J/AJ/132/1783 UBVRI polarimetry of 25 stars in NGC 6611 (Orsatti+, 2006)
Polarimetry in the outskirts of NGC 6611.
Orsatti A.M., Vega E.I., Marraco H.G.
<Astron. J., 132, 1783-1788 (2006)>
=2006AJ....132.1783O 2006AJ....132.1783O
ADC_Keywords: Clusters, open ; Photometry, UBVRI
Keywords: dust, extinction - techniques: polarimetric -
open clusters and associations: individual (NGC 6611)
Abstract:
We present new polarimetric UBVRI observations of 25 stars in the
direction of the halo of NGC 6611, the rich stellar open cluster
embedded in an ionized hydrogen complex (M16). Our plan is to
characterize the interstellar material (ISM) associated with halo
stars in order to make a comparison with the ISM dusty core
characteristics that resulted from a previous investigation by the
same authors.
Description:
Observations in the UBV(RI)KC bands (Kron-Cousins;
λUeff=0.36um, FWHM=0.05um; λVeff=0.44um, FWHM=0.06um;
λVeff=0.53um, FWHM=0.06um; λReff=0.69um, FWHM=0.18um;
λIeff=0.83um, FWHM=0.15um) were carried out using the
five-channel photopolarimeter of the Torino Astronomical Observatory
attached to the 2.15m telescope at the Complejo Astronomico El
Leoncito (San Juan, Argentina). They were performed on three nights
(June 14-16) in 2002 and one night (May 29) in 2003.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 45 25 Star list
table1.dat 47 125 Polarimetric observations in NGC 6611
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See also:
J/AJ/106/1906 : NGC 6611: A Cluster Caught in the Act (Hillenbrand+ 1993)
J/A+AS/121/223 : Multiphotometry of NGC 6611 (de Winter+ 1997)
J/A+AS/134/525 : NGC 6611 compiled catalog (Belikov+ 1999)
J/A+A/395/823 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2002)
J/A+A/437/467 : VLT-FLAMES survey of massive stars (Evans+, 2005)
J/A+A/457/265 : The VLT-FLAMES Survey of Massive Stars (Dufton+, 2006)
J/A+A/462/245 : BVI photometry in NGC 6611 (Guarcello+, 2007)
J/A+AS/144/195 : UBVRI polarimetric observations in NGC 6611 (Orsatti+, 2000)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Star number from Walker (1961ApJ...133..438W 1961ApJ...133..438W),
NGC 6611 NNN in Simbad
5- 6 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
8- 9 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
11- 14 F4.1 s RAs Simbad Second of Right Ascension (J2000.0)
16 A1 --- DE- Simbad Sign of the Declination (J2000.0)
17- 18 I2 deg DEd Simbad Degree of Declination (J2000.0)
20- 21 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
23- 24 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
28- 32 F5.2 mag Bmag ? Simbad B band magnitude
34- 38 F5.2 mag Vmag Simbad V band magnitude
40- 45 A6 --- SpType Simbad MK spectral type
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Star number from Walker (1961ApJ...133..438W 1961ApJ...133..438W),
NGC 6611 NNN in Simbad
4 A1 --- f_Seq [*] * = non-member
6- 22 A17 --- Name The HD/BD/H designation(s) (1)
24 A1 --- Filt [UBVRI] Filter used in the observation
26- 29 F4.2 % Pol ? Percent polarization in Filt
31- 34 F4.2 % e_Pol ? Error in Pol
36- 40 F5.1 deg PA ? Position angle of electric vector
42- 45 F4.1 deg e_PA ? Error on PosAng
47 I1 --- Nint Number of 60 secondes integrations
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Note (1): HD/BD/H designation(s):
H = Hoag et al. (1961PUSNO..17..343H 1961PUSNO..17..343H),
Cl* NGC NNNN Hoag NN in Simbad
HD = Henry Draper, Cat. III/135
BD = Bonner Durchmusterung, Cat. I/122
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 23-Jul-2008