Catalogue mixins

In addition to the raw data, Marvin provides additional catalogue information about the object via several attributes that are available for most Tools classes.

DRPall / NSA

Data from the NASA Sloan Atlas can be accessed for each Cube, RSS, Maps, and ModelCube object via the nsa attribute. The feature is implemented as part of the NSAMixIn class. For example:

>>> my_cube = Cube('8485-1901', mode='remote')
>>> my_cube.nsa
{'iauname': 'J153010.73+484124.8',
'subdir': '15h/p48/J153010.73+484124.8',
'ra': 232.544703894,
'dec': 48.6902009334,
'isdss': 225926,
'ined': 167868,
'isixdf': -1,
'ialfalfa': -1,
'izcat': 373580,
'itwodf': -1,
'mag': 17.3247,
'z': 0.0407447,
'zsrc': 'sdss   ',
'size': 0.07,

How much NSA information is available depends on the mode in which the object was created. If you instantiated the Tools object from a file, Marvin will try to use the local DRPall file, which contains only a subset of the NSA data. If loaded remotely, Marvin will make an API call to retrieve the full NSA information from the server. You can change this behaviour during instantiation by setting the nsa_source attribute from 'drpall' to 'nsa'

>>> my_cube_from_file = Cube('path/to/file/manga-8485-1901-LOGCUBE.fits.gz', nsa_source='nsa')


The DAPall file contains galaxy-summed, derived information from the Data Analysis Pipeline, such as total fluxes, SFR, etc. Similarly to the NSA data, it can be accessed from Maps and ModelCube objects via the dapall attribute in the DAPallMixIn

>>> maps.dapall
{'plate': 8485,
 'ifudesign': 1901,
 'plateifu': '8485-1901',
 'mangaid': '1-209232',
 'drpallindx': 3505,
 'mode': 'CUBE',
 'daptype': 'SPX-GAU-MILESHC',
 'dapdone': 'true',
 'objra': 232.545,
 'objdec': 48.6902,
 'ifura': 232.545,
 'ifudec': 48.6902,

Value-Added Catalogs (VACS)

While the core of SDSS data releases centers around its base projects’ science deliverables, smaller teams frequently contribute added value to its core deliverables with additional science products. These value-added data products or catalogs (VACS) are derived data products based on the core deliverables that are vetted, hosted, and released by SDSS in order to maximize the impact of SDSS data sets.

Marvin provides access to any VACs that have been contributed into Marvin’s framework. For members of the SDSS collaboration, to contribute a MaNGA VAC to Marvin, see how to contribute. Marvin collects all contributed VACs for a given release and places them inside a VACContainer object. This container is available as a vacs attribute on most Marvin Tools relevant to that VAC as well as as a separate VACs tool class.

Target Specific VAC Access

When navigating individual targets in Marvin, e.g. via the Cube or Maps tools, to access any available VAC information specific to that target, use the vacs attribute attached to most Marvin Tools.

>>> # enable Marvin for public data access
>>> from marvin import config
>>> config.setRelease('DR15')

>>> # load a MaNGA cube and access any VAC information for 8485-1901
>>> from import Cube
>>> cube = Cube('8485-1901')
>>> cube.vacs
    <VACContainer ('firefly', 'galaxyzoo', 'gema', 'HI', 'visual_morphology')>

>>> # it is also available from a Maps object
>>> maps = cube.getMaps()
>>> m.vacs
    <VACContainer ('firefly', 'galaxyzoo', 'gema', 'HI', 'visual_morphology')>

The VACContainer will list the names of all available VACS for the current release. These names are dottable attributes on the class. For example, the MaNGA DR15 release contains the MaNGA Galaxy Zoo VAC, which has been integrated into Marvin. It is available as galaxyzoo.

