J/MNRAS/415/1355 UBV(RI)c photometry of NGC 4852 (Ahumada+, 2011)
Early-type stars in the open cluster NGC 4852.
Ahumada J.A., Giorgi E.E., Solivella G., Vazquez R.A.
<Mon. Not. R. Astron. Soc., 415, 1355-1365 (2011)>
=2011MNRAS.415.1355A 2011MNRAS.415.1355A
ADC_Keywords: Clusters, open ; Photometry, UBVRI
Keywords: stars: early-type - stars: emission-line, Be -
open clusters and associations: general -
open clusters and associations: individual: NGC 4852 -
Galaxy: structure
Abstract:
The southern open cluster NGC 4852 was re-observed in the UBVRI
passbands to refine its intrinsic fundamental parameters. An extended
spectral coverage was also undertaken aimed at obtaining a clear
picture of the kind of stars inhabiting the cluster upper main
sequence.
Description:
The field of NGC 4852 was observed at the Cerro Tololo Inter-American
Observatory (CTIO, Chile) with the 1-m (ex YALO, now operated by the
SMARTS Consortium) telescope and the Y4K Camera1 (Y4KCam) of the Ohio
State University. The filters provided include a Johnson-Cousins
BVRI set plus a U+ CuSO4 filter. The cluster was observed on two
nights (2006 April 22-23 and 23-24).
Objects:
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RA (2000) DE Designation(s)
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13 00 09 -59 36.8 NGC 4852 = Cl VDBH 143
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 95 3334 Photometric observations of NGC 4852
table5.dat 57 40 Spectral types in NGC 4852
notes.dat 78 28 Individual notes
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See also:
J/A+A/436/527 : UBVIc photometry of NGC 4852 (Carraro+, 2005)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential number (1)
7- 14 F8.2 pix Xpos ? X position (2)
16- 23 F8.2 pix Ypos ? Y position (2)
25- 30 F6.3 mag Vmag Johnson V magnitude
33- 37 F5.3 mag e_Vmag rms uncertainty on Vmag
39- 44 F6.3 mag B-V ? Johnson B-V colour index
47- 51 F5.3 mag e_B-V ? rms uncertainty on B-V
53- 58 F6.3 mag U-B ? Johnson U-B colour index
61- 65 F5.3 mag e_U-B ? rms uncertainty on U-B
68- 72 F5.3 mag V-Ic ? Johnson-Cousins V-I colour index
75- 79 F5.3 mag e_V-Ic ? rms uncertainty on V-Ic
81- 86 F6.3 mag V-Rc ? Johnson-Cousins V-R colour index
89- 93 F5.3 mag e_V-Rc ? rms uncertainty on V-Rc
95 I1 --- N [1/2]? Number of nights
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Note (1): The five stars numbered from 10001 to 10005 in Fig.1 and listed at
the end of Table 3 deserve a comment. The bright stars 10001 (HD 112852) and
10003 are in the field observed at the CTIO, but they could not be measured
because of saturation; the other three stars are outside the observed region.
Since it was desirable to have photometry of these stars as they are included
in our spectroscopic survey.
Note (2): Scale: 0.289arcsec/pixel. North is up and East is left.
Identified stars (in the text):
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Seq Name RA (J2000) DE (Xpos Ypos)
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1 = HD 112825 13 00 23.89 -59 41 07.56 (-435.21 -928.60)
3 = LS 2867 13 00 45.23 -59 35 53.52 (-995.13 161.55)
4 = CP -58 4630 12 59 56.4 -59 37 37 ( 318.97 117.70)
5 = CP -58 4626 13 22 13.4 -59 13 14 ( 770.53 763.81)
9 = Wray 15-1039 12 59 33.41 -59 35 58.75 ( 895.30 139.25)
21 = CP -58 4632 13 00 10.1 -59 35 37 ( 82.62 361.41)
10001 = HD 112852 13 00 34.30 -59 34 51.72
------------------------------------------------------------------------
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Star sequential number
7- 13 A7 --- SpType MK spectral type
15- 19 F5.2 mag Vmag Johnson V magnitude
21- 25 F5.2 mag E(B-V) B-V colour excess
27- 31 F5.2 mag E(U-B) U-B colour excess
33- 37 F5.2 mag VMAG Absolute V magnitude
39- 43 F5.2 mag MOD Distance modulus (VMAG-Vmag)
45- 48 I4 pc Dist Heliocentric distance
50- 52 I3 pc e_Dist rms uncertainty on Dist
54- 55 A2 --- Rem Remarks (1)
57 A1 --- n_Seq [*] indicates a note in notes.dat file
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Note (1): Remarks on the membership to NGC 4852 ('m', 'm?', 'nm') or to a
farther association ('OB', see Section 5), for stars earlier than A1.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential number
7- 78 A72 --- Note Text of the note
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Feb-2012