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J/A+A/608/A2        MUSE Hubble Ultra Deep Field Survey. II.      (Inami+, 2017)

The MUSE Hubble Ultra Deep Field Survey: II. Spectroscopic redshifts and comparisons to color selections of high redshift galaxies. Inami H., Bacon R., Brinchmann J., Richard J., Contini T., Conseil S., Hamer S., Akhlaghi M., Bouche N., Clement B., Desprez G., Drake A.B., Hashimoto T., Leclercq F., Maseda M., Michel-Dansac L., Paalvast M., Tresse L., Ventou E., Kollatschny W., Boogaard L.A., Finley H., Marino R.A., Schaye J., Wisotzki L. <Astron. Astrophys. 608, A2 (2017)> =2017A&A...608A...2I (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs - Redshifts - Galaxies, optical Keywords: galaxies: high-redshift - galaxies: formation - galaxies: evolution - catalogs - surveys Abstract: We have conducted a two-layered spectroscopic survey (1'x1' ultra deep and 3'x3'deep regions) in the Hubble Ultra Deep Field (HUDF) with the Multi Unit Spectroscopic Explorer (MUSE). The combination of a large field of view, high sensitivity, and wide wavelength coverage provides an order of magnitude improvement in spectroscopically confirmed redshifts in the HUDF; i.e., 1206 secure spectroscopic redshifts for Hubble Space Telescope (HST) continuum selected objects, which corresponds to 15% of the total (7904). The redshift distribution extends well beyond z>3 and to HST/F775W magnitudes as faint as ~=30mag (AB, 1σ). In addition, 132 secure redshifts were obtained for sources with no HST counterparts that were discovered in the MUSE data cubes by a blind search for emission-line features. In total, we present 1338 high quality redshifts, which is a factor of eight increase compared with the previously known spectroscopic redshifts in the same field. We assessed redshifts mainly with the spectral features [OII] at z<1.5 (473 objects) and Lyα at 2.9<z<6.7 (692 objects). With respect to F775W magnitude, a 50% completeness is reached at 26.5mag for ultra deep and 25.5mag for deep fields, and the completeness remains ≥20% up to 28-29mag and ~=27mag, respectively. We used the determined redshifts to test continuum color selection (dropout) diagrams of high-z galaxies. The selection condition for F336W dropouts successfully captures ~=80% of the targeted z∼2.7 galaxies. However, for higher redshift selections (F435W, F606W, and F775W dropouts), the success rates decrease to ~=20-40%. We empirically redefine the selection boundaries to make an attempt to improve them to ~=60%. The revised boundaries allow bluer colors that capture Lyα emitters with high Lyα equivalent widths falling in the broadbands used for the color-color selection. Along with this paper, we release the redshift and line flux catalog. Description: Spectroscopic redshift measurements of the MUSE Hubble Ultra Deep Field Survey. File udf10. fit and mosaic.fit contain MUSE spectroscopic redshifts in the ultra-deep and deep fields, respectively. File combined.fit are the combined catalog of udf10.fit and mosaic.fit whose duplicates are removed because the two fields are overlapping. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file combined.dat 460 1574 MUSE UDF Survey (UDF10 + Mosaic) redshift catalog udf10.dat 418 313 MUSE UDF Survey (UDF10) redshift catalog mosaic.dat 429 1439 MUSE UDF Survey (Mosaic) redshift catalog
See also: J/AJ/150/31 : Photometry and redshifts of galaxies in UDF (Rafelski+, 2015) J/A+A/608/A8 : MUSE Hubble Ultra Deep Field Survey. VIII (Leclercq+, 2017) Byte-by-byte Description of file: combined.dat
Bytes Format Units Label Explanations
1- 4 I4 --- MUSE MUSE object identification number (MUSE_ID) (G1) 6- 12 F7.4 deg RAdeg Right ascension (J2000) (RA) (G2) 14- 21 F8.4 deg DEdeg Declination (J2000) (DEC) (G2) 23 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 25- 43 A19 --- UVUDF UVUDF object designation (UVUDF_ID) 45- 48 I4 --- UDF10 ?=-99 Original UDF10 identification number (ORIGIDUDF10) 50- 56 F7.4 deg RAUdeg ? Original UDF10 right ascension (J2000) (ORIGRAUDF10) 58- 65 F8.4 deg DEUdeg ? Original UDF10 declination (J2000) (ORIGDECUDF10) 67- 70 I4 --- MOSAIC ?