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II/197 ISM towards IC 348 and Per Ob2 (Cernis, 1993)
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Interstellar extinction in the direction of the open cluster IC 348 and the
Per OB2 association
Cernis K.
<Baltic Astron. 2, 214 (1993)>
=1993BaltA...2..214C
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ADC_Keywords: Photometry, Vilnius ; Clusters, open ; Extinction ;
Associations, stellar
Keywords: open clusters and associations: general - dark clouds -
interstellar extinction - techniques: photometric -
photometry: Vilnius
Abstract:
The relationship between interstellar extinction and distance in
the direction of dark clouds in the areas around the open cluster
IC 348 and the association Per OB2 is determined using the results
of photoelectric photometry of 189 stars in the Vilnius
photometric system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 189 The results of photometry (all stars)
table2.dat 53 40 The results of photometric quantification of
stars in the vicinity of the dark cloud L1470
table4.dat 70 46 The results of photometric quantification of
IC 348 stars
table6.dat 69 100 The results of photometric quantification of
stars in the region of the association Per OB2
bal.tex 52 83 TeX definitions
tables.tex 179 670 TeX version of the tables
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
4 A1 --- n_Seq [*] Note (1)
6- 11 A6 --- BD BD designation
13- 17 I5 --- HD []? HD designation
19- 20 I2 h RAh Right ascension J2000
22- 23 I2 min RAm Right ascension J2000
25- 26 I2 s RAs Right ascension J2000
28- 29 I2 deg DEd Declination J2000
31- 34 F4.1 arcmin DEm Declination J2000
36- 43 A8 --- Sp spectral type
45- 49 F5.2 mag Vmag V magnitude (Vilnius system)
51- 54 F4.2 mag U-P U-P colour index (Vilnius system)
56- 59 F4.2 mag P-X P-X colour index (Vilnius system)
61- 64 F4.2 mag X-Y X-Y colour index (Vilnius system)
66- 69 F4.2 mag Y-Z Y-Z colour index (Vilnius system)
71- 74 F4.2 mag Z-V Z-V colour index (Vilnius system)
76- 79 F4.2 mag V-S V-S colour index (Vilnius system)
81 I1 --- n Number of independent observations
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Note (1):
6. IDS 90-59 AB, {DELTA}m = 1.6, D = 2.4" . Measured together.
22. Photometric classification is uncertain. Possible photometric binary star
as B3III+F5I.
36. ADS 2696A, {DELTA}m = 0.2, D = 6", measured separately.
37. ADS 2696B.
42. V magnitude from Hoffleit (1982).
63. ADS 2723, {DELTA}m = 0.0, D = 11.4", measured separately.
67. o Per. V magnitude from Hoffleit (1982).
69. The star has considerably lower Q_XZS_ values due to possible emission in
the H{alpha} line.
71. ADS 2729 AB, {DELTA}m = 0.2, D =1". Measured together.
77. ADS 2730, {DELTA}m = 0.2, D = 0.45" . Measured together.
97. LkH{alpha} 329 (Herbig and Rao 1972). The star has considerably lower
Q_XZS_ values.
102. LKH{alpha} 330 (Herbig and Rao 1972).
106. ADS 2723, {DELTA}m = 0.0, D = 11". Measured together.
117. ADS 2771A.
118. ADS 2772AB, {DELTA}m = 2.5, D = 3".
121. ADS 2784 AB, {DELTA}m = 2.0, D = 2".
123. SB, Var V467 Per, eclipsing binary system.
127. ADS 2804 AB, {DELTA}m = 4.7 , D = 1". Measured together.
147. ADS 2834 A, {DELTA}m = 5.7, D = 7". Measured together.
149. V magnitude from Hoffleit (1982).
152. ADS 2857, {DELTA}m = 2.3, D = 3". Measured together.
153. ADS 2859, {DELTA}m = 5.8, D = 22". Var X Per, ({gamma} Cas type).
Spectrum from Hoffleit (1982).
