J/AJ/130/1194 UBV photometry in Ruprecht 91 (Turner+, 2005)
The open cluster Ruprecht 91 and its Cepheids.
Turner D.G., Forbes D., Van Den Bergh S., Younger P.F., Berdnikov L.N.
<Astron. J., 130, 1194-1205 (2005)>
=2005AJ....130.1194T 2005AJ....130.1194T
ADC_Keywords: Stars, variable ; Clusters, open ; Photometry, UBV
Keywords: Cepheids - dust, extinction -
open clusters and associations: individual (Ruprecht 91) -
stars: evolution
Abstract:
Photoelectric UBV photometry and star counts are presented for stars
in the previously unstudied open cluster Ruprecht 91, supplemented by
observations for stars in adjacent regions surrounding the Cepheids
SX Car and VY Car, including new observations for the latter.
Ruprecht 91 is typical of groups associated with Cepheids, with an
evolutionary age of ∼8x107yr, but it is only 980±8pc distant, much
closer than the Cepheids.
Description:
Photoelectric UBV photometry was obtained for stars in Ruprecht 91 and
nearby fields in 1981 April-May and 1984 April using the University of
Toronto's 0.6m Helen Sawyer Hogg Telescope at the Las Campanas
Observatory of the Carnegie Institution of Washington.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
10 44 32.7 -57 33 55 VY Car = AAVSO 1040-57
10 46 05.8 -57 32 51 SX Car = AAVSO 1042-57
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 67 49 Photoelectric UBV data for Ruprecht 91 stars
table2.dat 70 35 Photoelectric UBV data for stars near VY Car
and SX Car
table5.dat 49 66 Observed-computed data for VY Carinae
table6.dat 48 32 Observed-computed data for SX Carinae
refs.dat 101 25 References
--------------------------------------------------------------------------------
See also:
J/A+AS/145/365 : BVI photometry of NGC 7790 (Gupta+, 2000)
Byte-by-byte Description of file: table1.dat table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/84] Star name
(<[TFV2005] NN> in Simbad)
4- 5 I2 h RAh Hour of Right Ascension (J2000)
7- 8 I2 min RAm Minute of Right Ascension (J2000)
10- 13 F4.1 s RAs Second of Right Ascension (J2000)
15 A1 --- DE- Sign of the Declination (J2000)
16- 17 I2 deg DEd Degree of Declination (J2000)
19- 20 I2 arcmin DEm Arcminute of Declination (J2000)
22- 23 I2 arcsec DEs Arcsecond of Declination (J2000)
25- 29 F5.2 mag Vmag The V band magnitude
31- 35 F5.2 mag B-V The (B-V) color index
37- 41 F5.2 mag U-B ? The (U-B) color index
43- 44 I2 --- o_Vmag Number of observations
46- 70 A25 --- n_Seq Additional notes on star (1)
--------------------------------------------------------------------------------
Note (1): "m" indicates a likely cluster member.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.3 --- HJDmax Observed heliocentric Julian date of maximum
13- 17 I5 --- Cycle Elapsed cycle
19- 29 F11.3 --- HJDcal Calculated heliocentric Julian date of maximum
31- 37 F7.3 --- (O-C)HJD Difference between observed and computed dates
of maximum
39- 41 F3.1 --- w_(O-C)HJD Weight
43- 45 I3 --- o_(O-C)HJD Number of data points
47- 48 I2 --- r_(O-C)HJD Data source (detailed in refs.dat)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- Bibcode Bibcode
24- 43 A20 --- Aut Author's name
45-101 A57 --- Com Comment
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 16-Nov-2005