J/ApJ/883/175 First release of the MaNGA Stellar Library (MaStar) (Yan+, 2019) ================================================================================ SDSS-IV MaStar: a large and comprehensive empirical stellar spectral library -- First release. Yan R., Chen Y., Lazarz D., Bizyaev D., Maraston C., Stringfellow G.S., McCarthy K., Meneses-Goytia S., Law D.R., Thomas D., Barroso J.F., Sanchez- Gallego J.R., Schlafly E., Zheng Z., Argudo-Fernandez M., Beaton R.L., Beers T.C., Bershady M., Blanton M.R., Brownstein J., Bundy K., Chambers K.C., Cherinka B., De Lee N., Drory N., Galbany L., Holtzman J., Imig J., Kaiser N., Kinemuchi K., Liu C., Luo A.-L., Magnier E., Majewski S., Nair P., Oravetz A., Oravetz D., Pan K., Sobeck J., Stassun K., Talbot M., Tremonti C., Waters C., Weijmans A.-M., Wilhelm R., Zasowski G., Zhao G., Zhao Y.-H. =2019ApJ...883..175Y ================================================================================ ADC_Keywords: Galaxies, spectra; Surveys; Abundances; Photometry, ugriz; Radial velocities Keywords: catalogs ; Galaxy: stellar content ; stars: fundamental parameters ; stars: general ; techniques: spectroscopic Abstract: We present the first release of the MaNGA Stellar Library (MaStar), which is a large, well-calibrated, high-quality empirical library covering the wavelength range 3622-10354{AA} at a resolving power of R~1800. The spectra were obtained using the same instrument as used by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) project, by piggybacking on the Sloan Digital Sky Survey (SDSS-IV)/Apache Point Observatory Galaxy Evolution Experiment 2-N (APOGEE-2N) observations. Compared to previous empirical libraries, the MaStar library will have a higher number of stars and a more comprehensive stellar-parameter coverage, especially of cool dwarfs, low-metallicity stars, and stars with different [{alpha}/Fe], achieved by a sophisticated target-selection strategy that takes advantage of stellar-parameter catalogs from the literature. This empirical library will provide a new basis for stellar-population synthesis and is particularly well suited for stellar-population analysis of MaNGA galaxies. The first version of the library contains 8646 high-quality per-visit spectra for 3321 unique stars. Compared to photometry, the relative flux calibration of the library is accurate to 3.9% in g-r, 2.7% in r-i, and 2.2% in i-z. The data are released as part of SDSS Data Release 15. We expect the final release of the library to contain more than 10000 stars. Description: SDSS-IV has three major survey components: APOGEE-2, MaNGA, and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). APOGEE-2 is a medium-resolution infrared H-band spectroscopy survey of stars in the Milky Way (Majewski+ 2016AN....337..863M). It has a northern component executed with the 2.5m Sloan Foundation Telescope at Apache Point Observatory (APOGEE-2N), and a southern component executed with the 2.5m du Pont Telescope at Las Campanas Observatory (APOGEE-2S). MaNGA is an integral field spectroscopy survey of 10000 nearby galaxies (Bundy+ 2015ApJ...798....7B ; Law+ 2015AJ....150...19L ; Yan+ 2016AJ....152..197Y and Wake+ 2017, J/AJ/154/86). eBOSS is a spectroscopic survey of galaxies and quasars in the more distant universe (Dawson+ 2016AJ....151...44D). All these surveys use a fiber-plug-plate system to conduct observations. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3.dat 217 3326 The GOODSTARS table table4.dat 184 8646 The GOODVISITS table -------------------------------------------------------------------------------- See also: B/pollux : POLLUX database of synthetic stellar spectra (Palacios+ 2010-2021) VI/39 : Model Atmospheres (Kurucz, 1979) III/88 : Stellar Spectrophotometric Atlas (Gunn+ 1983) VII/102 : Spectrophotometric Atlas of Standard Stellar Spectra (Pickles 1985) III/166 : A New Library of Optical Spectra (Silva + 1992) III/218 : ELODIE archive (Prugniel+, 2001) III/232 : STELIB: A library of stellar spectra at R~2000 (Le Borgne+, 2003) VI/120 : High-resolution synthetic stellar library (Coelho+, 2005) V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) V/146 : LAMOST DR1 catalogs (Luo+, 2015) II/336 : AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016) II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016) I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) I/345 : Gaia DR2 (Gaia Collaboration, 2018) III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020) J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994) J/A+AS/125/229 : A standard stellar library (Lejeune+ 1997) J/A+AS/130/65 : A standard stellar library. II. (Lejeune+ 1998) J/PASP/110/863 : A Stellar Spectral Flux Library: 1150-25000AA (Pickles 1998) J/A+AS/133/221 : Library of ELODIE spectra (F5-K7 stars) (Soubiran+ 1998) J/A+AS/146/217 : Library of Spectra (0.5-2.5um) of Cool Stars (Lancon+ 2000) J/MNRAS/326/959 : Empirical calibration of the NIR Ca triplet (Cenarro+ 2001) J/A+A/404/661 : Fe5270, Fe5335, Mgb & Mg2 synthetic indices (Barbuy+, 2003) J/ApJS/152/251 : Indo-US library of coude feed stellar sp. (Valdes+, 2004) J/A+A/417/1055 : Extensive library of synthetic spectra (Zwitter+, 2004) J/A+A/442/1127 : Library of 2500-10500{AA} synthetic spectra (Munari+, 2005) J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006) J/MNRAS/374/664 : Stellar atmospheric param. in MILES library (Cenarro+, 2007) J/AJ/136/2070 : SEGUE stellar param. pipeline. III. (Allende Prieto+, 2008) J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008) J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009) J/MNRAS/404/1639 : MILES base models & new line index system (Vazdekis+, 2010) J/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011) J/A+A/568/A7 : Model SDSS colors for halo stars (Allende Prieto+, 2014) J/A+A/565/A117 : X-Shooter Spectral Library (XSL). DR1 (Chen+, 2014) J/other/RAA/15.1182 : M Dwarf catalog of LAMOST DR1 (Guo+, 2015) J/other/RAA/15.1154 : M-giant star candidates in LAMOST DR 1 (Zhong+, 2015) J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016) J/ApJS/226/1 : Carbon stars from LAMOST DR2 data (Ji+, 2016) J/ApJ/836/5 : Abundances of LAMOST giants from APOGEE DR12 (Ho+, 2017) J/AJ/154/86 : MaNGA catalog, DR15 (Wake+, 2017) Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 A6 --- VerDRP Version of the MaNGA Data Reduction Pipeline (DRPVer) 8- 13 A6 --- VerMProc Version of the MaStar post-processing pipeline (MPROCVer) 15- 25 A11 --- MaNGAId MaNGA ID 27 A1 --- f_MaNGAId Flag on MaNGAId (G1) 29- 33 I5 d MinMJD [57002/57942] Modified Julian Date of first visit to star (MINMJD) 35- 39 I5 d MaxMJD [57061/57942] Modified Julian Date of last visit to star (MAXMJD) 41- 42 I2 --- NVis [1/12] Number of visits to star; good + bad visits (NVISITS) 44- 45 I2 --- NPl [1/3] Number of different plates star is on (NPLATES) 47- 56 F10.6 deg RAdeg Right Ascension of star (J2000) at Ep=Epoch (OBJRA) 58- 67 F10.6 deg DEdeg [-30.1/86.5] Declination of star (J2000) at Ep=Epoch (OBJDEC) 69- 78 F10.6 deg RACdeg ? Right Ascension of star in photometry catalog (CATALOGRA) 80- 89 F10.6 deg DECdeg ? Declination of star in photometry catalog (CATALOGDEC) 91- 97 F7.2 yr Epoch [1999.2/2012]? Epoch of astrometry (CAT_EPOCH) (1) 99-107 F9.4 mag umag [15.6/22]?=-999 PSF u-band magnitude in passband_1 (PSFMAG_1) (G2) 109-117 F9.4 mag gmag [12.1/19.6]?=-999 PSF g-band magnitude in passband_2 (PSFMAG_2) (G2) 119-127 F9.4 mag rmag [11.5/18.5]?