GRB140129A

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Mar  3 23:49:28 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger585128
======================================================================

  Trigger: 00585128      Segment: 000

  BAT Trigger Time: 412658651.008   [s; MET]
      Trigger Stop: 412658655.104   [s; MET]
               UTC: 2014-01-29T03:23:59.430600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 37.868986842113   Dec: -1.5867151917387  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.08
     Image Trigger?:     NO
     Rate S/N Ratio:     8.48528137423857  [ if not an image trigger ]
     Image S/N Ratio:    7.08

  Analysis Position:   [ source = BAT ]
    RA: 37.868986842113   Dec: -1.5867151917387  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 37.8569698796769   Dec: -1.58455560323377  [deg; J2000]  
        { 02h 31m 25.7s , -01d 35' 04.4" }
         +/- 2.34334837844173 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.973537501729152 [arcmin] (formal 1-sigma fit error)
    SNR: 9.01114567343337
 
  Angular difference between the analysis and refined position is 0.732297 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 3 +/- 1.4142135623731
        Measured from: 0.991999983787537
                   to: 3.99199998378754     [s; relative to TRIGTIME]
     T50: 2 +/- 1
        Measured from: 0.991999983787537
                   to: 2.99199998378754     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.99199998378754     
                   to: 2.99199998378754     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.991999983787537     
                   to: 3.99199998378754     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.082856   0.111878   0.025791   0.016275
           0.014433   0.014639   0.012815   0.011519 [error]
 Peak      0.026394   0.048005   0.023137   0.009458
           0.008378   0.008909   0.007742   0.006586 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    3.000    0.992    3.992
T90     3.000    0.992    3.992
T50     2.000    0.992    2.992
Peak    1.000    1.992    2.992
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.965    -0.342      0.313       -           -               -         4.62e-03     -1.05e-03          1.02e-03      53.440   57
CPL     -0.532    -1.603      4.741       38.335      N/A           N/A         3.52e-02        N/A               N/A         52.600   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.617     -0.459     0.426       -           -               -         6.75e-03     -1.80e-03          1.71e-03      34.970   57
CPL     -1.615     -1.845     1.173     9999.200      N/A           N/A         6.76e-03        N/A               N/A         34.970   56
 
 
=== 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         PL   2.75e-08  3.80e-08  3.90e-08  7.28e-08  1.28e-07  1.77e-07   erg/cm2
      90%_error_low -6.37e-09 -6.68e-09 -1.17e-08 -3.54e-08 -2.70e-08 -5.08e-08   erg/cm2
      90%_error_hi   6.55e-09  6.63e-09  1.22e-08  5.28e-08  2.81e-08  6.45e-08   erg/cm2
Peak flux       PL   3.11e-01  2.92e-01  1.90e-01  1.92e-01  8.73e-01  9.86e-01   ph/cm2/s
      90%_error_low -1.14e-01 -7.07e-02 -6.50e-02 -1.06e-01 -2.06e-01 -2.37e-01   ph/cm2/s
      90%_error_hi   1.24e-01  6.99e-02  6.35e-02  1.60e-01  2.06e-01  2.40e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -6.37e-09 -6.68e-09 -1.17e-08 -3.54e-08 -2.70e-08 -5.08e-08   erg/cm2
      90%_error_hi   6.55e-09  6.63e-09  1.22e-08  5.28e-08  2.81e-08  6.45e-08   erg/cm2
Peak flux      CPL   3.15e-01  2.89e-01  1.89e-01  2.04e-01  8.76e-01  1.00e+00   ph/cm2/s
      90%_error_low     N/A   -7.00e-02 -1.37e-01     N/A   -2.17e-01 -2.64e-01   ph/cm2/s
      90%_error_hi      N/A    8.92e-02  -4.48e-02     N/A    2.09e-01  2.14e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   37.8570    -1.5846   0.0214    26.4498   -79.7501         0.2406071      9.011 TRIG_00585128                 
 
Foreground time interval of the image:
  0.992   3.992 (delta_t =   3.000 [sec])
Background time interval of the image:
-93.507   0.992 (delta_t =  94.499 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from    0.992 sec. to    3.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.96543     ( -0.342146   0.312558 )
Norm@50keV  : 4.62180E-03    ( -0.00105494   0.00101714 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.44 using 59 PHA bins.
# Reduced chi-squared =         0.9376 for     57 degrees of freedom 
# Null hypothesis probability =   6.092528e-01
 
Photon flux (15-150 keV)    in 3 sec: 0.682526 ( -0.117313  0.117312 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.27688e-07 ( -2.70251e-08  2.8095e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.992 sec. to    3.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.532294     ( -1.63984   4.70415 )
Epeak [keV] : 38.3347      (   )
Norm@50keV  : 3.51644E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.60 using 59 PHA bins.
# Reduced chi-squared =         0.9393 for     56 degrees of freedom 
# Null hypothesis probability =   6.043720e-01
 
Photon flux (15-150 keV)    in 3 sec: 0.645688 ( -0.136295  0.135735 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.992 sec. to    2.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.61677     ( -0.459123   0.425897 )
Norm@50keV  : 6.75408E-03    ( -0.00179547   0.00171346 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.97 using 59 PHA bins.
# Reduced chi-squared =         0.6134 for     57 degrees of freedom 
# Null hypothesis probability =   9.905602e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.872529 ( -0.206061  0.206231 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.30493e-08 ( -1.74551e-08  1.78957e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.992 sec. to    2.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.40983     ( -1.04944   1.96782 )
Epeak [keV] : 142.416      (   )
Norm@50keV  : 2.55573E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.03 using 59 PHA bins.
# Reduced chi-squared =         0.6077 for     56 degrees of freedom 
# Null hypothesis probability =   9.910713e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.875602 ( -0.217293  0.209348 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.33505e-08 ( -1.90611e-08  1.30559e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 3.0 sec.
Hardness ratio (energy fluence ratio) = 1.02428285145

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 6.549734e-08
S(50-150 keV) = 6.219086e-08

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = 8.852375190618189E-02, IMY = 4.895486352470583E-01

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:
-93.507400 0.992000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6285  22.0173    0.6  28.2   56.8   3.5223  18.6    0.3	Crab                          
 40.7639 -27.3292    2.3  36.3 -127.3   1.0087   5.1 ------	UNKNOWN                       
 31.0869 -33.4299    2.3  46.5 -125.1   3.0526   4.9 ------	UNKNOWN                       
 32.2592 -36.7258    2.8  48.0 -129.2   2.4079   4.1 ------	UNKNOWN

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

Time interval of the image:
0.992000 3.992000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6298  22.0135  201.4  28.2   56.8   0.0017   0.1    0.2	Crab                          
 96.4971 -25.7720    2.3  41.2  149.0   0.2283   5.0 ------	UNKNOWN                       
 56.9724 -33.0660    3.2  34.8 -153.4   0.0925   3.6 ------	UNKNOWN                       
 37.8569  -1.5845    1.3  26.4  -79.8   0.2406   9.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
97.892640 963.052000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 27.9265  47.4822    3.0  49.8    9.3   5.2976   3.8 ------	UNKNOWN                       
359.5146 -18.1996    4.3  41.1  -98.2   8.6056   2.7 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

Mask shadow pattern

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve