IX/16 Third Ariel X-Ray Catalogue (3A) (Warwick+ 1981)
The Ariel V (3A) catalogue of X-ray sources.
I. Sources at low galactic latitude (|b|<10)
II. Sources at high galactic latitude (|b|>10)
Warwick R.S., Marshall N., Fraser G.W., Watson M.G., Lawrence A.,
Page C.G., Pounds K.A., Ricketts M.J., Sims M.R., Smith A.;
McHardy I.M., Lawrence A., Pye J.J., Pounds K.A.
<Mon. Not. R. Astron. Soc. 197, 865 (1981); 197, 893 (1981)>
=1981MNRAS.197..865W 1981MNRAS.197..865W
=1981MNRAS.197..893M 1981MNRAS.197..893M
=2015yCat.9016....0W 2015yCat.9016....0W
=1991yCat.7058....0W 1991yCat.7058....0W
ADC_Keywords: X-ray sources ; Surveys
Description:
This catalog lists the high and low latitude X-ray sources observed
with the Sky Survey Instrument on board the ARIEL 5 satellite (UK 5)
as published by Warwick et al. (1981MNRAS.197..865W 1981MNRAS.197..865W) and McHardy et
al. (1981MNRAS.197..893M 1981MNRAS.197..893M). ARIEL 5 scanned the sky for 5.5yrs in the
energy bands 2-18 keV with a time resolution of one orbit (100min
approximately). The fields in the catalog list source name and up to
three alternative names; the error box center and corners in decimal
degrees; average, minimum, and maximum flux and their error; a
variability code; identification; and comments.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
doc.txt 83 395 Original catalog description by S.E. Gessner (ADC)
lowlat.dat 252 109 Low galactic latitude sources (|b|<10°)
(table 2 in Warwick et al. 1981MNRAS.197..865W 1981MNRAS.197..865W)
hilat.dat 242 142 High galactic latitude sources (|b|>10°)
(table 1 in McHardy et al. 1981MNRAS.197..893M 1981MNRAS.197..893M)
refs.dat 338 198 References
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See also:
IX/2 : Second Ariel X-Ray Catalogue (2A) (Cooke+ 1978)
IX/4 : Fourth UHURU Catalogue (4U) (Forman+ 1978)
Byte-by-byte Description of file: lowlat.dat hilat.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [3A]
3- 10 A8 --- 3A Ariel Name (HHMM+DDd)
11- 42 A32 --- Names Alternative Names (1)
43- 48 F6.2 deg RAdeg Right ascension (B1950)
49- 54 F6.2 deg DEdeg Declination (B1950)
55- 60 F6.2 deg RA1.deg ? Error Box Corner #1: R.A. (2)
61- 66 F6.2 deg DE1.deg ? Error Box Corner #1: Dec. (2)
67- 72 F6.2 deg RA2.deg ? Error Box Corner #2: R.A. (2)
73- 78 F6.2 deg DE2.deg ? Error Box Corner #2: Dec. (2)
79- 84 F6.2 deg RA3.deg ? Error Box Corner #3: R.A. (2)
85- 90 F6.2 deg DE3.deg ? Error Box Corner #3: Dec. (2)
91- 96 F6.2 deg RA4.deg ? Error Box Corner #4: R.A. (2)
97-102 F6.2 deg DE4.deg ? Error Box Corner #4: Dec. (2)
103-107 F5.3 deg+2 Area [0/1.5] Area within the 90% confidence contour
108-112 A5 --- Cpos Position Code (3)
113-120 F8.2 ct/s Fav [0.1/4768]?=-99.99 Average Ariel Flux (2-18keV)
121-128 F8.2 ct/s e_Fav [0.04/21]?=-99.99 Error on Average Flux
129-136 F8.2 ct/s Fmin [0/3584]?=-99.99 Minimum Flux
137-144 F8.2 ct/s e_Fmin [0.2/114]?=-99.99 Error on Minimum Flux
145-152 F8.2 ct/s Fmax [1/50000]?=-99.99 Maximum Flux
153-160 F8.2 ct/s e_Fmax [0.1/210]?=-99.99 Error on Maximum Flux
161 A1 --- fV [SIT] Variability Code (4)
162-181 A20 --- Ident Identification of the source (5)
182-256 A75 --- Info Other Information (6)
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Note (1): Up to three other X-ray names are given, separated by a comma (,).
