J/MNRAS/351/1401 RcIcZ photometry of NGC 2547 (Jeffries+, 2004)
Low mass stars, brown dwarf candidates and the mass function of the
young open cluster NGC 2547.
Jeffries R.D., Naylor T., Devey C.R., Totten E.J.
<Mon. Not. R. Astron. Soc., 351, 1401-1422 (2004)>
=2004MNRAS.351.1401J 2004MNRAS.351.1401J
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, Cousins
Keywords: methods: data analysis - techniques: photometric - stars: formation -
stars: pre-main-sequence -
open clusters and associations: individual: NGC 2547
Abstract:
We present a catalogue of RcIcZ photometry over an area of 0.855
square degrees, centred on the young open cluster NGC 2547. The survey
is substantially complete to limits of Rc=21.5, Ic=19.5, Z=19.5. We
use the catalogue to define a sample of NGC 2547 candidates with
model-dependent masses of about 0.05-1.0M☉.
Description:
The observations were obtained between 1999 February 4 and 9
inclusive, using a 2048x2048 CCD mounted at the Cassegrain focus of
the 0.91-m telescope of the Cerro Tololo Interamerican Observatory.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 110 133788 Photometric and astrometric catalogue for NGC 2547
--------------------------------------------------------------------------------
See also:
J/MNRAS/335/291 : BVI photometry of NGC 2547 (Naylor+, 2002)
J/MNRAS/346/1143 : VI photometry of Collinder 121 (Burningham+, 2003)
J/MNRAS/358/13 : Faint dwarfs in NGC 2547 (Jeffries+, 2005)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Field Field number
4- 7 I4 --- Star Star number
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 20 F6.3 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 33 F5.2 arcsec DEs Declination (J2000)
36- 43 F8.3 pix Xpos X position
46- 53 F8.3 pix Ypos Y position
55- 61 F7.3 mag Icmag Cousins I magnitude
63- 69 F7.3 mag e_Icmag rms uncertainty on Icmag
71- 72 A2 --- n_Icmag Note on Icmag (1)
74- 81 F8.3 mag Rc-Ic Cousins R-I colour index
83- 89 F7.3 mag e_Rc-Ic rms uncertainty on Rc-Ic
91- 92 A2 --- n_Rc-Ic Photometry flags (1)
94-100 F7.3 mag Ic-Z Cousins I-Z colour index
102-107 F6.3 mag e_Ic-Z rms uncertainty on Ic-Z
109-110 A2 --- n_Ic-Z Photometry flags (1)
--------------------------------------------------------------------------------
Note (1): The flags consist of two alphabetic characters for each magnitude,
referring to the first and second measurements that contribute to the
final magnitude. Objects with no problems in their detection or
measurement are flagged 'OO', the other flags are described in
Burningham et al. (2003, Cat. J/MNRAS/346/1143), as follows:
O = O.K.
N = Non-stellar
E = Too close to CCD edge
B = Background fit failed
I = Ill-determined background
P = Position fit failed
S = Saturated
E = Too close to edge
F = Flagged pixel
R = Uncalibrated region
A = Absent input data
M = Negative (minus) counts
V = Variable
C = Large relative transparency correction (cloudy)
--------------------------------------------------------------------------------
History:
* 09-Sep-2005: Original version (apparently truncated with 109470 rows)
from http://www.astro.ex.ac.uk/people/timn/Catalogues/JNDT2004/
* 07-Feb-2008: Complete table (133788 rows) available
(End) Patricia Vannier [CDS] 24-Feb-2005