II/91 Intrinsic Colours of Stars in the Ultraviolet (Carnochan 1982)
Catalogue of Intrinsic Colours of Stars in the Ultraviolet
Carnochan D.J.
<Mon. Not. Roy. Astron. Soc. 201, 1139 (1982)>
=1982MNRAS.201.1139C 1982MNRAS.201.1139C
ADC_Keywords: Photometry, ultraviolet ; Colors
Mission_Name: TD1
Description:
The catalog contains intrinsic ultraviolet colors for normal stars
between O6.5V and K3III. These have been derived from the absolute
ultraviolet fluxes obtained by the S2/68 Ultraviolet Sky Survey
Telescope aboard the ESRO TD1 satellite, corrected to the standard
calibration of Bohlin et al. (1981) for the star eta UMa. The catalog
contains 671 records, one for each MK spectral type and luminosity
class between O6.5Ia and K3V. Each record consists of twenty-five
broad- and narrow-band colors in the form (m(lambda) - V)(0) covering
the wavelength range 1400A to 2740A. Complementary data including
(B-V)(0), (U-B)(0), and absolute visual magnitude, M(v), are also
given for each type.
The intrinsic ultraviolet colours cover three groups of passbands:
(1) Four broadband fluxes (width 330 Angstroms) centred on
1565A, 1965A, 2365A and 2740A.
(2) Nine narrowband fluxes (width 110 Angstroms) centred on
1455A, 1565A, 1675A, 1855A, 1965A, 2075A, 2255A, 2365A, 2465A
(3) Twelve narrowband fluxes (width 100 Angstroms) centred on
1400A, 1500A, 1600A, 1700A, 1800A, 1900A, 2000A, 2100A, 2200A,
2300A, 2400A, 2500A
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 322 671 *The catalogue of Intrinsic Colors
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Note on catalog.dat: the individual errors, ERR(K), for each passband, K,
are given so that the mean error, ERRM, and the error scaling factors,
ESF(K), are not needed. The printed version only contains the mean
error with the individual errors being computed from the relation:
ERR(K)=ERRM*ESF(K)
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See also:
II/59 : Catalogue of stellar UV fluxes (TD1) (Thompson et al., 1978)
II/86 : UV Bright-Star Spectrophotometric Supplement (Macau-Hercot+ 1978)
III/39 : UV Bright Star Spectrophotometric Catalog (Jamar et al., 1976)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- MKClass MK Classification (Class=2bytes,
Subclass=3bytes, Luminosity=6bytes)
12- 14 I3 --- MK1 *?=1 Coded MK Class (1)
15- 17 I3 --- MK2 *?=1 Coded MK Subclass (1)
18- 20 I3 --- MK3 *?=1 Coded MK Luminosity (1)
21- 26 F6.2 mag B-V ?=99.99 B-V color
27- 32 F6.2 mag U-B ?=99.99 U-B color
33- 37 F5.1 mag VMag ?=99.9 Mv, Abs Visual Mag
38- 41 I4 --- Nstar ?=-1 Number of stars
42- 47 F6.2 mag ErrM ?=99.99 Mean error of UV colours
48- 53 F6.2 mag C1565B ?=99.99 (1565-V) broad (330A)
54- 58 F5.2 mag e_C1565B ?=-1.00 Error in (1565-V)
59- 64 F6.2 mag C1965B ?=99.99 (1965-V) broad (330A)
65- 69 F5.2 mag e_C1965B ?=-1.00 Error in (1965-V)
70- 75 F6.2 mag C2365B ?=99.99 (2365-V) broad (330A)
76- 80 F5.2 mag e_C2365B ?=-1.00 Error in (2365-V)
81- 86 F6.2 mag C2740B ?=99.99 (2740-V) broad (330A)
87- 91 F5.2 mag e_C2740B ?=-1.00 Error in (2740-V)
92- 97 F6.2 mag C1455N ?=99.99 (1455-V) narrow (110A)
98-102 F5.2 mag e_C1455N ?=-1.00 Error in (1455-V)
103-108 F6.2 mag C1565N ?=99.99 (1565-V) narrow (110A)
109-113 F5.2 mag e_C1565N ?=-1.00 Error in (1565-V)
114-119 F6.2 mag C1675N ?=99.99 (1675-V) narrow (110A)
120-124 F5.2 mag e_C1675N ?=-1.00 Error in (1675-V)
125-130 F6.2 mag C1855N ?=99.99 (1855-V) narrow (110A)
131-135 F5.2 mag e_C1855N ?=-1.00 Error in (1855-V)
136-141 F6.2 mag C1965N ?=99.99 (1965-V) narrow (110A)
142-146 F5.2 mag e_C1965N ?=-1.00 Error in (1965-V)
147-152 F6.2 mag C2075N ?=99.99 (2075-V) narrow (110A)
153-157 F5.2 mag e_C2075N ?=-1.00 Error in (2075-V)
158-163 F6.2 mag C2255N ?=99.99 (2255-V) narrow (110A)
164-168 F5.2 mag e_C2255N ?=-1.00 Error in (2255-V)
169-174 F6.2 mag C2365N ?=99.99 (2365-V) narrow (110A)
175-179 F5.2 mag e_C2365N ?=-1.00 Error in (2365-V)
180-185 F6.2 mag C2475N ?=99.99 (2475-V) narrow (110A)
186-190 F5.2 mag e_C2475N ?=-1.00 Error in (2475-V)
191-196 F6.2 mag C1400N ?=99.99 (1400-V) narrow (100A)
197-201 F5.2 mag e_C1400N ?=-1.00 Error in (1400-V)
202-207 F6.2 mag C1500N ?=99.99 (1500-V) narrow (100A)
208-212 F5.2 mag e_C1500N ?=-1.00 Error in (1500-V)
213-218 F6.2 mag C1600N ?=99.99 (1600-V) narrow (100A)
219-223 F5.2 mag e_C1600N ?=-1.00 Error in (1600-V)
224-229 F6.2 mag C1700N ?=99.99 (1700-V) narrow (100A)
230-234 F5.2 mag e_C1700N ?=-1.00 Error in (1700-V)
235-240 F6.2 mag C1800N ?=99.99 (1800-V) narrow (100A)
241-245 F5.2 mag e_C1800N ?=-1.00 Error in (1800-V)
246-251 F6.2 mag C1900N ?=99.99 (1900-V) narrow (100A)
252-256 F5.2 mag e_C1900N ?=-1.00 Error in (1900-V)
257-262 F6.2 mag C2000N ?=99.99 (2000-V) narrow (100A)
263-267 F5.2 mag e_C2000N ?=-1.00 Error in (2000-V)
268-273 F6.2 mag C2100N ?=99.99 (2100-V) narrow (100A)
274-278 F5.2 mag e_C2100N ?=-1.00 Error in (2100-V)
279-284 F6.2 mag C2200N ?=99.99 (2200-V) narrow (100A)
285-289 F5.2 mag e_C2200N ?=-1.00 Error in (2200-V)
290-295 F6.2 mag C2300N ?=99.99 (2300-V) narrow (100A)
296-300 F5.2 mag e_C2300N ?=-1.00 Error in (2300-V)
301-306 F6.2 mag C2400N ?=99.99 (2400-V) narrow (100A)
307-311 F5.2 mag e_C2400N ?=-1.00 Error in (2400-V)
312-317 F6.2 mag C2500N ?=99.99 (2500-V) narrow (100A)
318-322 F5.2 mag e_C2500N ?=-1.00 Error in (2500-V)
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Note on MK1, MK2, MK3:
MK1,MK2,MK3 are 3 parts of a 4-digit coding scheme for
MK spectral types: (MK4 giving the primary peculiarity)
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K MK1 MK2 MK3 MK4
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1
2
3 WC 0 I p
4 WN 0.5 Ia m
5 O 1 Iab e
6 B 1.5 Ib f
7 A 2 Ib-II k
8 F 2.5 II n
9 G 3 II-III
10 K 3.5 III
11 M 4 III-IV
12 N 4.5 IV
13 R 5 IV-V
14 S 5.5 V
15 6 VI
16 6.5 VII
17 7
18 7.5
19 8
20 8.5
21 9
22 9.5
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e.g: (6,9,13,3) represents a B3IV-Vp star.
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FORTRAN programs for accessing the intrinsic colours:
FORTRAN programs for accessing the intrinsic colours might
make use of the following lines of code:
C S2/68 Passbands and Extinction Values.
COMMON /INTRIN/IWAVE(25),IWIDTH(25),DELTAM(25),ESF(25),
1 EXT(25),SIGEXT(25),
C
C Intrinsic Colours for current MK type.
COMMON /MKTYPE/CMK(4),MK(3),BV,UB,VMAG,NSTAR,ERRM,
1 COL(25),ERR(25)
C
C Central Wavelength for each passband (Angstroms).
DATA IWAVE/1565,1965,2365,2740,
1 1455,1565,1675, 1855,1965,2075, 2255,2365,2475,
2 1400,1500,1600,1700, 1800,1900,2000,2100,
3 2200,2300,2400,2500/
C
C Width of each passband (Angstroms).
DATA IWIDTH/3*330,310, 9*110, 12*100/
C
C Correction ADDED to original S2/68 colours to bring values
C into line with Bohlin et al calibration (magnitudes).
DATA DELTAM/-0.04,-0.02,-0.01,-0.19, -0.11,-0.07,+0.08,
1 -0.02,-0.02,-0.04, +0.02,-0.01,-0.04,
2 -0.14,-0.10,-0.02,+0.08, -0.02,-0.02,-0.03,-0.03,
3 +0.01,+0.03,-0.02,-0.03/
C
C Error scaling factors: ERR(K)=ERRM*ESF(K)
DATA ESF/1.08,0.82,0.70,0.46, 1.39,1.24,1.12,
1 1.11,1.05,1.05, 0.90,0.85,0.79,
2 1.50,1.34,1.16,0.97, 0.85,0.83,0.77,0.74,
3 0.77,0.72,0.68,0.64/
C
C Interstellar Extinction: A(lambda)/E(B-V).
DATA EXT/8.09,8.19,8.17,6.24, 8.37,7.97,7.78,
1 7.72,8.30,9.13, 9.36,8.21,7.30,
2 8.60,8.15,7.89,7.74, 7.62,7.90,8.55,9.32,
3 9.87,8.94,7.86,7.14/
C
C Error in Extinction.
DATA SIGEXT/3*0.10,0.05, 9*0.10, 12*0.10/
C
C
C
C
C Read next set of intrinsic colours.
READ (MT,901) CMK,MK,BV,UB,VMAG,NSTAR,ERRM,
1 (COL(K),ERR(K),K=1,25)
901 FORMAT (A2,A3,A4,A2, 3I3, 2F6.2,F5.1, I4,F6.2,
1 25(F6.2,F5.2),1X)
History:
The catalog was prepared by David J Carnochan,
University College London,
on 18th July 1982
References:
Bohlin, R.C., Holm, A.V., Savage, D.B., Snijders, M.A.J., and Sparks,
W.M. 1981, A&A, 85, 1 (1980A&A....85....1B 1980A&A....85....1B)
(End) [CDS] 03-Jul-1998