Infrared Photometric Data of Asteroids with AKARI
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Asteroid Catalog Using AKARI: AKARI/IRC Mid-Infrared Asteroid Survey
Usui, F., Kuroda, D., Mueller, T. G., et al.
<Publ. Astron. Soc. Japan, 63, 1117-1138 (2011)>
=2011PASJ...63.1117U
The Asteroid Catalog Using AKARI IRC Slow-Scan Observations
Hasegawa, S., Mueller, T. G., Kuroda, D., et al.
<Publ. Astron. Soc. Japan, 65, 34, 1-11 (2013)>
=2013PASJ...65...34H
(25143) Itokawa: The power of radiometric techniques for the interpretation of
remote thermal observations in the light of the Hayabusa rendezvous results
Mueller, T. G., Hasegawa, S., and Usui, F.
<Publ. Astron. Soc. Japan, 66, 52, 1-17 (2014)>
=2014PASJ...66...52M
Hayabusa-2 Mission Target Asteroid 162173 Ryugu (1999 JU3): Searching for
the Object's Spin-Axis Orientation
Mueller, T. G., Durech, J., Ishiguro, M., et al.
(submitted to Astronomy & Astrophysics, 2016)
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ADC_Keywords: Solar system ; Minor planets ; Photometry, infrared
Mission_Name: AKARI
Keywords: catalogs - infrared: solar system - minor planets, asteroids -
space vehicles; instruments - surveys
Description:
This catalog contains photometric data of 5201 asteroids observed with the
infrared astronomical satellite AKARI (Murakami et al. 2007). The catalog
objects comprise the near-Earth asteroids, the main belt asteroids, the
Cybeles, the Hildas, and the Jovian Trojan asteroids. The observations were
performed with the Infrared Camera (IRC; Onaka et al. 2007) on board AKARI
by the all-sky survey in 9 or 18 um bands as well as the slow-scan
observations in 9 or 18 um bands, and the pointed observations in 3, 4, 7,
11, 15, and/or 24 um bands. The all-sky survey (Usui et al. 2011) and the
slow-scan observations (Hasegawa et al. 2013) detected asteroids
serendipitously, while the pointed observations (Mueller et al. 2014, 2016)
intentionally targeted the objects. Note that an asteroid was not observed
with two or more bands simultaneously because of the alignment of the focal
plane instruments or the filter operation of the detector.
Data reductions were performed by the following methods:
The all-sky survey: The data reduction and flux calibration were applied
in the same manner as in the IRC Point Source Catalog
(Ishihara et al. 2010). See Usui et al. (2011) for details.
The Slow-scan observations: The IRC slow-scan observation data were
reduced by the AKARI data reduction tools (Takita et al. 2012). Flux
calibration is given in Hasegawa et al. (2013). See Hasegawa et al.
(2013) for details.
The pointed observations: The imaging data reduction toolkit was applied
for data reduction (version 20070104 for (25143) Itokawa, and version
20150331 for (162173) Ryugu). Flux calibration is described in Tanabe
et al. (2008). See Mueller et al. (2014, 2016) for details.
See also:
The Infrared Astronomical Mission AKARI
Murakami, H., Baba, H., Barthel, P., et al.
<Publ. Astron. Soc. Japan, 59, S369-S376 (2007)>
=2007PASJ...59S.369M
The Infrared Camera (IRC) for AKARI -- Design and Imaging Performance
Onaka, T., Matsuhara, H., Wada, T., et al.
<Publ. Astron. Soc. Japan, 59, S401-S410 (2007)>
=2007PASJ...59S.401O
Absolute Photometric Calibration of the Infrared Camera (IRC) aboard AKARI
Tanabe, T., Sakon, I., Cohen, M., et al.
<Publ. Astron. Soc. Japan, 60, S375--S388 (2008)>
=2008PASJ...60S.375T
Albedo, Size, and Surface Characteristics of Hayabusa-2 Sample-Return
Target 162173 1999 JU3 from AKARI and Subaru Observations
Hasegawa, S., Mueller, T. G., Kawakami, K., et al.
<Publ. Astron. Soc. Japan, 60, S399-S405 (2008)>
=2008PASJ...60S.399H
The AKARI/IRC mid-infrared all-sky survey
Ishihara, D., Onaka, T., Kataza, H., et al.
<Astro. Astrophys., 514, A1, 1-14 (2010)>
=2010A&A...514A...1I
Slow-Scan Observations with the Infrared Camera (IRC) aboard AKARI
Takita, S., Ikeda, N., Kitamura, Y., et al.
<Publ. Astron. Soc. Japan, 64, 126, 1-8 (2012)>
=2012PASJ...64..126T
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
AST_FLUX_V1.txt 169 20780 Photometric data of asteroids
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Byte-by-byte Description of file: AST_FLUX_V1.txt
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Bytes Format Units Label Explanations
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1- 6 A6 --- Number Asteroid's number
8- 23 A16 --- Name Asteroid's name
25- 34 A10 --- Prov_des Asteroid's provisional designation
36- 58 A23 --- Datetime Observation datetime (UT)
60- 70 A11 h:m:s RA Right ascension (J2000)
72- 82 A11 d:m:s Dec Declination (J2000)
84- 93 F10.6 Jy inFlux In-band flux density
95-103 F9.6 Jy e_inFlux In-band flux density uncertainty
105-114 F10.6 Jy ccFlux Color-corrected flux density (1)
116-124 F9.6 Jy e_ccFlux Color-corrected flux density uncertainty (1)
126-128 A3 um band Observed band
130-137 F8.6 au Rh Heliocentric distance
139-146 F8.6 au Delta "AKARI-centric" distance
148-152 F5.2 deg Alpha Phase angle (Sun-Target-Observer angle)
154-158 F5.2 deg Elong Elongation angle (Sun-Observer-Target angle)
160-165 A6 --- Mode Observational mode (2)
167-169 A3 --- Ref Reference (3)
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Note (1):
Differences in color between asteroids and the calibration stars (mainly
K-, M-, and A-type giant stars) need to be considered, because of the wide
bandwidths of observed filters. The filter profiles of the IRC are available
at:
http://www.ir.isas.jaxa.jp/AKARI/Observation/support/IRC/RSRF/
To obtain color-corrected monochromatic flux density, color corrections
were applied which is expressed as a polynomial function of the heliocentric
distance of the object. See Usui et al. (2011) for details. Note that the
data of color-corrected flux density in shorter wavelength (4 um bands) may
have large uncertainty due to contamination of reflected sunlight to thermal
flux of asteroid.
Note (2):
Observational modes used for detection of asteroid are described as follows:
survey: the all-sky survey
IRC11,IRC51: the slow-scan observations
IRC02: the pointed observations
Note (3):
Reference papers of the data are described as follows:
U11: Asteroid Catalog Using AKARI: AKARI/IRC Mid-Infrared Asteroid Survey
Usui, F., et al. 2011
H13: The Asteroid Catalog Using AKARI IRC Slow-Scan Observations
Hasegawa, S., et al. 2013
M14: (25143) Itokawa: The power of radiometric techniques for the
interpretation of remote thermal observations in the light of
the Hayabusa rendezvous results
Mueller, T. G., et al. 2014
M16: Hayabusa-2 Mission Target Asteroid 162173 Ryugu (1999 JU3): Searching
for the Object's Spin-Axis Orientation
Mueller, T. G., et al. 2016
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History:
* 27-Sep-2016: Documentation prepared by Fumihiko Usui
Author's address:
Fumihiko Usui, usui(at)cps-jp.org
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(End) Fumihiko Usui [Kobe University] 27-Sep-2016