=-999 PSF r-band magnitude in passband_3 (PSFMAG_3) (G2) 129-137 F9.4 mag imag [10.6/18.7]?=-999 PSF i-band magnitude in passband_4 (PSFMAG_4) (G2) 139-147 F9.4 mag zmag [12.5/19.9]?=-999 PSF z-band magnitude in passband_5 (PSFMAG_5) (G2) 149-158 I10 --- MnGTarg2 [4/2064] MANGA_TARGET2 bitmask (G3) 160-168 F9.3 [cm/s2] log(g) [0.04/5.5]?=-999 Input catalog surface gravity (INPUT_LOGG) 170-176 F7.1 K Teff [3276/8771]?=-999 Input catalog effective temperature (INPUT_TEFF) 178-186 F9.3 [-] [Fe/H] [-3.3/0.9]?=-999 Input catalog metallicity [Fe/H] (INPUT_Fe_H) 188-196 F9.3 --- [a/Fe] [-1/0.7]?=-999 Input catalog [alpha/Fe] (INPUT_ALPHA_M) 198-211 A14 --- Source Source of the input stellar parameters (INPUT_SOURCE) 213-217 A5 --- Cat Photometry catalog (PS1, SDSS or APASS) (PHOTOCAT) -------------------------------------------------------------------------------- Note (1): Approximate epoch in case of PS1 and APASS catalogs. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 A6 --- VerDRP Version of MaNGA Data Reduction Pipeline (DRPVER) 8- 13 A6 --- VerMProc Version of MaStar post-processing pipeline (MPROCVER) 15- 25 A11 --- MaNGAId MaNGA ID 27 A1 --- f_MaNGAId Flag on MaNGAId (G1) 29- 33 I5 --- Plate [7997/10012] SDSS plate number 35- 39 A5 --- IFUdsgn IFU Design ID (IFUDESIGN) 41- 45 I5 d MJD [57002/57942] Modified Julian Date for visit 47- 56 F10.6 deg RAIdeg Right Ascension for center of IFU (IFURA) (1) 58- 67 F10.6 deg DEIdeg [-30.1/86.5] Declination for center of IFU (IFUDEC) (1) 69- 78 F10.6 deg RAdeg Right Ascension of star with unspecified epoch (J2000) (OBJRA) 80- 89 F10.6 deg DEdeg Declination of star with unspecified epoch (J2000) (OBJDEC) 91- 99 F9.4 mag umag [15.6/22]?=-999 PSF u-band magnitude in passband_1 (PSFMAG_1) (G2) 101-109 F9.4 mag gmag [12/19.6]?=-999 PSF g-band magnitude in passband_2 (PSFMAG_2) (G2) 111-119 F9.4 mag rmag [11.5/18.5]?=-999 PSF r-band magnitude in passband_3 (PSFMAG_3) (G2) 121-129 F9.4 mag imag [10.6/18.7]?=-999 PSF i-band magnitude in passband_4 (PSFMAG_4) (G2) 131-139 F9.4 mag zmag [12.5/20]?=-999 PSF z-band magnitude in passband_5 (PSFMAG_5) (G2) 141-150 I10 --- MnGTarg2 [4/2064] MANGA_TARGET2 bitmask (G3) 152-153 I2 --- NExp [1/10] Number of exposures during visit 155-162 F8.3 km/s HRV [-568/399] Heliocentric velocity (HELIOV) (2) 164-170 F7.3 km/s e_HRV [0.009/350]?=999 Uncertainty in HRV (VERR) 172-173 I2 --- f_HRV [0/1] Error code for HRV (0=good) (V_ERRCODE) 175-184 I10 --- q_MJD [0/320]? Bitmask for spectral quality flags (MJDQUAL) (3) -------------------------------------------------------------------------------- Note (1): Could be offset from the star Note (2): Used to shift the spectra to the rest frame. Note (3): See http://www.sdss.org/dr15/mastar/mastar-spectra/ -------------------------------------------------------------------------------- Global notes: Note (G1): MaNGAID provides a unique identifier in the great majority of cases, except for the following: a = 4-19555 is the same star as 27-1856 b = 4-17885 is the same star as 4-840 c = 4-823 is the same star as 3-134064467 d = 4-21098 is the same star as 4-20929 e = 4-20872 is the same star as 4-20905 f = 4-10681 is the same star as 3-12454116 g = 4-12664 is the same star as 3-95914294 Note (G2): The passbands of the PSF magnitude depend on the source of the photometry (see column "Cat"). If the photometry catalog is SDSS, then PSFMAG[1-5] are SDSS ugriz bands. If the photometry catalog is PS1, then PSFMAG[2-5] are Pan-STARRS DR1 griz bands. If the photometry catalog is APASS, then PSFMAG[2-4] are APASS (DR8) gri bands. Note (G3): A bitmask providing information about targeting and photometry. See http://www.sdss.org/dr15/algorithms/bitmasks/#MANGA_TARGET2 -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Mar-2021