J/AJ/166/152 Main Belt Asteroid Rotation from TESS (McNeill+, 2023)
An untargeted survey of the rotational properties of main belt asteroids using
the Transiting Exoplanet Survey Satellite (TESS).
McNeill A., Gowanlock M., Mommert M., Trilling D.E., Llama J., Paddock N.
<Astron. J. 166, 152 (2023)>
=2023AJ....166..152M 2023AJ....166..152M (SIMBAD/NED BibCode)
ADC_Keywords: Solar system ; Minor planets ; Photometry ; Optical
Keywords: Asteroids ; Main belt asteroids
Abstract:
We present photometric data for minor planets observed by the
Transiting Exoplanet Survey Satellite during its Cycle 1 operations.
In total we extracted usable detections for 37965 objects. We present
an examination of the reliability of the rotation period and
lightcurve amplitudes derived from each object based upon the number
of detections and the normalised Lomb-Scargle power of our period
fitting and compare and contrast our results with previous similar
works. We show that for objects with 200 or more photometric
detections and a derived normalised, generalised Lomb-Scargle power
greater than 0.2 we have an 85% confidence in that period - this
encompasses 3492 rotation periods we consider to be highly reliable.
We independently examine a series of periods first reported by Pal et
al. (2020ApJS..247...26P 2020ApJS..247...26P) - periods derived in both works found to
have similar results should be considered reliable. Additionally we
demonstrate the need to properly account for the true proportion of
slow rotators (P>100h) when inferring shape distribution from sparse
photometry.
Description:
We downloaded the publicly available calibrated full frame images of
the Transiting Exoplanet Survey Satellite (TESS) Cycle 1 using the
bulk download services provided as the Barbara A. Mikulski Archive for
Space Telescopes (MAST). Photometric extraction was carried out for
known minor planets in these fields. From these results rotational
periods were derived and assigned confidence values.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
final.dat 55 28878 Final table LCDB quality flag true
gt200pts.dat 58 10175 TESS results, gt200pts (table 1)
3scycle1.dat 95 7543368 3sigma Cycle1 light curves for 37965 objects
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See also:
B/astorb : Orbits of Minor Planets (Bowell+ 2014)
Byte-by-byte Description of file: final.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Object Id Minor Planet Center ID
12- 20 F9.4 mag Amp Peak-to-trough light curve amplitude
22- 25 I4 --- NObs Number of individual observations
27- 32 F6.4 --- LSNorm Normalised signal power of the peak of
Lomb-Scargle periodogram
34- 41 F8.4 h Prot Rotational period
43- 48 F6.4 --- CVexact Confidence value that the derived period
is correct to within 3%
50- 55 F6.4 --- CValias Confidence value that the derived period
is correct to within 3% or is different
by a factor of 2.
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Byte-by-byte Description of file: gt200pts.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Object Minor Planet Center ID
12- 19 F8.4 h Prot Rotation period
21- 30 E10.2 h e_Prot Uncertainty on rotational period
32- 42 F11.9 mag Amp Light curve amplitude
44- 49 F6.4 --- CVexact Confidence value that the derived period
is correct to within 3%
51- 56 F6.4 --- CValias Confidence value that the derived period is
correct to within 3% or is different by a
factor of 2.
58 A1 --- Match? [Y/N/-] Result is considered a match to the
independent work of Pal et al.
(2020ApJS..247...26P 2020ApJS..247...26P)
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Byte-by-byte Description of file: 3scycle1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Object Minor Planet Center ID
12- 29 F18.12 d MJD Modified Julian Date of observation
31- 51 F21.17 h relh Time of observation in hours where earliest
observation of a given object is t=0
53- 73 F21.17 mag mag The instrumental magnitude of the object at
this time-stamp (1)
75- 95 F21.19 mag e_mag Uncertainty in instrumental magnitude
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Note (1): These values have not been calibrated to a true magnitude but have
been corrected for both distance and phase-angle effects.
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Acknowledgements:
Andrew McNeill, anm722(at)lehigh.edu
(End) Patricia Vannier [CDS] 16-Aug-2023