Original Research by Young Twinkle Students (ORBYTS): ephemeris refinement of transiting exoplanets

EDWARDS, BILLY; CHANGEAT, QUENTIN; YIP, KAI HOU; TSIARAS, ANGELOS; TAYLOR, JAKE; AKHTAR, BILAL; ALDAGHIR, JOSEF; BHATTARAI, PRANUP; BHUDIA, TUSHAR; CHAPAGAI, AASHISH; HUANG, MICHAEL; KABIR, DANYAAL; KHAG, VIERAN; KHALIQ, SUMMYYAH; KHATRI, KUSH; KNETH, JAIDEV; KOTHARI, MANISHA; NAJMUDIN, IBRAHIM; PANCHALINGAM, LOBANAA; PATEL, MANTHAN; PREMACHANDRAN, LUXSHAN; QAYYUM, ADAM; RANA, PRASEN; SHAIKH, ZAIN; SYED, SHERYAR; THETI, HARNAM; ZAIDANI, MAHMOUD; SARAF, MANASVEE; DE MIJOLLA, DAMIEN; CAINES, HAMISH; KOKORI, ANATASIA; ROCCHETTO, MARCO; MALLONN, MATTHIAS; BACHSCHMIDT, MATTHIEU; BOSCH, JOSEP M; BRETTON, MARC; CHATELAIN, PHILIPPE; DELDEM, MARC; DI SISTO, ROMINA; EVANS, PHIL; FERNÁNDEZ-LAJÚS, EDUARDO; GUERRA, PERE; GRAU HORTA, FERRAN; KANG, WONSEOK; KIM, TAEWOO; LEROY, ARNAUD; LOMOZ, FRANTI?EK; DE HARO, JUAN LOZANO; HENTUNEN, VELI-PEKKA; JONGEN, YVES; MOLINA, DAVID; MONTAIGUT, ROMAIN; NAVES, RAMON; RAETZ, MANFRED; SAUER, THOMAS; WATKINS, AMERICO; WÜNSCHE, ANAËL; ZIBAR, MARTIN; DUNN, WILLIAM; TESSENYI, MARCELL; SAVIN

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2021 vol. 504 p. 5671 - 5684

0035-8711

We report follow-up observations of transiting exoplanets that have either large uncertainties (>10 minutes) in their transit times or have not been observed for over three years. A fully robotic ground-based telescope network, observations from citizen astronomers and data from TESS have been used to study eight planets, refining their ephemeris and orbital data. Such follow-up observations are key for ensuring accurate transit times for upcoming ground and space-based telescopes which may seek to characterise the atmospheres of these planets. We find deviations from the expected transit time for all planets, with transitsoccurring outside the 1 sigma uncertainties for seven planets. Using the newly acquired observations, we subsequently refine their periods and reduce the current predicted ephemeris uncertainties to 0.28 - 4.01 minutes. A significant portion of this work has been completed by students at two high schools in London aspart of the Original Research By Young Twinkle Students (ORBYTS) programme.