=-99 Original MOSAIC identification number (ORIGIDMOSAIC) 72- 78 F7.4 deg RAMdeg ? Original MOSAIC right ascension (J2000) (ORIGRAMOSAIC) 80- 87 F8.4 deg DEMdeg ? Original MOSAIC declination (J2000) (ORIGDECMOSAIC) 89- 97 A9 --- MLET MUSELET designation (MLET_ID) (G3) 99-105 F7.4 deg RALdeg ? MUSELET right ascension (J2000) (MLET_RA) 107-114 F8.4 deg DELdeg ? MUSELET declination (J2000) (MLET_DEC) 116 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart) (EML_ONLY) 118-134 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 136-144 F9.6 --- zMuse Spectroscopic redshift determined with MUSE (Z_MUSE) 146 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 148 A1 --- Type [0/7] Type of feature used to identified zMuse (TYPE) (G9) 150 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 152-158 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 160-165 F6.4 mag e_F775W [0/1[? rms uncertainty on F775W (F775WMAGERR) 167-178 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 180-191 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR) 193-204 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 206-217 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 219-230 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 232-243 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 245-256 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 258-269 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 271-282 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 284-295 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 297-308 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 310-321 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 323-334 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 336-347 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on FOIII1 (OIII4959FLUXERR) 349-360 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 362-373 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 375-386 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 388-399 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 401-412 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 414-425 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 427-438 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 440-451 E12.7 10-23W/m2 e_FLya ? rms uncertainty on FLya (LYALPHAFLUXERR) 453-458 A6 --- r_zMuse Redshift origin (Mosaic or UDF10) (Z_FROM) 460 I1 --- IN-UDF10 [0,1] In UDF10? (IN_UDF10)
Byte-by-byte Description of file: udf10.dat
Bytes Format Units Label Explanations
1- 4 I4 --- MUSE MUSE object identification number (MUSE_ID) (G1) 6- 12 F7.4 deg RAdeg Right ascension (J2000) (RA) (G2) 14- 21 F8.4 deg DEdeg Declination (J2000) (DEC) (G2) 23 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 25- 40 A16 --- UVUDF UVUDF designation (UVUDF_ID) 42- 45 I4 --- UDF10 ?=-99 Original identification number (ORIG_ID) 47- 53 F7.4 deg RAUdeg ? Original right ascension (J2000) (ORIG_RA) 55- 62 F8.4 deg DEUdeg ? Original declination (J2000) (ORIG_DEC) 64 A1 --- MLET [ ] MLET designation (MLET_ID) (not used) 66- 72 F7.4 deg RALdeg ?=- MLET RA (J2000) (MLET_RA) (not used) 74- 81 F8.4 deg DELdeg ?=- MLET DE (J2000) (MLET_RA) (not used) 83 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart)(EML_ONLY) 85-101 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 103-111 F9.6 --- zMuse Spectroscopic redshift determined with MUSE (Z_MUSE) 113 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 115 A1 --- Type [1/6] Type of feature used to identified zMuse (TYPE) (G9) 117 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 119-125 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 127-132 F6.4 mag e_F775W [0/1[? rms uncertainty on F775W (F775WMAGERR) 134-145 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 147-158 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR 160-171 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 173-184 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 186-197 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 199-210 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 212-223 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 225-236 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 238-249 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 251-262 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 264-275 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 277-288 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 290-301 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 303-314 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on OIII4959FLUXERR) (OIII4959FLUXERR) 316-327 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 329-340 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 342-353 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 355-366 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 368-379 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 381-392 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 394-405 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 407-418 E12.7 10-23W/m2 e_FLya ? rms uncertainty on FLya (LYALPHAFLUXERR)
Byte-by-byte Description of file: mosaic.dat
