batgrbproduct analysis for trigger=296491

batgrbproduct Analysis for Trigger=296491

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 v2.41
    Process Start Time (local time): Fri Dec 14 22:57:11 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger296491/GCN5_download_cron
======================================================================

  Trigger: 00296491      Segment: 000

  BAT Trigger Time: 216571901.632   [s; MET]
      Trigger Stop: 216571902.656   [s; MET]
               UTC: 2007-11-12T14:51:39.275140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 297.441990896559   Dec: -50.3379015898847  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.7
     Image Trigger?:     NO
     Rate S/N Ratio:     14.0356688476182  [ if not an image trigger ]
     Image S/N Ratio:    6.7

  Flight Position:   [ source = BAT ]
    RA: 297.441990896559   Dec: -50.3379015898847  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 297.445785124918   Dec: -50.3464283933739  [deg; J2000]  
        { 19h 49m 47.0s , -50d 20' 47.1" }
         +/- 3.7095342099465 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.44198416250723 [arcmin] (formal 1-sigma fit error)
    SNR: 4.67525151011665
 
  Angular difference between Flight and Ground position is 0.531838 arcmin
 
  Partial Coding Fraction: 0.3945312    [ including projection effects ]

  Duration
     T90: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     T50: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02399998903275 second)
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.041362   0.031242  -0.004631   0.005836
           0.010002   0.009495   0.008458   0.008916 [error]
 Peak      0.041362   0.031242  -0.004631   0.005836
           0.010002   0.009495   0.008458   0.008916 [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 1.73e-08 1.15e-08 5.01e-09 3.00e-09 3.53e-08 3.68e-08   erg/cm2
              Error 6.06e-09 5.53e-09 5.50e-09 6.14e-09 1.43e-08 1.70e-08   erg/cm2
Peak flux Power-law 5.65e-01 2.14e-01 4.68e-02 1.23e-02 8.33e-01 8.38e-01   ph/cm2/s
              Error 1.93e-01 9.68e-02 4.33e-02 2.26e-02 2.65e-01 2.68e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.67e-08 1.40e-08 3.04e-09 1.07e-10 3.39e-08 0.00e+00   erg/cm2
              Error 6.91e-09 1.09e-08 4.80e-09 1.02e-08 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 5.42e-01 2.60e-01 3.04e-02 5.89e-04 8.33e-01 8.34e-01   ph/cm2/s
              Error 2.19e-01 1.31e-01 2.99e-02 1.73e-02 2.59e-01 2.59e-01   ph/cm2/s
 
Fluence        Band 1.64e-08 1.39e-08 2.94e-09 1.01e-10 3.36e-08 3.50e-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 4.89e-01 2.74e-01 1.33e-02 5.09e-05 7.76e-01 7.76e-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    3.201    0.913    -      -           2.60e-03 2.34e-03   63.080 57
CPL   1.083    3.012      14.0    0.0      6.86e-02 0.00e+00   62.000 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.189    0.885    -      -           2.63e-03 2.35e-03   63.730 57
CPL   1.091    3.040      13.9    0.0      6.88e-02 0.00e+00   62.610 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    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

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
  297.4458 -50.3464 0.0412   47.1 -168.9       0.0896     4.7  TRIG_00296491       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-30.731  -5.632 (delta_t =  25.099 [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 1.024000

