J/MNRAS/481/4206 IRSF survey of variable stars in the SMC (Ita+, 2018)
A near-infrared variable star survey in the Magellanic Clouds: the
Small Magellanic Cloud data.
Ita Y., Matsunaga N., Tanabe T., Nakada Y., Kato D., Nagayama T.,
Nagashima C., Kurita M., Nakajima Y., Whitelock P.A., Menzies J.W.,
Feast M.W., Nagata T., Tamura M., Nakaya H.
<Mon. Not. R. Astron. Soc., 481, 4206-4220 (2018)>
=2018MNRAS.481.4206I 2018MNRAS.481.4206I (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable; Photometry, infrared; Magellanic Clouds; Surveys
Keywords: stars: AGB and post-AGB - Magellanic Clouds - infrared: stars
Abstract:
A very long-term near-infrared variable star survey towards the Large
and Small Magellanic Clouds (LMC and SMC) was carried out using the
1.4m InfraRed Survey Facility at the South African Astronomical
Observatory. This project was initiated in 2000 December in the LMC,
and in 2001 July in the SMC. Since then an area of 3deg2 along the
bar in the LMC and an area of 1deg2 in the central part of the SMC
have been repeatedly observed. This survey is ongoing, but results
obtained with data taken until 2017 December are reported in this
paper. Over more than 15yr we have observed the two survey areas more
than one hundred times. This is the first survey that provides
near-infrared time-series data with such a long time baseline and on
such a large scale. This paper describes the observations in the SMC
and publishes a point source photometric catalogue, a variable source
catalogue, and time-series data.
Description:
We have repeatedly observed a total area of 3deg2 along the LMC bar
since 2000 December, and a total area of 1deg2 around the SMC centre
since 2001 July with the 1.4m telescope InfraRed Survey Facility
(IRSF) situated at the SAAO Sutherland station and equipped with the
SIRIUS camera. The observations were made simultaneously in three
wavebands J (1.25um), H (1.63um), and Ks (2.14um). These filters are
similar to the Mauna Kea Observatories (MKO) NIR photometric system.
In this paper we present data obtained up to 2017 December.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 96 389044 Point source catalog
variab.dat 310 1063 Variable source catalog
lcs/* . 3061 Individual time-series in J, H and Ks bands
in ASCII format
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See also:
I/221 : The Magellanic Catalogue of Stars - MACS (Tucholke+ 1996)
II/228 : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/288 : IRSF Magellanic Clouds Point Source Catalog (Kato+ 2007)
II/305 : SAGE LMC and SMC IRAC Source Catalog (IPAC 2009)
II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/99/784 : IR photometry of LMC long-period variables (Hughes+ 1990)
J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998)
J/AcA/51/317 : OGLE DIA. Catalog of LMC and SMC images (Zebrun+, 2001)
J/AcA/52/143 : OGLE high proper motion stars towards MC (Soszynski+, 2002)
J/AJ/123/855 : Magellanic Clouds Photometric Survey: SMC (Zaritsky+, 2002)
J/AJ/132/2268 : SAGE calibration stars (Meixner+, 2006)
J/AJ/137/3139 : LMC SAGE. New variable evolved stars and YSOs (Vijh+, 2009)
J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)
J/PASJ/62/273 : AKARI SMC photometry (Ita+, 2010)
J/AcA/61/199 : OGLE3 Magellanic Clouds High PM stars (Poleski+, 2011)
J/AcA/61/217 : VI LCs of SMC long-period variables (Soszynski+, 2011)
J/AJ/142/103 : Cool evolved stars in SAGE-SMC and SAGE-LMC (Boyer+, 2011)
J/AJ/144/179 : AKARI-LMC Point-source catalog (Kato+, 2012)
J/A+A/573/A100 : WFCAM Variable Star Catalog (Ferreira Lopes+, 2015)
J/AJ/149/78 : Candidate IR variables from SAGE-SMC survey (Polsdofer+, 2015)
J/ApJS/224/21 : The VMC survey. XIX. Classical Cepheids in SMC (Ripepi+, 2016)
J/MNRAS/473/3131 : VMC survey. XXVI. SMC RR Lyrae stars (Muraveva+, 2018)
Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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2- 10 F9.6 deg RAdeg [11.97/15.53] Right ascension (J2000)
12- 21 F10.6 deg DEdeg [-73.4/-72.3] Declination (J2000)
23- 28 F6.3 mag Jmag [9.6/20.4]?=99.999 J-band calibrated magnitude
30- 35 F6.3 mag e_Jmag [0.002/0.6]?=99.999 Uncertainty on Jmag
37- 42 F6.3 mag JmagEC [0.001/0.003]?=99.999 Error in the calibration
offset in J-band
44 I1 --- DetJ [0/1] Flag for multiple detection in J-band (1)
46 I1 --- ProxJ [0/1] Flag for proximity in J-band (G1)
48- 53 F6.3 mag Hmag [9.6/20.11]?=99.999 H-band calibrated magnitude
55- 60 F6.3 mag e_Hmag [0.003/0.6]?=99.999 Uncertainty on Hmag
62- 67 F6.3 mag HmagEC [0.001/0.002]?=99.999 Error in the calibration
offset in H-band
69 I1 --- DetH [0/1] Flag for multiple detection in H-band (1)
71 I1 --- ProxH [0/1] Flag for proximity in H-band (G1)
73- 78 F6.3 mag Ksmag [9/19.1]?=99.999 Ks-band calibrated magnitude
80- 85 F6.3 mag e_Ksmag [0.002/0.6]?=99.999 Uncertainty on Ksmag
87- 92 F6.3 mag KsmagEC [0.001/0.002]?=99.999 Error in the calibration
offset in Ks-band
94 I1 --- DetKs [0/1] Flag for multiple detection in Ks-band (1)
96 I1 --- ProxKs [0/1] Flag for proximity in Ks-band (G1)
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Note (1): The multiple detection flag is set to 1 if the source is detected
in more than 1 field of view, and 0 otherwise.