Bytes Format Units Label Explanations
1- 4 I4 --- MUSE MUSE identification number (MUSE_ID) (G1) 6- 12 F7.4 deg RAdeg Right ascension (J2000) (RA) (G2) 14- 21 F8.4 deg DEdeg Declination (J2000) (DEC) (G2) 23 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 25- 43 A19 --- UVUDF UVUDF designation (UVUDF_ID) 45- 48 I4 --- MOSAIC ?=-99 Original identification number (ORIG_ID) 50- 56 F7.4 deg RAMdeg ? Original right ascension (J2000) (ORIG_RA) 58- 65 F8.4 deg DEMdeg ? Original declination (J2000) (ORIG_DEC) 67- 75 A9 --- MLET MUSELET designation (MLET_ID) (G3) 77- 83 F7.4 deg RALdeg ? MUSELET right ascension (J2000) (MLET_RA) 85- 92 F8.4 deg DELdeg ? MUSELET declination (J2000) (MLET_DEC) 94 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart) (EML_ONLY) 96-112 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 114-122 F9.6 --- zMuse Spectroscopic redshift determined with MUSE(Z_MUSE) 124 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 126 A1 --- Type [0/7] Type of feature used to identified zMuse (TYPE) (G9) 128 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 130-136 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 138-143 F6.4 mag e_F775W [0/1]? rms uncertainty on F775W (F775WMAGERR) 145-156 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 158-169 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR) 171-182 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 184-195 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 197-208 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 210-221 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 223-234 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 236-247 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 249-260 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 262-273 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 275-286 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 288-299 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 301-312 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 314-325 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on FOIII1 (OIII4959FLUXERR) 327-338 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 340-351 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 353-364 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 366-377 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 379-390 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 392-403 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 405-416 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 418-429 E12.7 10-23W/m2 e_FLya ? rms uncertainty on FLya (LYALPHAFLUXERR)
Global notes: Note (G1): For the future release, if an object can be "split" into multiple objects in terms of their redshift identifications, then the original MUSE_ID will be deleted and the new IDs of the split objects will be added to the catalog. Note (G2): When Merged = 1, the coordinates are calculated as HST F775W flux weighted coordinates of all objects composing the new merged source (see Sect. 3.1.1). Otherwise, they are identical to the UVUDF catalog (Rafelski et al. 2015, Cat. J/AJ/150/31). Note (G3): Emission line search with MUSELET is only performed in the mosaic Note (G4): Flag defect in the data as follows: 0 = no defect 1 = some issues with the data Note (G5): from Rafelski et al. (2015Cat. J/AJ/150/31) (when Merged = 1, this value is not provided) or NoiseChisel (when e_F775W =-1, F775W is a 3σ upper limit. Note (G6): Line fluxes (10-20erg/s/cm2) summed over the entire mask aperture. The measurements are only provided when S/N>3. Note (G7): Merged flag as follows: 0 = no 1 = yes Note (G8): Confidence level at follows: 3 = secure redshift, determined by multiple features; 2 = secure redshift, determined by a single feature; 1 = possible redshift, determined by a single feature whose spectral identification remains uncertain. Note (G9): Type as follows: 0 = star 1 = nearby emission line object 2 = [OII] emitter 3 = absorption line galaxy 4 = CIII] emitter 5 = [OIII] emitter 6 = Lyα emitter 7 = other types
Acknowledgements: Hanae Inami, hanae.inai(at)univ-lyon1.fr References: Bacon et al., Paper I 2017A&A...608A...1B Brinchmann et al., Paper III 2017A&A...608A...3B Maseda et al., Paper IV 2017A&A...608A...4M Guerou et al., Paper V 2017A&A...608A...5G Drake et al., Paper VI 2017A&A...608A...6D Finley et al., Paper VII 2017A&A...608A...7F Leclercq et al., Paper VIII 2017A&A...608A...8L, Cat. J/A+a/608/A8 Ventou et al., Paper IX 2017A&A...608A...9V Hashimoto et al., Paper X 2017A&A...608A..10H
(End) Patricia Vannier [CDS] 29-Aug-2017
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