Aarhus University Seal / Aarhus Universitets segl

Tess data for asteroseismology: Timing verification

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Tess data for asteroseismology : Timing verification. / Essen, Carolina von; Lund, Mikkel N.; Handberg, Rasmus; Sosa, Marina S.; Gadeberg, Julie Thiim; Kjeldsen, Hans; Vanderspek, Roland K.; Mortensen, Dina S.; Mallonn, M.; Mammana, L.; Morgan, Edward H.; Jesus, Jesus Noel; Fausnaugh, Michael M.; Ricker, George R.

I: Astronomical Journal, Bind 160, Nr. 1, 34, 07.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Essen, CV, Lund, MN, Handberg, R, Sosa, MS, Gadeberg, JT, Kjeldsen, H, Vanderspek, RK, Mortensen, DS, Mallonn, M, Mammana, L, Morgan, EH, Jesus, JN, Fausnaugh, MM & Ricker, GR 2020, 'Tess data for asteroseismology: Timing verification', Astronomical Journal, bind 160, nr. 1, 34. https://doi.org/10.3847/1538-3881/ab93dd

APA

Essen, C. V., Lund, M. N., Handberg, R., Sosa, M. S., Gadeberg, J. T., Kjeldsen, H., Vanderspek, R. K., Mortensen, D. S., Mallonn, M., Mammana, L., Morgan, E. H., Jesus, J. N., Fausnaugh, M. M., & Ricker, G. R. (2020). Tess data for asteroseismology: Timing verification. Astronomical Journal, 160(1), [34]. https://doi.org/10.3847/1538-3881/ab93dd

CBE

Essen CV, Lund MN, Handberg R, Sosa MS, Gadeberg JT, Kjeldsen H, Vanderspek RK, Mortensen DS, Mallonn M, Mammana L, Morgan EH, Jesus JN, Fausnaugh MM, Ricker GR. 2020. Tess data for asteroseismology: Timing verification. Astronomical Journal. 160(1):Article 34. https://doi.org/10.3847/1538-3881/ab93dd

MLA

Vancouver

Author

Essen, Carolina von ; Lund, Mikkel N. ; Handberg, Rasmus ; Sosa, Marina S. ; Gadeberg, Julie Thiim ; Kjeldsen, Hans ; Vanderspek, Roland K. ; Mortensen, Dina S. ; Mallonn, M. ; Mammana, L. ; Morgan, Edward H. ; Jesus, Jesus Noel ; Fausnaugh, Michael M. ; Ricker, George R. / Tess data for asteroseismology : Timing verification. I: Astronomical Journal. 2020 ; Bind 160, Nr. 1.

Bibtex

@article{94f662e6a0e4401db9b1fffa8ebb9abe,
title = "Tess data for asteroseismology: Timing verification",
abstract = "The Transiting Exoplanet Survey Satellite (TESS) is NASA's latest space telescope dedicated to the discovery of transiting exoplanets around nearby stars. Besides the main goal of the mission, asteroseismology is an important secondary goal and very relevant for the high-quality time series that TESS will make during its two-year all-sky survey. Using TESS for asteroseismology introduces strong timing requirements, especially for coherent oscillators. Although the internal clock on board TESS is precise in its own time, it might have a constant drift. Thus, it will need calibration, or else offsets might inadvertently be introduced. Here, we present simultaneous ground- and space-based observations of primary eclipses of several binary systems in the Southern ecliptic hemisphere, used to verify the reliability of the TESS timestamps. From 12 contemporaneous TESS/ground observations, we determined a time offset equal to 5.8 ± 2.5 s, in the sense that the barycentric time measured by TESS is ahead of real time. The offset is consistent with zero at the 2.3σ level. In addition, we used 405 individually measured mid-eclipse times of 26 eclipsing binary stars observed solely by TESS in order to test the existence of a potential drift with a monotonic growth (or decay) affecting the observations of all stars. We find a drift corresponding to σ drift = 0.009 ± 0.015 s day-1. We find that the measured offset is of a size that will not become an issue for comparing ground-based and space data for coherent oscillations for most of the targets observed with TESS. ",
author = "Essen, {Carolina von} and Lund, {Mikkel N.} and Rasmus Handberg and Sosa, {Marina S.} and Gadeberg, {Julie Thiim} and Hans Kjeldsen and Vanderspek, {Roland K.} and Mortensen, {Dina S.} and M. Mallonn and L. Mammana and Morgan, {Edward H.} and Jesus, {Jesus Noel} and Fausnaugh, {Michael M.} and Ricker, {George R.}",
year = "2020",
month = jul,
doi = "10.3847/1538-3881/ab93dd",
language = "English",
volume = "160",
journal = "The Astronomical Journal",
issn = "0004-6256",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - Tess data for asteroseismology