>>> # access the Galaxy Zoo VAC
>>> gz = cube.vacs.galaxyzoo
>>> print(gz)
    FITS_rec([(221394, 'J153010.73+484124.8', 19., 48.69020093, 232.54470389, '1-209232', 6318., 48.69020093, 232.54470389, 'original', 44., 0.93617021, 0.95360705, 44., 0.95631384, 2., 0.04255319, 0.22727273, 2., 0.04346881, 1., 0.0212766, 0., 0.01, 0.00021734, 47., 46.01, 0., 0., 0., 0., 0., 2., 1., 1., 2., 1., 2., 2., 0., 0., 0., 0., 0., 2., 1., 1., 2., 1., 2., 2., 0., 0., 0., 0., 0., 2., 1., 1., 2., 1., 2., 2., 0., 0., 0., 0., 0., 1., 0.5, 0.46666667, 1., 0.5, 0., 0., 0., 0., 0., 1., 0.5, 0.28125, 1., 0.5, 2., 2., 1., 0.02173913, 0.0952381, 1., 0.02173913, 45., 0.97826087, 0.84090909, 45., 0.97826087, 46., 46., 21., 0.47727273, 0.48571429, 21., 0.47727273, 23., 0.52272727, 0.33333333, 23., 0.52272727, 0., 0., 0., 0., 0., 44., 44., 0., nan, 1., 0., nan, 0., nan, 0.11111111, 0., nan, 0., nan, 0.22580645, 0., nan, 0., 0., 0., nan, 0., 0., nan, 0., nan, 1., 0., nan, 0., nan, 0.96525097, 0., nan, 0., 0., 0., nan, 0.4, 0., nan, 0., nan, 0.73809524, 0., nan, 0., nan, 0.12121212, 0., nan, 0., nan, 0.04651163, 0., nan, 0., nan, 0.1, 0., nan, 0., nan, 0., 0., nan, 0., 0.)],
        dtype=(numpy.record, [('nsa_id', '>i8'), ('IAUNAME', 'S19'), ('IFUDESIGNSIZE', '>f8'), ('IFU_DEC', '>f8'), ('IFU_RA', '>f8'), ('MANGAID', 'S8'), ('MANGA_TILEID', '>f8'), ('OBJECT_DEC', '>f8'), ('OBJECT_RA', '>f8'), ('survey', 'S77'), ('t01_smooth_or_features_a01_smooth_count', '>f8'), ('t01_smooth_or_features_a01_smooth_count_fraction', '>f8'), ('t01_smooth_or_features_a01_smooth_debiased', '>f8'), ('t01_smooth_or_features_a01_smooth_weight', '>f8'), ('t01_smooth_or_features_a01_smooth_weight_fraction', '>f8'), ('t01_smooth_or_features_a02_features_or_disk_count', '>f8'), ('t01_smooth_or_features_a02_features_or_disk_count_fraction', '>f8'), ('t01_smooth_or_features_a02_features_or_disk_debiased', '>f8'), ('t01_smooth_or_features_a02_features_or_disk_weight', '>f8'), ('t01_smooth_or_features_a02_features_or_disk_weight_fraction', '>f8'), ('t01_smooth_or_features_a03_star_or_artifact_count', '>f8'), ('t01_smooth_or_features_a03_star_or_artifact_count_fraction', '>f8'), ('t01_smooth_or_features_a03_star_or_artifact_debiased', '>f8'), ('t01_smooth_or_features_a03_star_or_artifact_weight', '>f8'), ('t01_smooth_or_features_a03_star_or_artifact_weight_fraction', '>f8'), ('t01_smooth_or_features_count', '>f8'), ('t01_smooth_or_features_weight', '>f8'), ('t02_edgeon_a04_yes_count', '>f8'), ('t02_edgeon_a04_yes_count_fraction', '>f8'), ('t02_edgeon_a04_yes_debiased', '>f8'), ('t02_edgeon_a04_yes_weight', '>f8'), ('t02_edgeon_a04_yes_weight_fraction', '>f8'), ('t02_edgeon_a05_no_count', '>f8'), ('t02_edgeon_a05_no_count_fraction', '>f8'), ('t02_edgeon_a05_no_debiased', '>f8'), ('t02_edgeon_a05_no_weight', '>f8'), ('t02_edgeon_a05_no_weight_fraction', '>f8'), ('t02_edgeon_count', '>f8'), ('t02_edgeon_weight', '>f8'), ('t03_bar_a06_bar_count', '>f8'), ('t03_bar_a06_bar_count_fraction', '>f8'), ('t03_bar_a06_bar_debiased', '>f8'), ('t03_bar_a06_bar_weight', '>f8'), ('t03_bar_a06_bar_weight_fraction', '>f8'), ('t03_bar_a07_no_bar_count', '>f8'), ('t03_bar_a07_no_bar_count_fraction', '>f8'), ('t03_bar_a07_no_bar_debiased', '>f8'), ('t03_bar_a07_no_bar_weight', '>f8'), ('t03_bar_a07_no_bar_weight_fraction', '>f8'), ('t03_bar_count', '>f8'), ('t03_bar_weight', '>f8'), ('t04_spiral_a08_spiral_count', '>f8'), ('t04_spiral_a08_spiral_count_fraction', '>f8'), ('t04_spiral_a08_spiral_debiased', '>f8'), ('t04_spiral_a08_spiral_weight', '>f8'), ('t04_spiral_a08_spiral_weight_fraction', '>f8'), ('t04_spiral_a09_no_spiral_count', '>f8'), ('t04_spiral_a09_no_spiral_count_fraction', '>f8'), ('t04_spiral_a09_no_spiral_debiased', '>f8'), ('t04_spiral_a09_no_spiral_weight', '>f8'), ('t04_spiral_a09_no_spiral_weight_fraction', '>f8'), ('t04_spiral_count', '>f8'), ('t04_spiral_weight', '>f8'), ('t05_bulge_prominence_a10_no_bulge_count', '>f8'), ('t05_bulge_prominence_a10_no_bulge_count_fraction', '>f8'), ('t05_bulge_prominence_a10_no_bulge_debiased', '>f8'), ('t05_bulge_prominence_a10_no_bulge_weight', '>f8'), ('t05_bulge_prominence_a10_no_bulge_weight_fraction', '>f8'), ('t05_bulge_prominence_a11_just_noticeable_count', '>f8'), ('t05_bulge_prominence_a11_just_noticeable_count_fraction', '>f8'), ('t05_bulge_prominence_a11_just_noticeable_debiased', '>f8'), ('t05_bulge_prominence_a11_just_noticeable_weight', '>f8'), ('t05_bulge_prominence_a11_just_noticeable_weight_fraction', '>f8'), ('t05_bulge_prominence_a12_obvious_count', '>f8'), ('t05_bulge_prominence_a12_obvious_count_fraction', '>f8'), ('t05_bulge_prominence_a12_obvious_debiased', '>f8'), ('t05_bulge_prominence_a12_obvious_weight', '>f8'), ('t05_bulge_prominence_a12_obvious_weight_fraction', '>f8'), ('t05_bulge_prominence_a13_dominant_count', '>f8'), ('t05_bulge_prominence_a13_dominant_count_fraction', '>f8'), ('t05_bulge_prominence_a13_dominant_debiased', '>f8'), ('t05_bulge_prominence_a13_dominant_weight', '>f8'), ('t05_bulge_prominence_a13_dominant_weight_fraction', '>f8'), ('t05_bulge_prominence_count', '>f8'), ('t05_bulge_prominence_weight', '>f8'), ('t06_odd_a14_yes_count', '>f8'), ('t06_odd_a14_yes_count_fraction', '>f8'), ('t06_odd_a14_yes_debiased', '>f8'), ('t06_odd_a14_yes_weight', '>f8'), ('t06_odd_a14_yes_weight_fraction', '>f8'), ('t06_odd_a15_no_count', '>f8'), ('t06_odd_a15_no_count_fraction', '>f8'), ('t06_odd_a15_no_debiased', '>f8'), ('t06_odd_a15_no_weight', '>f8'), ('t06_odd_a15_no_weight_fraction', '>f8'), ('t06_odd_count', '>f8'), ('t06_odd_weight', '>f8'), ('t07_rounded_a16_completely_round_count', '>f8'), ('t07_rounded_a16_completely_round_count_fraction', '>f8'), ('t07_rounded_a16_completely_round_debiased', '>f8'), ('t07_rounded_a16_completely_round_weight', '>f8'), ('t07_rounded_a16_completely_round_weight_fraction', '>f8'), ('t07_rounded_a17_in_between_count', '>f8'), ('t07_rounded_a17_in_between_count_fraction', '>f8'), ('t07_rounded_a17_in_between_debiased', '>f8'), ('t07_rounded_a17_in_between_weight', '>f8'), ('t07_rounded_a17_in_between_weight_fraction', '>f8'), ('t07_rounded_a18_cigar_shaped_count', '>f8'), ('t07_rounded_a18_cigar_shaped_count_fraction', '>f8'), ('t07_rounded_a18_cigar_shaped_debiased', '>f8'), ('t07_rounded_a18_cigar_shaped_weight', '>f8'), ('t07_rounded_a18_cigar_shaped_weight_fraction', '>f8'), ('t07_rounded_count', '>f8'), ('t07_rounded_weight', '>f8'), ('t09_bulge_shape_a25_rounded_count', '>f8'), ('t09_bulge_shape_a25_rounded_count_fraction', '>f8'), ('t09_bulge_shape_a25_rounded_debiased', '>f8'), ('t09_bulge_shape_a25_rounded_weight', '>f8'), ('t09_bulge_shape_a25_rounded_weight_fraction', '>f8'), ('t09_bulge_shape_a26_boxy_count', '>f8'), ('t09_bulge_shape_a26_boxy_count_fraction', '>f8'), ('t09_bulge_shape_a26_boxy_debiased', '>f8'), ('t09_bulge_shape_a26_boxy_weight', '>f8'), ('t09_bulge_shape_a26_boxy_weight_fraction', '>f8'), ('t09_bulge_shape_a27_no_bulge_count', '>f8'), ('t09_bulge_shape_a27_no_bulge_count_fraction', '>f8'), ('t09_bulge_shape_a27_no_bulge_debiased', '>f8'), ('t09_bulge_shape_a27_no_bulge_weight', '>f8'), ('t09_bulge_shape_a27_no_bulge_weight_fraction', '>f8'), ('t09_bulge_shape_count', '>f8'), ('t09_bulge_shape_weight', '>f8'), ('t10_arms_winding_a28_tight_count', '>f8'), ('t10_arms_winding_a28_tight_count_fraction', '>f8'), ('t10_arms_winding_a28_tight_debiased', '>f8'), ('t10_arms_winding_a28_tight_weight', '>f8'), ('t10_arms_winding_a28_tight_weight_fraction', '>f8'), ('t10_arms_winding_a29_medium_count', '>f8'), ('t10_arms_winding_a29_medium_count_fraction', '>f8'), ('t10_arms_winding_a29_medium_debiased', '>f8'), ('t10_arms_winding_a29_medium_weight', '>f8'), ('t10_arms_winding_a29_medium_weight_fraction', '>f8'), ('t10_arms_winding_a30_loose_count', '>f8'), ('t10_arms_winding_a30_loose_count_fraction', '>f8'), ('t10_arms_winding_a30_loose_debiased', '>f8'), ('t10_arms_winding_a30_loose_weight', '>f8'), ('t10_arms_winding_a30_loose_weight_fraction', '>f8'), ('t10_arms_winding_count', '>f8'), ('t10_arms_winding_weight', '>f8'), ('t11_arms_number_a31_1_count', '>f8'), ('t11_arms_number_a31_1_count_fraction', '>f8'), ('t11_arms_number_a31_1_debiased', '>f8'), ('t11_arms_number_a31_1_weight', '>f8'), ('t11_arms_number_a31_1_weight_fraction', '>f8'), ('t11_arms_number_a32_2_count', '>f8'), ('t11_arms_number_a32_2_count_fraction', '>f8'), ('t11_arms_number_a32_2_debiased', '>f8'), ('t11_arms_number_a32_2_weight', '>f8'), ('t11_arms_number_a32_2_weight_fraction', '>f8'), ('t11_arms_number_a33_3_count', '>f8'), ('t11_arms_number_a33_3_count_fraction', '>f8'), ('t11_arms_number_a33_3_debiased', '>f8'), ('t11_arms_number_a33_3_weight', '>f8'), ('t11_arms_number_a33_3_weight_fraction', '>f8'), ('t11_arms_number_a34_4_count', '>f8'), ('t11_arms_number_a34_4_count_fraction', '>f8'), ('t11_arms_number_a34_4_debiased', '>f8'), ('t11_arms_number_a34_4_weight', '>f8'), ('t11_arms_number_a34_4_weight_fraction', '>f8'), ('t11_arms_number_a36_more_than_4_count', '>f8'), ('t11_arms_number_a36_more_than_4_count_fraction', '>f8'), ('t11_arms_number_a36_more_than_4_debiased', '>f8'), ('t11_arms_number_a36_more_than_4_weight', '>f8'), ('t11_arms_number_a36_more_than_4_weight_fraction', '>f8'), ('t11_arms_number_a37_cant_tell_count', '>f8'), ('t11_arms_number_a37_cant_tell_count_fraction', '>f8'), ('t11_arms_number_a37_cant_tell_debiased', '>f8'), ('t11_arms_number_a37_cant_tell_weight', '>f8'), ('t11_arms_number_a37_cant_tell_weight_fraction', '>f8'), ('t11_arms_number_count', '>f8'), ('t11_arms_number_weight', '>f8')]))

