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J/MNRAS/459/1403    M31 IRAC 3.6/4.5um extended survey   (Rafiei Ravandi+, 2016)

The extended disc and halo of the Andromeda galaxy observed with Spitzer-IRAC. Rafiei Ravandi M., Barmby P., Ashby M.L.N., Laine S., Davidge T.J., Zhang J., Bianchi L., Babul A., Chapman S.C. <Mon. Not. R. Astron. Soc., 459, 1403-1414 (2016)> =2016MNRAS.459.1403R (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Surveys ; Photometry, millimetric/submm Keywords: galaxies: individual: M31 - galaxies: spiral - galaxies: stellar content - infrared: galaxies Abstract: We present the first results from an extended survey of the Andromeda galaxy (M31) using 41.1h of observations by Spitzer-IRAC at 3.6 and 4.5µm. This survey extends previous observations to the outer disc and halo, covering total lengths of 44 and 66 along the minor and major axes, respectively. We have produced surface brightness profiles by combining the integrated light from background-corrected maps with stellar counts from a new catalogue of point sources. Using auxiliary catalogues, we have carried out a statistical analysis in colour-magnitude space to discriminate M31 objects from foreground Milky Way stars and background galaxies. The catalogue includes 426 529 sources, of which 66 per cent have been assigned probability values to identify M31 objects with magnitude depths of [3.6]=19.0±0.2, [4.5]=18.7±0.2. We discuss applications of our data for constraining the stellar mass and characterizing point sources in the outer radii. Description: This work is based on 41.1h of observations at 3.6 and 4.5um by IRAC during Spitzer's warm-mission Cycle 8 with program ID (80032), between 2012 September and November. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5.dat 39 60 IRAC 3.6um M31 surface brightness profile catalog.dat 781 426529 Catalog of Spitzer IRAC observations of the extended disk and halo of M31
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 13 F13.9 arcmin DG Deprojected galactocentric distance 16- 24 F9.6 mag/arcsec2 SuBr Spitzer/IRAC 3.6um surface brightness (Vega mag/arcsec2) 28- 39 F12.10 mag/arcsec2 e_SuBr ?=- rms uncertainty in surface brightness (Vega mag/arcsec2)
Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 7 A7 --- --- [M31IRAC] 9- 27 A19 --- ID M31IRAC name (JHHMMSS.ss+DDMMSS.s) (ID) 29- 34 I6 --- Seq Running object number (OBJECT_ID) (Seq) 36- 50 F15.13 --- RKron Kron apertures in units of A or B (KRON_RADIUS) 52- 58 F7.3 pix Aimage Profile rms along major axis (A_IMAGE) 60- 68 F9.3 pix Ximage Object position along x (X_IMAGE) 70- 78 F9.3 pix Yimage Object position along y (Y_IMAGE) 80- 88 F9.6 deg Xworld Barycenter position along world x axis (X_WORLD) 90- 98 F9.6 deg Yworld Barycenter position along world y axis (Y_WORLD) 100-108 F9.6 deg RAdeg Right ascension of barycenter (J2000) (ra) 110-118 F9.6 deg DEdeg Declination of barycenter (J2000) (dec) 120-124 F5.3 --- Ell 1 - BIMAGE/AIMAGE (ELLIPTICITY) 126-133 E8.4 deg FWHMW FWHM assuming a gaussian core (FWHM_WORLD) 135-138 F4.2 --- S/G S/G classifier output (CLASS_STAR) 140-143 F4.1 --- Flags Extraction flags (FLAGS) 145-151 F7.3 mag I1magAuto ?