T2 - Timing verification

AU - Essen, Carolina von

AU - Lund, Mikkel N.

AU - Handberg, Rasmus

AU - Sosa, Marina S.

AU - Gadeberg, Julie Thiim

AU - Kjeldsen, Hans

AU - Vanderspek, Roland K.

AU - Mortensen, Dina S.

AU - Mallonn, M.

AU - Mammana, L.

AU - Morgan, Edward H.

AU - Jesus, Jesus Noel

AU - Fausnaugh, Michael M.

AU - Ricker, George R.

PY - 2020/7

Y1 - 2020/7

N2 - The Transiting Exoplanet Survey Satellite (TESS) is NASA's latest space telescope dedicated to the discovery of transiting exoplanets around nearby stars. Besides the main goal of the mission, asteroseismology is an important secondary goal and very relevant for the high-quality time series that TESS will make during its two-year all-sky survey. Using TESS for asteroseismology introduces strong timing requirements, especially for coherent oscillators. Although the internal clock on board TESS is precise in its own time, it might have a constant drift. Thus, it will need calibration, or else offsets might inadvertently be introduced. Here, we present simultaneous ground- and space-based observations of primary eclipses of several binary systems in the Southern ecliptic hemisphere, used to verify the reliability of the TESS timestamps. From 12 contemporaneous TESS/ground observations, we determined a time offset equal to 5.8 ± 2.5 s, in the sense that the barycentric time measured by TESS is ahead of real time. The offset is consistent with zero at the 2.3σ level. In addition, we used 405 individually measured mid-eclipse times of 26 eclipsing binary stars observed solely by TESS in order to test the existence of a potential drift with a monotonic growth (or decay) affecting the observations of all stars. We find a drift corresponding to σ drift = 0.009 ± 0.015 s day-1. We find that the measured offset is of a size that will not become an issue for comparing ground-based and space data for coherent oscillations for most of the targets observed with TESS.

AB - The Transiting Exoplanet Survey Satellite (TESS) is NASA's latest space telescope dedicated to the discovery of transiting exoplanets around nearby stars. Besides the main goal of the mission, asteroseismology is an important secondary goal and very relevant for the high-quality time series that TESS will make during its two-year all-sky survey. Using TESS for asteroseismology introduces strong timing requirements, especially for coherent oscillators. Although the internal clock on board TESS is precise in its own time, it might have a constant drift. Thus, it will need calibration, or else offsets might inadvertently be introduced. Here, we present simultaneous ground- and space-based observations of primary eclipses of several binary systems in the Southern ecliptic hemisphere, used to verify the reliability of the TESS timestamps. From 12 contemporaneous TESS/ground observations, we determined a time offset equal to 5.8 ± 2.5 s, in the sense that the barycentric time measured by TESS is ahead of real time. The offset is consistent with zero at the 2.3σ level. In addition, we used 405 individually measured mid-eclipse times of 26 eclipsing binary stars observed solely by TESS in order to test the existence of a potential drift with a monotonic growth (or decay) affecting the observations of all stars. We find a drift corresponding to σ drift = 0.009 ± 0.015 s day-1. We find that the measured offset is of a size that will not become an issue for comparing ground-based and space data for coherent oscillations for most of the targets observed with TESS.

UR - http://www.scopus.com/inward/record.url?scp=85087750088&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/ab93dd

DO - 10.3847/1538-3881/ab93dd

M3 - Journal article

AN - SCOPUS:85087750088

VL - 160

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 1

M1 - 34

ER -