batgrbproduct analysis for trigger=356881

batgrbproduct Analysis for Trigger=356881

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): Thu Jul  9 23:38:05 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger356881/GCN5_download_cron
======================================================================

  Trigger: 00356881      Segment: 000

  BAT Trigger Time: 268812154.944   [s; MET]
      Trigger Stop: 268812155.968   [s; MET]
               UTC: 2009-07-09T06:02:30.048700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 348.213464633462   Dec: 35.4881673194797  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.12
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8452325786651  [ if not an image trigger ]
     Image S/N Ratio:    6.12

  Flight Position:   [ source = BAT ]
    RA: 348.213464633462   Dec: 35.4881673194797  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 348.250544689604   Dec: 35.5048927876  [deg; J2000]  
        { 23h 13m 00.1s , +35d 30' 17.6" }
         +/- nan [arcmin] (estimated 90% radius based on SNR)
         +/- 1.00589354222653 [arcmin] (formal 1-sigma fit error)
    SNR: -6.07596002166
 
  Angular difference between Flight and Ground position is 2.070741 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 0.11599999666214 +/- 0.004
        Measured from: 106.132000088692
                   to: 106.248000085354     [s; relative to TRIGTIME]
     T50: 0.0799999237060547 +/- 0.004
        Measured from: 106.152000129223
                   to: 106.232000052929     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 105.698000013828     
                   to: 106.698000013828     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 106.131999969482     
                   to: 106.259999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.007289  -0.006153  -0.011074  -0.014155
           0.002973   0.003415   0.003986   0.004580 [error]
 Peak     -0.007763  -0.006066  -0.011336  -0.012917
           0.003013   0.003504   0.004072   0.004652 [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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 2.79e-10 1.75e-10 3.29e-10 1.80e-08 1.03e-09 1.82e-08   erg/cm2
Peak flux Power-law 5.98e-04 3.50e-03 1.78e-02 3.95e-01 5.70e-02 0.00e+00   ph/cm2/s
              Error 2.54e-02 2.17e-02 4.20e-02 8.06e-01 1.18e-01 0.00e+00   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 3.02e-10 2.81e-10 4.52e-10 2.05e-08 1.05e-09 2.07e-08   erg/cm2
Peak flux Cutoff-PL 4.94e-04 3.18e-03 1.79e-02 4.67e-01 5.95e-02 0.00e+00   ph/cm2/s
              Error 2.50e-02 2.15e-02 4.19e-02 9.16e-01 1.18e-01 0.00e+00   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    1.500    0.000    -      -           0.00e+00 5.72e-04   65.690 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   65.690 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.500    0.000    -      -           0.00e+00 8.39e-04   60.930 57
CPL   1.000    0.000      50.0    0.0      0.00e+00 0.00e+00   60.930 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    0.128  106.132  106.260
T90     0.116  106.132  106.248
T50     0.080  106.152  106.232
Peak    1.000  105.698  106.698

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
  348.2505 +35.5049 0.0316   21.3   -0.5      -0.0452    -6.1  TRIG_00356881       
------------------------------------------
 
Foreground time interval of the image:
106.132 106.260 (delta_t =   0.128 [sec])
Background time interval of the image:
-60.944 106.132 (delta_t = 167.076 [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

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)

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  106.132 sec. to  106.260 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   0.00114459 )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.010634e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 0.0 ( 0  0.168134 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  2.06734e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from  106.132 sec. to  106.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     ( -1   -1 )
Epeak [keV] : 50.0000      ( -50 -50 )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.173 for     56 degrees of freedom 
# Null hypothesis probability =   1.761881e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 0.0 ( 0  0.168178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  2.09932e-09 ) ergs/cm2

Band function

Time interval is from  106.132 sec. to  106.260 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( 0.98395   0.98395 )
beta        : -2.50000    ( 2.5   2.5 )
Epeak [keV] : 80.0000      ( -80 -80 )
Norm@50keV   : 0.0    ( 0   515656 )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     55 degrees of freedom 
# Null hypothesis probability =   1.532243e-01
 
Photon flux (15-150 keV)    in 0.128 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 5.00000  (-5  -5)
R^2/D10^2   : 0.0  (0   0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.010634e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.010634e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.00000        (-4      -4)
R1^2/D10^2  : 0.0        (0      0)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     55 degrees of freedom 
# Null hypothesis probability =   1.532243e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model

