J/MNRAS/452/2087    Galaxy And Mass Assembly (GAMA): DR2     (Liske+, 2015)

Galaxy And Mass Assembly (GAMA): end of survey report and data release 2. Liske J., Baldry I.K., Driver S.P., Tuffs R.J., Alpaslan M., Andrae E., Brough S., Cluver M.E., Grootes M.W., Gunawardhana M.L.P., Kelvin L.S., Loveday J., Robotham A.S.G., Taylor E.N., Bamford S.P., Bland-Hawthorn J., Brown M.J.I., Drinkwater M., Hopkins A.M., Meyer M.J., Norberg P., Peacock J.A., Agius N.K., Andrews S.K., Bauer A.E., Ching J.H.Y., Colless M., Conselice C.J., Croom S.M., Davies L.J.M., De Propris R., Dunne L., Eardley E.M., Ellis S., Foster C., Frenk C.S., Haussler B., Holwerda B.W., Howlett C., Ibarra H., Jarvis M.J., Jones D.H., Kafle P.R., Lacey C.G., Lange R., Lara-Lopez M.A., Lopez-Sanchez A.R., Maddox S., Madore B.F., Mcnaught-Roberts T., Moffett A.J., Nichol R.C., Owers M.S., Palamara D., Penny S.J., Phillipps S., Pimbblet K.A., Popescu C.C., Prescott M., Proctor R., Sadler E.M., Sansom A.E., Seibert M., Sharp R., Sutherland W., Vazquez-Mata J.A., Van Kampen E., Wilkins S.M., Williams R., Wright A.H. <Mon. Not. R. Astron. Soc., 452, 2087-2126 (2015)> =2015MNRAS.452.2087L 2015MNRAS.452.2087L (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxy catalogs ; Redshifts ; Photometry, SDSS ; Photometry, infrared Keywords: surveys; galaxies: distances and redshifts galaxies: fundamental parameters; galaxies: general galaxies: photometry; galaxies: statistics Abstract: The Galaxy And Mass Assembly (GAMA) survey is one of the largest contemporary spectroscopic surveys of low redshift galaxies. Covering an area of ∼286deg2 (split among five survey regions) down to a limiting magnitude of r<19.8mag, we have collected spectra and reliable redshifts for 238000 objects using the AAOmega spectrograph on the Anglo-Australian Telescope. In addition, we have assembled imaging data from a number of independent surveys in order to generate photometry spanning the wavelength range 1nm-1m. Here, we report on the recently completed spectroscopic survey and present a series of diagnostics to assess its final state and the quality of the redshift data. We also describe a number of survey aspects and procedures, or updates thereof, including changes to the input catalogue, redshifting and re-redshifting, and the derivation of ultraviolet, optical and near-infrared photometry. Finally, we present the second public release of GAMA data. In this release, we provide input catalogue and targeting information, spectra, redshifts, ultraviolet, optical and near-infrared photometry, single-component Sersic fits, stellar masses, Hα-derived star formation rates, environment information, and group properties for all galaxies with r<19.0mag in two of our survey regions, and for all galaxies with r<19.4mag in a third region (72225 objects in total). The data base serving these data is available at http://www.gama-survey.org/. Description: Following the first three years of survey operations (2008 February-2010 May; see Driver et al. 2011MNRAS.413..971D 2011MNRAS.413..971D, Cat. J/MNRAS/413/971) the GAMA spectroscopic survey on the AAT was substantially expanded, resulting in a number of significant changes to the GAMA IC and target selection. Here (and in other GAMA publications), the term 'GAMA I' refers to the data collected during these first three years, and to all data products that can be traced back to the original version of the IC (called InputCatAv05). In contrast, the term 'GAMA II' refers to the entire GAMA data set, including all GAMA I and all subsequently collected data, and all data products that can be traced back to the revised version of the IC (InputCatAv06 for the equatorial survey regions). File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file inputcat.dat 276 960510 SDSS DR6 data of GAMA I survey regions. GAMA's master input catalogue (InputCatA V05) tiling.dat 246 169850 Science targets and information for tiling and spectroscopic observation (InputCatA V16) -------------------------------------------------------------------------------- See also: J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011) http://www.gama-survey.org : GAMA Home Page Byte-by-byte Description of file: inputcat.