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Detailed Description of J/ApJS/161/185 :
GIS catalog project : source catalog II (Ueda+, 2005)

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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.
J/ApJS/161/185        GIS catalog project : source catalog II      (Ueda+, 2005)
================================================================================
The ASCA medium sensitivity survey (The GIS catalog project): source catalog II.
    Ueda Y., Ishisaki Y., Takahashi T., Makishima K., Ohashi T.
   <Astrophys. J. Suppl. Ser., 161, 185-223 (2005)>
   =2005ApJS..161..185U
================================================================================
ADC_Keywords: Galaxy catalogs ; X-ray sources

Mission_Name: ASCA

Keywords: catalogs - diffuse radiation - galaxies: active - X-rays: galaxies -
          X-rays: general

Abstract:
    In succession to the first ASCA Medium Sensitivity Survey catalog
    (AMSS-I), we present the second X-ray source catalog (AMSS-II),
    constructed from the Gas Imaging Spectrometer (GIS) data covering
    Galactic latitudes |b|>10° observed between 1997 January and 2000
    May. The AMSS-II catalog uses 306 fields and contains a total of 1190
    sources detected with significance of >5{sigma} in either the 0.7-7,
    2-10, or 0.7-2keV band. The AMSS-I and AMSS-II catalogs list a total
    of 2533 sources from an area of 278°2 and provides a unique
    database of X-ray sources in the flux range of
    10-13-10-11ergs/cm2/s (0.7-10keV). We summarize statistical
    properties of a complete X-ray sample consisting of 1969 serendipitous
    selected from AMSS-I and AMSS-II.

Description:
    We apply the same analysis technique, data screening, and field
    selection as done for AMSS-I to the GIS data of |b|>10° observed
    between 1997 January 1 and 2000 May 1.

File Summary:

FileName Lrecl Records Explanations
× 80 . This file × ReadMe 80 . This file × table1.dat 108 355 The field list of AMSS-II × table2.dat 132 1190 The source list of AMSS-II × table4.dat 59 85 The list of duplicated sources in the AMSS-I and AMSS-II catalogs
See also: J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999) J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Field Field identification (II-NNN) 8 A1 --- f_Field [a] Indicates that the field is not used in Section 4 statistical analysis 10- 13 F4.1 10+20/cm2 NH Galactic hydrogen column density (1) 15- 22 I8 --- Seq Sequence Number 24- 43 A20 --- Target Target name 45- 51 F7.3 deg RAdeg Average right ascension pointing (J2000) 53- 59 F7.3 deg DEdeg Average declination pointing (J2000) 61- 63 I3 deg Roll Roll angle (2) 65- 74 A10 "YYYY/MM/DD" Obs1.Date Date of beginning of observation 76- 77 I2 h Obs1.h Hour observation began 79- 80 I2 min Obs1.m Minute observation began 82- 91 A10 "YYYY/MM/DD" Obs2.Date Date of end of observation 93- 94 I2 h Obs2.h Hour observation ended 96- 97 I2 min Obs2.m Minute observation ended 99-103 F5.1 ks ExpTime Exposure time 105-108 F4.2 ct/s CR Mean count rate of GIS2 and GIS3 including the background
Note (1): Estimated from the HI map by Dickey & Lockman (1990ARA&A..28..215D). Note (2): Defined as that of detector-y axis measured in clockwise direction from the north.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1AXG] 6- 17 A12 --- 1AXG Source name (1AXG JHHMMSS+DDMM in Simbad) 19- 26 F8.4 deg RAdeg Right ascension (J2000) 28- 35 F8.4 deg DEdeg Declination (J2000) 37- 40 F4.2 arcmin e_pos The 90% error radius (1) 42- 46 F5.1 --- SigF Full 0.7-7keV {sigma} detection significance 48- 52 F5.1 --- SigH Hard 2-10keV {sigma} detection significance 54- 58 F5.1 --- SigS Soft 0.7-2keV {sigma} detection significance 60- 64 F5.1 ct/ks CRF Full 0.7-7keV count rate (2) 66- 70 F5.1 ct/ks CRH Hard 2-10keV count rate (2) 72- 76 F5.1 ct/ks CRS Soft 0.7-2keV count rate (2) 78- 82 F5.1 ct/ks CRFc Corrected full 0.7-7keV count rate (3) 84- 88 F5.1 ct/ks CRHc Corrected hard 2-10keV count rate (3) 90- 94 F5.1 ct/ks CRSc Corrected soft 0.7-2keV count rate (3) 96-100 F5.1 10-16W/m2 FluxF Full 0.7-7keV flux in 10-13ergs/s/cm2 (4) 102-106 F5.1 10-16W/m2 FluxH Hard 2-10keV flux in 10-13ergs/s/cm2 (4) 108-112 F5.1 10-16W/m2 FluxS Soft 0.7-2keV flux in 10-13ergs/s/cm2 (4) 114-118 F5.2 --- HR Hardness ratio (5) 120-123 F4.2 --- e_HR Uncertainty in HR 125-130 A6 --- Field Field identification (II-NNN) 132 A1 --- f_Field [*] Indicates the target source
Note (1): Including both the statistical and systematic errors. See text (section 3.3 of Paper I, J/ApJS/133/1) for details. Note (2): Vignetting-corrected count rate at the reference position in the XRT coordinate (8.5' offset) integrated within a radius of 5.9'. Not corrected for Galactic absorption. Note (3): Corrected for Galactic absorption, estimated from Dickey & Lockman (1990ARA&A..28..215D) Note (4): Corrected for Galactic absorption. Converted from the observed count rate in the same band, by assuming a power law with Galactic absorption, with the best-fit photon index derived from the observed hardness ratio Ratio (see section 2.4 of Paper I, J/ApJS/133/1). Note (5): HR=(H-S)/(H+S), where H and S represent the count rate corrected for Galactic absorption in the 2-10keV and 0.7-2keV bands, respectively.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [1AXG] 6- 17 A12 --- 1AXG Source name 19- 24 A6 --- Field Field identification (I-NNN) 26- 29 A4 --- --- [1AXG] 31- 42 A12 --- 1AXGb Source name 44- 49 A6 --- Fieldb Field identification (I-NNN or II-NNN) 51- 54 F4.2 arcmin Sep Angular separation of the two positions 56- 59 F4.2 arcmin e_Sep The combined 90% positional error in Sep
History: From electronic version of the journal References: Ueda et al., Paper I 2001ApJS..133....1U, Cat. J/ApJS/133/1 ================================================================================ (End) Greg Schwarz [AAS], Marianne Brouty [CDS] 14-Jun-2006