gemini_instruments.nifs package¶

class gemini_instruments.nifs.AstroDataNifs(nddata=None, tables=None, phu=None, indices=None)[source]¶

Bases: gemini_instruments.gemini.adclass.AstroDataGemini

filter_name(stripID=False, pretty=False)[source]¶

Returns the name of the filter(s) used. The component ID can be removed with either ‘stripID’ or ‘pretty’. If ‘pretty’ is True, filter positions such as ‘Open’, ‘Dark’, ‘blank’, and others are removed leaving only the relevant filters in the string.

Parameters

stripID (bool) – If True, removes the component ID and returns only the name of the filter.
pretty (bool) – Same as for stripID. Pretty here does not do anything more.

Returns

The name of the filter with or without the component ID.

Return type

str

gain()[source]¶

Returns the gain used for the observation. A lookup table is uses to compare the bias value in the headers to the bias values associate with the various gain settings.

Returns: Gain used for the observation.
Return type: float

gcal_lamp()[source]¶

Returns the name of the GCAL lamp being used, or “Off” if no lamp is in used. This applies to flats and arc observations when a lamp is used. For other types observation, None is returned.

This overrides the gemini level descriptor, as NIFS has more lamp names than are accommodated by that descriptor function.

Returns: lamps – Name of the GCAL lamp, or “Off”
Return type: <str>

non_linear_level()[source]¶

Returns the level at which the array becomes non-linear. The return units are ADUs. A lookup table is used. Whether the data has been corrected for non-linearity or not is taken into account. A list is returned unless called on a single-extension slice.

Returns: Level in ADU at which the non-linear regime starts.
Return type: int/list

pixel_scale()[source]¶

Returns the pixel scale in arc seconds. A lookup table indexed on focal_plane_mask, disperser, and filter_name is used.

Returns: Pixel scale in arcsec.
Return type: lfloat

read_mode()[source]¶

Returns the read mode for the observation. The read mode is directly associated with the LNRS header keyword value.

Returns: Read mode for the observation.
Return type: str

read_noise()[source]¶

Returns the detector read noise, in electrons. A lookup table is used. The read noise depends on the gain setting and is affected by the number of coadds and non-destructive pairs. A list is returned unless called on a single-extension slice.

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

saturation_level()[source]¶

Returns the saturation level for the observation, in ADUs A lookup table is used to get the full well value based on the gain. A list is returned unless called on a single-extension slice.

Returns: Saturation level in ADUs.
Return type: int/list

Submodules¶

gemini_instruments.nifs.adclass module¶

class gemini_instruments.nifs.adclass.AstroDataNifs(nddata=None, tables=None, phu=None, indices=None)[source]¶