J/AJ/161/256ivo://CDS.VizieR/J/AJ/161/256doi:10.26093/cds/vizier.51610256CDSKsoll V.F.Gouliermis D.Sabbi E.Ryon J.E.Robberto M.Gennaro M.,Klessen R.S.Koethe U.De Marchi G.Chen C.-H.R.Cignoni M.,Dolphin A.E.2025-02-12T20:07:43Z2024-10-10T13:11:04ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frhst-photometrymagellanic-cloudsstar-forming-regionssurveysvisible-astronomyIn order to better understand the role of high-mass stellar feedback in regulating star formation in giant molecular clouds, we carried out a Hubble Space Telescope (HST) Treasury Program Measuring Young Stars in Space and Time (MYSST) targeting the star-forming complex N44 in the Large Magellanic Cloud (LMC). Using the F555W and F814W broadband filters of both the ACS and WFC3/UVIS, we built a photometric catalog of 461684 stars down to m_F555W_~29mag and m_F814W_~28mag, corresponding to the magnitude of an unreddened 1Myr pre-main-sequence star of ~0.09M_{sun}_ at the LMC distance. In this first paper we describe the observing strategy of MYSST and the data reduction procedure and present the photometric catalog. We identify multiple young stellar populations tracing the gaseous rim of N44's superbubble, together with various contaminants belonging to the LMC field population. We also determine the reddening properties from the slope of the elongated red clump (RC) feature by applying the machine-learning algorithm RANSAC, and we select a set of upper-main-sequence stars as primary probes to build an extinction map, deriving a relatively modest median extinction A_F555W_~0.77mag. The same procedure applied to the RC provides A_F555W_~0.68 mag.2021AJ....161..256Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/256CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/452/210 : UBV photometry in LH 47/48 (Oey+ 1995)J/AcA/49/223 : BVI photometry of OGLE LMC Cepheids (Udalski+, 1999)J/AcA/49/437 : BVI photometry of OGLE SMC Cepheids (Udalski+, 1999)J/AJ/128/1606 : Magellanic Clouds Photometric Survey: the LMC (Zaritsky+, 2004)J/ApJ/695/511 : Young massive stars in LHA 120-N 44 (Chen+, 2009)J/A+A/530/A115 : Rotating massive MS stars evolutionary models (Brott+, 2011)J/ApJ/738/137 : HST VI stars in Shapley Constellation III (Gouliermis+, 2011)J/ApJS/197/16 : CO observations of LMC molecular clouds (MAGMA). (Wong+, 2011)J/A+A/542/A66 : YSOs in 9 LMC star forming regions (Carlson+, 2012)J/ApJ/755/154 : Mass accretion rates from HST in the ONC (Manara+, 2012)J/A+A/553/A24 : Models for rotating stars (Georgy+, 2013)J/ApJS/207/10 : HST Treasury Program on the ONC (Robberto+, 2013)J/ApJS/222/11 : Hubble Tarantula Treasury Project (HTTP). III. (Sabbi+, 2016)J/MNRAS/472/1760 : Hierarchical formation of Westerlund 1 (Gennaro+, 2017)J/ApJ/854/154 : N159 ^12^CO and ^13^CO (2-1) clumps (Nayak+, 2018)J/MNRAS/476/1213 : Ages for stars in 19 clusters (Getman+, 2018)http://archive.stsci.edu/hlsp/mysst : MYSST data on MASThttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/256https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/256http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/256https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/256https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/256http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/256GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/256/catalog (MYSST photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/256/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/256/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/256/catalog?GETtext/xml+votable180.050000true80.3513336-67.93911740.0055555555555555565/8275 6/2.238682544986967e-19 4.293000657289493e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/256?format=asciiOpticaldefaultJ/AJ/161/256/catalogMYSST photometric catalogType[1] DOLPHOT object type (always "1" = bright star)meta.code.classintF555Wmag[13.94/29.31] HST/WFC3 F555W band magnitudemagphot.mag;em.opt.Vfloate_F555Wmag[0.001/0.22] Uncertainty in F555Wmagmagstat.error;phot.mag;em.opt.VfloatChi2F555[0.3/204] {chi}^2^ PSF fit quality for F555Wmeta.code.qual;instr.det.psf;meta.modelledfloatSNR555[4.9/1871] Signal-to-noise ratio for F555Wstat.snrfloatshrp555[-0.7/0.3] Sharpness for F555Wstat.fit.paramfloatrnd555[-1.12/9.16] Roundness for F555Wstat.fit.paramfloatcrwd555[0/0.25] Crowding for F555Wmagstat.fit.paramfloatq_F555Wmag[0/3] Photometry quality flag for F555Wmag (0=good) (1)meta.code.qual;phot.mag;em.opt.VintF814Wmag[13.02/28.2] HST/WFC3 F814W band magnitudemagphot.mag;em.opt.Ifloate_F814Wmag[0.001/0.22] Uncertainty on the F814Wmagmagstat.error;phot.mag;em.opt.IfloatChi2F814[0.1/219] {chi}^2^ PSF fit quality for F814Wmeta.code.qual;instr.det.psf;meta.modelledfloatSNR814[5/2171] Signal-to-noise ratio for F814Wstat.snrfloatshrp814[-0.7/0.3] Sharpness for F814Wstat.fit.paramfloatrnd814[-1.85/9.62] Roundness for F814Wstat.fit.paramfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMYSSTMYSST identifier (HHMMSS.ss+DDMMSS.ss; J2000)meta.id;meta.maincharcrwd814[0/0.25] Crowding for F814Wmagstat.fit.paramfloatq_F814Wmag[0/3] Photometry quality flag for F814Wmag (0=good) (1)meta.code.qual;phot.mag;em.opt.IintOrgn[0/4] Photometry origin flag (2)meta.codeintXpos[87/28804] Pixel coordinate X in WFC3/UVIS reference imagepixpos.cartesian.x;posdoubleYpos[213/26257] Pixel coordinate Y in WFC3/UVIS reference imagepixpos.cartesian.y;posdoubleRAJ2000[80.3/81.2] Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-68.2/-67.8] Declination (J2000)degpos.eq.dec;meta.mainindexedChi2[0.5/19.3] Chi squared PSF fit quality for combined datastat.fit.chi2;instr.det.psf;meta.modelledfloatSNR[4/4358] S/N for combined datastat.snrfloatshrp[-0.74/0.34] Sharpness for combined datastat.fit.paramfloatrnd[0/10] Roundness for combined datastat.fit.paramfloatmjaxdir[0/175] Direction of major axis (if not round) for combined datadegphys.angSizeintcrwd[0/2.8] Crowding for combined datastat.fit.paramfloat