J/PASJ/65/119 Low-resolution NIR spectra of zodiacal light (Tsumura+ 2013)
Low-resolution spectrum of the zodiacal light with the AKARI infrared camera.
Tsumura K., Matsumoto T., Matsuura S., Pyo J., Sakon I., Wada T.
<Publ. Astron. Soc. Jap., 65, 119 (2013)>
=2013PASJ...65..119T 2013PASJ...65..119T
ADC_Keywords: Interstellar medium ; Space observations ; Spectra, infrared ;
Zodiacal regions
Mission_Name: AKARI
Keywords: catalogs - infrared: solar system - interplanetary medium -
methods: data analysis - solar system: general
Description:
This catalog contains the 278 low-resolution (R∼20) near-infrared
(1.8-5.3micron) spectra of diffuse sky covering a wide range of
galactic and ecliptic latitudes with the Infrared Camera (IRC) on
board AKARI before the exhaustion of liquid-helium (from September
2006 to May 2007).
Advanced reduction methods specialized for the slit spectroscopy of
diffuse sky spectra are developed for constructing this spectral
catalog. Filter wheel of the IRC instrument has dark position to
measure the dark current, and uncertainty due to dark current
subtraction is estimated to be <3nW/m2/sr at 2micron (Tsumura &
Wada, 2011PASJ...63..755T 2011PASJ...63..755T).
Point sources brighter than mK(Vega)=19 were detected on the slit and
masked for deriving the diffuse spectrum. It was confirmed that the
brightness due to unresolved galactic stars under this detection limit
is negligible (<0.5% of the sky brightness at 2.2 micron) by a Milky
Way star count model (TRILEGAL; Girardi et al., 2005A&A...436..895G 2005A&A...436..895G).
Cumulative brightness contributed by unresolved galaxies can be
estimated by the deep galaxy counts, being <4nW/m2/sr at K band in the
case of limiting magnitude of mK=19 (Keenan et al.,
2010ApJ...723...40K 2010ApJ...723...40K).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 67 278 Source list for all spectra
spectrum/* . 278 NIR spectra of diffuse radiation at 1.8-5.3µm
plot/* . 278 *Images of spectral plot
image/* . 278 *Spectral images
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Note on plot/*: Images of spectral plot for a visualization. Error bars
include both statistical uncertainty and calibration uncertainty.
Note on image/*: Spectral images in FITS format. Dark current subtracted,
flat field corrected, and bad pixel masked images are provided.
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See also:
II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)
II/298 : AKARI/FIS all-sky survey PSC (ISAS/JAXA, 2010)
II/327 : AKARI far-infrared surveyor YSO catalog (Toth+, 2014)
J/A+A/537/A24 : AKARI NEP deep field mid-IR source catalogue (Takagi+, 2012)
J/A+A/559/A132 : AKARI NEP deep survey revised catalog (Murata+, 2013)
J/AJ/144/179 : AKARI-LMC point-source catalog (Kato+, 2012)
J/AJ/145/32 : AKARI-LMC NIR spectroscopic catalog (Shimonishi+, 2013
J/ApJ/784/53 : AKARI NIR spectral atlas of Galactic HII regions (Mori+ 2014)
http://www.ir.isas.jaxa.jp/AKARI/Archive/Catalogues : AKARI Home Page
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Target ID.sub-ID (NNNNNNN_NN)
12- 21 A10 "YYYY/MM/DD" Obs.date Observation date (1)
23- 30 A8 "h:m:s" Obs.time Observation time (1)
32- 38 F7.3 deg RAdeg Right Ascension (J2000) (2)
40- 46 F7.3 deg DEdeg Declination (J2000) (2)
48- 67 A20 --- FileName Name of the file without extension
(AKARIIRCNNNNNNN_NN) (3)
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Note (1): Obtained from header information in the original FITS file.
Note (2): Calculated coordinate at the center position of the Ns slit referring
to the header information in the original FITS file.
Note (3): Images in subdirectory images are labelled AKARIIRCNNNNNNN_NN.fits,
plots in subdirectory plot are labelled AKARIIRCNNNNNNN_NN.png, and
spectra in subdirectory spectrum are labelled AKARIIRCNNNNNNN_NN.txt.
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Byte-by-byte Description of file: spectrum/*
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Bytes Format Units Label Explanations
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1- 5 F5.3 um lambda [1.8/5.3] Wavelength
7- 14 F8.3 nW/m2/sr SuBr ?=- Surface brightness
16- 22 F7.3 nW/m2/sr s_SuBr ?=- Statistical uncertainty
24- 30 F7.3 nW/m2/sr e_SuBr ?=- Calibration uncertainty
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History:
* 25-Jun-2013: Original version (Tsumura Kohji, tsumura(at)ir.isas.jaxa.jp)
* 03-Feb-2015: Copied from
http://www.ir.isas.jaxa.jp/AKARI/Archive/Catalogues/IRC_diffuse_spec/
References:
Tsumura et al., Paper II 2013PASJ...65..120T 2013PASJ...65..120T
Tsumura et al., Paper III 2013PASJ...65..121T 2013PASJ...65..121T
(End) Tsumura Kohji [ISAS/JAXA], Patricia Vannier [CDS] 03-Feb-2015