J/MNRAS/358/341 Ic photometry of IC 348 (Littlefair+, 2005)
Do accretion discs regulate the rotation of young stars?
Littlefair S.P., Naylor T., Burningham B., Jeffries R.D.
<Mon. Not. R. Astron. Soc., 358, 341-352 (2005)>
=2005MNRAS.358..341L 2005MNRAS.358..341L
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, Cousins
Keywords: accretion, accretion discs - planetary systems: protoplanetary discs -
stars: pre-main-sequence
Abstract:
We present a photometric study of I-band variability in the young
cluster IC 348. The main purpose of the study was to identify periodic
stars. In all, we find 50 periodic stars, of which 32 were previously
unknown. For the first time in IC 348, we discover periods in
significant numbers of lower-mass stars (M<0.25M☉) and classical
T Tauri stars.
Description:
Royal Greenwich Observatory I-band CCD images were taken with the CCD
imager on the Jacobus Kapteyn Telescope (JKT) on La Palma, equipped
with a single 2048 2048 pixel SITe array. A single field, centred on
IC 348 (RA=03:44:28.5, DE=+32:08:36, J2000) was observed, with data
being taken on every night between 2002 December 28/29 and 2003
January 9/10, with additional imaging on the nights beginning 2003
January 19-22.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ic348.dat 71 292 Ic photometry
table1.dat 45 50 Periodic variables in IC 348
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See also:
J/AJ/127/1602 : Cousins RI photometry in IC 348 (Cohen+, 2004)
J/MNRAS/335/291 : BVI photometry of NGC 2547 (Naylor+, 2002)
J/AJ/122/866 : X-ray sources in IC 348 from Chandra (Preibisch+, 2001)
J/ApJ/497/736 : The young cluster IC 348 (Herbig, 1998)
J/A+A/324/549 : Deep UVBRI photometry in IC 348 (Trullols+ 1997)
Byte-by-byte Description of file: ic348.dat
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Bytes Format Units Label Explanations
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1- 4 F4.2 --- Field [3.00] Field number
6- 8 I3 --- LNB Sequential number, Cl* IC 348 LNB NNN in Simbad
11- 12 I2 h RAh Right ascension (J2000.0)
14- 15 I2 min RAm Right ascension (J2000.0)
17- 22 F6.3 s RAs Right ascension (J2000.0)
24 A1 --- DE- Declination sign (J2000.0)
25- 26 I2 deg DEd Declination (J2000.0)
28- 29 I2 arcmin DEm Declination (J2000.0)
31- 35 F5.2 arcsec DEs Declination (J2000.0)
37- 44 F8.3 pix Xpos X position in the CCD image
46- 53 F8.3 pix Ypos Y position in the CCD image
55- 61 F7.3 mag Icmag ?=112 Cousins I magnitude (>112 means no value)
63- 68 F6.3 mag e_Icmag ?=89.824 rms uncertainty on Icmag
70- 71 A2 --- n_Icmag Note on Icmag (1)
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Note (1): The flags are two character strings.
Each character is the flag for one of the two filters which went to
making up the colour. For simple magnitudes, one flag is for the
filter for that magnitude, the other flag is for the other filter
which was used for the colour term. The order of the flags is the same
as the order of the colour, thus for B-V the B flag comes first and
the V flag second. The flags are:
O = O.K.
E = Too close to CCD edge
I = Ill-determined background
R = Uncalibrated region
V = Variable
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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 --- LNB Sequential number, Cl* IC 348 LNB NNN in Simbad
5- 7 I3 --- HMW ? Herbst et al. (2000AJ....120..349H 2000AJ....120..349H) number,
(Cl* IC 348 HMW NNN in Simbad)
9- 13 F5.2 d Per Period
15- 20 F6.3 mag Icmag Cousins I magnitude
22- 26 F5.2 --- chi2 chi2 value, determined with respect to the
best-fitting sinusoid.
28- 32 A5 --- SpType MK spectral type
35- 39 F5.1 0.1nm EWHa ?=0.0 Hα equivalent width
41- 44 F4.2 solMass Mass ? Mass
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History: Copied at
http://www.astro.ex.ac.uk/people/timn/Catalogues/description.html
(End) Patricia Vannier [CDS] 28-Apr-2005