ii/348 vista variable in the via lactea survey dr2 (minniti+, 2017) ================================================================================ vista variables in the via lactea survey (vvv). catalogue data realese 2 (vvv cat). minniti d., lucas p., vvv team =2017ycat.2348....0m ================================================================================ adc_keywords: surveys ; infrared sources ; photometry, infrared mission_name: eso keywords: galaxy: bulge - galaxy: disk - galaxy: stellar content - stars: abundances - infrared: stars - surveys abstract: the vvv survey data delivered in this part of eso data release 2 (dr2) are based on the vista/vircam images that were acquired up to september 30, 2011, and processed by the cambridge astronomical survey unit (casu). this "vvv_cat" data release contains the single-epoch band-merged (z, y, j, h, ks) catalogues associated with the vvv tile images that have already been released in the part of dr2 identified as batch 2 of the "vvv' collection in the eso archive. vvv_cat contains 348 tile catalogues. description: the j, h and ks images for each tile were obtained contemporaneously within a single ob, so that the time interval between images in different filters does not exceed 20 minutes. the z and y images for each tile were grouped together in another ob, separate in time from the jhks obs. acknowledging vvv in publications: please use the following statement in any publication using these data: "based on data products from observations made with eso telescopes at the la silla paranal observatory under programme id 179.b-2002" file summary: -------------------------------------------------------------------------------- filename lrecl records explanations -------------------------------------------------------------------------------- readme 80 . this file vvv2.sam 711 1000 vvv catalog dr2 (2015-08-19) -------------------------------------------------------------------------------- see also: ii/337 : vista variables in the via lactea survey dr1 (saito+, 2012) byte-by-byte description of file: vvv2.sam -------------------------------------------------------------------------------- bytes format units label explanations -------------------------------------------------------------------------------- 1- 12 i12 --- srcid uid of this merged detection (sourceid) 14- 23 f10.6 deg raj2000 celestial right ascension (j2000) (ra2000) 25- 34 f10.6 deg dej2000 celestial declination (j2000) (dec2000) 36- 59 a24 --- iauname unique identifier in iau naming convention, vvv jhhmmss.ss+ddmmss.ss (iauname) 61- 72 i12 --- framesetid uid of the set of frames that this merged source comes from (framesetid) 74- 83 f10.6 deg glon galactic longitude (l) 85- 94 f10.6 deg glat galactic latitude (b) 96-104 f9.6 deg lambda sdss system spherical co-ordinate 1 (lambda) 106-116 f11.6 deg eta sdss system spherical co-ordinate 2 (eta) 118-129 i12 --- priorsec seam code for a unique (=0) or duplicated (!=0) source (priorsec) (1) 131-136 f6.2 --- mclassstat ? merged n(0,1) stellarness-of-profile statistic (mergedclassstat) 138-139 i2 --- mclass [-3-1] class flag, 1|0|-1|-2|-3|-9=gal|noise|star|probstar| probgal|saturated (mergedclass) 141-147 f7.3 mag z-y ? point source colour z-y (using apermag3) (zmypnt) 149-156 f8.3 mag e_z-y ? error on point source colour z-y (zmypnterr) 158-164 f7.3 mag j-h ? point source colour j-h (using apermag3) (jmhpnt) 166-173 f8.3 mag e_j-h ? error on point source colour j-h (jmhpnterr) 175-181 f7.3 mag h-ks ? point source colour h-ks (using apermag3) (hmkspnt) 183-190 f8.3 mag e_h-ks ? error on point source colour h-ks (hmkspnterr) 192-197 f6.3 mag zmag1 ? extended source z aperture corrected mag 1.0 arcsec diam (zapermag1) 199-204 f6.3 mag e_zmag1 ? default source z mag (1.0 arcsec aperture diameter) (zapermag1err) 206-211 f6.3 mag zmag3 ? default source z aperture corrected mag 2.0 arcsec diam (zapermag3) 213-222 f10.3 mag e_zmag3 ? error ind default source z mag 2.0 arcsec diam (zapermag3err) 224-229 f6.3 mag zmag4 ? extended source z aperture corrected mag 2.8 arcsec diam (zapermag4) 231-240 f10.3 mag e_zmag4 ? error in extended source z mag (2.8arcsec aperture diameter) (zapermag4err) 242-248 f7.3 pix zgausig ? rms of axes of ellipse fit in z 250-254 f5.1 deg zpa ? ellipse fit celestial orientation in z 256-258 f3.1 --- zell ? 1-b/a; where a/b=semi-major/minor axes in z (zell) 260-267 i8 --- zperrbits additional wfau post-processing error bits in z (zpperrbits) (2) 269-271 i3 --- zaveconf ? average confidence in 2 arcsec diameter default aperture 3 (aper3) z (zaverageconf) 273-279 i7 --- zseqnum ? running number of the z detection (zseqnum) 281-284 f4.2 arcsec zxi ? offset of z detection from master position (+east/-west) (zxi) 286-289 f4.2 arcsec zeta ? offset of z detection from master position (+north/-south) (zeta) 291-297 f7.3 mag ymag1 ? extended source y aperture corrected mag 0.7 arcsec aperture diameter (yapermag1) 299-304 f6.3 mag e_ymag1 ? error in extended source y mag 0.7 arcsec (yapermag1err) 306-312 f7.3 mag ymag3 ? default source y aperture corrected mag 2.0 arcsec aperture diameter (yapermag3) 314-321 f8.3 mag e_ymag3 ? error in default source y mag 2.0 arcsec aperture diameter (yapermag3err) 323-329 f7.3 mag ymag4 ? extended source y aperture corrected mag 2.8 arcsec diameter (yapermag4) 331-341 f11.3 mag e_ymag4 ? error in extended source y mag 2.8 arcsec (yapermag4err) 343-349 f7.3 pix ygausig ? rms of axes of ellipse fit in y 351-355 f5.1 deg ypa ? ellipse fit celestial orientation in y 357-359 f3.1 --- yell ? 1-b/a; where a/b=semi-major/minor axes in y (yell) 361-368 i8 --- yperrbits additional wfau post-processing error bits in y (ypperrbits) (2) 370-372 i3 --- yaveconf ? average confidence in 2 arcsec diameter default aperture (aper 3) y (yaverageconf) 374-380 i7 --- yseqnum ? running number of the y detection (yseqnum) 382-386 f5.2 arcsec yxi ? offset of y detection from master position (+east/-west) (yxi) 388-392 f5.2 arcsec yeta ? offset of y detection from master position (+north/-south) (yeta) 394-400 f7.3 mag jmag1 ? extended source j aperture corrected mag 0.7 arcsec diameter (japermag1) 402-408 f7.3 mag e_jmag1 ? error in extended source j mag 0.7 arcsec aperture diameter (japermag1err) 410-416 f7.3 mag jmag3 ? default source j aperture corrected mag 2.0 arcsec diameter (japermag3) 418-426 f9.3 mag e_jmag3 ? error in default source j mag 2.0 arcsec diameter (japermag3err) 428-434 f7.3 mag jmag4 ? extended source j aperture corrected mag 2.8 arcsec diameter (japermag4) 436-446 f11.3 mag e_jmag4 ? error in extended source j mag 2.8 arcsec aperture diameter (japermag4err) 448-454 f7.3 pix jgausig ? rms of axes of ellipse fit in j 456-460 f5.1 deg jpa ? ellipse fit celestial orientation in j 462-464 f3.1 --- jell ? 1-b/a; where a/b=semi-major/minor axes in j (jell) 466-473 i8 --- jperrbits additional wfau post-processing error bits in j (jpperrbits) 475-477 i3 --- javeconf ? average confidence in 2 arcsec diameter default aperture (aper3) j (javerageconf) 479-485 i7 --- jseqnum ? running number of the j detection (jseqnum) 487-491 f5.2 arcsec jxi ? offset of j detection from master position (+east/-west) (jxi) 493-497 f5.2 arcsec jeta ? offset of j detection from master position (+north/-south) (jeta) 499-505 f7.3 mag hmag1 ? extended source h aperture corrected mag 1.0 arcsec diam (hapermag1) 507-514 f8.3 mag e_hmag1 ? error in extended source h mag 0.7 arcsec aperture diameter (hapermag1err) 516-522 f7.3 mag hmag3 ? default source h aperture corrected mag 2.0 arcsec diameter (hapermag3) 524-531 f8.3 mag e_hmag3 ? error in default source h mag 2.0 arcsec diameter (hapermag3err) 533-539 f7.3 mag hmag4 ? extended source h aperture corrected mag 2.8 arcsec diameter (hapermag4) 541-551 f11.3 mag e_hmag4 ? error in extended source h mag 2.8 arcsec aperture diameter (hapermag4err) 553-559 f7.3 pix hgausig ? rms of axes of ellipse fit in h 561-565 f5.1 deg hpa ? ellipse fit celestial orientation in h 567-569 f3.1 --- hell ? 1-b/a; where a/b=semi-major/minor axes in h (hell) 571-578 i8 --- hperrbits additional wfau post-processing error bits in h (hpperrbits) 580-582 i3 --- haveconf ? average confidence in 2 arcsec diameter default aperture (aper3) h (haverageconf) 584-590 i7 --- hseqnum ? running number of the h detection (hseqnum) 592-596 f5.2 arcsec hxi ? offset of h detection from master position (+east/-west) (hxi) 598-602 f5.2 arcsec heta ? offset of h detection from master position (+north/-south) (heta) 604-610 f7.3 mag ksmag1 ? extended source ks aperture corrected mag 1.0 arcsec diameter (ksapermag1) 612-619 f8.3 mag e_ksmag1 ? error in extended source ks mag 0.7 arcsec aperture diameter (ksapermag1err) 621-627 f7.3 mag ksmag3 ? default source ks aperture corrected mag 2.0 arcsec diameter (ksapermag3) 629-636 f8.3 mag e_ksmag3 ? error ind default source ks mag 2.0 arcsec diameter (ksapermag3err) 638-644 f7.3 mag ksmag4 ? extended source ks aperture corrected mag 2.8 arcsec diameter (ksapermag4) 646-656 f11.3 mag e_ksmag4 ? error in extended source ks mag 2.8 arcsec aperture diameter (ksapermag4err) 658-664 f7.3 pix ksgausig ? rms of axes of ellipse fit in ks (ksgausig) 666-670 f5.1 deg kspa ? ellipse fit celestial orientation in ks (kspa) 672-674 f3.1 --- ksell ? 1-b/a; where a/b=semi-major/minor axes in ks (ksell) 676-683 i8 --- ksperrbits additional wfau post-processing error bits in ks (kspperrbits) 685-687 i3 --- kaveconf ? average confidence in 2 arcsec diameter default aperture (aper3) ks (ksaverageconf) 689-695 i7 --- ksseqnum ? running number of the ks detection (ksseqnum) 697-701 f5.2 arcsec ksxi ? offset of ks detection from master position (+east/-west) (ksxi) 703-707 f5.2 arcsec kseta ? offset of ks detection from master position (+north/-south) (kseta) 709-711 i3 --- flgvar [0/1]? classification of variability in this band (varflag) -------------------------------------------------------------------------------- note (1): primary sources have priorsec=0 or pri0rsec=framesetid note (2): we recommend that users should restrict their analysis to objects with zperrbits, yperrbits, etc<255 at all times and zperrbits=0 if they require the most reliable subset of the sources. values of zperrbits=16 indicate that the source was deblended, zperrbits=64 that at least one bad pixel was within the default aperture and zperrbits=128 that the source was low confidence within the default aperture." -------------------------------------------------------------------------------- history: * 26-apr-2017: this readme document was processed from the documents at http://eso.org/rm/publicaccess#/datareleases ================================================================================ (end) francois-xavier pineau, patricia vannier [cds] 13-apr-2017