Common X-ray names can be found in 4U (Forman et al., 1978ApJS...38..357F 1978ApJS...38..357F)
and Bradt, Doxsey & Jernigan (1979xras.proc....3B). The designations
are generally derived from observations by the following satellites:
A = Ariel V; both earlier SSI (Sky Skurvey Instrument) and
rotation collimator observations.
2A = Ariel V; see Cooke et al. 1978 (IX/2)
H = HEAO-1; A2 and A3 experiments (IX/7)
1E = Einstein observatory
MX = OSO-7 or SAS-3; see Markert et al. 1976ApJ...208L.115M 1976ApJ...208L.115M
4U = Uhuru; see Forman et al. 1978ApJS...38..357F 1978ApJS...38..357F (IX/4)
Note (2): the four corners of a rectangle enclosing an elliptical
approximation to the 90% contour for the source location.
Note (3):
The position code indicates in what manner the position of the X-ray
source was obtained. Thus, the source positions are not limited to
those derived from SSI (Sky Skurvey Instrument) observations.
The position codes are as follows:
3A = Position based on SSI observations.
X-RAY = Position obtained from other published X-ray observations.
OPT = Position obtained from published observations of the optical
counterpart of the X-ray source.
RAD = Position obtained from published observations of the radio
counterpart of the X-ray source.
References to these published source positions may be found in Bradt
et al. (1979ApJ...230L...5B 1979ApJ...230L...5B) unless a reference identification
enclosed in brackets follows a "POSN" flag in the "Info" column;
these references may be found in the "refs.dat" file.
Note (4): Flux variability codes are assigned as follows:
S = Steady.
The average flux is the weighted mean flux from all observations.
The minimum and maximum flux fields contain no data.
I = Irregular.
The average, minimum, and maximum flux values are listed. These
are sources which the SSI determined to be periodic (e.g. HER X-1).
This class also includes those sources "seen to exhibit flaring where
emission was also observed by the SSI outside of the flares" and
"those with a formal probability <1% that the X-ray light curve
could result from steady X-ray emission."
T = Transient.
Only the maximum flux is listed.
This class includes sources that would generally not be detected by
SSI observations because of their short duration (≤50days).
Such outbursts often exhibit dramatic flux increases, some of which
are recurrent (e.g. A 0535+26). For a transient source, the SSI did
not detect any X-ray emission except for that which was a result of
the outburst.
Note (5): The suggested identification of the X-ray source.
The method by which these were obtained in the high latitude survey
is described in section 5 of McHardy et al. (1981MNRAS.197..893M 1981MNRAS.197..893M).
Otherwise, references to identifications taken from previously
published results are located in the reference file, referenced
in brackets in "Info" column.
The high latitude survey file contains a "star code" within this
field which expresses confidence in the identification (the
supporting evidence may be referenced in the "Info" column):
**** = Almost certain.
*** = Very likely: the source is contained within a
"very small (dimensions ≤1arcmin) error box".
** = Probable: the source is contained within or very close to a
"small (≤0.1deg2) 3A error box or inside a larger 3A error box
and has supporting evidence."
* = Possible: the source identification is a result of positional
coincidence only.
Note (6): the "Info" field mainly contains additional information which is
often followed by a reference identification in brackets. References
for the identification and position code fields are listed in a
similar fashion. The latter is always indicated by a "POSN" flag.
Also listed is any periodic behaviour in the X-ray emission from the
source. Note that "Seyfert" indicates a "Seyfert type I" galaxy,
and "HEXELG" refers to any other type of high extinction emission line
galaxy. It is probable that almost all of the latter are, in fact,
"Seyfert type II" galaxies.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Ref Reference code
5- 23 A19 --- Bibcode 19-digit bibcode (ADS, CDS and NED)
25-339 A315 --- Text Text of reference (includes all authors
and journal reference)
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History:
* September 1991: catalog (VII/58) documented at ADC by Susan E. Gessner,
see the "doc.txt" file.
* 28-May-2015: this ReadMe file was added according to the CDS standards;
references (file "refs.dat") were completed (10 were missing)
and bibcodes added when existing in ADS. References in brackets,
originally dependent on the page (printed on the bottom of each page)
were converted into a unique reference code.
(End) Francois Ochsenbein [CDS] 28-May-2015