=-99 Kron-like elliptical 3.6um aperture magnitude (Vega) (MAGAUTOI1) 153-159 F7.3 mag e_I1magAuto ?=-99 rms error for AUTO 3.6um magnitude (Vega) (MAGGERRAUTOI1) 161-167 F7.3 mag I1magAp1 ?=-99 3 arcsec aperture 3.6um magnitude (Vega) (MAGAPER1I1) 169-175 F7.3 mag e_I1magAp1 ?=-99 rms error vector for 3 arcsec aperture 3.6um mag. (Vega) (MAGGERRAPER1I1) 177-183 F7.3 mag I1magAp2 ?=-99 4 arcsec aperture 3.6um magnitude (Vega) (MAGAPER2I1) 185-191 F7.3 mag e_I1magAp2 ?=-99 rms error vector for 4 arcsec aperture 3.6um mag. (Vega) (MAGGERRAPER2I1) 193-199 F7.3 mag I1magAp3 ?=-99 5 arcsec aperture 3.6um magnitude (Vega) (MAGAPER3I1) 201-207 F7.3 mag e_I1magAp3 ?=-99 rms error vector for 5 arcsec aperture 3.6um mag. (Vega) (MAGGERRAPER3I1) 209-215 F7.3 mag I1magAp4 ?=-99 6 arcsec aperture 3.6um magnitude (Vega) (MAGAPER4I1) 217-223 F7.3 mag e_I1magAp4 ?=-99 rms error vector for 6 arcsec aperture 3.6um mag. (Vega) (MAGGERRAPER4I1) 225-231 F7.3 mag I1magAp5 ?=-99 12 arcsec aperture 3.6um magnitude (Vega) (MAGAPER5I1) 233-239 F7.3 mag e_I1magAp5 ?=-99 rms error vector for 12 arcsec aperture 3.6um mag. (Vega) (MAGGERRAPER5I1) 241-247 F7.3 mag I1magIso ?=-99 Isophotal 3.6um magnitude (Vega) (MAGISOI1) 249-255 F7.3 mag e_I1magIso ?=-99 rms error for isophotal 3.6um magnitude (Vega) (MAGERRISOI1) 257-263 F7.3 mag I1magIsoC ?=-99 Corrected isophotal 3.6um magnitude (Vega) (MAGISOCORI1) 265-271 F7.3 mag e_I1magIsoC ?=-99 rms error for corrected isophotal 3.6um magnitude (Vega) (MAGERRISOCORI1) 273-284 F12.4 uJy FI1Auto ?=-99 Flux at 3.6um within a Kron-like elliptical aperture (FLUXAUTOI1) 286-293 F8.4 uJy e_FI1Auto ?=-99 rms error for AUTO flux at 3.6um (FLUXERRAUTOI1) 295-304 F10.4 uJy FI1Ap1 ?=-99 3 arcsec aperture flux at 3.6um (FLUXAPER1I1) 306-313 F8.4 uJy e_FI1Ap1 ?=-99 rms error for 3 arcsec aperture flux at 3.6um (FLUXERRAPER1I1) 315-324 F10.4 uJy FI1Ap2 ?=-99 4 arcsec aperture flux at 3.6um (FLUXAPER2I1) 326-333 F8.4 uJy e_FI1Ap2 ?=-99 rms error for 4 arcsec aperture flux at 3.6um (FLUXERRAPER2I1) 335-345 F11.4 uJy FI1Ap3 ?=-99 5 arcsec aperture flux at 3.6um (FLUXAPER3I1) 347-354 F8.4 uJy e_FI1Ap3 ?=-99 rms error for 5 arcsec aperture flux at 3.6um (FLUXERRAPER3I1) 356-366 F11.4 uJy FI1Ap4 ?=-99 6 arcsec aperture flux at 3.6um (FLUXAPER4I1) 368-374 F7.3 uJy e_FI1Ap4 ?=-99 rms error for 6 arcsec aperture flux at 3.6um (FLUXERRAPER4I1) 376-386 F11.4 uJy FI1Ap5 ?=-99 12 arcsec aperture flux at 3.6um (FLUXAPER5I1) 388-394 F7.3 uJy e_FI1Ap5 ?=-99 rms error for 12 arcsec aperture flux at 3.6um (FLUXERRAPER5I1) 396-407 F12.4 uJy FI1Iso ?=-99 Isophotal flux at 3.6um (FLUXISOI1) 409-416 F8.4 uJy e_FI1Iso ?=-99 rms error for isophotal flux at 3.6um (FLUXERRISOI1) 418-428 F11.3 uJy FI1IsoC ?=-99 Corrected isophotal flux at 3.6um (FLUXISOCORI1) 430-437 F8.4 uJy e_FI1IsoC ?=-99 rms error for corrected isophotal flux at 3.6um (FLUXERRISOCORI1) 439-445 F7.3 mag I2magAuto ?=-99 Kron-like elliptical aperture 4.5um magnitude (Vega) (MAGAUTOI2) 447-453 F7.3 mag e_I2magAuto ?=-99 rms error for AUTO 4.5um magnitude (Vega) (MAGGERRAUTOI2) 455-461 F7.3 mag I2magAp1 ?=-99 3 arcsec aperture 4.5um magnitude (Vega) (MAGAPER1I2) 463-469 F7.3 mag e_I2magAp1 ?