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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{deg} 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 104 505 The field list of the AMSS
table2.dat 130 1343 The source list of the AMSS
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See also:
J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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" StrObs Date of observation began
71- 72 I2 h StrObs.h Hour of observation began
74- 75 I2 min StrObs.m Minute of observation began
77- 86 A10 "YYYY/MM/DD" EndObs Date of observation ended
88- 89 I2 h EndObs.h Hour observation ended
91- 92 I2 min EndObs.m Minute observation ended
94- 98 F5.1 ks Exp Exposure time
100-103 F4.2 ct/s CRate Mean count rate of GIS2 and GIS3 including
the background
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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.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- 1AXG Source name (1AXG 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 Sig1 The 0.7-7 keV {sigma} detection significance
48- 52 F5.1 ct/ks Sig2 The 2-10 keV {sigma} detection significance
54- 58 F5.1 ct/ks Sig3 The 0.7-7 keV {sigma} detection significance
60- 64 F5.1 ct/ks CRate1 The 0.7-7 keV count rate (2)
66- 70 F5.1 ct/ks CRate2 The 2-10 keV count rate (2)
72- 76 F5.1 ct/ks CRate3 The 0.7-2 keV count rate (2)
78- 82 F5.1 ct/ks CRatec1 The corrected 0.7-7 keV count rate (3)
84- 88 F5.1 ct/ks CRatec2 The corrected 2-10 keV count rate (3)
90- 94 F5.1 ct/ks CRatec3 The corrected 0.7-2 keV count rate (3)
96-100 F5.1 10-20W/cm2 Flux1 The 0.7-7keV flux in 10^-13^erg/s/cm^2^ (4)
102-106 F5.1 10-20W/cm2 Flux2 The 2-10keV flux in 10^-13^erg/s/cm^2^ (4)
108-112 F5.1 10-20W/cm2 Flux3 The 0.7-2keV flux in 10^-13^erg/s/cm^2^ (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
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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.
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History:
From electronic version of the journal
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Apr-2001