155. ADS 2866 AB, {DELTA}m = 3.4, D = 1". Measured together.
159. Var, NSV 1418, {beta} Cep- type.
163. V magnitude and spectrum from Hoffleit (1982).
186. ADS 2975 AB, {DELTA}m = 0.2, D = 2". Measured together.
188. Var, NSV 1459, V = 6.98 -- 7.27 (Hoffleit, 1982).
189. Var, AG Per, Eclipsing binary system. {DELTA}m = 0.8, D = 0.8".
Measured together.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- No Sequential number
5- 10 A6 --- BD BD number
12- 13 A2 --- Sp Spectral type
15 I1 --- n_Sp [1-2]? Note on Sp (1)
19- 25 A7 --- Sp(Viln) Spectral type from Vilnius system
27- 31 F5.2 mag Vmag V magnitude
33- 36 F4.1 mag Mv Absolute magnitude
37 A1 --- u_Mv uncertainty flag on Mv
39- 42 F4.2 mag E(B-V) Reddening
44- 47 F4.2 mag Av Visual extinction
49- 52 I4 pc Dist Distance
53 A1 --- u_Dist [)] uncertainty flag on Dist
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Note (1): References for the spectra:
1: Cannon and Mayall (1949), 2: AGK 3 catalog.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
4 A1 --- n_Seq [*] Note (1)
6- 11 A6 --- BD BD denomination
13- 14 I2 --- G []? Number in the Gingrich (1922) list
16- 17 A2 --- F Number in the Fredrick (1956) list
19- 25 A7 --- Sp Spectral type
27 A1 --- n_Sp [3-6] Note for Sp (2)
30- 37 A8 --- Sp(Viln) Spectral type from Vilnius system
39- 43 F5.2 mag Vmag V magnitude (Vilnius system)
45- 48 F4.1 mag Mv Absolute magnitude
49 A1 --- u_Mv Uncertainty flag on Mv
51- 54 F4.2 mag E(B-V) Redenning
56- 59 F4.2 mag Av Visual extinction
61- 64 I4 pc Dist Distance
65 A1 --- u_Dist [)] uncertainty flag on Dist
67- 70 A4 --- Mem Membership (3)
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Note (1): Numbers of the most reliable cluster members, estimated by Fredrick
(1956), are marked by asterisks.
Note (2): References for spectra:
3: Harris et al. (1954), 4: Strom et al. (1974),
5: Vyssotsky and Williams (1948), 6: Herbig and Rao (1972).
Note (3): nm: no member, m: member
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 10 A6 --- BD BD denomination
12- 18 A7 --- Sp Spectral type
20 A1 --- n_Sp [7-9] Note for Sp (1)
23- 30 A8 --- Sp(Viln) Spectral type from Vilnius system
35- 39 F5.2 mag Vmag V magnitude (Vilnius system)
44- 47 F4.1 mag Mv Absolute magnitude
48 A1 --- u_Mv uncertainty flag on Mv
50- 53 F4.2 mag E(B-V) Redenning
55- 58 F4.2 mag Av Visual extinction
60- 63 I4 pc Dist Distance
64 A1 --- u_Dist [)] uncertainty flag on Dist
66- 69 A4 --- Mem Membership (2)
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Note (1): References for spectra:
7: Guetter (1977), 8: Klochkova & Kopylov (1985)
9: Seyfert et al. (1960)
Note (2): nm: no member, m: member
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Table 3: Distances of the Perseus dark clouds
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Source Distance (pc) Method
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Heeschen (1951) 200-300, 800 star counts
Lynds (1969) 200-300 galaxy counts
Cernicharo et al. (1985) 200, 300 star counts
Cernis (1990) 160 and 220 photometric distance
This work 160 and 260 photometric distance
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Table 5: Distance of the open cluster IC 348
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Source Distance (pc) Method
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Gingrich (1922) 107 proper motion study
Greenstein (1948) 160 spectroscopic parallaxes
Harris et al. (1954) 380 spectroscopic parallaxes
Fredrick (1956) 480 proper motion study
Strom et al. (1974) 330 spectroscopic parallaxes
This work 260 photometric distance
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Table 7: Distance of the Per OB2 association
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Source Distance (pc) Method
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Blaauw (1952) 300 spectroscopic parallaxes
Morgan et al. (1953) 360 spectroscopic parallaxes
Seyfert et al. (1960) 400 spectroscopic parallaxes
Borgman and Blaauw (1964) 334 photometric distance
Racine (1968) 330 spectroscopic parallaxes
Guetter (1977) 413 spectroscopic parallaxes
Klochkova and Kopylov (1985) 340 spectroscopic parallaxes
This work 338 photometric distance
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References:
Cannoni A.J. & Mayall M.W., 1949, Ann. Harvard Obs., vol. 112
Fredrick L.W., 1956, AJ, 61, 437
Gingrich C.H., 1922, ApJ, 56, 139
Guetter H.H., 1977, AJ, 82, 598
Harris D.L. et al., 1954, ApJ, 119, 622
Herbig G.H. & Rao K., 1972, ApJ, 174, 401
Hoffleit D., 1982, The bright star catalogue, Yale University Observatory,
New Haven
Klochkova V.G. & KopylovJ.M., 1985, Izvestya Spec. Astrophys. Obs., 20, 3
Seyfert C.K. et al., 1960, APJ, 132, 58
Strom S.E. et al., 1974, PASP, 86, 798
Vyssotsky A.N. & Williams E.T.R., 1948, Publ. McCormick Obs., vol. 10
Courtesy: Vytas Straizys <Valiauga.Astro@itpa.fi.lt>
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(End) Patricia Bauer [CDS] 24-Nov-1994