ACDS V10.0 - Fri May 03 23:44:59 CEST 2019
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Detailed Description of J/ApJS/133/1 : GIS catalog project : source catalog (Ueda+, 2001)
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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/133/1 GIS catalog project : source catalog (Ueda+, 2001)
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The ASCA Medium Sensitivity Survey (the GIS catalog project): source catalog.
Ueda Y., Ishisaki Y., Takahashi T., Makishima K., Ohashi T.
<Astrophys. J. Suppl. Ser. 133, 1 (2001)>
=2001ApJS..133....1U
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ADC_Keywords: Galaxy catalogs ; X-ray sources ;
Mission_Name: ASCA
Keywords: catalogs - diffuse radiation - galaxies: active - X-rays: galaxies -
X-rays: general
Abstract:
We present the first X-ray source catalog of the ASCA Medium
Sensitivity Survey (AMSS, or the GIS catalog project), constructed
from data at Galactic latitudes |b|>10° observed between 1993 May
and 1996 December. The catalog utilizes 368 combined fields and
contains 1343 sources with the detection significance above 5{sigma}
either in the survey bands of 0.7-7keV, 2-10keV, or 0.7-2keV,
including target sources. For each source, the ASCA source name,
position, a 90% error radius, count rates in the three bands,
detection significances, fluxes, and a hardness ratio are provided.
With extensive simulations, we carefully evaluate the data quality of
the catalog. Results from cross-correlation with other existing
catalogs are briefly summarized.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× table1.dat 104 505 The field list of the AMSS
× table2.dat 130 1343 The source list of the AMSS
See also:
J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999)
J/ApJS/161/185 : GIS catalog project : source catalog II (Ueda+, 2005)
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Field Field identification
5 A1 --- f_Field [a] Indicates not used in Section 4
statistical analysis
7- 10 F4.1 10+20/cm2 NH Galactic hydrogen column density (1)
12- 19 I8 --- Seq Sequence Number
21- 38 A18 --- Target Target name
40- 46 F7.3 deg RAdeg Average right ascension pointing (J2000)
48- 54 F7.3 deg DEdeg Average declination pointing (J2000)
56- 58 I3 deg Roll Roll angle (2)
60- 69 A10 "YYYY/MM/DD" Obs1.Date Date observation began
71- 72 I2 h Obs1.h Hour observation began
74- 75 I2 min Obs1.m Minute observation began
77- 86 A10 "YYYY/MM/DD" Obs2.Date Date observation ended
88- 89 I2 h Obs2.h Hour observation ended
91- 92 I2 min Obs2.m Minute observation ended
94- 98 F5.1 ks Exp Exposure time
100-103 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 (JHHMMSS+DDMM)
19- 26 F8.4 deg RAdeg Right ascension (J2000)
28- 35 F8.4 deg DEdeg Declination (J2000)
37- 40 F4.2 arcmin PosErr The 90% error radius (1)
42- 46 F5.1 ct/ks SigF The 0.7-7 keV {sigma} detection significance
48- 52 F5.1 ct/ks SigH The 2-10 keV {sigma} detection significance
54- 58 F5.1 ct/ks SigS The 0.7-2 keV {sigma} detection significance
60- 64 F5.1 ct/ks CRF The 0.7-7 keV count rate (2)
66- 70 F5.1 ct/ks CRH The 2-10 keV count rate (2)
72- 76 F5.1 ct/ks CRS The 0.7-2 keV count rate (2)
78- 82 F5.1 ct/ks CRFc The corrected 0.7-7 keV count rate (3)
84- 88 F5.1 ct/ks CRHc The corrected 2-10 keV count rate (3)
90- 94 F5.1 ct/ks CRSc The corrected 0.7-2 keV count rate (3)
96-100 F5.1 10-16W/m2 FluxF The 0.7-7keV flux in 10-13erg/s/cm2 (4)
102-106 F5.1 10-16W/m2 FluxH The 2-10keV flux in 10-13erg/s/cm2 (4)
108-112 F5.1 10-16W/m2 FluxS The 0.7-2keV flux in 10-13erg/s/cm2 (4)
114-118 F5.2 --- HR Hardness ratio (5)
120-123 F4.2 --- e_HR Uncertainty in HR
125-127 I3 --- Field Field identification
129 A1 --- f_Field Indicates the target source
Note (1): Including both the statistical and systematic errors. See text
(section 3.3) 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).
Note (5): Ratio = (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.
History:
From electronic version of the journal
* 14-Oct-2001: table1.dat, record #376: target name RD_J13434
corrected into RX_J13434+0001
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Apr-2001