J/A+A/540/A58 CT1T2 photometry of 26 LMC cluster (Piatti, 2012)
Washington photometry of 26 moderately young small angular size clusters in the
Large Magellanic Cloud.
Piatti A.E.
<Astron. Astrophys. 540, A58 (2012)>
=2012A&A...540A..58P 2012A&A...540A..58P
ADC_Keywords: Magellanic Clouds ; Associations, stellar ; Photometry, CMT1T2V
Keywords: techniques: photometric - galaxies: star clusters -
galaxies: individual: LMC
Abstract:
With the aim of enlarging the number of studied LMC clusters in the
age range 8.0~<log(t)~<9.0, we focus here on a sample of mostly
unstudied cluster candidates.
We present, for the first time, CCD Washington CT1T2 photometry of
stars in the field of 26 LMC clusters.
The studied clusters turned out to be small angular size objects with
ages within the age range 8.0~<log(t)~< 9.0, which are projected or
immersed in dense star fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 26 Star clusters in the LMC
table2.dat 79 90396 CT1T2 data of stars in the field of NGC 2093
table3.dat 48 26 Fundamental parameters of LMC clusters
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See also:
J/AcA/50/337 : OGLE LMC star clusters (Pietrzynski+, 2000)
J/A+A/517/A50 : Young SMC/LMC star clusters ages + luminosities (Glatt+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Star Cluster
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 19 I2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 29 I2 arcsec DEs Declination (J2000)
31- 36 F6.2 deg GLON Galactic longitude
38- 43 F6.2 deg GLAT Galactic latitude
45- 54 A10 "YYYY/MM/DD" Date Observation date
56- 59 I4 s ExpC Exposure time in C band
61- 63 I3 s ExpR Exposure time in R band
65- 67 I3 s ExpI Exposure time in I band
69- 73 F5.3 --- Air.C Airmass in C band
75- 79 F5.3 --- Air.R Airmass in R band
81- 85 F5.3 --- Air.I Airmass in I band
87- 89 F3.1 arcsec See.C Seeing in C band
91- 93 F3.1 arcsec See.R Seeing in R band
95- 97 F3.1 arcsec See.I Seeing in I band
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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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2- 7 I6 --- Seq [102814/440803] Sequential number
9- 16 F8.3 pix Xpos X position (scale and orientation unspecified)
18- 25 F8.3 pix Ypos Y position (scale and orientation unspecified)
28- 33 F6.3 mag T1mag Washington T1 magnitude
34 A1 --- --- [0]
38- 42 F5.3 mag e_T1mag rms uncertainty on T1mag
43 A1 --- --- [0]
46- 51 F6.3 mag C-T1 Washington C-T1 colour index
52 A1 --- --- [0]
56- 60 F5.3 mag e_C-T1 rms uncertainty on C-T1
61 A1 --- --- [0]
64- 69 F6.3 mag T1-T2 Washington T1-T2 colour index
70 A1 --- --- [0]
74- 78 F5.3 mag e_T1-T2 rms uncertainty on T1-T2
79 A1 --- --- [0]
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Star Cluster
12- 15 I4 pix Xpos X position of cluster centre
17- 20 I4 pix Ypos Y position of cluster centre
22- 23 I2 arcsec r Radius of cluster (2)
25- 26 I2 arcsec e_r rms uncertainty on r
28- 31 F4.2 mag E(B-V) Redenning
33- 36 F4.2 [yr] logt Age
38- 41 F4.2 [yr] e_logt rms uncertainty on Age
43- 46 F4.2 [yr] logtl ? Age from literature
48 I1 --- r_logtl [1/2]? Reference for logtl (1)
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Note (1): References as follows:
1 = Pietrzynski & Udalski (2000, Cat. J/AcA/50/337)
2 = Glatt et al. (2010, Cat. J/A+A/517/A50)
Note (2): the cluster radius is defined as the distance from the cluster
centre where the number of stars equals that of the background.
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Acknowledgements:
Andres Piatti, andres (at)iafe.uba.ar
References:
Piatti, 2011MNRAS.418L..40P 2011MNRAS.418L..40P
(End) Patricia Vannier [CDS] 15-Mar-2012