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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 492 1574 MUSE UDF Survey (UDF10 + Mosaic) redshift catalog udf10.dat 442 313 MUSE UDF Survey (UDF10) redshift catalog mosaic.dat 453 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- 16 F11.8 deg RAdeg Right ascension (J2000) (RA) (G2) 18- 29 F12.8 deg DEdeg Declination (J2000) (DEC) (G2) 31 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 33- 51 A19 --- UVUDF UVUDF object designation (UVUDF_ID) 53- 56 I4 --- UDF10 ?=-99 ORIGIN UDF10 identification number (ORIGIDUDF10) 58- 68 F11.8 deg RAUdeg ? ORIGIN UDF10 right ascension (J2000) (ORIGRAUDF10) 70- 81 F12.8 deg DEUdeg ? ORIGIN UDF10 declination (J2000) (ORIGDECUDF10) 83- 86 I4 --- MOSAIC ?=-99 ORIGIN MOSAIC identification number (ORIGIDMOSAIC) 88- 98 F11.8 deg RAMdeg ? ORIGIN MOSAIC right ascension (J2000) (ORIGRAMOSAIC) 100-111 F12.8 deg DEMdeg ? ORIGIN MOSAIC declination (J2000) (ORIGDECMOSAIC) 113-121 A9 --- MLET MUSELET designation (MLET_ID) (G3) 123-133 F11.8 deg RALdeg ? MUSELET right ascension (J2000) (MLET_RA) 135-146 F12.8 deg DELdeg ? MUSELET declination (J2000) (MLET_DEC) 148 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart) (EML_ONLY) 150-166 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 168-176 F9.6 --- zMuse Spectroscopic redshift determined with MUSE (Z_MUSE) 178 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 180 A1 --- Type [0-7] Type of feature used to identified zMuse (TYPE) (G9) 182 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 184-190 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 192-197 F6.4 mag e_F775W [0/1[? rms uncertainty on F775W (F775WMAGERR) 199-210 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 212-223 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR) 225-236 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 238-249 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 251-262 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 264-275 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 277-288 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 290-301 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 303-314 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 316-327 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 329-340 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 342-353 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 355-366 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 368-379 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on FOIII1 (OIII4959FLUXERR) 381-392 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 394-405 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 407-418 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 420-431 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 433-444 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 446-457 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 459-470 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 472-483 E12.7 10-23W/m2 e_FLya ? rms uncertainty on FLya (LYALPHAFLUXERR) 485-490 A6 --- r_zMuse Redshift origin (Mosaic or UDF10) (Z_FROM) 492 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- 16 F11.8 deg RAdeg Right ascension (J2000) (RA) (G2) 18- 29 F12.8 deg DEdeg Declination (J2000) (DEC) (G2) 31 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 33- 48 A16 --- UVUDF UVUDF designation (UVUDF_ID) 50- 53 I4 --- UDF10 ?=-99 ORIGIN identification number (ORIG_ID) 55- 65 F11.8 deg RAUdeg ? ORIGIN right ascension (J2000) (ORIG_RA) 67- 78 F12.8 deg DEUdeg ? ORIGIN declination (J2000) (ORIG_DEC) 80 A1 --- MLET [ ] MLET designation (MLET_ID) (not used) 82- 92 F11.8 deg RALdeg ?=- MLET RA (J2000) (MLET_RA) (not used) 94-105 F12.8 deg DELdeg ?