II/257Aivo://CDS.VizieR/II/257ACDSLanning H.H.2018-01-05T08:56:55Z2006-08-27T08:13:21ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-planesmilky-way-galaxyvisible-astronomyWide-band photometrysurveysultraviolet-astronomyThe survey lists the very blue objects found on the plates taken for the Sandage Two-Color Survey of the Galactic Plane obtained using the Palomar 48 inch Oschin Schmidt telescope. The sources range in U-B color from U-B~-0.1 to U-B~-1.0 and in magnitude from m_B_~10 to ~20. Introduction (by Nancy G. Roman): The Sandage two-color photographic survey was originally made in support of the UHURU X-ray satellite in order to identify those optical counterparts of the detected X-ray sources found in the galactic plane. During inspection of the plates, however, many UV-bright objects fainter than 10th magnitude were seen in the general field. A larger image in the U filter suggested the possibility of a bluer object as in the case of low-luminosity stars, white dwarfs, novae, CVs, normal early B stars, etc. As these are interesting in themselves, it was decided to publish a catalog for the use of other observers. This multi-color photographic technique has been described, for example, by Haro and Herbig (1955BOTT...12...33H). The survey was concentrated on objects with m(B)~10 or fainter. It employed the Palomar 48-in (Oschin) Schmidt telescope and was centered on the galactic plane with overlapping regions covering the galactic latitudes +/-9 degrees, and extending throughout most of the northern plane (l=0-227{deg}). Plates were taken by J. Kristian, A.R. Sandage, R.J. Brucato, and Lanning, primarily. The data presented here were found following a careful examination of the plates but it should not be assumed these data represent a complete survey of the fields examined. The categories were roughly calibrated against photoelectric (U-B) measures, but a full scale calibration program, including magnitude effects, etc. was not done. The numerical (U-B) limits of the tables should not therefore be taken precisely. The blue magnitude of the sources in the finding list has been estimated using these photoelectric values as a guide but should be considered accurate to only +/-0.5mag due to the difficulty of adjusting to the various plate characteristics. Positions were measured from images retrieved from the Space Telescope Science Institute collection of Guide Star digital plate scans. The accuracy of positions from the Guide Star Catalog images has been estimated to be on the order of 0.2-0.8arcsec (Russell et al. 1990AJ.....99.2059R) Information provided by Bidelman (private communication) resulted in the discovery that 15 positions for objects listed in Paper II were in error. Investigation indicated that an incorrect header was associated with the scan of the Guide Star plate originally archived onto optical disk. The incorrect astrometric solution, based on the use of an incorrect origin point, was subsequently applied in the positional determination when centroiding the object. The average offset for positions in right ascension is 14.17 seconds of time, with no detectable trend in the numbers. The offsets in declination range from +6.56 arcseconds through zero to -6.85 arcseconds as one progresses from west to east across the plate. This is consistent with a rotation being introduced into the bad plate solution. Objects with incorrect positions included Lanning 96, 97, 98, 99, 100, 102, 104, 108, 111, 113, 114, 115, 116, 119, and 122. the file lanning.dat contains the corrected coordinates. Description of version 'A' (B. Skiff, 20 June 2012): Improved coordinates and magnitudes are given for the 734 Lanning UV-bright stars. The positions were occasionally inconsistent and the magnitudes were rather poor. the coordinates should now good to a few tenths of an arcsecond, and the V magnitudes good to +/- 0.3 mag or so. The reported magnitudes were commonly up to 3 magnitudes off, with the general trend of being too bright at the bright end, and too faint at the faint end. All but the very brightest stars were examined on DSS, 2MASS, and Sloan images, and numerous (mostly small problems) were found with the identifications and mismarked charts. Some new Lanning double- identities were found, and additional extragalactic objects were identified. In the middle lists of the series, the coordinates were systematically off by 2"-4". It seems also that a few typos crept into the on-line file. Also, the chart for Lanning 676 does not match the sky at the nominal coordinates, so that object appears to be lost for now. All this is commented upon in the table "lanning.dat" A lot of the stars are quite blue in the visible, but persist in near-IR images, meaning they must have cool companions. Other stars were less obvious, and it seems many must be just ordinary stars, or result from infelicitous overlaps on the two-image plates.1973PASP...85...70Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/II/257ACatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/257Ahttps://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/257Ahttp://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/257Ahttps://vizier.cds.unistra.fr/viz-bin/votable?