J/A+A/713/A237ivo://CDS.VizieR/J/A+A/713/A237CDSBelli S.Bugiani L.Park M.Mendel J.T.Davies R.L.Khoram A.H.,Johnson B.D.Leja J.Tacchella S.Brown V.Conroy C.Emami R.Li Y.,Liboni C.Maheson G.Mathews E.P.Naidu R.P.Nelson E.J.,Terrazas B.A.Weinberger R.2026-09-18T09:02:49Z2026-09-18T09:44:47ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesspectroscopycatalogsredshiftedastrometrystellar-massesphotometryWe present the Blue Jay survey, a Cycle-1 JWST program aimed at studying the stellar and gas content of galaxies at Cosmic Noon. The survey consists of deep spectroscopy for 153 targets observed over two pointings in the COSMOS field using the NIRSpec micro-shutter assembly (MSA). We employ the three medium-resolution gratings G140M, G235M, and G395M, with exposure times of 13 hours, 3.2 hours, and 1.6 hours, respectively. We thus obtain full coverage of the 1-5 {mu}m range, corresponding to the entire rest-frame optical wavelength range, with a spectral resolution R~1000. Parallel observations provide deep, multi-band NIRCam imaging, which partially overlaps with the spectroscopic observations. The sample is carefully selected to provide a census of galaxies over the redshift range 1.7<z<3.5 above a redshift-dependent minimum stellar mass that ranges from 10^8.7^M_{sun}_ to 10^9.3^M_{sun}_. The selection ensures that the Blue Jay sample is representative of the entire galaxy population at these redshifts, without strong biases in color, star formation rate, or other properties. The sizes of massive galaxies at these redshifts are comparable to, or larger than the NIRSpec shutters, which requires custom strategies for designing and reducing the observations. Since the standard A-B nod subtraction leads to flux self-subtraction for large galaxies, we construct a master background from empty shutters and subtract it from each of the science spectra. This, in turn, allows for the use of shorter slitlets consisting of only two shutters per galaxy instead of the usual three, with a substantial increase in the multiplexing of the NIRSpec MSA. Another problem introduced by the small shutter size is the mismatch between the galaxy region probed by NIRSpec and that probed by photometric measurements. For this reason, we measure multi-band photometry using archival JWST and Hubble Space Telescope observations in two different ways: source photometry is measured in a large elliptical aperture encompassing the entire source, while box photometry is measured from the exact area in the sky where the NIRSpec 1D spectrum is extracted. This enables self-consistent fits of spectroscopic and photometric data. The Blue Jay dataset, which we publicly release, represents the ideal sample for studying the stellar populations, neutral gas, and ionized gas in Cosmic Noon galaxies, including star formation histories, quenching, outflows, metallicity, and dust attenuation.2026A&A...713A.237Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/713/A237CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/691/A240 : ASTRODEEP-JWST photometry and redshifts (Merlin+, 2024)J/A+A/556/A55 : Multi-color photometry of star-forming galaxiesJ/MNRAS/492/821 : The KLEVER Survey: metallicity maps and gradientsJ/MNRAS/490/417 : VANDELS massive quiescent galaxies at 1.0<z<1.3J/ApJ/946/L16 : CEERS Key Paper. IV. JWST & HST data (Perez-Gonzalez+, 2023)J/ApJ/795/165 : Line ratios in z~2-3 galaxies from KBSS-MOSFIREJ/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)J/ApJ/771/85 : Dynamical masses of z~2 quiescent galaxiesJ/ApJ/706/1364 : SINS survey of high-redshift galaxiesJ/ApJS/270/12 : The UNCOVER SPS cat. for robust sources up to z~15J/ApJS/225/27 : 3D-HST Survey: grism spectra master catalog (Momcheva+, 2016)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/713/A237https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/713/A237http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/713/A237https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/713/A237https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/713/A237http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/713/A237GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/713/A237/bluejay (Astrometrics, redshifts and stellar properties of the Blue Jay galaxy survey observed in Cycle-1 JWST program (Table 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/713/A237/bluejay?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/713/A237/bluejay?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/713/A237/bluejay?GETtext/xml+votable180.050000true150.089833892.250410.0055555555555555566/27258https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/713/A237?format=asciiInfrareddefaultJ/A+A/713/A237/bluejayAstrometrics, redshifts and stellar properties of the Blue Jay galaxy survey observed in Cycle-1 JWST program (Table 4)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID from the 3D-HST catalog for COSMOS field v4.1.5 of Skelton et al. 2014ApJS..214...24S, Cat. J/ApJS/214/24 (id)meta.id;meta.mainintRAJ2000Right ascension measured (J2000) (ra) (1)degpos.eq.ra;meta.mainDEJ2000Declination measured from HST F160W (J2000) (dec) (1)degpos.eq.dec;meta.mainF160WmagAB magnitude in F160W, from the 3D-HST catalog (mag_F160W)magphot.flux.density;em.IR.HfloatWeightSpectroscopic weight used for MSA planning configuration as seen in spectroscopic weights section (weight)stat.weightintlogMStellar mass from Prospector emulator (emul_lmass)log(solMass)phys.massfloatzphPhotometric redshift from Prospector emulator (emul_zred)src.redshiftfloatzsp? Spectroscopic redshift from NIRSpec data (z_spec)src.redshiftfloatnullableSNRG140MSNR ratio in the G140M NIRSpec grating (SNR_140)stat.snr;arith.ratiofloatSNRG235MSNR ratio in the G235M NIRSpec grating (SNR_235)stat.snr;arith.ratiofloatSNRG395MSNR ratio in the G395M NIRSpec grating (SNR_395)stat.snr;arith.ratiofloatFileNameName of the spectrum in subdirectory spmeta.idcharspSpectrum from NIRspec observationsmeta.ref.urlchar