.1406    7.7  53.6 -175.9  -0.3109  -1.5    6.5	GX 17+2                       
275.7235 -30.3088    0.0  39.7  172.4   0.1071   1.0   11.0	H1820-303                     
285.2393 -24.9571    5.3  38.7 -171.9   0.2039   2.2   11.3	HT1900.1-2455                 
 29.7070 -66.1901    2.3  35.1   24.9   0.5009   5.0 ------	UNKNOWN                       
 13.8206 -20.2259    2.6  51.9  -42.2   1.5642   4.4 ------	UNKNOWN                       
357.5553 -18.6206    2.9  44.5  -60.5   1.0865   4.0 ------	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]                   [']
256.1173 -37.7059    5.7  46.3  147.9  -0.0148  -2.0   10.4	4U 1700-377                   
256.4240 -36.4255   21.9  47.0  149.5   0.0039   0.5    0.6	GX 349+2                      
263.0522 -24.5650   52.2  51.5  165.8   0.0018   0.2   11.1	GX 1+4                        
264.8111 -44.4211    9.9  37.0  145.9  -0.0052  -1.2    3.4	4U 1735-44                    
270.3532 -25.1894    6.4  46.7  172.0  -0.0092  -1.8    7.6	GX 5-1                        
270.1702 -25.7418    2.8  46.4  171.3   0.0208   4.2    7.1	GRS 1758-258                  
273.9280 -13.9746    4.7  53.8 -175.8  -0.0166  -2.5    5.9	GX 17+2                       
275.8700 -30.5058  306.2  39.5  172.3   0.0001   0.0    8.8	H1820-303                     
285.0955 -24.9295    3.2  38.8 -172.0  -0.0124  -3.6    3.3	HT1900.1-2455

Post-slew image of 15-350 keV band

Time interval of the image:
68.200590 238.780000
240.000000 243.044300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
272.8705 -67.7608    2.5  49.4  158.3   1.8525   4.6 ------	UNKNOWN                       
 22.5729 -28.8891    2.0  21.6  -36.7   0.7301   5.7 ------	UNKNOWN                       
294.7787 -38.8510    3.1  56.6 -163.2   2.0048   3.7 ------	UNKNOWN                       
341.7837 -28.8807    3.0  33.8 -115.1   0.8195   3.8 ------	UNKNOWN                       
 23.3992   1.6073    3.4  52.0  -42.2   2.4157   3.4 ------	UNKNOWN                       
336.8288 -20.4517    2.9  43.2 -112.2   2.3385   4.0 ------	UNKNOWN

Plot creation:
Tue Feb 16 21:53:44 EST 2010