batgrbproduct analysis for trigger=361958

batgrbproduct Analysis for Trigger=361958

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 Sep  5 21:35:15 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger361958/GCN5_download_cron
======================================================================

  Trigger: 00361958      Segment: 000

  BAT Trigger Time: 273842120   [s; MET]
      Trigger Stop: 273842440   [s; MET]
               UTC: 2009-09-05T11:15:14.940980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 274.672193005355   Dec: -17.0720674645165  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.63
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.63

  Flight Position:   [ source = BAT ]
    RA: 274.672193005355   Dec: -17.0720674645165  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 274.696925964005   Dec: -17.0634653310765  [deg; J2000]  
        { 18h 18m 47.3s , -17d 03' 48.5" }
         +/- 3.60560852329742 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.88052882085616 [arcmin] (formal 1-sigma fit error)
    SNR: 4.86894317697727
 
  Angular difference between Flight and Ground position is 1.509593 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.933898   0.504248   0.115533  -0.011919
           0.117324   0.105337   0.089223   0.078866 [error]
 Peak      0.933898   0.504248   0.115533  -0.011919
           0.117324   0.105337   0.089223   0.078866 [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 2.75e-07 2.09e-07 1.06e-07 7.76e-08 6.27e-07 6.68e-07   erg/cm2
              Error 5.55e-08 5.42e-08 5.84e-08 7.98e-08 1.48e-07 1.89e-07   erg/cm2
Peak flux Power-law 2.87e-02 1.23e-02 3.13e-03 9.82e-04 4.47e-02 4.51e-02   ph/cm2/s
              Error 5.14e-03 2.99e-03 1.61e-03 1.07e-03 7.53e-03 7.71e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.73e-07 2.20e-07 8.45e-08 1.70e-08 5.92e-07 5.95e-07   erg/cm2
              Error 5.74e-08 6.35e-08 8.30e-08 4.84e-08 1.56e-07 2.02e-07   erg/cm2
Peak flux Cutoff-PL 2.87e-02 1.23e-02 3.13e-03 9.74e-04 4.47e-02 4.51e-02   ph/cm2/s
              Error 5.14e-03 2.99e-03 1.61e-03 1.06e-03 7.53e-03 7.70e-03   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    2.976    0.497    -      -           1.65e-04 6.76e-05   58.660 57
CPL   1.611    0.000       8.8    0.0      1.41e-03 0.00e+00   58.520 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.972    0.461    -      -           1.66e-04 6.64e-05   59.330 57
CPL   1.621    0.000       8.4    0.0      1.46e-03 0.00e+00   59.260 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  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

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
  274.6969 -17.0635 0.0393   12.7   60.5       1.4653     4.9  TRIG_00361958       
------------------------------------------
 
Foreground time interval of the image:
  0.000 320.000 (delta_t = 320.000 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

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  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97617     ( -0.44832   0.546534 )
Norm@50keV  : 1.64750E-04    ( -6.50377e-05   7.01697e-05 )
------------------------------------------------------------
# Chi-Squared =          58.66 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     57 degrees of freedom 
# Null hypothesis probability =   4.144659e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.45305E-02 ( -0.00798321  0.00799298 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26608e-07 ( -1.42001e-07  1.54363e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61077     (     )
Epeak [keV] : 8.80622      (   )
Norm@50keV  : 1.40829E-03    (     )
------------------------------------------------------------
# Chi-Squared =          58.52 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     56 degrees of freedom 
# Null hypothesis probability =   3.832275e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.45124E-02 ( -0.0079801  0.0079899 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.91581e-07 ( -1.37677e-07  1.73802e-07 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -3.79557   ( 0.822496   3.18045 )
beta        : -2.97607    ( -0.546334   0.447876 )
Epeak [keV] : 41.6389      ( -41.6389 -41.6389 )
Norm@50keV   : 2.23935E-02    ( -0.00883337   0.00953611 )
------------------------------------------------------------
# Chi-Squared =          58.66 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     55 degrees of freedom 
# Null hypothesis probability =   3.429108e-01
 
Photon flux (15-150 keV)    in 320 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  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97206     ( -0.41492   0.507618 )
Norm@50keV  : 1.65886E-04    ( -6.37421e-05   6.91077e-05 )
------------------------------------------------------------
# Chi-Squared =          59.33 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     57 degrees of freedom 
# Null hypothesis probability =   3.905108e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.47051E-02 ( -0.00752131  0.00754442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.2977e-07 ( -1.40595e-07  1.53455e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62051     (     )
Epeak [keV] : 8.35881      (   )
Norm@50keV  : 1.46322E-03    (     )
------------------------------------------------------------
# Chi-Squared =          59.26 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.574170e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.46883E-02 ( -0.007519  0.0075419 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.29744e-07 ( -1.40579e-07  1.53424e-07 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.96680   ( 0.822496   2.9668 )
beta        : -2.97196    ( -0.507453   0.414436 )
Epeak [keV] : 40.4324      ( -40.4324 -40.4324 )
Norm@50keV   : 2.25483E-02    ( -0.0086603   0.0093927 )
------------------------------------------------------------
# Chi-Squared =          59.33 using 59 PHA bins.
# Reduced chi-squared =          1.079 for     55 degrees of freedom 
# Null hypothesis probability =   3.205776e-01
 