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- CataID Unique GAMA ID of object (CATAID) 8- 25 I18 --- objID SDSS objid (OBJID) 27- 35 F9.5 deg RAdeg Right ascension (J2000) (RA) 37- 45 F9.5 deg DEdeg Declination (J2000) (DEC) 47- 65 I19 --- Flags Flags (SDSS photoobj table) (FLAGS) 67- 75 I9 --- PTarget Primary target (SDSS photoobj table) (PRIMTARGET) 77- 86 F10.6 arcsec Prad Petrosian radius (PETRORAD_R) 88- 95 F8.5 mag rmagPSF PSF r magnitude (PSFMAG_R) 97-107 F11.5 mag rmagFib ?=-9999 3-arcsec fiber r magnitude (FIBERMAG_R) 109-127 I19 --- Flagsr r flags (SDSS photoobj table) (FLAGS_R) 129-136 F8.6 mag rext r-band Galactic extinction (EXTINCTION_R) 138-148 F11.5 arcsec Prad90 ?=-9999 Radius containing 90% of Petrosian flux (PETROR90_R) 150-160 F11.5 arcsec Prad50 ?=-9999 Radius containing 50% of Petrosian flux (PETROR50_R) 162-169 F8.5 mag uPmag SDSS DR6 Petrosian u magnitude (PETROMAG_U) 171-178 F8.5 mag gPmag SDSS DR6 Petrosian g magnitude (PETROMAG_G) 180-187 F8.5 mag rPmag SDSS DR6 Petrosian r magnitude (PETROMAG_R) 189-199 F11.5 mag iPmag ?=-9999 SDSS DR6 Petrosian i magnitude (PETROMAG_I) 201-208 F8.5 mag zPmag SDSS DR6 Petrosian z magnitude (PETROMAG_Z) 210-220 F11.5 mag uMmag ?=-9999 SDSS DR6 model u magnitude (MODELMAG_U) 222-232 F11.5 mag gMmag ?=-9999 SDSS DR6 model g magnitude (MODELMAG_G) 234-241 F8.5 mag rMmag SDSS DR6 model r magnitude (MODELMAG_R) 243-253 F11.5 mag iMmag ?=-9999 SDSS DR6 model i magnitude (MODELMAG_I) 255-265 F11.5 mag zMmag ?=-9999 SDSS DR6 model z magnitude (MODELMAG_Z) 267-271 I5 --- Status Status (SDSS photoobj table) (STATUS) 273-276 I4 --- Run SDSS run number (RUN) -------------------------------------------------------------------------------- Byte-by-byte Description of file: tiling.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- CataID Unique GAMA ID of object (CATAID) 8- 25 I18 --- objID SDSS objid (OBJID) 27- 35 F9.5 deg RAdeg Right ascension (J2000) (RA) 37- 45 F9.5 deg DEdeg Declination (J2000) (DEC) 47- 53 F7.4 mag rmagFib 3-arcsec fiber r magnitude (FIBERMAG_R) 55- 61 F7.4 mag rPmag Extinction-corrected SDSS DR6 Petrosian magnitude (R_PETRO) 63- 73 F11.5 mag uMmag ?=-9999 Extinction-corrected SDSS DR6 u magnitude (U_MODEL) 75- 85 F11.5 mag gMmag ?=-9999 Extinction-corrected SDSS DR6 g magnitude (G_MODEL) 87- 93 F7.4 mag rMmag Extinction-corrected SDSS DR6 r magnitude (R_MODEL) 95-101 F7.4 mag iMmag Extinction-corrected SDSS DR6 i magnitude (I_MODEL) 103-110 F8.5 mag zMmag Extinction-corrected SDSS DR6 z magnitude (Z_MODEL) 112-113 I2 --- SCode Survey code for redshift source (SURVEY_CODE) (1) 115-123 F9.6 --- z ?=-9.99999 Spectroscopic redshift (Z) 125 I1 --- NQ Quality of redshift (NQ) 127-159 A33 --- SpecId ID of spectrum from SpecAll table (SPECID) 161 I1 --- NGamaSpec Number of GAMA spectra matched to object (NUMGAMASPEC) 163-169 F7.4 mag/arcsec+2 SuBrR SDSS Petro half-light surface brightness (R_SB) 171-179 F9.6 mag SG-sepr rpsf-rmodel star-galaxy separation parameter (SG_SEP) 181-189 F9.6 mag SG-SepJK ?=-9.99 J-K-f_locus star-galaxy separation parameter (SGSEPJK) 191-199 F9.5 mag Kmag ?