J/AJ/155/186 The KMTNet/K2-C9 (Kepler) Data Release (Kim+, 2018)
The KMTNet/K2-C9 (Kepler) Data Release.
Kim H.-W., Hwang K.-H., Kim D.-J., Albrow M.D., Cha S.-M., Chung S.-J.,
Gould A., Han C., Jung Y.K., Kim S.-L., Lee C.-U., Lee D.-J., Lee Y.,
Park B.-G., Pogge R.W., Ryu Y.-H., Shin I.-G., Shvartzvald Y., Yee J.C.,
Zang W., Zhu W., (the KMTNet Collaboration)
<Astron. J., 155, 186-186 (2018)>
=2018AJ....155..186K 2018AJ....155..186K (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; Magnitudes ; Surveys
Keywords: gravitational lensing: micro
Abstract:
We present Korea Microlensing Telescope Network (KMTNet) light curves
for microlensing-event candidates in the Kepler K2 C9 field having peaks
within three effective timescales of the Kepler observations. These
include 181 "clear microlensing" and 84 "possible microlensing" events
found by the KMTNet event finder, plus 56 other events found by OGLE
and/or MOA that were not found by KMTNet. All data for the first two
classes are immediately available for public use without restriction.
Description:
The Korea Microlensing Telescope Network (KMTNet; Kim et al.
2016JKAS...49...37K 2016JKAS...49...37K) supported the K2 C9 campaign in three ways. First,
we altered our observing strategy to temporarily increase the cadence on
the K2 C9 superstamp. This superstamp is covered by two KMTNet fields,
BLG02 and BLG03 (together with their slightly offset counterparts BLG42
and BLG43). Each KMTNet field is 4 deg2. Under our standard observing
protocol for 2016, these two fields were observed at a cadence Γ=4/hr
from each of our three observatories, in Chile (KMTC), South Africa (KMTS),
and Australia (KMTA). However, for all but the final 15 days of K2 C9
(during which Spitzer microlensing began), we increased the cadence at KMTS
and KMTA to Γ=6/hr. That is, the special K2 observing protocol was
in force from April 23 to June 16.
The events presented here were found by applying the KMTNet event finder
to 2016 data that overlap the K2 C9 field and then excluding those events
that peak well outside the K2 C9 window. The KMTNet event finder was
described in detail by Kim et al. (2018AJ....155...76K 2018AJ....155...76K).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 132 265 KMTNet 2016 K2C9 microlensing-event candidates
table2.dat 52 56 Microlensing-event candidates found by OGLE
and/or MOA but not by KMTNet
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See also:
J/A+A/579/A19 : K2 Variable Catalogue (Armstrong+, 2015)
J/MNRAS/456/2260 : K2 Variability Catalogue II (Armstrong+, 2016)
J/PASP/128/L4401 : K2 Campaign 9 added events (Henderson+, 2016)
J/AJ/154/210 : 2015 high-cadence Spitzer microlensing events (Zhu+, 2017)
http://kmtnet.kasi.re.kr/ulens/ : KMTNet website
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Event Event designation (KMT -YYYY-BLG-NNNN in Simbad)
19- 28 A10 --- Field Field designation
30- 31 A2 --- --- [K2]
33- 38 I6 --- K2 [418/106462] K2 star number
40- 47 A8 --- Class Clear or possible microlensing event
49- 58 F10.5 d t0 [7422.52832/7706.26221] Peak time (JD-2450000)
60- 64 F5.2 d teff [1/99.77] Effective timescale (1)
66 I1 --- u0 [0/1] Impact parameter
68- 73 F6.3 mag Imag [14.43/20.981] Baseline I band magnitude
75- 76 I2 h RAh Hour of Right Ascension (J2000)
78- 79 I2 min RAm Minute of Right Ascension (J2000)
81- 85 F5.2 s RAs Second of Right Ascension (J2000)
87 A1 --- DE- Sign of the Declination (J2000)
88- 89 I2 deg DEd Degree of Declination (J2000)
91- 92 I2 arcmin DEm Arcminute of Declination (J2000)
94- 98 F5.2 arcsec DEs Arcsecond of Declination (J2000)
100-121 A22 --- OGLE OGLE microlensing event(s) (OBNNNNNN)
123-129 A7 --- MOA MOA microlensing event (MBNNNNN)
131-132 A2 --- CV Candidate identified as cataclysmic variable
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Note (1): In the usual formulation, the effective timescale is defined as
teff=u0tE, where tE is the Einstein timescale. Then, in the limit
u0->0, the flux evolution goes to
F(t)->fpeak[1+(t-t0)2/teff2]-1/2+fb (Gould 1996ApJ...470..201G 1996ApJ...470..201G).
We directly use this form for the case u0=0, while for the case u0=1, we
have teff=tE.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [KMT-]
5- 8 A4 --- KMT- KMT number (KMT-NNNN)
10- 27 A18 --- Event Event designation (OGLE-YYYY-BLG-NNNN or
MOA-YYYY-BLG-NNN)
29- 30 I2 h RAh Hour of Right Ascension (J2000)
32- 33 I2 min RAm Minute of Right Ascension (J2000)
35- 39 F5.2 s RAs Second of Right Ascension (J2000)
41 A1 --- DE- Sign of the Declination (J2000)
42- 43 I2 deg DEd Degree of Declination (J2000)
45- 46 I2 arcmin DEm Arcminute of Declination (J2000)
48- 52 F5.2 arcsec DEs Arcsecond of Declination (J2000)
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History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 29-Nov-2018