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Byte-by-byte Description of file: variab.dat
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Bytes Format Units Label Explanations
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1- 9 F9.6 deg RAdeg [11.98/15.51] Mean right ascension (J2000)
11- 20 F10.6 deg DEdeg [-73.4/-72.3] Mean declination (J2000)
22- 28 F7.3 --- JmagSD [0.015/1.2]?=-99.999 Jmag standard deviation
30- 36 F7.3 --- HmagSD [0.014/0.9]?=-99.999 Hmag standard deviation
38- 44 F7.3 --- KsmagSD [0.007/0.6]?=-99.999 Ksmag standard deviation
46- 53 F8.4 --- Ipfc [0.0003/1.1]?=-99.9999 Ferreira Lopes
variability index Ipfc
55- 61 F7.3 --- Ifi [0.26/0.94]?=-99.999 Ferreira Lopes
variability index Ifi
63- 69 F7.3 --- VarJH [0.16/191.3]?=-99.999 Stetson variability
index J,HJWS
71- 77 F7.3 --- VarHKs [0.08/157.7]?=-99.999 Stetson variability
index H,KsJWS
79- 85 F7.3 --- VarJKs [0.08/132.1]?=-99.999 Stetson variability
index J,ksJWS
87- 96 F10.6 deg RAJdeg [11.99/15.51]?=999.999999 Right ascension on
the J-band photometric reference image (J2000)
98- 107 F10.6 deg DEJdeg [-73.4/-72.3]?=999.999999 Declination on the
J-band photometric reference image (J2000)
109- 114 F6.3 mag Jmag [9.8/18.91]?=99.999 J-band magnitude
116- 121 F6.3 mag e_Jmag [0.003/0.21]?=99.999 Uncertainty on Jmag
123- 128 F6.3 mag JmagEC [0.001/0.003]?=99.999 Error in the
calibration offset in J-band
130 I1 --- ProxJ [0/1] Proximity flag in J-band (G1)
132- 156 A25 --- FileJ Name of the J-band time-series data file
in subdirectory lcs
158- 160 I3 --- o_Jmag [0/162] Number of available exposures for
Jmag
162- 171 F10.6 deg RAHdeg [11.98/15.51]?=999.999999 Right ascension on
the H-band photometric reference image (J2000)
173- 182 F10.6 deg DEHdeg [-73.4/72.3]?=999.999999 Declination on the
H-band photometric reference image (J2000)
184- 189 F6.3 mag Hmag [9.7/17.6]?=99.999 H-band magnitude
191- 196 F6.3 mag e_Hmag [0.003/0.2]?=99.999 Uncertainty on the Hmag
198- 203 F6.3 mag HmagEC [0.001/0.002]?=99.999 Error in the
calibration offset in H-band
205 I1 --- ProxH [0/1] Proximity flag in H-band (G1)
207- 231 A25 --- FileH Name of the H-band time-series data file
in subdirectory lcs
233- 235 I3 --- o_Hmag [0/159] Number of available exposures for
Hmag
237- 246 F10.6 deg RAKdeg [11.98/15.51]?=999.999999 Right ascension on
the Ks-band photometric reference image
(J2000)
248- 257 F10.6 deg DEKdeg [-73.4/-72.3]?=999.999999 Declination on the
Ks-band photometric reference image (J2000)
259- 264 F6.3 mag Ksmag [9.4/17.8]?=99.999 Ks-band magnitude
266- 271 F6.3 mag e_Ksmag [0.003/0.2]?=99.999 Uncertainty on the Ksmag
273- 278 F6.3 mag s_Ksmag [0.001/0.002]?=99.999 Error in the
calibration offset in Ks-band
280 I1 --- ProxKs [0/1] Proximity flag in Ks-band (G1)
282- 306 A25 --- FileKs Name of the Ks-band time-series data file
in subdirectory lcs
308- 310 I3 --- o_Ksmag [0/159] Number of available exposures for
Ksmag
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Byte-by-byte Description of file: lcs/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d HJD Heliocentric Julian Day of observation
16- 21 F6.3 mag mag ?=99.999 Calibrated magnitude in filter
given in the File name
23- 28 F6.3 mag e_mag ?=99.999 mag uncertainty (1)
31- 35 F5.3 mag s_mag Total systematic error in mag (2)
37- 49 A13 --- Reg Name of region and field of view
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Note (1): The error of the time-series magnitude calculated by the differential
image analysis ediff.
Note (2): The total systematic error computed from errors in the reference
magnitude and calibration offset esys.
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Global notes:
Note (G1): The proximity flag is set to 1 if there are nearby sources
within a radius of 3 arcsec.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 17-Mar-2021