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J/MNRAS/446/411 V lightcurves of J1407 from PROMPT-4 and ROAD (Kenworthy+, 2015)

Mass and period limits on the ringed companion transiting the young star J1407. Kenworthy M.A., Lacour S., Kraus A., Triaud A.H.M.J., Mamajek E.E., Scott E.L., Segransan D., Ireland M., Hambsch F.-J., Reichart D.E., Haislip J.B., LaCluyze A.P., Moore J.P., Frank N.R. <Mon. Not. R. Astron. Soc., 446, 411-427 (2015)> =2015MNRAS.446..411K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence ; Photometry, VRI ; Binaries, eclipsing Keywords: planets and satellites: formation - planets and satellites: rings - binaries: eclipsing - stars: individual: 1SWASP J140747.93-394542.6 (ASAS J140748-3945.7) - planetary systems Abstract: The young (∼16 Myr) pre-main-sequence star in Sco-Cen 1SWASP J140747.93-394542.6, hereafter referred to as J1407, underwent a deep eclipse in 2007 April, bracketed by several shallower eclipses in the surrounding 54d. This has been interpreted as the first detection of an eclipsing ring system circling a substellar object (dubbed J1407b). We report on a search for this companion with Sparse Aperture Mask imaging and direct imaging with both the UT4 VLT and Keck telescopes. Radial velocity measurements of J1407 provide additional constraints on J1407b and on short period companions to the central star. Follow-up photometric monitoring using the Panchromatic Robotic Optical Monitoring and Polarimetry Telescopes (PROMPT)-4 and ROAD observatories during 2012-2014 has not yielded any additional eclipses. Large regions of mass-period space are ruled out for the companion. For circular orbits the companion period is constrained to the range 3.5-13.8 yr (a∼2.2-5.6 au), and stellar masses (>80 MJup) are ruled out at 3σ significance over these periods. The complex ring system appears to occupy more than 0.15 of its Hill radius, much larger than its Roche radius and suggesting a ring structure in transition. Further, we demonstrate that the radial velocity of J1407 is consistent with membership in the Upper Cen-Lup subgroup of the Sco-Cen association, and constraints on the rotation period and projected rotational velocity of J1407 are consistent with a stellar inclination of i*∼68°±10°. Description: The brightness of J1407 has been monitored nearly nightly between 2012 June and 2014 June, when possible, with the PROMPT-4 telescope at CTIO (Reichart et al. 2005, Nuovo Cimento C, 28, 767). Three exposures of 3 s each are taken per clear night in both V and I filters. Nightly observations of J1407 (http://www.aavso.org/apass) have been taken at the ROAD (Hambsch 2012, J. Am. Assoc. Var. Star Obs., 40, 1003) observatory in Chile, using a commercially available CCD camera from Finger Lakes Instrumentation (http://www.flicamera.com/), an FLI ML16803 CCD, The Microline (ML) line of CCD cameras is a lightweight camera design which can hold a variety of CCD chips. Objects: ---------------------------------------------------------- RA (ICRS) DE Designation(s) ---------------------------------------------------------- 14 07 47.93 -39 45 42.8 J1407 = ASAS J140748-3945.7 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table8.dat 23 330 A sample of the photometry from the PROMPT-4 telescope. table9.dat 26 1122 A sample of the photometry from the ROAD observatory.
See also: J/A+A/216/44 : Walraven photometry in Sco-Cen association (De Geus+, 1989) J/ApJS/82/117 : UBV and H-beta in Sco-Cen association (Slawson+, 1992) J/A+A/356/541 : T Tauri stars in the Sco-Cen OB association (Koehler+, 2000) Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
1- 10 F10.5 d HJD Heliocentric Julian date (HJD-2450000) 12- 17 F6.3 mag Vmag CTIO V-band magnitude 19- 23 F5.3 mag e_Vmag Uncertainty in Vmag
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 13 F13.5 d HJD Heliocentric Julian date 15- 20 F6.3 mag Vmag ROAD V-band magnitude 22- 26 F5.3 mag e_Vmag Uncertainty in Vmag
History: From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 25-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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