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 1.024000

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 1.024000

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    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.20077     ( -0.738926   1.08616 )
Norm@50keV  : 2.59888E-03    ( -0.00259792   0.0020862 )
------------------------------------------------------------
# Chi-Squared =          63.08 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.700957e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.830797 ( -0.270891  0.271673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53179e-08 ( -1.34923e-08  1.51305e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08296     ( -5.08578   0.93727 )
Epeak [keV] : 13.9905      (   )
Norm@50keV  : 6.86396E-02    (     )
------------------------------------------------------------
# Chi-Squared =          62.00 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     56 degrees of freedom 
# Null hypothesis probability =   2.708258e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.824727 ( -0.266519  0.267093 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.939897   ( -5.65207   1.62252 )
beta        : -9.37167    ( 10   20 )
Epeak [keV] : 14.5213      ( -7.24642 24.3593 )
Norm@50keV   : 9.03547E-02    ( -0.0920225   334.187 )
------------------------------------------------------------
# Chi-Squared =          62.03 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     55 degrees of freedom 
# Null hypothesis probability =   2.399506e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.776377 ( -0.250865  0.250983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.1588e-08  1.06692e-08 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.18936     ( -0.717609   1.05305 )
Norm@50keV  : 2.62938E-03    ( -0.00262807   0.00207591 )
------------------------------------------------------------
# Chi-Squared =          63.73 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     57 degrees of freedom 
# Null hypothesis probability =   2.518774e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.833337 ( -0.26422  0.26516 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.55197e-08 ( -1.33831e-08  1.50657e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09140     ( -5.19988   0.880037 )
Epeak [keV] : 13.8684      (   )
Norm@50keV  : 6.88170E-02    (     )
------------------------------------------------------------
# Chi-Squared =          62.61 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     56 degrees of freedom 
# Null hypothesis probability =   2.533981e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.832644 ( -0.257944  0.259286 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.41086e-08 ( -1.16961e-08  1.3523e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.937100   ( -1.36242   1.618 )
beta        : -9.37167    ( 9.99979   19.9998 )
Epeak [keV] : 14.4866      ( -7.30398 22.6392 )
Norm@50keV   : 9.22154E-02    ( -0.0612978   244.667 )
------------------------------------------------------------
# Chi-Squared =          62.64 using 59 PHA bins.
# Reduced chi-squared =          1.139 for     55 degrees of freedom 
# Null hypothesis probability =   2.236508e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.776377 ( -0.250865  0.250983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.1588e-08  1.06692e-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: 3.20077     ( -0.738926   1.08616 )
Norm@50keV  : 2.59888E-03    ( -0.00259792   0.0020862 )
------------------------------------------------------------
# Chi-Squared =          63.08 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     57 degrees of freedom 
# Null hypothesis probability =   2.700957e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.830797 ( -0.270891  0.271673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53179e-08 ( -1.34923e-08  1.51305e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08296     ( -5.08578   0.93727 )
Epeak [keV] : 13.9905      (   )
Norm@50keV  : 6.86396E-02    (     )
------------------------------------------------------------
# Chi-Squared =          62.00 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     56 degrees of freedom 
# Null hypothesis probability =   2.708258e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.824727 ( -0.266519  0.267093 ) 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       : -0.939897   ( -5.65207   1.62252 )
beta        : -9.37167    ( 10   20 )
Epeak [keV] : 14.5213      ( -7.24642 24.3593 )
Norm@50keV   : 9.03547E-02    ( -0.0920225   334.187 )
------------------------------------------------------------
# Chi-Squared =          62.03 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     55 degrees of freedom 
# Null hypothesis probability =   2.399506e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.776377 ( -0.250865  0.250983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.3614e-08 ( -1.1588e-08  1.06692e-08 ) ergs/cm2

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

S(25-50 keV)  = 1.15287e-08
S(50-100 keV) = 5.01026e-09

T90 vs. Hardness ratio plot

T90                                   = 1.02399998903275 sec.
Hardness ratio (energy fluence ratio) = 0.43459

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.755331
Count Ratio (50-100 keV) / (15-25 keV) = -0.111963

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 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-30.731410 -5.632000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9945 -15.6285    1.3  36.0  -83.0   1.1651   8.9    1.1	Sco X-1                       
254.3149  35.3377    7.1  47.6   -2.8   0.1828   1.6    7.0	Her X-1                       
255.7758 -37.7434   49.5  39.1 -122.7  -0.0271  -0.2   11.7	4U 1700-377                   
256.3681 -36.3995    3.7  37.8 -121.8   0.3140   3.1    3.5	GX 349+2                      
263.0787 -24.8605    5.9  25.4 -115.3  -0.1249  -2.0    7.9	GX 1+4                        
264.7442 -44.4508 1135.1  41.2 -137.1  -0.0010  -0.0    0.1	4U 1735-44                    
268.4808  -1.5625    7.2  12.4  -45.6   0.0748   1.6    9.4	SW J1753.5-0127               
270.4137 -25.0977    7.4  21.7 -129.2   0.0865   1.6    7.1	GX 5-1                        
270.2201 -25.9254    0.0  22.5 -129.8   0.0945   1.7   11.8	GRS 1758-258                  
274.0036 -14.2002    3.3  10.6 -119.1   0.1836   3.5    9.8	GX 17+2                       
275.7498 -30.3810    5.4  25.2 -144.8   0.1210   2.1    9.1	H1820-303                     
285.0978 -24.7251    0.0  19.7 -167.1  -0.0250  -0.5   12.2	HT1900.1-2455                 
288.6893  11.0564    2.7  18.6   52.9  -0.2489  -4.3    9.2	GRS 1915+105                  
299.5942  35.2081    2.1  44.6   48.7   1.2828   5.5    0.4	Cyg X-1

