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II/257A       A Finding List of Faint UV-Bright Stars     (Lanning+, 1973-2004)

A Finding List of Faint UV-Bright Stars in the Galactic Plane. Lanning H.H. <Publ. Astron. Soc. Pac. 85, 70 (1973)> =1973PASP...85...70L A Finding List of Faint UV-Bright Stars in the Galactic Plane II. Lanning H.H., Meakes M. <Publ. Astron. Soc. Pac. 106, 38 (1994)> =1994PASP..106...38L A Finding List of Faint UV-Bright Stars in the Galactic Plane III. Lanning H.H., Meakes M. <Publ. Astron. Soc. Pac. 107, 751 (1995)> =1995PASP..107..751L A finding list of faint UV-bright stars in the Galactic plane. IV. Lanning H.H <Publ. Astron. Soc. Pac. 110, 586 (1998)> =1998PASP..110..586L A finding list of faint UV-bright stars in the galactic plane. V. Lanning H.H., Meakes M. <Publ. Astron. Soc. Pac. 112, 251 (2000)> =2000PASP..112..251L A finding list of faint UV-bright stars in the galactic plane. VI. Lanning H.H., Meakes M. <Publ. Astron. Soc. Pac. 113, 1393 (2001)> =2001PASP..113.1393L A finding list of faint UV-bright stars in the galactic plane. VII. Lanning H.H., Meakes M. <Publ. Astron. Soc. Pac., 116, 1039 (2004)> =2004PASP..116.1039L
ADC_Keywords: Galactic plane; Photometry, UBV; Surveys ; Ultraviolet ; Blue objects Description: The 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 mB∼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 Introduction (by Nancy G. Roman): The Sandage two-color photographic survey was originally made in support of the UHURU X-ray satellite in order to identify those optical counterparts of the detected X-ray sources found in the galactic plane.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°). 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file lanning.dat 112 734 The stars with strong UV images (version 2012) notes.dat 80 399 Notes on individual stars annex.dat 58 308 Short notes and Sandage plate number for some stars (paper V-VII only) lan-ori.dat 58 734 Original version of the Lanning file (2006)
Byte-by-byte Description of file: lanning.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [Lan] 5- 7 I3 --- Lan [1,734]+ Lanning number (G1) 13- 14 I2 h RAh Hours of Right Ascension (J2000) 16- 17 I2 min RAm Minutes of Right Ascension (J2000) 19- 23 F5.2 s RAs Seconds of Right Ascension (J2000) 25 A1 --- DE- Sign of declination 26- 27 I2 deg DEd Degrees of declination (J2000) 29- 30 I2 arcmin DEm Minutes of declination (J2000) 32- 35 F4.1 arcsec DEs Seconds of declination (J2000) 37 A1 --- s Source of position (1) 40- 43 F4.1 mag Vmag ? Approximate blue magnitude 48-112 A65 --- Remarks Remarks, by B. Skiff
Note (1): sources are: A = USNO-A2.0 i(Cat. I/254), used only when that catalogue centers more accurately on the blue target B = Bordeaux meridian circle (Cat. I/300) C = Carlsberg meridian circle (Cat. I/304) L = Lepine & Shara LSPM (Cat. I/298) M = 2MASS (Cat. II/246) S = SDSS-DR7 (Cat. II/294) (by preference), or DR8 (Cat. II/306) T = Tycho-2 (Cat. I/259) U = UCAC2 (Cat. I/289) (by preference), or UCAC3 (Cat. I/315) north of +50° W = WISE (Cat. I/311); for uncrowded PNe, WISE centers accurately on the dust emission of the nebulae --- valuable when the central star cannot be measured directly b = USNO-B1.0 (Cat. I/284) g = GSC-2.3 (Cat. I/305) s = B. Skiff estimate, mainly for crowded stars where the regular catalogues are skewed - = "other", should be specified in the notes