Photon flux (15-150 keV)    in 320 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: 2.97617     ( -0.44832   0.546534 )
Norm@50keV  : 1.64750E-04    ( -6.50377e-05   7.01697e-05 )
------------------------------------------------------------
# Chi-Squared =          58.66 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     57 degrees of freedom 
# Null hypothesis probability =   4.144659e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.45305E-02 ( -0.00798321  0.00799298 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26608e-07 ( -1.42001e-07  1.54363e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61077     (     )
Epeak [keV] : 8.80622      (   )
Norm@50keV  : 1.40829E-03    (     )
------------------------------------------------------------
# Chi-Squared =          58.52 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     56 degrees of freedom 
# Null hypothesis probability =   3.832275e-01
 
Photon flux (15-150 keV)    in 320 sec: 4.45124E-02 ( -0.0079801  0.0079899 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.91581e-07 ( -1.37677e-07  1.73802e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -3.79557   ( 0.822496   3.18045 )
beta        : -2.97607    ( -0.546334   0.447876 )
Epeak [keV] : 41.6389      ( -41.6389 -41.6389 )
Norm@50keV   : 2.23935E-02    ( -0.00883337   0.00953611 )
------------------------------------------------------------
# Chi-Squared =          58.66 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     55 degrees of freedom 
# Null hypothesis probability =   3.429108e-01
 
Photon flux (15-150 keV)    in 320 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)  = 2.09216e-07
S(50-100 keV) = 1.06356e-07

T90 vs. Hardness ratio plot

T90                                   = 320 sec.
Hardness ratio (energy fluence ratio) = 0.508355

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.539939
Count Ratio (50-100 keV) / (15-25 keV) = 0.123711

Mask shadow pattern

IMX = 0, IMY = 0

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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 320.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9765 -15.6389    0.2  20.3  -57.4  14.3098  49.7    0.2	Sco X-1                       
255.9940 -37.8030    1.7  14.4 -144.8   1.8972   6.9    2.5	4U 1700-377                   
256.2505 -36.4155    3.1  13.1 -142.4   1.0833   3.7    8.9	GX 349+2                      
262.9324 -24.6827    2.9   1.2  -56.9   1.2012   4.0    5.6	GX 1+4                        
264.6986 -44.6060    3.4  19.4 -172.9   0.9649   3.4    9.5	4U 1735-44                    
268.4366  -1.4975    2.8  24.1   18.7   1.3532   4.1    4.9	SW J1753.5-0127               
270.2390 -25.1100    1.9   5.5   98.5   1.7291   6.3    3.1	GX 5-1                        
270.2401 -25.6018    2.3   5.5  103.6   1.3535   5.0    9.1	GRS 1758-258                  
273.9417 -13.9687    2.6  14.5   49.3   1.3091   4.5    5.5	GX 17+2                       
276.0447 -30.2811    5.6  11.7  126.7   0.5692   2.1    8.1	H1820-303                     
284.9703 -24.9029    3.8  18.8  101.7   1.0435   3.0    3.7	HT1900.1-2455                 
288.8660  10.8622    3.7  43.4   44.9   2.3485   3.1    6.4	GRS 1915+105                  
254.2188 -15.8220    2.3  13.2  -38.4   1.3693   5.0 ------	UNKNOWN                       
215.4943 -38.4098    3.4  42.9 -111.9   4.5875   3.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
377.100600 963.045100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9905 -15.6384    0.3  28.5  -91.9  25.7116  38.0    0.6	Sco X-1                       
254.5599  35.3677   11.8  55.8  -20.2   1.5968   1.0    5.2	Her X-1                       
255.8926 -37.9007    4.6  26.6 -145.8   1.2666   2.5    5.6	4U 1700-377                   
256.3612 -36.3245    4.1  25.2 -143.9   1.3855   2.8    6.9	GX 349+2                      
263.0188 -24.7061    2.3  13.3 -127.4   2.4196   5.1    2.4	GX 1+4                        
264.9219 -44.5347    7.4  28.7 -165.8   0.7009   1.6    9.2	4U 1735-44                    
268.3114  -1.4770    2.0  16.8  -22.9   2.5195   5.7    3.7	SW J1753.5-0127               
270.3172 -25.0413    1.5   8.9 -154.2   3.0130   7.7    2.9	GX 5-1                        
270.4124 -25.6886    2.3   9.5 -156.5   2.1037   5.2    6.8	GRS 1758-258                  
274.0679 -14.0437    2.4   3.1  -11.3   2.1798   4.9    3.6	GX 17+2                       
275.7557 -30.4039    5.1  13.4  175.6   0.9769   2.3    9.0	H1820-303                     
285.0748 -24.9473    4.7  12.5  130.4   1.0219   2.5    2.7	HT1900.1-2455                 
288.7736  10.9369    1.9  31.3   27.0   3.8990   6.2    1.5	GRS 1915+105                  
293.5804  23.1313    4.1  44.2   24.9   2.8653   2.8 ------	UNKNOWN                       
283.9406  24.3224    2.7  42.4   12.2   2.9523   4.2 ------	UNKNOWN                       
280.3443  37.9867    3.6  55.3    5.0   6.6656   3.2 ------	UNKNOWN                       
279.2431  33.8975    2.3  51.1    4.5   5.8703   4.9 ------	UNKNOWN                       
280.7966 -71.0468    3.1  54.1  177.2   6.8717   3.8 ------	UNKNOWN                       
238.0925  13.0113    3.2  47.0  -52.9   8.0803   3.6 ------	UNKNOWN

Plot creation:
Mon Feb 15 17:50:38 EST 2010