J/MNRAS/420/585 AKARI observations of SMC Cepheids (Ngeow+, 2012)
Period-luminosity relations for Small Magellanic Cloud Cepheid based on
AKARI archival data.
Ngeow C.-C., Citro D.M., Kanbur S.M.
<Mon. Not. R. Astron. Soc., 420, 585-589 (2012)>
=2012MNRAS.420..585N 2012MNRAS.420..585N
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry
Keywords: stars: variables: Cepheids - distance scale
Abstract:
In this work we matched the AKARI archival data to the Optical
Gravitational Lensing Experiment III (OGLE-III) catalogue to derive
the mid-infrared period-luminosity (PL) relations for Small
Magellanic Cloud (SMC) Cepheids. Mismatched AKARI sources were
eliminated using random-phase colours obtained from the full I-band
light curves from OGLE-III. It was possible to derive PL relations in
the N3 and N4 bands only, although the S7-, S11-, L15-
and L24-band data were also tested. Random-phase correction was
included when deriving the PL relation in the N3 and N4 bands
using the available time of observations from AKARI data. The
final adopted PL relations were N3=-3.370logP+16.527
and N4=-3.402logP+16.556. However, these PL relations may
be biased due to the small number of Cepheids in the sample.
Description:
The AKARI data used in this work is based on the SMC bright point
source catalogue presented in Ita et al. (2010, Cat. J/PASJ/62/273).
Photometry in 3.2um (N3, 12899 sources), 4.1um (N4, 9748 sources), 7um
(S7, 1838 sources), 11um (S11, 1045 sources), 15um (L15, 479 sources)
and 24um (L24, 356 sources) bands provided from the AKARI catalogue.
This catalogue was matched to the Optical Gravitational Lensing
Experiment III (OGLE-III) SMC fundamental mode (FU) Cepheid catalogue
from Soszynski et al. (2010, Cat. J/AcA/60/17).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 97 Photometry of the AKARI sources matched to
OGLE-III SMC catalogue
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See also:
J/PASJ/62/273 : AKARI SMC photometry (Ita+, 2010)
J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- --- [OGLE-SMC-CEP-]
14- 17 I4 --- Star Name of Cepheid from OGLE-III LMC catalog,
OGLE SMC-CEP-NNNN in Simbad
19- 20 A2 --- Band [N3 N4] AKARI bands (N3=3.19±0.87µ,
N4=4.33±1.53µm)
22- 30 F9.6 d Per Period in days
32- 45 F14.6 d Obs Time of observation from AKARI catalog (JD)
47- 52 F6.3 mag mag Magnitude from AKARI catalog in Band
54- 58 F5.3 mag e_mag Magnitude error from AKARI catalog
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Jul-2012