J/AcA/62/219 OGLE: Gaia South Ecliptic Pole Field (Soszynski+, 2012)
The Optical Gravitational Lensing Experiment.
Gaia South Ecliptic Pole Field as seen by OGLE-IV.
Soszynski I., Udalski A., Poleski R., Kozlowski S., Wyrzykowski L.,
Pietrukowicz P., Szymanski M.K., Kubiak M., Pietrzynski G., Ulaczyk K.,
Skowron J.
<Acta Astron., 62, 219-245 (2012)>
=2012AcA....62..219S 2012AcA....62..219S
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry ; Surveys
Keywords: techniques: photometric - astrometry - catalogs -
stars: variables: general -
stars: oscillations (including pulsations) - binaries: eclipsing -
Magellanic Clouds
Abstract:
We present a comprehensive analysis of the Gaia South Ecliptic Pole
(GSEP) field, 5.3 square degrees area around the South Ecliptic Pole
on the outskirts of the LMC, based on the data collected during the
fourth phase of the Optical Gravitational Lensing Experiment, OGLE-IV.
The GSEP field will be observed during the commissioning phase of the
ESA Gaia space mission for testing and calibrating the Gaia
instruments.
We provide the photometric maps of the GSEP region containing the mean
VI photometry of all detected stellar objects and their equatorial
coordinates. We show the quality and completeness of the OGLE-IV
photometry and color-magnitude diagrams of this region.
We conducted an extensive search for variable stars in the GSEP field
leading to the discovery of 6789 variable stars. In this sample we
found 132 classical Cepheids, 686 RR Lyr type stars, 2819 long-period,
and 1377 eclipsing variables. Several objects deserving special
attention were also selected, including a new classical Cepheid in a
binary eclipsing system.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list_map.dat 19 128 List of OGLE-IV maps of the Gaia South Ecliptic
Pole fields
list_hpm.dat 97 50 List of stars with the highest proper motions
(µ>100mas/yr) or parallaxes (π>10mas)
list_pm.dat 88 3253 List of stars with proper motions >20mas/yr
list_gal.dat 64 1924 List of galaxies with their parameters
list_sn.dat 72 11 List of transients with their parameters
list_var.dat 99 6789 List of variable stars with their parameters
remarks.dat 77 116 Remarks for variable stars (list_var.dat)
maps/lmc* . 128 Stars in the maps
phot/* . 11 Individual I light curves of transients objects,
from list_sn.dat
--------------------------------------------------------------------------------
See also:
ftp://ftp.astrouw.edu.pl/ogle/ogle4/GSEP : OGLE-GSEP Home Page
Byte-by-byte Description of file: list_map.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- FileName Name of the file with stars,
in the "maps" subdirectory
15-19 I5 --- Nstars Number of stars in the file
--------------------------------------------------------------------------------
Byte-by-byte Description of files: maps/lmc*
--------------------------------------------------------------------------------
2- 6 I5 --- Seq Sequential number, within the field (KKKKK);
the full name is: LMCNNN.MM.KKKKK (G1)
8- 9 I2 h RAh Right ascension (J2000)
10 A1 --- --- [:]
11- 12 I2 min RAm Right ascension (J2000)
13 A1 --- --- [:]
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
23 A1 --- --- [:]
24- 25 I2 arcmin DEm Declination (J2000)
26 A1 --- --- [:]
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 38 F7.2 pix Xpos X position
40- 46 F7.2 pix Ypos Y position
48- 53 F6.3 mag Vmag ?=99.999 V magnitude
55- 60 F6.3 mag V-I ?=9.999 V-I colour index
62- 67 F6.3 mag Imag ?=99.999 I magnitude
69- 71 I3 --- NgV ?=0 Number of "good" measurements in V band
74 I1 --- NbV [0/2] number of "bad" (removed with 5 sigma
rejection algorithm) measurements in V band
76- 80 F5.3 mag sigV ?=9.999 standard deviation of "good"
measurements in V band
83- 85 I3 --- NgI ?=0 Number of "good" measurements in I band
87- 88 I2 --- NbI [0/10] number of "bad" (removed with 5 sigma
rejection algorithm) measurements in I band
90- 94 F5.3 mag sigI ?=9.999 standard deviation of "good"
measurements in I band
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list_hpm.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- OGLE-IV OGLE-IV star's ID (LMCNNN.MM.KKKKK) (G1)
17 I1 h RAh Right ascension, equinox J2000.0 (hours)
19- 20 I2 min RAm Right ascension, equinox J2000.0 (minutes)
22- 26 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
28 A1 --- DE- Declination, equinox J2000.0 (sign)
29- 30 I2 deg DEd Declination, equinox J2000.0 (degrees)
32- 33 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
35- 38 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
40- 45 F6.3 mag Imag I-band brightness
47- 52 F6.3 mag Vmag ?=99.999 V-band brightness
54- 59 F6.1 mas/yr pmRA Proper motion in R.A. (pmRA*cos(DE)
61- 63 F3.1 mas/yr e_pmRA Uncertainty of proper motion in R.A.
65- 70 F6.1 mas/yr pmDE Proper motion in Dec.
72- 74 F3.1 mas/yr e_pmDE Uncertainty of proper motion in Dec.