-source=II/257Ahttps://vizier.iucaa.in/viz-bin/votable?-source=II/257Ahttp://vizieridia.saao.ac.za/viz-bin/votable?-source=II/257AGETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table II/257A/lanning (Lanning's stars with strong UV images (includes also the 2006 data))https://vizier.cds.unistra.fr/viz-bin/conesearch/II/257A/lanning?https://vizier.iucaa.in/viz-bin/conesearch/II/257A/lanning?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/257A/lanning?GETtext/xml+votable180.050000true5.376958368.25436940.0055555555555555565/361 362 363 406 488 490 731 831 911 925 3871 3893 6120 6/1105 1116 1271 1278 1279 1283 1284 1285 1288 1289 1304 1307 1310 1311 1316 1319 1334 1337 1339 1340 1342 1346 1419 1420 1422 1423 1426 1427 1428 1429 1430 1441 1458 1461 1462 1463 1465 1474 1607 1616 1617 1618 1620 1621 1628 1649 1653 1654 1771 1779 1781 1785 1788 1789 1794 1796 1797 1930 1966 2936 2938 2939 2942 2943 2965 2966 2967 2968 2970 2973 2974 2993 2997 3008 3009 3011 3016 3018 3019 3020 3021 3023 3025 3026 3027 3028 3032 3033 3041 3069 3071 3095 3124 3126 3139 3142 3145 3149 3152 3153 3157 3160 3162 3163 3165 3169 3170 3173 3175 3182 3184 3189 3194 3196 3198 3199 3264 3265 3266 3268 3270 3271 3273 3275 3276 3277 3278 3283 3287 3288 3289 3291 3292 3293 3295 3296 3297 3301 3303 3305 3308 3309 3311 3312 3314 3315 3316 3319 3320 3321 3322 3328 3329 3330 3332 3336 3342 3344 3352 3353 3360 3365 3368 3369 3370 3374 3375 3457 3459 3465 3466 3467 3468 3471 3489 3490 3491 3492 3494 3496 3499 3500 3599 3610 3611 3620 3622 3623 3626 3627 3630 3632 3637 3641 3650 3652 3655 3658 3662 3663 3664 3669 3676 3678 3681 3682 3684 3686 3688 3690 3693 3694 3696 3699 3705 3707 3713 3717 3729 3768 3775 3777 3779 3782 3787 3789 3800 3843 3849 9486 9512 9513 12847 12859 12928 12931 12936 12945 12953 12961 12964 12968 12987 13300 13301 13303 13305 13310 13958 13961 13962 13963 13964 13965 13976 13978 13984 13995 13997 14000 14235 14238 14247 14256 14258 14260 14262 14263 14268 14333 14367 14415 14669 14672 14673 14676 14677 14679 14689 14692 14695 14697 14700 14705 14714 14718 14719 14791 14801 14804 14805 14809 14810 14811 14814 14833 15362 15389 15392 15394 15400 15404 15409 15411 15412 15414 15416 15434 15451 15453 15454 15462 15463 15468 15470 15473 15474 15475 15476 15481 15482 15483 15493 15506 15507 15511 15516 15518 15552 15553 15568 15569 15580 15616 15618 15625 15627 15630 15636 15640 15648 15650 15651 15652 15654 15655 15657 15658 15672 15700 15708 15710 15721 15733 15739 15744 15825 15828 22069 22165 22210 22215 22224 23767 23797 23939 23942 23943 23946 23950 23982 24310 24311 24373 24379 24381 24383 24393 24455 24458 24463 24464 24466 24469 24471 24473 24474 24476 24486 24487 24488 24489 24493 24495 24501 24514 24522 29070 29071 29083 29089 29091 29092 29093 29095 29101 29102 29103 29105 29106 29107 29108 29110 29114 29116 29117 29160 29441 29444 29446 29456 29459 29462 30211 30336 30406https://cdsarc.cds.unistra.fr/viz-bin/moc/II/257A?format=asciiUVOpticaldefaultII/257A/lanningLanning's stars with strong UV images (includes also the 2006 data)u_Bmag: indicates B is uncertainmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLan[1,734]+ Lanning number (G1)meta.id;meta.mainintprimaryindexedRA06Right Ascension, original version (J2000)pos.eq.ra;meta.mainDE06Declination, original version (J2000)pos.eq.dec;meta.mainBmag? Approximate blue magnitudemagphot.mag;em.opt.BfloatnullableU-B? Approximate U-B color indexmagphot.color;em.opt.U;em.opt.Bfloatnullableu_U-B: indicates U-B is uncertainmeta.code.error;phot.color;em.opt.UcharASimbad column added by the CDSmeta.ref.urlcharRAJ2000Hours of Right Ascension (J2000)pos.eq.raDEDegrees of declination (J2000)pos.eq.decsSource of position (1)meta.ref;pos.framecharVmag? Approximate blue magnitudemagphot.mag;em.opt.VfloatnullableRemarksRemarks, by B. Skiffmeta.notecharSimbadSimbad column added by the CDSmeta.refcharII/257A/annexShort notes and Sandage plate number for some stars (paper V-VII only)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLan[353,734]+= Lanning numbermeta.id;meta.mainintSanSandage Plate IDobs.fieldcharTextNotes about Corresponding IDs, Spectral Type, U-B Magnitudemeta.notecharII/257A/notesNotes on individual starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLan[1,734]+= Lanning number (repeated when text longer than 76 characters)meta.id;meta.mainintTextText of Notemeta.notechar