=-9.99 Extinction-corrected r-defined auto AB K magnitude (K_AUTO) 201-203 I3 --- TFlag Bitwise target criteria (TARGET_FLAGS) (2) 205 I1 --- SClass Useful for selecting samples (SURVEY_CLASS) (3) 207 I1 --- PClass Priorities for targeting (PRIORITY_CLASS) (4) 209-210 I2 --- NClass Number of priority_class≥8 targets within 40 arcsec (NEIGHBOUR_CLASS) 212-219 F8.6 --- MasK10 Mask value 0.0 to 1.0 around V<10 stars (MASKIC10) (5) 221-228 F8.6 --- Mask12 Mask value 0.0 to 1.0 around V<12 stars (MASKIC12) (5) 230-232 I3 --- VClass Visual classification (VIS_CLASS) (6) 234-244 A11 --- n_VClass Initials of classifiers, xxx for none (VISCLASSUSER) 246 I1 --- DR2Flag [0,1] Indicates whether spectra, redshifts and ancillary data for this object are released in DR2 (DR2_FLAG) -------------------------------------------------------------------------------- Note (1): Survey code for source of redshift as follows: 1 = SDSS 2 = 2dFGRS 3 = MGC 4 = 2SLAQ-LRG 5 = GAMA 6 = 6dFGS 7 = UZC 8 = 2QZ 9 = 2SLAQ-QSO 10 = NED 11 = GAMA_LT 12 = WiggleZ Note (2): Target flag (t) (showing which target criteria are satisfied) (bitwise set of flags, bit X): ------------------------------------ X t=2^X meaning ------------------------------------ 0 1 SDSS main galaxy sample 1 2 SDSS LRG sample 2 4 r<19.0 and rpsf-rmodel>0.25 (high priority in Year 1) 3 8 r<19.4 (G09,G15) or r<19.8 (G12) 4 16 r<19.8 5 32 z_model<18.2 6 64 K_AB<17.6 7 128 (g_model<20.6 or r_model<19.8 or i_model<19.4) (G12) 8 256 radio_flux>0.0 Note (3): Survey class (sc) as follows: sc = 0: not a target (except for checks on vis_class=3) sc = 1: target only because of radio selection (F1 not (MS or F2 or F3)) sc ≥ 2: passes star-galaxy separation criteria (MS, F2 or F3) sc ≥ 3: r<19.8 or zK-selected (MS, F2) (uniform selection in all regions) sc ≥ 4: *** MS *** sc ≥ 5: MS r or z-selected sc ≥ 6: *** MS r-selected only *** sc ≥ 7: r<19.0 and sg_sep>0.25 (Year 1 high priority targets) See the IC paper for details on the selection. 'MS' means main survey: main survey = (r<19.4 (G09,G15) or r<19.8 (G12) or K_AB<17.6 or z_model<18.2) Note (4): Priority Class (p): p > 1 except p=2,4,7 satisfy survey_class ≥ 3; p > 1 satisfy fiber mag limits 16.8 < r_fib < 22.8; p > 1 expect p=7 satisfy vis_class≤1 or vis_class=255. Note (5): These parameters encode the bright star mask. The bright star mask is based on stars in the Tycho 2, Tycho 1 and Hipparcos catalogues. For each bright star, a scattered-light radius (R_s) was estimated based on the circular region over which the star flux per pixel is greater than five times the sky noise level. For each object in TilingCat Mask10 (MASKIC10) is defined as follows: d ≤ R_s : MASKIC10 = 1 R_s < d ≤ 5*R_s : MASKIC10 = R_s / d d > 5*R_s : MASKIC10 = 0 where d is the distance between the object and the nearest V < 10 mag star, which has scattered light radius R_s. In other words, the MASKIC10 value decreases from unity when d ≤ R_s to 0.2 when d = 5*R_s, and then jumps to 0 when d > 5*R_s. MASKIC12 is defined in the same way for V < 12 mag stars. In addition, objects within an SDSS database mask for holes, satellite trails or bleeding pixels had these mask values set to unity. p=9: Q≤2 and numgamaspec = 0 (target but never attempted) p=8: Q≤2 and numgamaspec = 1 (only one failed GAMA observation) p=7: Q≤2 and vis_class=3 (would be a target other than vis_class) p=6: Q=3 and numgamaspec ≤1 (to check the Q=3 redshift blunder rate) p=5: Q≤2 and numgamaspec ≥2 (two or more failed GAMA observations) p=4: Q≤2 other targets (sc=1 or sc=2) p=2: Q ≥ 3 other targets (sc=1 or sc=2 done) p=0: all others including: vis_class=2-4 objects, fibre bright or fibre faint Note (6): Visual classification as follows: 0 = not eyeballed 1 = yes a target 2 = not a target (no evidence of galaxy light) 3 = not a target (not the main part of a galaxy) 4 = compromised photometry (selection mag has serious error) 255 = not eyeballed but the following flags are *all* zero EDGE, BLENDED, CHILD, MAYBE_CR, MAYBE_EGHOST -------------------------------------------------------------------------------- History: Copied at http://www.gama-survey.org
(End) Patricia Vannier [CDS] 15-Feb-2016
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