ACDS V10.0 - Detailed Description of II/297

ACDS V10.0 - Thu Jan 16 22:50:08 CET 2025

| # Detailed Description of II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010) |

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)
    ================================================================================
    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
    ================================================================================
    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:
         -------------------------------------------------
               Filter:    S9W      L18W
         -------------------------------------------------
           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/
    ================================================================================
    (End)                                   Francois Ochsenbein [CDS]    21-Apr-2010