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Lan [1,734]+= Lanning number (repeated when text longer than 76 characters) 5- 80 A76 --- Text Text of Note
Byte-by-byte Description of file: annex.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Lan [353,734]+= Lanning number 5- 11 A7 --- San Sandage Plate ID 13- 58 A46 --- Text Notes about Corresponding IDs, Spectral Type, U-B Magnitude
Byte-by-byte Description of file: lan-ori.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Lan [1,734]+ Lanning number (G1) 4 A1 --- n_Lan [*] indicates a note in notes.dat 6- 7 I2 h RA06h Right Ascension, original version (J2000) 9- 10 I2 min RA06m Right Ascension, original version (J2000) 12- 16 F5.2 s RA06s Right Ascension, original version (J2000) 18 A1 --- DE06- Sign of declination 19- 20 I2 deg DE06d Declination, original version (J2000) 22- 23 I2 arcmin DE06m Declination, original version (J2000) 25- 29 F5.2 arcsec DE06s Declination, original version (J2000) 32- 36 F5.2 mag Bmag ? Approximate blue magnitude 37 A1 --- u_Bmag : indicates B is uncertain 39- 42 F4.1 mag U-B ? Approximate U-B color index 43 A1 --- u_U-B : indicates U-B is uncertain 44- 49 F6.1 mas/yr pmRA ? Proper motion along right ascension (paper VII only) 51- 56 F6.1 mas/yr pmDE ? Proper motion along declination (paper VII only) 58 A1 --- Anx [a] Note in annex.dat file (paper V-VII only)
Global Notes: Note (G1): The Lanning numbers were defined in the papers: Paper I (1973PASP...85...70L) numbers 1- 82 Paper II (1994PASP..106...38L) numbers 83-135 Paper III (1995PASP..107..751L) numbers 136-195 Paper IV (1998PASP..110..586L) numbers 196-351 Paper V (2000PASP..112..251L) numbers 352-459 Paper VI (2001PASP..113.1393L) numbers 460-572 Paper VII (2004PASP..116.1039L) numbers 573-734
History: * 10-Feb-1997: Papers I, II and III (Lanning numbers 1-195) prepared by Nancy G. Roman (ADC/GSFC) [Catalog II/212] * 07-Aug-1998: Paper IV appended (Lanning numbers 196-351) at CDS [Catalog II/212A] * 15-Nov-2000: Paper V appended (Lanning numbers 352-459) at CDS [Catalog II/231] * 30-Jul-2006: Papers VI & VII appended (Lanning numbers 460-734) * 25-Aug-2006: Position of Lan 533 was corrected (from author) * 20-Jun-2012 (version 'A'): Positions, magnitudes revised by B. Skiff (Lowell Obs.) * 16-Jan-2013 (from B. Skiff): Lanning 384 was discovered to be a quadrupolar planetary nebula (Guerrero et al. arXiv:1301.3149; fixed comment in file "lanning.dat" Acknowledgments: The original author would like to thank Dr. R. J. Brucato for his assistance in the examination of some of the photographic plates for this two-color survey. Lanning and Meakes are very grateful to Dr. Peter Pesch for providing information regarding his unpublished observations of the high latitude sources noted in the text. They give special thanks to Dr. Allan Sandage for the opportunity to continue this survey. They also extend a special thanks to Dr. W. P. Bidelman who provided useful comments and information regarding the sources. They