gemini_instruments.gsaoi package

class gemini_instruments.gsaoi.AstroDataGsaoi(provider)[source]

Bases: AstroDataGemini

array_name()[source]

Returns a list of the array names of each extension

Returns: names of the arrays
Return type: list/str

central_wavelength(asMicrometers=False, asNanometers=False, asAngstroms=False)[source]

Returns the central wavelength in meters or the specified units

Parameters

asMicrometers (bool) – If True, return the wavelength in microns
asNanometers (bool) – If True, return the wavelength in nanometers
asAngstroms (bool) – If True, return the wavelength in Angstroms

Returns

The central wavelength setting

Return type

float

gain()[source]

Returns the gain (electrons/ADU) of the extensions

Returns: gain (e/ADU)
Return type: list/float

group_id()[source]

Returns a string representing a group of data that are compatible with each other. This is used when stacking, for example. Each instrument and mode of observation will have its own rules.

Returns: A group ID for compatible data
Return type: str

is_coadds_summed()[source]

Tells whether or not the co-adds have been summed. If not, they have been averaged. GSAOI averages them.

Returns: True if the data has been summed. False if it has been averaged.
Return type: bool

nominal_photometric_zeropoint()[source]

Returns the nominal zeropoints (i.e., the magnitude corresponding to a pixel value of 1) for the extensions in an AD object. Zeropoints in table are for electrons, so subtract 2.5*lg(gain) if the data are in ADU

Returns: zeropoint values, one per SCI extension
Return type: float/list

non_linear_level()[source]

Returns the level at which the data become non-linear, in ADU.

Returns: Value at which the data become non-linear
Return type: int/list

nonlinearity_coeffs()[source]

For each extension, return a tuple (a0,a1,a2) of coefficients such that the linearized counts are a0 + a1*c _ a2*c^2 for raw counts c

Returns: coefficients
Return type: tuple/list

read_noise()[source]

Returns the read noise of each extension in electrons, as a float or a list of floats

Returns: read noise in electrons
Return type: float/list

read_speed_setting()[source]

Returns a string describing the read speed setting, as used in the OT

Returns: read speed setting
Return type: str

saturation_level()[source]

Returns the saturation level in ADU for each extension, as a list or a single value

Returns: saturation level in ADU
Return type: int/list

wcs_dec()[source]

Returns the Declination of the center of the field based on the WCS rather than the DEC keyword. This just uses the CRVAL2 keyword.

Returns: declination in degrees
Return type: float

wcs_ra()[source]

Returns the Right Ascension of the center of the field based on the WCS rather than the RA keyword. This just uses the CRVAL1 keyword.

Returns: right ascension in degrees
Return type: float

Submodules

gemini_instruments.gsaoi.adclass module

class gemini_instruments.gsaoi.adclass.AstroDataGsaoi(provider)[source]