=- MLET DE (J2000) (MLET_RA) (not used) 107 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart)(EML_ONLY) 109-125 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 127-135 F9.6 --- zMuse Spectroscopic redshift determined with MUSE (Z_MUSE) 137 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 139 I1 --- Type [1/6] Type of feature used to identified zMuse (TYPE) (G9) 141 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 143-149 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 151-156 F6.4 mag e_F775W [0/1[? rms uncertainty on F775W (F775WMAGERR) 158-169 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 171-182 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR 184-195 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 197-208 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 210-221 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 223-234 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 236-247 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 249-260 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 262-273 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 275-286 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 288-299 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 301-312 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 314-325 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 327-338 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on OIII4959FLUXERR) (OIII4959FLUXERR) 340-351 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 353-364 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 366-377 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 379-390 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 392-403 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 405-416 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 418-429 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 431-442 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- 16 F11.8 deg RAdeg Right ascension (J2000) (RA) (G2) 18- 29 F12.8 deg DEdeg Declination (J2000) (DEC) (G2) 31 A1 --- Merged [0,1] Merged flag (1=yes) (MERGED) (G7) 33- 51 A19 --- UVUDF UVUDF designation (UVUDF_ID) 53- 56 I4 --- MOSAIC ?=-99 ORIGIN identification number (ORIG_ID) 58- 68 F11.8 deg RAMdeg ? ORIGIN right ascension (J2000) (ORIG_RA) 70- 81 F12.8 deg DEMdeg ? ORIGIN declination (J2000) (ORIG_DEC) 83- 91 A9 --- MLET MUSELET designation (MLET_ID) (G3) 93-103 F11.8 deg RALdeg ? MUSELET right ascension (J2000) (MLET_RA) 105-116 F12.8 deg DELdeg ? MUSELET declination (J2000) (MLET_DEC) 118 A1 --- EML-ONLY [0,1] Flag for the objects detected only by ORIGIN or MUSELET (i.e., no UVUDF counterpart) (EML_ONLY) 120-136 A17 --- REF-SPEC The main spectrum (PSF-weighted or MUSE white-light weighted) used to measure redshift (REF_SPEC) 138-146 F9.6 --- zMuse Spectroscopic redshift determined with MUSE(Z_MUSE) 148 I1 --- Confid [1/3] Confidence level of zMuse (CONFID) (G8) 150 A1 --- Type [0-7] Type of feature used to identified zMuse (TYPE) (G9) 152 A1 --- Defect [0/1] Flag defect in the data (DEFECT) (G4) 154-160 F7.4 mag F775W ? HST F775W magnitude (AB) (F775W_MAG) (G5) 162-167 F6.4 mag e_F775W [0/1]? rms uncertainty on F775W (F775WMAGERR) 169-180 E12.7 10-23W/m2 FHa ? Hα flux (HALPHA_FLUX) (G6) 182-193 E12.7 10-23W/m2 e_FHa ? rms uncertainty on FHa (HALPHAFLUXERR) 195-206 E12.7 10-23W/m2 FHb ? Hβ flux (HBETA_FLUX) (G6) 208-219 E12.7 10-23W/m2 e_FHb ? rms uncertainty on FHb (HBETAFLUXERR) 221-232 E12.7 10-23W/m2 FHg ? Hγ flux (HGAMMA_FLUX) (G6) 234-245 E12.7 10-23W/m2 e_FHg ? rms uncertainty on FHg (HGAMMAFLUXERR) 247-258 E12.7 10-23W/m2 FHd ? Hδ flux (HDELTA_FLUX) (G6) 260-271 E12.7 10-23W/m2 e_FHd ? rms uncertainty on FHd (HDELTAFLUXERR) 273-284 E12.7 10-23W/m2 FOII1 ? OII (3726) flux (OII3726_FLUX) (G6) 286-297 E12.7 10-23W/m2 e_FOII1 ? rms uncertainty on FOII1 (OII3726FLUXERR) 299-310 E12.7 10-23W/m2 FOII2 ? OII (3729) flux (OII3729_FLUX) (G6) 312-323 E12.7 10-23W/m2 e_FOII2 ? rms uncertainty on FOII2 (OII3729FLUXERR) 325-336 E12.7 10-23W/m2 FOIII1 ? OIII (4959) flux (OIII4959_FLUX) (G6) 338-349 E12.7 10-23W/m2 e_FOIII1 ? rms uncertainty on FOIII1 (OIII4959FLUXERR) 351-362 E12.7 10-23W/m2 FOIII2 ? OIII (5007) flux (OIII5007_FLUX) (G6) 364-375 E12.7 10-23W/m2 e_FOIII2 ? rms uncertainty on FOIII2 (OIII5007FLUXERR) 377-388 E12.7 10-23W/m2 FCIII1 ? CIII (1907) flux (CIII1907_FLUX) (G6) 390-401 E12.7 10-23W/m2 e_FCIII1 ? rms uncertainty on FCIII1 (CIII1907FLUXERR) 403-414 E12.7 10-23W/m2 FCIII2 ? CIII (1909) flux (CIII1909_FLUX) (G6) 416-427 E12.7 10-23W/m2 e_FCIII2 ? rms uncertainty on FCIII2 (CIII1909FLUXERR) 429-440 E12.7 10-23W/m2 FLya ? Lyman α flux (LYALPHA_FLUX) (G6) 442-453 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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