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

Time interval of the image:
0.000000 1.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.1253 -15.5883    4.7  35.9  -83.0  -0.0526  -2.4    9.0	Sco X-1                       
254.5827  35.3535    8.4  47.5   -2.5   0.0296   1.4    6.2	Her X-1                       
255.8283 -37.7364    5.7  39.1 -122.7   0.0457   2.0    9.9	4U 1700-377                   
256.4657 -36.3824   12.0  37.7 -121.9  -0.0201  -1.0    2.8	GX 349+2                      
262.9857 -24.8833    3.5  25.4 -115.2   0.0412   3.3    8.4	GX 1+4                        
264.7723 -44.5801    3.5  41.3 -137.2  -0.0647  -3.3    7.9	4U 1735-44                    
268.2964  -1.6523    0.0  12.5  -46.2   0.0155   1.6   12.7	SW J1753.5-0127               
270.2788 -25.2352  179.8  21.9 -129.1   0.0007   0.1    9.4	GX 5-1                        
270.2801 -25.8895  132.7  22.5 -129.9   0.0010   0.1    8.9	GRS 1758-258                  
273.9417 -13.9020    7.7  10.4 -117.8  -0.0156  -1.5    8.9	GX 17+2                       
275.8626 -30.2851    5.9  25.1 -145.0  -0.0217  -2.0    5.9	H1820-303                     
285.0277 -24.7570    7.9  19.8 -166.9  -0.0152  -1.5    9.8	HT1900.1-2455                 
288.8245  10.9700    6.7  18.6   53.4  -0.0189  -1.7    2.1	GRS 1915+105                  
299.5039  35.0650  111.5  44.5   48.7  -0.0047  -0.1    9.2	Cyg X-1                       
301.0195 -19.4722    2.1  24.6  152.5   0.0679   5.5 ------	UNKNOWN                       
295.3011 -11.6947    2.7  16.1  139.5   0.0434   4.3 ------	UNKNOWN                       
266.4180  26.8102    2.5  35.0    4.3   0.0632   4.6 ------	UNKNOWN                       
275.2414 -51.9974    2.5  46.6 -149.7   0.0962   4.6 ------	UNKNOWN                       
232.3307  10.2834    2.4  50.3  -45.6   0.2235   4.7 ------	UNKNOWN                       
235.5837  -1.4854    2.7  44.7  -60.4   0.1727   4.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
91.568590 583.198000
584.368000 962.408700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.9037 -62.8379    3.6  54.4 -151.6   5.9779   3.3    7.9	GX 301-2                      
255.9296 -37.8618    1.9  31.8  -86.5   4.5722   6.0    2.9	4U 1700-377                   
256.4303 -36.4645    4.6  32.4  -84.0   1.8341   2.5    2.5	GX 349+2                      
262.9529 -24.7809    4.6  36.8  -62.5   2.3461   2.5    3.7	GX 1+4                        
264.4669 -44.5019    0.0  22.9  -91.5   0.0594   0.1   12.2	4U 1735-44                    
270.4668 -25.0423    5.2  32.7  -52.9   1.3984   2.2   10.2	GX 5-1                        
270.3919 -25.9071    0.0  32.0  -53.9  -0.4694  -0.8   11.0	GRS 1758-258                  
273.8918 -14.0822    4.0  41.0  -39.6   2.3165   2.8    7.2	GX 17+2                       
275.9003 -30.3497    2.0  25.7  -50.5   2.6967   5.7    1.6	H1820-303                     
285.2146 -24.8372   75.1  27.2  -28.3   0.0727   0.2   10.9	HT1900.1-2455                 
 49.9543 -67.9354    3.3  51.6  150.3  10.4096   3.5 ------	UNKNOWN                       
117.4358 -75.4077    3.9  54.3  176.6   5.7462   3.0 ------	UNKNOWN                       
246.2039 -77.2374    2.6  33.0 -164.9   2.1992   4.4 ------	UNKNOWN                       
277.3614 -23.8348    2.1  30.7  -41.4   2.8479   5.5 ------	UNKNOWN                       
238.8398 -61.7518    3.2  33.4 -136.1   1.9020   3.6 ------	UNKNOWN                       
255.2094 -41.6250    1.4  30.2  -93.2   5.9468   8.2 ------	UNKNOWN

Plot creation:
Wed Feb 17 21:10:42 EST 2010