# ContinuumSub_AT — Subtracts continuum emission from a cube.¶

This module defines the ContinuumSub_AT class.

class admit.at.ContinuumSub_AT.ContinuumSub_AT(**keyval)[source]

Continuum subtraction from a cube. Produces a line cube and continuum map.

Based on line segments found (usually from LineSegments_AT from a CubeStats_BDP) this AT will fit the continuum in channels not covered by the line segments. The continuum segments can also be explicitly given. This AT is meant for the automated continuum subtraction via LineSegments_AT.

Although both are optional, you need to given either a LineSegment list, or explicitly define the contsub continuum segments.

Keywords

contsub: list of tuples
List a set of channel segments, 0 based and edges included, where the continuum is fitted. For example [(100,200),(800,900)]. Default: []
Widen the line segments from a LineList_BDP if that was given. For insane reasons negative numbers are also allowed to narrow the segments. It will apply pad channels on either side of the segments. Default: 5
fitorder: integer
Order of continuum fit polynomial. Default: 0

Input BDPs

SpwCube_BDP: count: 1
Input spectral window cube; e.g., as output by Ingest_AT.
LineSegemnt_BDP or LineList_BDP: count: 1 (optional)
Optional line list, usually derived from LineSegment_AT, although LineID_AT output should also work. If given, the contsub= is ignored.

Output BDPs

SpwCube_BDP: 1
Output Line Cube which should now be continuum free. New extension will be ”.lim”
Image_BDP: 1
Output Continuum Map. New extension will be ”.cim”
Graphics Produced
TBD
Parameters: keyval : dictionary, optional

Attributes

 _version (string)

Methods

 addinput(item[, slot]) Add a BDP input to an AT. addinputbdp(item[, slot, insert]) Add a BDP to the _bdp_in list. addoutput(item[, slot]) Add a BDP output product to an AT. addoutputbdp(item[, slot, insert]) Add a BDP to the _bdp_out list. baseDir([path]) Get/set project base directory. bestMatch(at1, at2) Determines the better match of two tasks to the current one. checkfiles() Check if the files from all the BDP_out’s in an AT exist. checktype(item) Check the type of an object to see if it is a BDP. clearinput() Clear the input BDP list. clearoutput([delete]) Clear the output BDP list. copy() Creates an independent duplicate of the task. delete() Method to delete the AT and underlying BDPs. delinput(slot) Delete a specific BDP in the _bdp_in list. deloutput(slot) Delete a specific BDP in the _bdp_out list. dir([filename]) Absolute directory reference of the ADMIT project. dryrun() Method to do a dry run of the AT, generally just checks input values for errors. enabled([state]) Returns current task enabled setting, with optional reset. execute([args]) Executes the task. freeAlias(aliases[, alias]) Deletes alias reservation, if present. get(attrib) Method to get the given attributes value getProject() Retrieves project ID associated with the task. getVersion() Return the version string. getdtd(fl) Method to write out the dtd data. geteffectivelevel() Method to get the effective logging level of the logging subsystem getkey(key) Retrieval value for a key. getloggername() Method to get the name of the logger for this AT instance getlogginglevel() Method to get the current logging level of the AT haskey(key) Query if a key exists for an AT. html(inheader) Method to represent the current AT in HTML format. id([strip]) Returns task ID number. isAutoAlias([withEmpty, compat]) Whether the task alias appears to be auto-generated. isequal(at) Method to determine if two ATs are the same. isstale() Returns whether the AT is out of date. len2() Returns the length of _bdp_in and _bdp_out in a tuple. link() Increments the task link count. markChanged() Mark an AT that it’s state was changed, so it would need to be rerun. markUpToDate() Resets _stale to indicate that the AT does not need to be run. merge(at[, aliases]) Merges attributes from another task. mkdir(dirname) Make a directory in the ADMIT hierarchy. mkext(filename, ext[, alias]) Return a new filename with a new extension with optional ADMIT alias. newId(tid) Assigns the task a new ID number. reset(a) Performs an in-place shallow copy. run() The run method creates the BDP. running([state]) Returns current task execution flag, with optional reset. save() Save (write) any BDPs connected to this AT. set(item, val) Method to set protected attributes, rather than direct access setAlias(aliases[, alias, auto]) Sets and registers the task alias, guaranteed unique among registered aliases. setProject(pid) Adds a project ID to task ID. set_bdp_in([bdpin]) Validate the _valid_bdp_in list and digest it into the appropriate attributes. set_bdp_out([bout]) Validate the _valid_bdp_out list and digest it into the appropriate attributes. seteffectivelevel(level) Method to set the effective logging level of the logging subsystem setkey([name, value, isinit]) Set keyword value. setloggername(name) Method to set the name of the logger for this AT instance setlogginglevel(level) Method to set the logging level show() Return the AT type. statusicons() return some html icons representing the enabled/stale status of this task summary() Returns the summary dictionary from the AT, for merging into the ADMIT Summary object. unlink() Decrements the task link count. userdata() Returns the user dictionary from the AT, for merging into the ADMIT userdata object. validateinput([describe]) Method to validate the _bdp_in’s against a dictionary of expected types. validatekeys() Method to error check all input keys. write(node) Method to write the AT to disk.
run()[source]

The run method creates the BDP.

Parameters: None None
summary()[source]

Returns the summary dictionary from the AT, for merging into the ADMIT Summary object.