MWP1BUBBLE ivo://nasa.heasarc/mwp1bubble NASA/GSFC HEASARC Simpson et al. 2026-05-29 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Nebula This table contains a new catalog of 5106 infrared bubbles created through visual classification via the online citizen science website 'The Milky Way Project' (MWP). Bubbles in the new catalog have been independently measured by at least five individuals, producing consensus parameters for their positions, radii, thicknesses, eccentricities and position angles. Citizen scientists - volunteers recruited online and taking part in this research - have independently rediscovered the locations of at least 86% of three widely used catalogs of bubbles and H II regions while finding an order of magnitude more objects. 29% of the bubbles in the Milky Way Project catalog lie on the rim of a larger bubble, or have smaller bubbles located within them, opening up the possibility of better statistical studies of triggered star formation. This online resource of the <a href="https://www.zooniverse.org/projects/povich/milky-way-project">Milky Way Project</a> provides a crowd-sourced map of bubbles and arcs in the Milky Way, and will enable better statistical analysis of Galactic star formation sites. This table is the first data release of the MWP IR Bubble Catalog: the authors anticipate a future release of a second, refined catalog incorporating better data-reduction techniques. This table was created by the HEASARC in March 2013 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/424/2442">CDS Catalog J/MNRAS/424/2442</a> files mwplarge.dat and mwpsmall.dat. This is a service provided by NASA HEASARC . 2012MNRAS.424.2442S https://heasarc.gsfc.nasa.gov/W3Browse/all/mwp1bubble.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=mwp1bubble& GET text/xml 180 99999 true 193.43174395 -63.7556239 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=mwp1bubble GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_mwp1bubble&Action=More+Options&Action=Parameter+Search&ConeAdd=1 NEBULA CATALOG 0.0833333333333333 X-ray public mwp1bubble Milky Way Project First Data Release IR Bubble Catalog name Catalog Identification, MWP1 GLLL.lll+BB.bbb or MWP1 GLLL.ll+BB.bbS meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable effective_radius Effective Radius arcmin phys.angSize double nullable effective_thickness Effective Thickness arcmin phys.angSize double nullable eccentricity Eccentricity of Ellipse src.orbital.eccentricity double nullable position_dispersion Dispersion on Position arcmin stat.error;pos double nullable bubble_type String Indicates Large or Small Type meta.code;src.morph char nullable bii Galactic Latitude degree pos.galactic.lat double nullable lii Galactic Longitude degree pos.galactic.lon double nullable position_angle Position Angle (from Vertical of Y Axis) degree pos.posAng short nullable hit_rate Hit Rate meta.code double nullable hierarchy_flags Hierarchy Flags meta.code char nullable alt_names Other Designations(s) (Churchwell IDs) meta.id char nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable