2012A&A...542L..25L

2012A&A...542L..25L - Astronomy and Astrophysics, volume 542, L25-25 (2012/6-1)

The solar hydrogen Lyman α to Lyman β line ratio.

LEMAIRE P., VIAL J.-C., CURDT W., SCHUEHLE U. and WOODS T.N.

Abstract (from CDS):

Abstract Copyright: ∼

Journal keyword(s): Sun: chromosphere - Sun: UV radiation - Sun: activity - Sun: heliosphere

Simbad objects: 1

Full paper

View the references in ADS

Basic data :
* alf Leo -- High Proper Motion Star Origin of the objects types : (Ref) Object type as listed in the reference "Ref" (acronym) Object type linked to the acronym according to the original reference () Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases Other object types: * (*,AG,...), ** (**,ADS,...), PM* (LTT,LSPM,...), IR (IRAS,IRC,...), V* (CSV,NSV), X (2E), UV (TD1), NIR (2MASS) Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference ICRS coord. (ep=J2000) : 10 08 22.31099 +11 58 01.9516 (Optical) [ 3.08 1.85 90 ] A 2007A&A...474..653V Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference FK4 coord. (ep=B1950 eq=1950) : 10 05 42.64272 +12 12 44.5542 [ 3.08 1.85 90 ] Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" : ra dec : right ascension and declination (unit and frame defined according to your Output Options) Grey values are increasing the original precision due to the computation of frame transformations (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam) [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue), position angle (in degrees North celestial pole to East) quality : flag of quality E ≥ 10" D : 1-10" (and some old data) C : 0.1-1" B : 0.01-0.1" + 2MASS, Tyc A : VLBI, Hipparcos bibcode : bibcode of the coordinates reference Gal coord. (ep=J2000) : 226.42735281 +48.93420887 [ 3.08 1.85 90 ] Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode" pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr) pm-dec : mu-dec (expressed in the ICRS system in mas/yr) [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg) quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the proper motion reference Proper motions mas/yr : -248.73 5.59 [0.35 0.21 0] A 2007A&A...474..653V Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode" value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity) [error] : error of the corresponding value displayed before (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown) quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality) bibcode : bibcode of the value's origin Radial velocity / Redshift / cz : V(km/s) 0.719522 [0.614515] / z(spectroscopic) 0.000002 [0.000002] / cz 0.72 [0.61]    (NIR) A 2020AJ....160..120J Syntax of parallax is : 'value quality [error] bibcode' value : parallax value quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality) [error] : mean error bibcode : bibcode of the parallax reference Parallaxes (mas): 41.13 [0.35] A 2007A&A...474..653V Spectral type is made of 3 parts: %coding is composed of 4 parts : the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities; a quality letter: A=best quality→E=worst quality, {� } =unknown quality % a quality letter: A=best quality -> E=worst quality, {� } =unknown quality bibcode : bibcode of the spectral type reference Spectral type: B8IVn C 2009ApJ...694.1085V Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode" filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z (System) : may be AB (default is Vega) flux-value : value of flux or magnitude [error] : error value quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality) MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4]) bibcode : bibcode of the flux reference Fluxes (8) : U 0.88 [~] C 2002yCat.2237....0D B 1.24 [~] C 2002yCat.2237....0D V 1.40 [0.05] C 2009ApJ...694.1085V R 1.37 [~] C 2002yCat.2237....0D I 1.47 [~] C 2002yCat.2237....0D J 1.54 [~] C 2002yCat.2237....0D H 1.57 [~] C 2002yCat.2237....0D K 1.62 [0.06] C 2009ApJ...694.1085V	SIMBAD within arcmin ', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay points in this preview 2MASS DSS SDSSXMMIRACIRISGALEX All (CDSPortal) Send to within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR. The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding. Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
Some important notes on this object about identifications and objects associations. notes: Not recovered in Gaia DR2 (I/345/gaia2) nor in Gaia DR3 (I/350/gaiaedr3)

LTT 12716	FK5 380	2MASS J10082229+1158018	SV* ZI 793
* alf Leo	GC 13926	N30 2414	TD1 14585
* 32 Leo	GCRV 6417	NAME Regulus	TIC 357348164
** STF 5006A	GEN# +1.00087901A	NLTT 23490	TYC 833-1381-1
ADS 7654 A	GJ 9316 A	NSV 4750	UBV 9452
AG+12 1199	HD 87901	PLX 2384	UBV M 15960
AP J10082229+1158018	HGAM 596	PMC 90-93 274	USNO-B1.0 1019-00203254
ASCC 949713	HIC 49669	PMSC 10030+1227A	uvby98 100087901 A
BD+12 2149	HIP 49669	PPM 127140	WDS J10084+1158A
CCDM J10083+1159A	HR 3982	RAFGL 4771S	WEB 9160
CSI+12 2149 1	IRAS 10056+1212	ROT 1536	YPAC 43
CSV 101099	IRC +10226	SAO 98967	[HFE83] 708
2E 2231	JP11 1896	SKY# 19511
2E 1005.5+1213	LSPM J1008+1158	SRS 30380

References (847 between 1850 and 2023) (Total 847) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object

Collections of Measurements

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * alf Leo

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