Access to Astronomical Catalogues

← Click to display the menu
J/BaltA/12/301  Vilnius photometry in Barnard 1            (Cernis+, 2003)

Interstellar extinction in the direction of the Barnard 1 dark cloud in Perseus. Cernis K., Straizys V. <Baltic Astronomy, 12, 301-321 (2003)> =2003BaltA..12..301C
ADC_Keywords: Molecular clouds ; Photometry, Vilnius Keywords: techniques: photometric: Vilnius photometric system - stars: fundamental parameters, classification - ISM: extinction, dust clouds - ISM: individual objects: Barnard 1 Abstract: Spectral and luminosity classes, absolute magnitudes. color excesses, interstellar extinctions and distances are determined for 98 stars down to 13mag in the Barnard 1 dark cloud belonging to the Per OB2 association. The classification of stars is based on their photoelectric photometry in the Vilnius seven-color photometric system. The extinction vs. distance diagram exhibits the presence of two dust layers at 150 and 230pc distances. The distance of the first cloud, which gives an extinction AV of 0.3mag, coincides with the distance of the Taurus dark cloud complex. The second cloud with much larger extinction is about at the same distance as the clouds in the direction of the nearby objects: reflection nebula NGC 1333 and open cluster IC 348. Description: Photometry of stars was obtained by one of the authors (K. Cernis) with the 1 meter telescope at the Maidanak Observatory in Uzbekistan during three observing runs (1992, 1994 and 1996). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 72 128 Results of photometry table2.dat 74 128 Results of photometric quantification, determination of color excess, extinctions and distances of the stars notes.dat 80 82 Individual notes
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 4 A1 --- n_Seq [*] indicates a note detailed in notes.dat 5 A1 --- f_Seq [0] 0 = suspected binaries 7- 13 A7 --- BD BD number 17 I1 h RAh Right ascension (J2000.0) 19- 20 I2 min RAm Right ascension (J2000.0) 22- 23 I2 s RAs Right ascension (J2000.0) 25 A1 --- DE- Declination sign (J2000.0) 26- 27 I2 deg DEd Declination (J2000.0) 29- 32 F4.1 arcmin DEm Declination (J2000.0) 34- 38 F5.2 mag Vmag Vilnius V magnitude 40- 43 F4.2 mag U-V Vilnius U-V colour index 44 A1 --- u_U-V Uncertainty flag on U-V 46- 49 F4.2 mag P-V Vilnius P-V colour index 50 A1 --- u_P-V Uncertainty flag on P-V 52- 55 F4.2 mag X-V Vilnius X-V colour index 57- 60 F4.2 mag Y-V Vilnius Y-V colour index 62- 65 F4.2 mag Z-V Vilnius Z-V colour index 67- 70 F4.2 mag V-Z Vilnius V-Z colour index 72 I1 --- NObs Number of observations
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5 A1 --- n_Seq [*] indicates a note in notes.file 7- 15 A9 --- GSC GSC number 17- 27 A11 --- SpType Photometric MK spectral type 29- 36 A8 --- SpType2 Other MK spectral type 38- 42 F5.2 mag Vmag Vilnius V magnitude 44- 47 F4.1 mag VMAG ?=- Vilnius absolute V magnitude 48 A1 --- u_VMAG Uncertainty flag on VMAG 50- 53 F4.2 mag E(Y-V) ?=- Color excess in Y-V 54 A1 --- u_E(Y-V) Uncertainty flag on E(Y-V) 56- 59 F4.2 mag AV ?=- Absorption in V band 60 A1 --- u_AV Uncertainty flag on AV 62- 65 I4 pc r ?=- Distance 66 A1 --- u_r Uncertainty flag on r 68- 71 F4.2 mag sQ ? Quality flag (1) 72- 74 A3 --- n_sQ [Q,Q] Note on sQ (1)
Note (1): The classification is of the best quality when sQ=0.01mag. If sQ≥0.03, the star is peculiar or accuracy of its photometry is low. Q,Q stands for the G8-K5 type stars which were classified by the interstellar reddening-free QXZS,QXYZ or QUPY,QXZS diagrams.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number of the star 5- 80 A76 --- Note Text of the note
History: Prepared via OCR at CDS.
(End) Patricia Vannier [CDS] 21-Nov-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© Unistra/CNRS