Time interval is from  105.698 sec. to  106.698 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   0.00167796 )
------------------------------------------------------------
# Chi-Squared =          60.93 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.363394e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.69813E-02 ( -0.0569808  0.179157 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.63714e-09 ( -9.63714e-09  2.83938e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  105.698 sec. to  106.698 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     ( -1   -1 )
Epeak [keV] : 50.0000      ( -50 -50 )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
# Chi-Squared =          60.93 using 59 PHA bins.
# Reduced chi-squared =          1.088 for     56 degrees of freedom 
# Null hypothesis probability =   3.029899e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.94780E-02 ( -0.059478  0.176522 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2788e-08 ( -1.2788e-08  2.73833e-08 ) ergs/cm2

Band function

Time interval is from  105.698 sec. to  106.698 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.99134   ( 0.98395   0.98395 )
beta        : -2.42036    ( -1.10446   -1.10446 )
Epeak [keV] : 10000.00      ( -1.54751e+08 -1.54751e+08 )
Norm@50keV   : 1.47288E-04    ( -0.000145249   0.00138511 )
------------------------------------------------------------
# Chi-Squared =          60.42 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     55 degrees of freedom 
# Null hypothesis probability =   2.862929e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 5.00000  (-5  -5)
R^2/D10^2   : 0.0  (0   0)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          60.93 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.363394e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.00000       (-7      -7)
Norm        : 0.0       (0     0)
------------------------------------------------------------
# Chi-Squared =          60.93 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.363394e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 199.354        (      )
R1^2/D10^2  : 2.83385E-05        (-3.0201e-05      -3.0201e-05)
kT2 [keV]   : 10.0000        (-10      -10)
R2^2/D10^2  : 0.0    (0   0)
------------------------------------------------------------
# Chi-Squared =          60.93 using 59 PHA bins.
# Chi-Squared =          60.72 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     55 degrees of freedom 
# Reduced chi-squared =          1.104 for     55 degrees of freedom 
# Null hypothesis probability =   2.710209e-01
# Null hypothesis probability =   2.774008e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

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: 1.50000     ( -1.5   -1.5 )
Norm@50keV  : 0.0    ( 0   0.00114459 )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   2.010634e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 0.0 ( 0  0.168134 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  2.06734e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     ( -1   -1 )
Epeak [keV] : 50.0000      ( -50 -50 )
Norm@50keV  : 0.0    (     )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.173 for     56 degrees of freedom 
# Null hypothesis probability =   1.761881e-01
 
Photon flux (15-150 keV)    in 0.128 sec: 0.0 ( 0  0.168178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  2.09932e-09 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( 0.98395   0.98395 )
beta        : -2.50000    ( 2.5   2.5 )
Epeak [keV] : 80.0000      ( -80 -80 )
Norm@50keV   : 0.0    ( 0   553218 )
------------------------------------------------------------
# Chi-Squared =          65.69 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     55 degrees of freedom 
# Null hypothesis probability =   1.532243e-01
 
Photon flux (15-150 keV)    in 0.128 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)  = 0
S(50-100 keV) = 0

T90 vs. Hardness ratio plot

T90                                   = 0.11599999666214 sec.
Hardness ratio (energy fluence ratio) =

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.844149
Count Ratio (50-100 keV) / (15-25 keV) = 1.51928

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:
-60.944000 106.132000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6320  35.2689    5.6  52.9  157.7  -6.9402  -2.0    9.6	Her X-1                       
299.6294  35.1810    1.6  24.6  118.1   5.5313   7.1    2.3	Cyg X-1                       
308.0175  41.1432   60.7  15.7  117.7  -0.1159  -0.2   12.2	Cyg X-3                       
326.2416  38.3411    4.1  11.7   56.7   1.4562   2.8    3.5	Cyg X-2                       
306.6072  33.2993    2.7  22.3  103.9   2.8677   4.3 ------	UNKNOWN                       
246.4059  45.0024    2.5  51.8  172.3   8.2305   4.6 ------	UNKNOWN                       
 17.1555  20.9246    3.3  49.0  -17.8   4.3832   3.5 ------	UNKNOWN

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

Time interval of the image:
106.132000 106.260000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3829  35.4366    5.9  52.9  158.0  -0.0791  -1.9    6.7	Her X-1                       
299.4777  35.2343    5.1  24.7  118.4  -0.0218  -2.2    5.9	Cyg X-1                       
308.1016  40.9319  168.9  15.8  116.9   0.0006   0.1    1.3	Cyg X-3                       
326.3786  38.2948    6.2  11.7   56.1   0.0128   1.9    9.9	Cyg X-2                       
323.9339  16.0927    2.0  34.0   59.6   0.0812   5.7 ------	UNKNOWN                       
309.2733  51.5581    2.7  11.1  159.5   0.0319   4.2 ------	UNKNOWN                       
233.5871  52.8629    2.5  53.9 -173.5   0.1003   4.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Mon Feb 15 23:28:43 EST 2010