also greatly appreciate the ground-based observations taken by Dr. Alan Shafter (SDSU) and IUE data obtained by Dr. Al Schultz (CSC/STScI) in clarifying the classification of Lanning 185. Nancy G. Roman thanks Dr. Lanning for his help and particularly for a careful review of the files (Feb. 1997, corresponding to papers I-III) References: Blanco, V. M., Demers, S., Douglass, G. G., and FitzGerald, M. P. 1970, Pub. U.S. Naval Obs. 21, 1 (2nd series) Downes, R. A. 1986, ApJS, 61, 569 =1986ApJS...61..569D Downes, R. A. & Shara M.M., 1993 PASP 105, 127 =1993PASP..105..127D, (Cat. V/79) Garnavich, P. M., Szkody, P., Mateo, M., Feinswog, L., Booth, J., Goodrich, B., Miller, H. R., Carini, M. T., and Wilson, J. W. 1990, ApJ, 365, 696 =1990ApJ...365..696G Giclas, H. L., Burnham, R., Jr., and Thomas, N. G. 1971, Lowell Proper Motion Survey-Northern Hemisphere. The G Numbered Stars. (Flagstaff: Lowell Observatory). Greenstein, J. L. 1984, ApJ, 276, 602 =1984ApJ...276..602G Grueff, G., and Vigotti, M. 1972, Astr. and Ap. Suppl., 6, 1 (No. 1) =1972ApJS....6....1G Haro, G. and Herbig, G.H. 1955, Bol. Obs. Tonantzintla y Tacubaya, 12, 33 =1955BOTT...12...33H Heckathorn, J. N., Fesen, R. A., and Gull, T. R. 1982, A&AS, 114, 414 =1982A&AS..114..414H Horne K., Lanning H. H., Gomer R. H. 1982, Astr. J., 252, 681. =1982ApJ...252..681H Kukarkin, B. V., Kholopov, P. N., Efremov, Yu. N., Kukarkina, N. P., Kurochkin, N. E., Medvedeva, G. I., Perova, N. B., Fedorovich, V. P., and Frolov, M. S. 1970, General Catalogue of Variable Stars, 3rd ed. (Moscow: U.S.S.R. Academy of Sciences). Liller, W. 1972, I.A.U. Circ. No. 2415. =1972IAUC.2415.....L Luyten, W. J. 1963, Bruce Proper Motion Survey - The general Catalogue 2 (Minneapolis: University of Minnesota). McCook, G. P. and Sion, E. M. 1987 ApJS, 65, 603 =1987ApJS...65..603M Perek, L., and Kohoutek, L. 1967, Catalogue of Galactic Planetary Nebulae (Prague: Czechoslovak Academy of Sciences). Pounds, K. A., Allan, D. J., Barber, C., Barstow, M. A., Bertram, D., Branduardi-Raymont, G., Brebner, G.E.C., Buckley, D., Bromage, G.E., Cole, R.E., Courtier, M., Cruise, A.M., Culhane, J.L., Denby, M., Donoghue, D.O., Dunford, E., Georgantopoulos, I., Goodall, C.V., Gondhalekar, P.M., Gourlay, J.A., Harris, A.W., Hassall, B.J.M., Hellier, C., Hodgkin, S., Jeffries, R.D., Kellett, B.J., Kent, B.J., Lieu, R., Lloyd, C., McGale, P., Mason, K.O., Matthews, L., Mittaz, J.P.D., Page, C.G., Pankiewicz, G.S., Pike, C.D., Ponman, T.J., Puchnarewicz, E.M., Pye, J.P., Quenby, J.J., Ricketts, M.J., Rosen, S.R., Sansom, A.E., Sembay, S., Sidher, S., Sims, M.R., Stewart, B.C., Sumner, T.J., Vallance, R.J., Watson, M.G., Warwick, R.S., Wells, A.A., Willingale, R., Willmore, A.P., Willoughby, G.A. and Wonnacott, D. 1993, MNRAS, 260, 77 = 1993MNRAS.260...77P Russell, J.L., Lasker, B.M., McLean, B.J., Sturch, C.R., and Jenkner, H. 1990, AJ, 99, 2059 =1990AJ.....99.2059R Shafter, A. W., Lanning, H. H., and Ulrich, R. K. 1983, PASP, 95, 206 =1983PASP...95..206S Stephenson, C. B., and Sanduleak, N. 1977 ApJS, 33, 459 =1977ApJS..33..459S
(End) N.G. Roman [ADC]; F. Ochsenbein, P. Vannier, J. Marcout [CDS] 30-Jul-2006
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