ADC/CDS Standard Document for Catalog:/journal_tables/A+AS/111/85/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
J/A+AS/111/85 Open cluster Pis 20 (Vazquez+, 1995)
================================================================================
A detailed study of the open cluster Pismis 20
Vazquez R.A., Will J.-M., Prado P., Feinstein A.
<Astron. Astrophys. Suppl. Ser. 111, 85 (1995)>
=1995A&AS..111...85V (SIMBAD/NED Reference)
================================================================================
ADC_Keywords: Clusters, open; Photometry, CCD
Keywords: open cluster: Pis 20 - stars: mass function - stars: WR -
stars: individual: WR 67; Wolf-Rayet
Description:
The very young open cluster Pis 20 has been investigated using CCD UBVR
photometry. New blue faint members were found down to V=19mag. With them
we obtain a better definition of the lower cluster main sequence. Using
the fitting method, we derive a cluster distance of d=3600pc
(V_0_-M_V_=12.80). The mean color excess is <E_B-V_>=1.24mag.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2 48 196 Observed colors and magnitudes in Pismis 20
table5 63 127 Intrinsic colors, magnitudes and masses of
Pismis 20 stars
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 4 I3 --- SeqNum Sequential star number
6- 11 F6.2 --- X X position
13- 18 F6.2 --- Y Y position
20- 24 F5.2 mag Vmag V magnitude
25- 26 A2 --- u_Vmag [: ] Uncertainty flag on Vmag (1)
28- 31 F4.2 mag B-V B-V colour index
32- 33 A2 --- u_B-V [: ] Uncertainty flag on B-V (1)
35- 39 F5.2 mag U-B []? U-B colour index
40- 41 A2 --- u_U-B [: ] Uncertainty flag on U-B (1)
43- 46 F4.2 mag V-R []? V-R colour index
47- 48 A2 --- u_V-R [: ] Uncertainty flag on V-R (1)
--------------------------------------------------------------------------------
Note (1): ' :' indicates stars with error from 0.07 to 0.10 mag
'::' indicates stars with errors larger than 0.10 mag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
2- 4 I3 --- SeqNum Sequential star number
6- 10 F5.2 mag V0 Intrinsic V magnitude
15- 19 F5.2 mag (B-V)0 []? Intrinsic B-V colour index
23- 26 F4.2 mag E(B-V) []? B-V colour excess
31- 35 F5.2 mag (U-B)0 []? Intrinsic U-B colour index
39- 42 F4.2 mag E(U-B) []? U-B colour excess
44- 48 F5.2 mag MV Absolute V magnitude
54- 59 F6.3 solMass Mass Star mass
63 A1 --- Rem [ab*] Remarks (1)
--------------------------------------------------------------------------------
Note (1): (a) indicates that color excesses were computed through a relation
between spectral types and color indices following
Schmidt-Kaler (1982 in: Landolt-Bornstein, Neue Serie VI/2b)
(b) V_0_ was obtained adopting a mean cluster reddening
<E_B-V_ >= 1.24. The mass corresponds to the most
massive cluster star
(*) denotes possible members
================================================================================
(End) Patricia Bauer [CDS] 16-Jan-1995