AKARI/FIS All-Sky Survey Bright Source Catalogue Version 1.0

AKARI/FIS Overview

The AKARI/FIS Bright Source Catalogue Version 1.0 provides the positions and fluxes of 427,071 point sources in the four far-infrared wavelengths centred at 65, 90, 140, and 160 microns. The sensitivity in the 90 micron band is about 0.55 Jy.

The Far-Infrared Surveyor (FIS) instrument scanned 98 percent of the entire sky more than twice during the 16 months of the cryogenic mission phase. The AKARI/FIS Bright Source Catalogue is the primary data product from the AKARI survey. The catalogue is designed to have a uniform detection limit (corresponding to per scan sensitivity) over the entire sky (except for high background regions where a different data acquisition mode was used). Redundant observations are used to increase the reliability of the detection.

The AKARI/FIS Release Note documentation can be found here.

AKARI/FIS Bright Source Catalogue v1.0 Column Descriptions

Gator serves the AKARI/FIS Bright Source Catalogue v1.0 (41 columns [36 delivered + 5 IRSA-created], 427,071 data rows). The column descriptions can be found below.

Name Intype Units Description
OBJID int Internal Object ID - should be ignored for astronomical analysis
OBJNAME char Source Identifier. Sources should be referred to in the literature using the full name "AKARI-FIS-V1 J"OBJNAME.
Example: AKARI-FIS-V1 J0123456+765432
ra double deg Right Ascension (J2000)
dec double deg Declination (J2000)
POSERRMJ float arcsec Position error major axis
POSERRMI float arcsec Position error minor axis
POSSERRPA float deg Position error Position Angle
FLUX65 float Jy Flux density in N60 (Jy)
FLUX90 float Jy Flux density in WIDE-S (Jy)
FLUX140 float Jy Flux density in WIDE-L (Jy)
FLUX160 float Jy Flux density in N160 (Jy)
FERR65 float Jy Flux uncertainty in N60
FERR90 float Jy Flux uncertainty in WIDE-S
FERR140 float Jy Flux uncertainty in WIDE-L
FERR160 float Jy Flux uncertainty in N160
FQUAL65 int Flux density quality flag for N60:
3: High quality (the source is confirmed and flux is reliable)
2: The source is confirmed but flux is not reliable (see FLAGS)
1: The source is not confirmed
0: Not observed (no scan data available)
FQUAL90 int Flux density quality flag for WIDE-S:
Values as in FQUAL65.
FQUAL140 int Flux density quality flag for WIDE-L:
Values as in FQUAL65.
FQUAL160 int Flux density quality flag for N160:
Values as in FQUAL65.
FLAGS65 char Bit flags of data quality for N60:
16 bit flag, of which bits 0, 1, and 3 are currently used.
Values are expressed in Hexadecimal format.
Sources with bit1 or bit3 = 1 have FQUAL = 2 or less.
bit0 = 0, normal mode; 1, CDS mode
bit1 = 1, flux too low
bit3 = 1, possible 'side-lobe' detection
FLAGS90 char Bit flags of data quality for WIDE-S:
Values as in FLAGS65.
FLAGS140 char Bit flags of data quality for WIDE-L:
Values as in FLAGS65.
FLAGS160 char Bit flags of data quality for N160:
Values as in FLAGS65.
NSCANC65 int Number of scans on which the source is detected for N60
NSCANC90 int Number of scans on which the source is detected for WIDE-S
NSCANC140 int Number of scans on which the source is detected for WIDE-L
NSCANC160 int Number of scans on which the source is detected for N160
NSCANP65 int Total number of scans that passed on the source for N60
NSCANP90 int Total number of scans that passed on the source for WIDE-S
NSCANP140 int Total number of scans that passed on the source for WIDE-L
NSCANP160 int Total number of scans that passed on the source for N160
MCONF65 int Months confirmation flag for N60:
Value is 1 when the source is observed in the scans separated by more than one month. Note, MCONF = 0 does not mean that the source is unreliable.
MCONF90 int Months confirmation flag for WIDE-S
MCONF140 int Months confirmation flag for WIDE-L
MCONF160 int Months confirmation flag for N160
NDENS int Number of sources in the catalog within a distance of 5 arcmin.