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List of works by Ramotholo Sefako

A Large Ground-based Observing Campaign of the Disintegrating Planet K2-22b

scientific article published in Astronomical Journal

A Second Planet Transiting LTT 1445A and a Determination of the Masses of Both Worlds

scientific article published on 14 March 2022

A Transiting Super-Earth in the Radius Valley and An Outer Planet Candidate Around HD 307842

scientific article published in 2023

A dearth of small particles in the transiting material around the white dwarf WD 1145+017

article

A massive hot Jupiter orbiting a metal-rich early-M star discovered in the TESS full frame images

A super-Earth and two sub-Neptunes transiting the nearby and quiet M dwarf TOI-270

A temperate Earth-sized planet with tidal heating transiting an M6 star

scientific article published on 17 May 2023

BVIc photometry of classical cepheids from the ASAS-3 catalog

scientific article published in January 2011

CCD BVI_c_ observations of Cepheids

scientific article published in January 2014

CCD BVIc observations of classical Cepheids in 2013-2014

scientific article published in January 2015

CCD Observations of three RR Lyrae-type stars: CL Eri, CM Eri, and CN Eri

scholarly article

CCD observations of 11 variables classified in the GCVS as RR Lyrae-type stars without light-curve elements

scholarly article

Classical Cepheids and the spiral structure of the Milky Way ⬇️

scientific article published in January 2015

Constraining the physics of carbon crystallization through pulsations of a massive DAV BPM37093

Determining the extragalactic extinction law with SALT

scientific article published in January 2008

Determining the extragalactic extinction law with SALT - II. Additional sample

scientific article published in January 2010

Discovery of the first symbiotic star in NGC 6822

scientific article

EPIC 201702477b: A TRANSITING BROWN DWARF FROMK2IN A 41 DAY ORBIT ⬇️

scientific article published in Astronomical Journal

Empirical determination of convection parameters in white dwarfs. I. Whole earth telescope observations of EC14012-1446 ⬇️

scientific article published in the Astrophysical Journal

GJ 1252 b: A 1.2 R ⊕ Planet Transiting an M3 Dwarf at 20.4 pc

K2-114b and K2-115b: Two Transiting Warm Jupiters

scientific article published in Astronomical Journal

K2-140b – an eccentric 6.57 d transiting hot Jupiter in Virgo

scientific article

Multi-site observations of pulsation in the accreting white dwarf SDSS J161033.64-010223.3 (V386 ser) ⬇️

scientific article published in the Astrophysical Journal

NGTS 15b, 16b, 17b and 18b: four hot Jupiters from the Next Generation Transit Survey ⬇️

scientific article published on 18 March 2021

NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit

scientific article

Optical spectroscopy of XMMU J115113.3-623730 = Nova Cen 2008

scholarly article

Periodic variations in the O - C diagrams of five pulsation frequencies of the DB white dwarf EC 20058-5234 ⬇️

scientific article published in January 2013

Photometry of 2006 RH_120_: an asteroid temporary captured into a geocentric orbit

scientific article published in January 2009

Possible optical identification of gamma-ray blazars

scientific article published in January 2003

Precise masses for the transiting planetary system HD 106315 with HARPS

scientific article published in Astronomy and Astrophysics

Preliminary XCOV26 results for EC14012-1446

RR Lyrae variables: visual and infrared luminosities, intrinsic colours and kinematics

scientific article

SB 796: a high-velocity RRc star

scientific article

Simultaneous infrared and optical observations of the transiting debris cloud around WD 1145+017 ⬇️

scholarly article

SpUpNIC (Spectrograph Upgrade: Newly Improved Cassegrain): a versatile and efficient low- to medium-resolution, long-slit spectrograph on the South African Astronomical Observatory’s 1.9-m telescope

scientific article

TESS Delivers Five New Hot Giant Planets Orbiting Bright Stars from the Full-frame Images

scientific article

TESS Discovery of Twin Planets near 2:1 Resonance around Early M-Dwarf TOI 4342

TESS Hunt for Young and Maturing Exoplanets (THYME) X: a two-planet system in the 210 Myr MELANGE-5 Association

TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets Around M Dwarf Stars and Revised Parameters for Three Others

TOI 4201 b and TOI 5344 b: Discovery of Two Transiting Giant Planets around M-dwarf Stars and Revised Parameters for Three Others

scientific article published in October 2023

TOI-1859b: A 64-Day Warm Jupiter on an Eccentric and Misaligned Orbit

TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica

scientific article published on 18 October 2023

TOI-199 b: A well-characterized 100-day transiting warm giant planet with TTVs seen from Antarctica

TOI-216b and TOI-216c: Two warm, large exoplanets in or slightly wide of the 2:1 orbital resonance

TOI-332 b: a super dense Neptune found deep within the Neptunian desert

The Discovery and Follow-up of Four Transiting Short-period Sub-Neptunes Orbiting M dwarfs

scientific article

The Discovery of a Planetary Companion Interior to Hot Jupiter WASP-132 b ⬇️

scientific article published on 16 June 2022

The L 98-59 system: three transiting, terrestrial-size planets orbiting a nearby M dwarf

scientific article published in January 2019

The LHS 1678 System: Two Earth-sized Transiting Planets and an Astrometric Companion Orbiting an M Dwarf Near the Convective Boundary at 20 pc

scholarly article

The TESS Grand Unified Hot Jupiter Survey. I. Ten TESS Planets

scientific article published on 27 July 2022

The UBV(RI)_C_ colors of the Sun ⬇️

scientific article published in January 2012

The pulsations of PG 1351+489

scientific article

VaTEST III: Validation of eight potential super-earths from TESS data

scientific article

Validation of up to seven TESS planet candidates through multi-colour transit photometry using MuSCAT2 data

scientific article published in October 2024

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