Each VAC is different and thus may return entirely different data structures, depending on how that VAC was integrated into Marvin. It may return e.g. a single number, dict, class instance, or FITS record. VAC integrations can be arbitrarily simple or complex. Note also that not all VACs will be available for every MaNGA release, and not all targets will have VAC information available. Please see the list of Available VACs for details on what each VAC returns.

For example, the MaNGA-HI VAC also provides ancillary spectral data for individual targets. Thus it returns a more complicated object with access to additional data and methods. That VAC returns a custom VACTarget class that includes a method for plotting spectra in addition to returning the HI data for the target.

>>> from import Cube
>>> cube = Cube('7443-12701')
>>> # return an instance of HITarget
>>> hi = cube.vacs.mangahi
>>> print(hi)

>>> # Access the HI data for target 7443-12701
>>> print(
    FITS_rec([('7443-12701', '12-98126', 230.5074624, 43.53234133, 6139, '16A-14', 767.4, 1.76, 8.82, -999., -999., -999., -999., -999, -999., -999, -999, -999, -999, -999, -999., -999., -999., -999., -999., -999.)],
    dtype=(numpy.record, [('plateifu', 'S10'), ('mangaid', 'S9'), ('objra', '>f8'), ('objdec', '>f8'), ('vopt', '>i2'), ('session', 'S12'), ('Exp', '>f4'), ('rms', '>f4'), ('logHIlim200kms', '>f4'), ('peak', '>f4'), ('snr', '>f4'), ('FHI', '>f4'), ('logMHI', '>f4'), ('VHI', '>i2'), ('eV', '>f4'), ('WM50', '>i2'), ('WP50', '>i2'), ('WP20', '>i2'), ('W2P50', '>i2'), ('WF50', '>i2'), ('Pr', '>f4'), ('Pl', '>f4'), ('ar', '>f4'), ('br', '>f4'), ('al', '>f4'), ('bl', '>f4')]))

>>> # plot the HI spectrum for 7443-12701
>>> hi.plot_spectrum()

Full Catalog VAC Access

To access the entirety of each available VAC catalogs, use the VACs Tool.

>>> from import VACs
>>> v = VACs()
>>> print(v)
    <VACs (firefly, galaxyzoo, gema, HI)>

This tool returns access to the underlying catalog data for each VAC with an available summary FITS file. The data attribute contains the full HDUList of the VAC. info prints file information. When the data attribute is first accessed, it will check for local file existence and download the file if necessary.

>>> # access the complete Galaxy Zoo VAC catalogs
>>> gz = v.galaxyzoo
>>> print(gz)
    <GalaxyzooData(description=Returns Galaxy Zoo morphology, n_hdus=2)>

>>> # access the data
    [< object at 0x2c95f10b8>, < object at 0x2c83a6e10>]

To create an Astropy Table representation of a VAC data extension, use get_table method.

# get an Astropy table for extension 1
gz = v.galaxyzoo
table = gz.get_table(ext=1)

To check if a VAC has a given target, use the has_target and pass in a plateifu or mangaid designation.

# check if a VAC has a target

Alternatively, you can check all VACs for a given target with check_target. This returns a dictionary of booleans indicating whether or not the given target is included in that VAC.

>>> v.check_target('1-209232')
    {'firefly': True, 'galaxyzoo': True, 'gema': True, 'HI': False}

Some VACs may also provide custom convenience methods attached to their VAC object. For example, the MaNGA-HI VAC provides a method that plots the HI mass fraction for its targets, using info from the MaNGA drpAll file.

# access the MaNGA HI VAC
hi = v.HI

# plot the HI mass fraction of targets



A mixin that provides access to NSA paremeters.

A mixin that provides access to DAPall paremeters.

Available VACS


Provides access to the MaNGA-HI VAC.


Provides access to the MaNGA Galaxy Zoo Morphology VAC.


Provides access to the MaNGA-GEMA VAC.


Provides access to the MaNGA-FIREFLY VAC.