ACDS V10.0 - Tue Aug 25 14:28:25 CEST 2020
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Detailed Description of II/297 :
AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
II/297 AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)
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The AKARI/IRC Mid-Infrared All-Sky Survey (Version 1)
Ishihara D., Onaka T., Kataza H., Salama A., Alfageme C., Cassatella A.,
Cox N., Garcia-Lario P., Stephenson C., Cohen M., Fujishiro N.,
Fujiwara H., Hasegawa S., Ita Y., Kim W., Matsuhara H., Murakami H.,
Muller T.G., Nakagawa T., Ohyama Y., Oyabu S., Pyo J., Sakon I.,
Shibai H., Takita S., Tanab T., Uemizu K., Ueno M., Usui F., Wada T.,
Watarai H., Yamamura I., Yamauchi C.
<Astron. Astrophys. 514, A1 (2010)>
=2010A&A...514A...1I
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ADC_Keywords: Infrared sources ; Surveys ; Photometry, infrared
Mission_Name: AKARI
Keywords: infrared: general - techniques: image processing - surveys
Description:
The AKARI Infrared Astronomical Satellite observed the whole sky in
the far infrared (50-180µm) and the mid-infrared (9 and 18µm)
between May 2006 and August 2007 (Murakami et al. 2007PASJ...59S.369M)
The AKARI/IRC Point Source Catalogue Version 1.0 provides positions
and fluxes for 870,973 sources observed with the InfraRed Camera
(IRC): 844,649 sources in the S9W filter, and 194,551 sources in the
L18W filter; the "Note (1)" section below provides a summary of the
IRC filter characteristics.
Recommendation:
The users of the catalogue are requested to read the documents
carefully before critical discussions of the data. Any questions and
comments are appreciated at ISAS Helpdesk (iris_help@ir.isas.jaxa.jp)
Please acknowledge the usage of the AKARI data (details at
http://www.ir.isas.jaxa.jp/AKARI/Publications/guideline.html).
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× irc.dat 196 870973 AKARI/IRC All-Sky Survey Point Source Catalogue
(Version 1.0)
See also:
II/298 : AKARI/FIS Bright Source Point Source Catalogue (ISAS/JAXA, 2010)
http://www.ir.isas.jaxa.jp/AKARI/Observation/PSC/Public/ : AKARI home page
http://darts.isas.jaxa.jp/astro/akari/cas.html : AKARI Archive Server
Byte-by-byte Description of file: irc.dat
Bytes Format Units Label Explanations
2- 10 I9 --- objID [200000001/200870973] AKARI source ID number.
12- 25 A14 --- objName AKARI source name (HHMMSSs+DDMMSS) (2)
27- 35 F9.5 deg RAdeg Right Ascension (J2000)
37- 45 F9.5 deg DEdeg Declination (J2000)
49- 53 F5.2 arcsec errMaj Major axis of position error ellipse
57- 61 F5.2 arcsec errMin Minor axis of position error ellipse
64- 69 F6.2 deg errPA Position angle of Major axis
70- 80 E11.4 Jy S09 ?=-999.9 Flux density in AKARI/S9W filter (1)
81- 91 E11.4 Jy S18 ?=-999.9 Flux density in AKARI/L18W filter (1)
92-101 E10.3 Jy e_S09 ?=-1000 Flux error in S9W
102-111 E10.3 Jy e_S18 ?=-1000 Flux error in L18W
113 I1 --- q_S09 [0,3] Flux quality flag for S9W (3)
115 I1 --- q_S18 [0,3] Flux quality flag for L18W (3)
117-119 A3 --- --- [0]
120 A1 --- f09 [0-9a-f] Bit flags for S9W (4)
122-124 A3 --- --- [0]
125 A1 --- f18 [0-9a-f] Bit flags for L18W (4)
127-130 I4 --- Ns09 Number of scans with source detection in S9W
132-135 I4 --- Ns18 Number of scans with source detection in L18W
137-140 I4 --- Np09 Number of scans with possible detection in S09W
142-145 I4 --- Np18 Number of scans with possible detection in L18W
147-148 I2 --- M09 [0,1]?=-1 1 is month confirmed and 0 is not.
(inverted value of lower bit of f09)
150-151 I2 --- M18 [0,1]?=-1 1 is month confirmed and 0 is not.
(inverted value of lower bit of f18)
153-155 I3 --- Nd09 ?=-1 Number of sources in 45" radius in S9W
157-159 I3 --- Nd18 ?=-1 Number of sources in 45" radius in L18W
161-162 I2 --- X09 [0,1]?=-1 Extended source flag (5)
164-165 I2 --- X18 [0,1]?=-1 Extended source flag (5)
167-173 F7.2 arcsec r09 ?=-999.9 Radius of source extent in S9W (6)
175-181 F7.2 arcsec r18 ?=-999.9 Radius of source extent in L18W (6)
183-186 I4 --- Ndet Number of events used for position computation
188-191 I4 --- N09 Number of events used for S09 measurement
193-196 I4 --- N18 Number of events used for S18 measurement
Note (1): the filter characteristics are:
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Filter: S9W L18W
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Center(um): 9 18
Width(um): 4.10 9.97
Range(um): 6.7-11.6 13.9-25.6
Pixel("): 9.4x9.4 10.4x9.4
Limit(mJy): 50 120 [at 5{sigma}]
-------------------------------------------------
Note (2):
The sources should be referred in the literatures by their full name
(AKARI-IRC-V1) followed by the letter 'J' and the objName, e.g.
AKARI-IRC-V1 J0123498-025805
Note (3): Four-level flux quality indicator:
3 = high quality (source confirmed and flux is reliable)
2 = source is confirmed but the flux is not reliable (see the flags)
1 = the source is not confirmed
0 = not observed
Note (4): Bit flags of data quality in hexadecimal:
1 = not month confirmed.
This means that the period between the first detection and
the last detection is shorter than a month.
2 = saturated (not used this version);
4 = use events affected by the South Atlantic Anomaly (SAA)
(not used in this version),
8 = use edge events
Combined values are represented by the sum, e.g. 9 = 8 + 1 =
not month confirmed AND used edge events.
Note (5): the value 1 means that the source is possibly more extended than
the point spread function (>15.6arcsec)
Note (6): average of major and minor axes of source extent = (a+b)/2
History:
* 21-Apr-2010: from the AKARI pages
http://www.ir.isas.jaxa.jp/AKARI/Observation/PSC/Public/
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(End) Francois Ochsenbein [CDS] 21-Apr-2010