77- 81 F5.1 mas/yr pm Total proper motion
83- 85 F3.1 mas/yr e_pm Uncertainty of total proper motion
87- 90 F4.1 mas plx Parallax
92- 94 F3.1 mas e_plx Uncertainty of parallax
96- 97 A2 --- Flag [WD] White dwarf flag
--------------------------------------------------------------------------
Byte-by-byte Description of file: list_pm.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- OGLE-IV OGLE-IV star's ID (LMCNNN.MM.KKKKK) (G1)
17 I1 h RAh Right ascension, equinox J2000.0 (hours) (1)
19- 20 I2 min RAm Right ascension, equinox J2000.0 (minutes)
22- 26 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
28 A1 --- DE- Declination, equinox J2000.0 (sign) (1)
29- 30 I2 deg DEd Declination, equinox J2000.0 (degrees)
32- 33 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
35- 38 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
40- 45 F6.3 mag Imag I-band brightness
47- 52 F6.3 mag Vmag ?=99.999 V-band brightness
54- 59 F6.1 mas/yr pmRA Proper motion in R.A. (pmRA*cos(DE))
61- 64 F4.1 mas/yr e_pmRA Statistical uncertainty of pmRA*cos(DE)
66- 71 F6.1 mas/yr pmDE Proper motion in Dec.
73- 76 F4.1 mas/yr e_pmDE Statistical uncertainty of pmDE
79- 83 F5.1 mas/yr pm Total proper motion
85- 88 F4.1 mas/yr e_pm Uncertainty of total proper motion
--------------------------------------------------------------------------------
Note (1): equatorial coordinates copied from photometric maps
(ftp://ftp.astrouw.edu.pl/ogle/ogle4/GSEP/maps/ directory).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list_gal.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [OGLE-]
6- 24 A19 --- ID Identification of galaxy (GALAXY-LMCNNN.NN.NN)
26- 27 I2 h RAh Right ascension, equinox J2000.0 (hours)
29- 30 I2 min RAm Right ascension, equinox J2000.0 (minutes)
32- 36 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
38 A1 --- DE- Declination, equinox J2000.0 (sign)
39- 40 I2 deg DEd Declination, equinox J2000.0 (degrees)
42- 43 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
45- 48 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
50- 58 A9 --- Field OGLE-IV field (LMCNNN.NN)
60- 64 F5.2 mag Imag I-band magnitude
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list_sn.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [OGLE-]
6- 16 A11 --- ID Identification of supernova (YYYY-SN-NNN)
18- 32 A15 --- OGLE-IV OGLE-IV object ID (LMCNNN.MM.KKKKK) (G1)
34- 35 I2 h RAh Right ascension, equinox J2000.0 (hours)
37- 38 I2 min RAm Right ascension, equinox J2000.0 (minutes)
40- 44 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
46 A1 --- DE- Declination, equinox J2000.0 (sign)
47- 48 I2 deg DEd Declination, equinox J2000.0 (degrees)
50- 51 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
53- 56 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
59- 63 F5.2 mag Imag I-band magnitude at maximum brightness
66- 72 I7 d JD Julian Day at maximum brightness
--------------------------------------------------------------------------
Byte-by-byte Description of file: phot/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.5 d HJD Heliocentric Julian Day (HJD-2450000)
12- 17 F6.3 mag Imag I-band magnitude
19- 23 F5.3 mag e_Imag Uncertainty of magnitude
--------------------------------------------------------------------------
Byte-by-byte Description of file: list_var.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- OGLE-IV Star's ID (LMCNNN.MM.KKKKK) (G1)
18- 19 I2 h RAh Right ascension, equinox J2000.0 (hours)
21- 22 I2 min RAm Right ascension, equinox J2000.0 (minutes)
24- 28 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
30 A1 --- DE- Declination, equinox J2000.0 (sign)
31- 32 I2 deg DEd Declination, equinox J2000.0 (degrees)
34- 35 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
37- 40 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
42- 46 A5 --- Vtype Variability type (2)
48- 52 A5 --- Stype Subtype or secondary variability type (3)
55- 60 F6.3 mag <Imag> Intensity mean I-band magnitude
62- 67 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
68 A1 --- n_<Vmag> [*] Note for LMC562.28.10733 <Vmag> (1)
69- 80 F12.7 d Per ? Period (if available)
82- 86 F5.3 mag Iamp ? I-band amplitude (for periodic variables)
88- 99 F12.7 d Per2 ? Secondary period (if available)
--------------------------------------------------------------------------------
Note (1): For LMC562.28.10733, in original file, <Vmag≥246.984, and
light curve have Vmag around 2 mag.
Note (2): variability types as follows:
DCEP = classical (δ) Cepheid
T2CEP = type-II Cepheid
ACEP = anomalous Cepheid
RRLYR = RR Lyr-type star (subtypes in Stype)
DSCT = δ Scuti variable
ECL = Eclipsing binary
ELL = Ellipsoidal variable
LPV = Long-period variable
OTHER = other variables
Note (3): variable subtypes (RRab, RRc, RRd, Mira, RVTau, ...) and also:
F/1O/2O = Fundamental / First overtone / Second overtone
DPV = Double Periodic Variable
SRV = Semi-Regular Variable
OSARG = OGLE Small Amplitude Red Giant
Spots = Spotted star
--------------------------------------------------------------------------------
Byte-by-byte Description of file: remarks.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- OGLE-IV Star's ID (LMCNNN.MM.KKKKK)
20- 77 A58 --- Rem Remark
--------------------------------------------------------------------------------
Global notes:
Note (G1): LMCNNN.MM.KKK, where NNN is the field number, MM indicates the
CCD chip number of the mosaic camera, and KKK is the star number in
the OGLE-IV database.
--------------------------------------------------------------------------------
History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle4/GSEP/
(End) Patricia Vannier [CDS] 28-Mar-2013