data.galaxyzoo.orgGalaxy Zoo Data

Galaxy Zoo Full Catalog AGN Host Galaxies Overlapping Galaxy Pairs Mergers Green Peas Red Spirals Galaxy Zoo 2 Full Catalog Bar Lengths Dust-Lane Spheroidal Galaxies Galaxy Zoo: Hubble Full Catalog Bar Fraction Evolution Galaxy Zoo: CANDELS Full Catalog Galaxy Zoo: Mergers Galaxy Builder Data Visualizations Galaxy Zoo 1 data release The original Galaxy Zoo project ran from July 2007 until February 2009. It was replaced by Galaxy Zoo 2 , Galaxy Zoo: Hubble , and Galaxy Zoo: CANDELS . In the original Galaxy Zoo project, volunteers classified images of Sloan Digital Sky Survey galaxies as belonging to one of six categories - elliptical, clockwise spiral, anticlockwise spiral, edge-on , star/don't know, or merger. Full catalog This webpage allows anyone to download the resulting GZ classifications of nearly 900,000 galaxies in the project. Galaxy Zoo is described in Lintott et al. 2008, MNRAS, 389, 1179 and the data release is described in Lintott et al. 2011, 410, 166 . Anyone making use of the data should cite at least one of these papers in any resulting publications. Table 2 This table gives classifications of galaxies which have spectra included in SDSS Data Release 7. The fraction of the vote in each of the six categories is given, along with debiased votes in elliptical and spiral categories and flags identifying systems as classified as spiral, elliptical or uncertain. CSV (gzipped) GalaxyZoo1_DR_table2.csv.gz CSV (zip) GalaxyZoo1_DR_table2.csv.zip FITS GalaxyZoo1_DR_table2.fits VOTable GalaxyZoo1_DR_table2.vot.gz Note: the provided flags in Table 2 are there for the convenience of users who do not want to get into the details too much. These are based upon a vote fraction threshold of 0.8. However, there is a complication in the debiasing (described in Bamford et al. 2009 ). The classification bias depends on whether one uses the type likelihoods directly, or applies a threshold. The bias is worse if thresholds are used. We therefore applied bias corrections computed in consistent fashion. So, for the debiased type likelihoods we computed the bias correction based on the elliptical/spiral ratio using the likelihoods directly; for the type flags we debiased the raw type likelihoods using a correction based on the elliptical/spiral ratio determined after applying a 0.8 threshold, and then applied the same threshold to produce the flags. Therefore, the type flags do not correspond to simply applying a 0.8 threshold on the debiased type likelihoods, though for many galaxies these will agree. Table 3 This table gives classifications of galaxies included in the Galaxy Zoo sample which did not have spectra available in SDSS Data Release 7. It is not possible to estimate the bias in this sample without accurate redshifts, and so only the fraction of the vote in each of the six categories is given. CSV (gzipped) GalaxyZoo1_DR_table3.csv.gz CSV (zip) GalaxyZoo1_DR_table3.csv.zip FITS GalaxyZoo1_DR_table3.fits VOTable GalaxyZoo1_DR_table3.vot.gz Table 4 This table gives a series of measures of the classification confidence. CSV (gzipped) GalaxyZoo1_DR_table4.csv.gz CSV (zip) GalaxyZoo1_DR_table4.csv.zip FITS GalaxyZoo1_DR_table4.fits VOTable GalaxyZoo1_DR_table4.vot.gz Table 5 This table gives the results from the bias study that introduced mirrored images. CSV (gzipped) GalaxyZoo1_DR_table5.csv.gz CSV (zip) GalaxyZoo1_DR_table5.csv.zip FITS GalaxyZoo1_DR_table5.fits VOTable GalaxyZoo1_DR_table5.vot.gz Table 6 This table gives the results from the bias study that introduced monochrome images. CSV (gzipped) GalaxyZoo1_DR_table6.csv.gz CSV (zip) GalaxyZoo1_DR_table6.csv.zip FITS GalaxyZoo1_DR_table6.fits VOTable GalaxyZoo1_DR_table6.vot.gz Table 7 This table gives the fraction of votes in each of the six categories, combining results from the main and bias studies. CSV (gzipped) GalaxyZoo1_DR_table7.csv.gz CSV (zip) GalaxyZoo1_DR_table7.csv.zip FITS GalaxyZoo1_DR_table7.fits VOTable GalaxyZoo1_DR_table7.vot.gz