search

moustakas / SGA

Code and papers for the Siena Galaxy Atlas (SGA-2020).
MIT License
10 stars 2 forks source link

mistakes in SGA-2020 #56

Closed djschlegel closed 1 year ago

djschlegel commented 2 years ago

This ticket can track galaxies in SGA-2020 used for DR9 that should be re-fit with different starting parameters:

https://www.legacysurvey.org/viewer?ra=55.11&dec=-28.68&layer=ls-dr9&zoom=14&sga

moustakas commented 2 years ago

PGC1168221: https://www.legacysurvey.org/viewer/?ra=139.0055415&dec=0.5240977&zoom=15&layer=ls-dr9&sga

moustakas commented 2 years ago

SDSSJ222743.82+070833.3 is Galactic cirrus https://www.legacysurvey.org/viewer/?ra=336.9326010&dec=7.1425921&zoom=10&layer=ls-dr9&sga

So is SDSSJ222743.82+070833.3 https://www.legacysurvey.org/viewer/?ra=336.9326010&dec=7.1425921&zoom=15&layer=ls-dr9&sga&sga-parent#PGC2203059

moustakas commented 1 year ago

IC3049 group has a contaminating star: https://www.legacysurvey.org/viewer?ra=183.3900&dec=14.4808&layer=ls-dr9&zoom=15&sga

Snell1185 commented 1 year ago

PGC170565 is likely a foreground star. https://sga.legacysurvey.org/group/PGC170565?index=1685 https://www.legacysurvey.org/viewer/?ra=1.208628&dec=-40.9016209&zoom=15&layer=ls-dr9&sga

moustakas commented 1 year ago

Additional related tickets:

moustakas commented 1 year ago

UM461 is split into two; the secondary (SDSS) source is a compact HII region in this low-metallicity galaxy--https://www.legacysurvey.org/viewer?ra=177.8879&dec=-2.3733&layer=ls-dr10&zoom=16&sga

UGCA20 might be the HII region, but regardless the parent galaxy is missing https://www.legacysurvey.org/viewer?ra=25.8187&dec=19.9655&layer=ls-dr9&zoom=14&sga-parent&sga

Missing PGC061664 - merger + star: https://www.legacysurvey.org/viewer?ra=274.0390&dec=42.6564&layer=ls-dr9&zoom=14&sga-parent&sga

PGC002634 - missing merger / companion: https://www.legacysurvey.org/viewer?ra=11.0808&dec=-17.3580&layer=ls-dr9&zoom=14&sga-parent&sga

PGC1049719 - size impacted by star https://www.legacysurvey.org//viewer/?ra=149.7777&dec=-5.0718&layer=ls-dr9&zoom=14&sga

PGC2106849 - probably should not have been part of IC4182_GROUP https://www.legacysurvey.org/viewer-desi?ra=196.4636&dec=37.6669&layer=ls-dr9&zoom=13&sga-parent&sga

moustakas commented 1 year ago

ESO201-10 appears to be a globular cluster or something else (but not a galaxy)-- https://www.legacysurvey.org/viewer/?ra=58.7621&dec=-49.6149&layer=ls-dr9&zoom=14&sga&sga-parent https://ned.ipac.caltech.edu/byname?objname=ESO201-10&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1

Confirmed to be a GC by Alex Drlica-Wagner:

This one is known as Arp-Madore 1 (AM1) or E1.  It is one of the most distant globular clusters (120 kpc), 
has a pretty large half-light radius (~15pc), and I'm not sure if it has a measured velocity dispersion 
(there isn't one listed in the Harris GC cluster catalog, but imagine someone must have measured it).
moustakas commented 1 year ago

NGC7592 + missing companion https://www.legacysurvey.org/viewer-desi/?ra=349.5926&dec=-4.4163&layer=ls-dr9&zoom=15&sga&sga-parent

moustakas commented 1 year ago

NGC0547 - crowded cluster field; SGA is totally wrong on one of the giant galaxies https://www.legacysurvey.org/viewer-desi/?ra=21.5026&dec=-1.3447&layer=ls-dr9&zoom=14&sga&sga-parent

moustakas commented 1 year ago

PGC087438 is a crowded cluster that's not handled correctly-- https://www.legacysurvey.org/viewer-desi/?ra=55.1092&dec=-28.6770&layer=ls-dr9&zoom=15&sga&sga-parent

moustakas commented 1 year ago

Missing PGC033116 companion-- https://www.legacysurvey.org/viewer-desi/?ra=164.9373&dec=17.6497&layer=ls-dr9&zoom=15&sga&sga-parent

moustakas commented 1 year ago

NGC0007 - incomplete grz coverage https://www.legacysurvey.org/viewer-desi/?ra=2.0977&dec=-29.9167&layer=ls-dr9&zoom=13&sga-parent&sga

moustakas commented 1 year ago

Some additional missing systems based on a comparison with Hecate:

moustakas commented 1 year ago

The central coordinates for NGC4395 (https://www.legacysurvey.org/viewer-dev/?ra=186.455993&dec=33.546294&layer=ls-dr9&zoom=15&sga&sga-parent), NGC0247 (https://www.legacysurvey.org/viewer-dev/?ra=11.783689&dec=-20.758056&layer=ls-dr9&zoom=15&sga&sga-parent#NGC%20247), and NGC4565 (https://www.legacysurvey.org/viewer-dev/?ra=189.0864&dec=25.9874&layer=ls-dr9&zoom=14&sga&sga-parent), three large, famous galaxies, are incorrect. Bummer. There are probably more...

Also, the NGC4395 minor axis length is too small.

Snell1185 commented 1 year ago

PGC060073 should not exist https://www.legacysurvey.org/viewer?ra=259.8425&dec=49.0338&layer=ls-dr10-grz&zoom=16&sga-parent&sga

Snell1185 commented 1 year ago

PGC033423 missing the companion https://www.legacysurvey.org/viewer?ra=165.9745&dec=40.8500&layer=ls-dr10-grz&zoom=15&sga-parent&sga

Snell1185 commented 1 year ago

https://github.com/moustakas/SGA/issues/56#issuecomment-1587155935 reply

Other examples include: NGC0598 NGC3031 NGC4258 NGC4826

These should follow the central artifact is the right position center

moustakas commented 1 year ago

The residual masking is too aggressive in some spheroidals, leading to a loss of light in the outer envelopes. A couple examples: https://sga.legacysurvey.org/group/UGC07124?index=2 https://sga.legacysurvey.org/group/IC0941?index=4

moustakas commented 1 year ago

I'm closing this ticket in favor of several new, more finely grained tickets:

@Snell1185 thank you for your contributions, which we continue to welcome!

Snell1185 commented 1 year ago

PGC213712 is star

Migrated to 51