J/A+A/530/A86ivo://CDS.VizieR/J/A+A/530/A86doi:10.26093/cds/vizier.35300086CDSKuemmel M.Rosati P.Fosbury R.Haase J.Hook R.N.Kuntschner H.,Lombardi M.Micol A.Nilsson K.K.Stoehr F.Walsh J.R.2017-09-19T14:21:02Z2011-11-01T16:35:16ZCDS support team

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

cds-question@unistra.frsurveysspectroscopyA public release of slitless spectra, obtained with ACS/WFC and the G800L grism, is presented. Spectra were automatically extracted in a uniform way from 153 archival fields (or "associations") distributed across the two Galactic caps, covering all observations to 2008. The ACS G800L grism provides a wavelength range of 0.55-1.00um, with a dispersion of 40{AA}/pixel and a resolution of ~80{AA} for point-like sources. The ACS G800L images and matched direct images were reduced with an automatic pipeline that handles all steps from archive retrieval, alignment and astrometric calibration, direct image combination, catalogue generation, spectral extraction and collection of metadata. The large number of extracted spectra (73,581) demanded automatic methods for quality control and an automated classification algorithm was trained on the visual inspection of several thousand spectra. The final sample of quality controlled spectra includes 47919 datasets (65% of the total number of extracted spectra) for 32149 unique objects, with a median i_AB_-band magnitude of 23.7, reaching 26.5 AB for the faintest objects. Each released dataset contains science-ready 1D and 2D spectra, as well as multi-band image cutouts of corresponding sources and a useful preview page summarising the direct and slitless data, astrometric and photometric parameters. This release is part of the continuing effort to enhance the content of the Hubble Legacy Archive (HLA) with highly processed data products which significantly facilitate the scientific exploitation of the Hubble data. In order to characterize the slitless spectra, emission-line flux and equivalent width sensitivity of the ACS data were compared with public ground-based spectra in the GOODS-South field. An example list of emission line galaxies with two or more identified lines is also included, covering the redshift range 0.2-4.6. Almost all redshift determinations outside of the GOODS fields are new. The scope of science projects possible with the ACS slitless release data is large, from studies of Galactic stars to searches for high redshift galaxies.2011A&A...530A..86Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/530/A86CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/530/A86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/530/A86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/530/A86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/530/A86https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/530/A86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/530/A86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/530/A86/tablea1 (List of failed associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A86/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A86/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A86/tablea1?GETtext/xml+votable180.050000true345.639758.94072220.005555555555555556Cone search capability for table J/A+A/530/A86/tablea2 (Objects with determined redshifts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A86/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A86/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A86/tablea2?GETtext/xml+votable180.050000true36.83033-40.961450.005555555555555556Cone search capability for table J/A+A/530/A86/tablea3 (The associations included in this release)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/530/A86/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/530/A86/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/530/A86/tablea3?GETtext/xml+votable180.050000true34.7125417-4.79211110.0055555555555555566/669 2245 2623 4125 4448 4450 5284 5620 5639 5731 5975 6069 6254 6926 7309 7424 7878 8017 8116 8509 8767 9835 10578 11126 11230 11252 11626 11807 12644 17420 17690 18420 18601 18604 19283 19766 21434 22008 22825 23476 25302 26025 26303 27127 27415 27721 28221 28249 28344 28611 31417 32993 35180 35741 35763 35935 36287 36693 38382 43385 44542 46399 47102https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/530/A86?format=asciiOpticaldefaultJ/A+A/530/A86/tablea1List of failed associationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameAssociation (field) designationmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNgrismNumber of grism datasetsmeta.numberintNote[1/4] Reasons of exclusion (1)meta.noteintJ/A+A/530/A86/tablea2Objects with determined redshiftsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDisplay Association (field) data related to this object tablea2meta.ref.urlcharHLAHubble Legacy Archive object designation (JHHMMSS.ss+DDMMSS.s_AAAAAAAAA) (1)meta.id;meta.maincharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainz? Redshiftsrc.redshiftfloatnullablen_z[a-d] Discrepancies on z (2)meta.notechare_z? rms uncertainty on zstat.error;src.redshiftfloatnullableLinesLine identificationsmeta.id;spect.lineSimbadSimbad column added by the CDSmeta.refcharJ/A+A/530/A86/tablea3The associations included in this releaserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_NameSimbad column added by the CDSmeta.notecharNameAssociation designationmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainOrientOrientation of the y-axis in the detection imagedegpos.cartesian;instr.detfloatDateObservation datetime.epoch;obsnullableFiltHST filter namemeta.id;instr.filtercharNimgNumber of imagesmeta.numberintTimgExposure time for imagestime.duration;obs.exposurefloatNgr? Number of grism datasetsmeta.numberintnullableTgr? Exposure time for grismstime.duration;obs.exposurefloatnullableNobj? Number of objectsmeta.numberintnullableQual[0/2]? Image quality of detection image: 0=very good, 1=acceptable, 2=not optimal.meta.code.qual;instr.saturation;obs.imageintnullable