CASjobs These tables are also accessible via CasJobs . Their names are: Table 2: DR10.zooSpec Table 3: DR10.zooNoSpec Table 4: DR10.zooConfidence Table 5: DR10.zooMirrorBias Table 6: DR10.zooMonochrome Table 7: DR10.zooVotes AGN host galaxies This sample is presented in the Galaxy Zoo 1 paper on AGN host galaxies ( Schawinski et al., 2010, ApJ, 711, 284 ). It is a volume-limited sample of galaxies (0.02 < z < 0.05, M z < –19.5 AB) with emission line classifications, stellar masses, velocity dispersions and GZ1 morphological classifications. When using this sample, please cite Schawinski et al. ( 2010 ) and Lintott et al. ( 2008 , 2011 ). Download here: schawinski_GZ_2010_catalogue.fits.gz OBJID SDSS DR7 object ID RA, DEC RA and dec in J2000.0 REDSHIFT spectroscopic redshift from SDSS GZ1_MORPHOLOGY Galaxy Zoo 1 morphology according to the Land et al. (2008) "clean" criterion. This is an integer where 0 = indeterminate, 1 = early type, 3 = merger, 4 = late type BPT_CLASS Spectroscopic classification of galaxy based on emission lines ratios in the BPT diagram. 0 = no emission lines, 1 = star-forming, 2 = composite, 3 = Seyfert and 4 = LINER. U,G,R,I,Z SDSS model magnitudes. These are extinction-corrected but not k -corrected. SIGMA, SIGMA_ERR Stellar velocity dispersion (and error) measured using GANDALF LOG_MSTELLAR log of stellar mass [M_sun] L_O3 Extinction-corrected [OIII] luminosity Overlapping Galaxy Pairs This section contains data from the Galaxy Zoo survey for overlapping galaxy pairs, useful for studies of dust absorption. Data is derived from the Zoo 1 and Zoo 2 periods (August 2007–April 2010), and is described in detail by Keel et al. (PASP, 2013, 125, 923) . The catalog contains a total of 1990 galaxy pairs. Overlapping galaxy pairs Column description and format TXT overlapcatalog.txt Javascript Overlap candidates (sortable webpage) There is a similar file of candidate pairs which were rejected for the final list because of evidence for interaction, other geometric reasons, or for having redshifts the wrong way around for dust backlighting. Rejected overlapping galaxy pairs PDF OverlapRejects.pdf Javascript Overlap rejects (sortable webpage) The various overlapping galaxy pair types are illustrated in Figures 2a and 2b from Keel et al. 2013. Below are PDF files containing a single page for each galaxy pair, plus finding charts, more detailed photometry and identifications, and in some cases more precise redshifts. The PDFs are also available at http://astronomy.ua.edu/keel/observe/PDFcharts . SDSSOverlaps00Final.pdf RA: 00–10 hours SDSSOverlaps10final.pdf RA: 10–13 hours SDSSOverlaps13final.pdf RA: 13–15 hours SDSSOverlaps15final.pdf RA: 15–24 hours Merging galaxies This sample of merging galaxies is assembled from SDSS Galaxy Zoo 1 data. It is a homogenous sample of galaxies (0.005 < z < 0.1) with spectroscopy for at least one of two merging galaxies in the pair. Value-added GZ data includes the morphologies of the merging galaxies as well as the relative stage of the merger. For any use of data from this sample, please cite Darg et al. (2010a) and Darg et al. (2010b) . Merging galaxies Column description and format CSV darg_mergers.csv FITS darg_mergers.fits Green peas "Green peas" are compact galaxies with extremely high star-formation rates. Their name comes from their appearance in colour SDSS images, which is due to strong [OIII] λ5007 emission that appears in the r -band filter for large numbers of low-redshift (0.112 < z < 0.360) galaxies. Properties of the initial sample are described in Cardamone et al. (2009) . Data below is from Table 4 in Cardamone et al. (2009). Green pea galaxies Column description and format CSV peas_tbl14.csv FITS peas_tbl14.fits Red Spirals "Red Spirals" are galaxies with clearly identified spiral structure which are optically red in colour. Most spiral galaxies are blue in colour, while most ellipticals are red, so this sample of red spirals is an interesting intermediate population...