J/PASP/117/22 NGC 6318 CCD BVI photometry (Piatti+, 2005)
A CCD BVI photometric study of the young, highly reddened open cluster NGC 6318.
Piatti A.E., Claria J.J., Ahumada A.V.
<Publ. Astron. Soc. Pac., 117, 22-31 (2005)>
=2005PASP..117...22P 2005PASP..117...22P
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Abstract:
We present CCD BVI photometry for the southern open cluster NGC 6318.
The sample consists of 9876 stars measured in an area of 13.6'x13.6',
extending down to V∼21.5mag. Star counts carried out within and
outside the cluster region allowed us to estimate the cluster angular
radius as 8'.
Description:
CCD images of the cluster field were obtained with the Johnson B and V
and Kron-Cousins I filters using the 0.9m telescope at the Cerro
Tololo Inter-American Observatory (CTIO; Chile) on 1998 June 17-18.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
17 17 58.5 -39 26 32 NGC 6318 = IRAS 17145-3923
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 67 9876 CCD BVI data of stars in the field of NGC 6318
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- PCA Star name (Cl* NGC 6318 PCA NNNN in Simbad)
6- 13 F8.3 pix Xpos X position (1)
15- 22 F8.3 pix Ypos Y position (1)
24- 29 F6.3 mag Vmag V magnitude
31- 35 F5.3 mag e_Vmag Error in Vmag
37 I1 --- o_Vmag Independent number of observations in V
39- 44 F6.3 mag B-V ?=99.999 B-V color index
46- 50 F5.3 mag e_B-V ?=9.999 Error in B-V
52 I1 --- o_B-V Independent number of observations in B-V
54- 59 F6.3 mag V-Ic ?=99.999 V-Ic color index
61- 65 F5.3 mag e_V-Ic ?=9.999 Error in V-Ic
67 I1 --- o_V-Ic Independent number of observations in V-Ic
--------------------------------------------------------------------------------
Note (1): The coordinates for the cluster center are:
(Xc, Yc)=(1060±20, 1330±30) pixels
for (RA, DE)=(17 16 11, -39 25 30) (J2000).
1pix=0.4". North is up and East is left.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 30-Aug-2005