=-99 rms error vector for 3 arcsec aperture 4.5um mag. (Vega) (MAGGERRAPER1I2) 471-477 F7.3 mag I2magAp2 ?=-99 4 arcsec aperture 4.5um magnitude (Vega) (MAGAPER2I2) 479-485 F7.3 mag e_I2magAp2 ?=-99 rms error vector for 4 arcsec aperture 4.5um mag. (Vega) (MAGGERRAPER2I2) 487-493 F7.3 mag I2magAp3 ?=-99 5 arcsec aperture 4.5um magnitude (Vega) (MAGAPER3I2) 495-501 F7.3 mag e_I2magAp3 ?=-99 rms error vector for 5 arcsec aperture 4.5um mag. (Vega) (MAGGERRAPER3I2) 503-509 F7.3 mag I2magAp4 ?=-99 6 arcsec aperture 4.5um magnitude (Vega) (MAGAPER4I2) 511-517 F7.3 mag e_I2magAp4 ?=-99 rms error vector for 6 arcsec aperture 4.5um mag. (Vega) (MAGGERRAPER4I2) 519-525 F7.3 mag I2magAp5 ?=-99 12 arcsec aperture 4.5um magnitude (Vega) (MAGAPER5I2) 527-533 F7.3 mag e_I2magAp5 ?=-99 rms error vector for 12 arcsec aperture 4.5um mag. (Vega) (MAGGERRAPER5I2) 535-541 F7.3 mag I2magIso ?=-99 Isophotal 4.5um magnitude (Vega) (MAGISOI2) 543-549 F7.3 mag e_I2magIso ?=-99 rms error for isophotal 4.5um magnitude (Vega) (MAGERRISOI2) 551-557 F7.3 mag I2magIsoC ?=-99 Corrected isophotal 4.5um magnitude (Vega) (MAGISOCORI2) 559-565 F7.3 mag e_I2magIsoC ?=-99 rms error for corrected isophotal 4.5um magnitude (Vega) (MAGERRISOCORI2) 567-578 F12.4 uJy FI2Auto ?=-99 Flux at 4.5um within a Kron-like elliptical aperture (FLUXAUTOI2) 580-586 F7.3 uJy e_FI2Auto ?=-99 rms error for AUTO flux at 4.5um (FLUXERRAUTOI2) 588-598 F11.4 uJy FI2Ap1 ?=-99 3 arcsec aperture flux at 4.5um (FLUXAPER1I2) 600-607 F8.4 uJy e_FI2Ap1 ?=-99 rms error for 3 arcsec aperture flux at 4.5um (FLUXERRAPER1I2) 609-619 F11.4 uJy FI2Ap2 ?=-99 4 arcsec aperture flux at 4.5um (FLUXAPER2I2) 621-628 F8.4 uJy e_FI2Ap2 ?=-99 rms error for 4 arcsec aperture flux at 4.5um (FLUXERRAPER2I2) 630-640 F11.4 uJy FI2Ap3 ?=-99 5 arcsec aperture flux at 4.5um (FLUXAPER3I2) 642-649 F8.4 uJy e_FI2Ap3 ?=-99 rms error for 5 arcsec aperture flux at 4.5um (FLUXERRAPER3I2) 651-661 F11.4 uJy FI2Ap4 ?=-99 6 arcsec aperture flux at 4.5um (FLUXAPER4I2) 663-670 F8.4 uJy e_FI2Ap4 ?=-99 rms error for 6 arcsec aperture flux at 4.5um (FLUXERRAPER4I2) 672-682 F11.4 uJy FI2Ap5 ?=-99 12 arcsec aperture flux at 4.5um (FLUXAPER5I2) 684-690 F7.3 uJy e_FI2Ap5 ?=-99 rms error for 12 arcsec aperture flux at 4.5um (FLUXERRAPER5I2) 692-703 F12.4 uJy FI2Iso ?=-99 Isophotal flux at 4.5um (FLUXISOI2) 705-712 F8.4 uJy e_FI2Iso ?=-99 rms error for isophotal flux at 4.5um (FLUXERRISOI2) 714-725 F12.4 uJy FI2IsoC ?=-99 Corrected isophotal flux at 4.5um (FLUXISOCORI2) 727-734 F8.4 uJy e_FI2IsoC ?=-99 rms error for corrected isophotal flux at 4.5um (FLUXERRISOCORI2) 736-745 F10.6 --- PM31 ?=-99 Probability for being M31 object (P_M31) (1) 747-758 F12.8 --- NROBUST ?=-99 Robust count = P(M31)/COMPLETENESS (N_ROBUST) (1) 760-770 F11.7 arcmin Rproj ?=-99 Projected galactocentric distance (R_PROJ) (1) 772-781 F10.6 arcmin Rdeproj ?=-99 Deprojected galactocentric distance (R_DEPROJ) (1)
Note (1): Based on analysis of this paper.
History: From electronic version of the journal Copied at http://irsa.ipac.caltech.edu/data/SPITZER/M31IRAC/
(End) Patricia Vannier [CDS] 28-Jul-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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