Chi2Grid

class gdt.missions.fermi.gbm.localization.Chi2Grid

Bases: object

Class for the GBM legacy internal Chi2Grid localization files/objects.

Attributes Summary

azimuth	The spacecraft azimuth grid points
chisq	The chi-squared value at each grid point
dec	The Dec grid points
numpts	Number of sky points in the Chi2Grid
quaternion	The spacecraft attitude quaternion
ra	The RA grid points
scpos	The spacecraft position in Earth inertial coordinates
significance	The significance value at each point
trigtime	The trigger time
zenith	The spacecraft zenith grid points

Methods Summary

from_data(az, zen, ra, dec, chisq)	Create a Chi2Grid object from arrays
open(filename)	Read a chi2grid file and create a Chi2Grid object

Attributes Documentation

azimuth

The spacecraft azimuth grid points

Type:

(np.array)

chisq

The chi-squared value at each grid point

Type:

(np.array)

dec

The Dec grid points

Type:

(np.array)

numpts

Number of sky points in the Chi2Grid

Type:

(int)

quaternion

The spacecraft attitude quaternion

Type:

(np.array)

ra

The RA grid points

Type:

(np.array)

scpos

The spacecraft position in Earth inertial coordinates

Type:

(np.array)

significance

The significance value at each point

Type:

(np.array)

trigtime

The trigger time

Type:

(float)

zenith

The spacecraft zenith grid points

Type:

(np.array)

Methods Documentation

classmethod from_data(az, zen, ra, dec, chisq)

Create a Chi2Grid object from arrays

Parameters:

• az (np.array) – The azimuth grid points

• zen (np.array) – The zenith grid points

• ra (np.array) – The RA grid points

• dec (np.array) – The Dec grid points

• chisq (np.array) – The chi-squared values at each grid point

Returns:

Chi2Grid – The Chi2Grid object

classmethod open(filename)

Read a chi2grid file and create a Chi2Grid object

Parameters:

filename (str) – The filename of the chi2grid file

Returns:

Chi2Grid – The Chi2Grid object