J/MNRAS/419/2233 HD 80606 transits (Colon+, 2012)
Probing potassium in the atmosphere of HD 80606b with tunable filter transit
spectrophotometry from the Gran Telescopio Canarias.
Colon K.D., Ford E.B., Redfield S., Fortney J.J., Shabram M., Deeg H.J.,
Mahadevan S.
<Mon. Not. R. Astron. Soc., 419, 2233-2250 (2012)>
=2012MNRAS.419.2233C 2012MNRAS.419.2233C
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: techniques: photometric - stars: individual: HD 80606 -
planetary systems
Abstract:
We report observations of HD 80606 using the 10.4-m Gran Telescopio
Canarias and the Optical System for Imaging and low Resolution
Integrated Spectroscopy (OSIRIS) tunable filter imager. We acquired
very high precision, narrow-band photometry in four bandpasses around
the KI absorption feature during the 2010 January transit of
HD 80606b and during out-of-transit observations conducted in 2010
January and April. We obtained differential photometric precisions of
∼2.08x10-4 for the in-transit flux ratio measured at 769.91nm,
which probes the KI line core.
Description:
HD 80606 and its nearby companion (HD 80607) are both bright G5
dwarves of a similar magnitude (V∼9) and colour. On three nights, we
measured the flux of both HD 80606 (target) and HD 80607 (reference)
simultaneously. We cycled through a set of four wavelengths throughout
the observations. On the night of 2010 January 13-14, the planet was
in transit for the duration of our observations, and we measure an
`in-transit' flux ratio of HD 80606 to HD 80607 for each wavelength.
We repeated the observations on 2010 January 15 and 2010 April 4, when
the planet was not transiting HD 80606, allowing us to measure the
"out-of-transit" (OOT) flux ratio of HD 80606 to HD 80607 for each
wavelength.
Objects:
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RA (2000) DE Designation(s)
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09 22 37.57 +50 36 13.5 HD 80606 = HIP 45982
09 22 39.73 +50 36 13.9 HD 80607 = HIP 45983
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 1998 Absolute Transit Photometry from 2010-01-13
table2.dat 38 357 Absolute OOT Photometry from 2010-04-04
table3.dat 35 1998 Relative Transit Photometry
table4.dat 43 938 Normalized photometry from around mid-transit
table5.dat 46 357 Relative OOT Photometry from 2010-04-04
table8.dat 35 322 Absolute OOT Photometry from 2010-01-15
table9.dat 43 322 Relative OOT Photometry from 2010-01-15
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Byte-by-byte Description of file: table1.dat table8.dat
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Bytes Format Units Label Explanations
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1- 6 F6.2 nm lambda Wavelength (1)
8- 19 F12.4 d HJD Heliocentric Julian date (2)
21- 27 I7 --- F06 Absolute flux measurements of HD 80606
29- 35 I7 --- F07 Absolute flux measurements of HD 80607
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Note (1): For table1, the wavelengths included in the table are the observed
wavelengths in the frame of the planet, i.e. 768.76, 769.91, 773.66 and 777.36.
For table8, the wavelengths included in the table are the wavelengths as
observed from the GTC, i.e. 768.60, 769.75, 773.50 and 777.20.
See text for additional details.
Note (2): The time stamps included here are for the times at mid-exposure.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.2 nm lambda Wavelength (1)
8- 9 I2 s Texp Exposure time (2)
11- 22 F12.4 d HJD Heliocentric Julian date
24- 30 I7 --- F06 Absolute flux measurements of HD 80606
32- 38 I7 --- F07 Absolute flux measurements of HD 80607
--------------------------------------------------------------------------------
Note (1): the wavelengths included in the table are the wavelengths as observed
from the GTC, i.e. 768.86, 770.00, 773.76 and 777.45. See text for additional
details.
Note (2): exposure time for the observations, as observations based on two
different exposure times were included in our analysis.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.2 nm lambda Wavelength (1)
8- 19 F12.4 d HJD Heliocentric Julian date (2)
21- 27 F7.5 --- Fratio Relative flux ratio between the target
(HD 80606) and reference star (HD 80607)
29- 35 F7.5 --- e_Fratio rms uncertainty on Fratio
--------------------------------------------------------------------------------
Note (1): The wavelengths included in the table are the observed wavelengths in
the frame of the planet, i.e. 768.76, 769.91, 773.66 and 777.36. See text for
additional details.
Note (2): The time stamps included here are for the times at mid-exposure.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.2 nm lambda Wavelength (1)
8- 19 F12.4 d HJD Heliocentric Julian date (2)
21- 27 F7.5 --- Fratio Raw relative flux ratio between the target
(HD 80606) and reference star (HD 80607) (3)
29- 35 F7.5 --- Fratioc Corrected relative flux ratio between the
target and reference star (3)
37- 43 F7.5 --- e_Fratio rms uncertainty on Fratio
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Note (1): For table4, the wavelengths included in the table are the observed
wavelengths in the frame of the planet, i.e. 768.76, 769.91, 773.66 and 777.36.
For table9, the wavelengths included in the table are the wavelengths as
observed from the GTC, i.e. 768.60, 769.75, 773.50 and 777.20.
See text for additional details.
Note (2): The time stamps included here are for the times at midexposure.
Note (3): The flux ratios are presented both before (raw) and after (corrected)
EPD was applied. The flux ratios have also been normalized to the weighted
mean OOT (out-of-transit) flux ratio (see Table 6 and text for more details).
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 F6.2 nm lambda Wavelength (1)
8- 9 I2 s Texp Exposure time
11- 22 F12.4 d HJD Heliocentric Julian date (2)
24- 30 F7.5 --- Fratio Raw relative flux ratio between the target
and reference star (3)
32- 38 F7.5 --- Fratioc Corrected relative flux ratio between the
target and reference star(3)
40- 46 F7.5 --- e_Fratio rms uncertainty on Fratio
--------------------------------------------------------------------------------
Note (1): The wavelengths included in the table are the wavelengths as observed
from the GTC, i.e. 768.86, 770.00, 773.76 and 777.45. See text for additional
details.
Note (2): The time stamps included here are for the times at mid-exposure.
Note (3): The flux ratios are presented both before (raw) and after (corrected)
EPD was applied.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Jul-2012