Exoplanet TOI 1811.01, Janakkala, Tervakoski

TOI 1811.01, part 2!

On April 14, twelve eVscoops headed for hot Jupiter found by TESS around a small star 418 light-years away.

We received three positive observations (including myself) and two partial observations.

Accurate Medium Transport Times of a few minutes were measured from the combined light curves and the appropriate model (details below). Depths and durations are also in line with expected values. So we got to confirm this item.

March 19 - Common light curve measurements

Average delivery time (minutes): 3.45 +/- 1.82

Duration (minutes): 128.29 +/- 10.95 (119.61 min. Exp.)

Depth: 2.26% +/- 0.30% (1.80% exp.)

Residual photometric scatter (standard deviation): 2.08%

April 14 - Common light curve measurements

Average delivery time compared to expected (minutes): -0.36 +/- 1.91

Duration (minutes): 107.11 +/- 4.86 (119.61 min)

Depth: 1.35% +/- 0.11% (1.80% exp.)

Residual photometric scatter (standard deviation): 1.30%

Timing Explanation

If you look at the previous observation on March 19, the preliminary results for March showed a delay of ~ 16 minutes. This turned out to be an error in the analysis - this was compared to an outdated forecast of medium transport time. Now that we’re using revised forecasts, our measurements are nicely consistent with them.

Tom Esposito (Lead Exoplanet Astronomer) and Arin Avsar (Exoplanet Astronomer) worked on this at the Seti Institute.

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Exoplanet TOI 1811.01 - 14.4.2021 at 23.44 - 15.4.2021 at 03.21 Janakkala, Tervakoski Observation number 98616