Need help downloading emline maps

[CptnN3MO]

although not a bug, forgive me for that, but mailing sdsshelpdesk gave no results.

I need to download the emline gflux maps for a galaxy that is available on the Marvin webtool (galaxy is 8250-6101), but in the fits format. these maps

but the download option is only regular images

I did try the get maps option from the webtool and using python, but it only gave me this

please advise me on what to do

[havok2063]

Hi @CptnN3MO on the Marvin web page for a given galaxy, you can click the "Download" dropdown button in the top panel. From the list of items, click the "Default MAPS" option. This will download the FITS file. Or you can use the marvin python package to access the MAPS objects. See https://sdss-marvin.readthedocs.io/en/stable/.

If you need to download the MAPS files in bulk, for a bunch of galaxies, you should use the sdss_access software package. See https://sdss-access.readthedocs.io/en/stable/index.html.

Also see the DAP MAPS entry here for more information on the file, https://www.sdss.org/dr17/manga/manga-data/data-model/#DataAnalysisPipelineOutput

[CptnN3MO]

hello brian, I did use the Download > Default MAPS, option, but as i mentioned in the Post, it returned me with this weird file when I open with SAO-DS9 (attached). I don't quite understand that image.

thank you, siddarth

On Tue, Dec 13, 2022 at 10:28 PM Brian Cherinka @.***> wrote:

Hi @CptnN3MO https://github.com/CptnN3MO on the Marvin web page for a given galaxy, you can click the "Download" dropdown button in the top panel. From the list of items, click the "Default MAPS" option. This will download the FITS file. Or you can use the marvin python package to access the MAPS objects. See https://sdss-marvin.readthedocs.io/en/stable/ .

If you need to download the MAPS files in bulk, for a bunch of galaxies, you should use the sdss_access software package. See https://sdss-access.readthedocs.io/en/stable/index.html.

Also see the DAP MAPS entry here for more information on the file, https://www.sdss.org/dr17/manga/manga-data/data-model/#DataAnalysisPipelineOutput

— Reply to this email directly, view it on GitHub https://github.com/sdss/marvin/issues/792#issuecomment-1349062592, or unsubscribe https://github.com/notifications/unsubscribe-auth/A4DTICHQE474CFOPHTDK74DWNCTJXANCNFSM6AAAAAAS5DIVQ4 . You are receiving this because you were mentioned.Message ID: @.***>

[havok2063]

@CptnN3MO Please see the datamodel description for the structure of the MAPS files. https://www.sdss.org/dr17/manga/manga-data/data-model/#DataAnalysisPipelineOutput and https://data.sdss.org/datamodel/files/MANGA_SPECTRO_ANALYSIS/DRPVER/DAPVER/DAPTYPE/PLATE/IFU/manga-MAPS-DAPTYPE.html.

I think by default DS9 loads the first extension of a multi-extension FITS file. If you want to display the emission line maps in DS9, you will need to explicitly load that extension and sub-channel. You should refer to their documentation for that.