J/A+AS/115/97 Positions of 790 AGNs (Veron-Cetty+, 1996)
Astrometry with the Digitized Sky Survey. Positions of 790 AGNs
Veron-Cetty M.-P., Veron P.
<Astron. Astrophys. Suppl. Ser. 115, 97 (1996)>
=1996A&AS..115...97V 1996A&AS..115...97V (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; QSOs ;
Keywords: astrometry - galaxies: active - quasars
Description:
From the measurement on the Digitized Sky Survey of the optical
position of 153 QSOs with an accurate VLBI position, we have
determined that the r.m.s. uncertainties of these measurements is
about 0.6 arcsec in both coordinates over the whole sky, except for
objects located near the edge of the plates.
We have measured the optical position of 790 AGNs (or AGNs
candidates). For many of these objects, the accuracy of the published
optical position was one arcminute or worst.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 68 159 Optical J2000 position for 153 QSOs with
absolute VLBI position.
table2 104 791 Optical position for 790 AGNs (and AGN
candidates)
refs 80 187 References for table2
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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2- 17 A16 --- Name Name of the source
18- 19 I2 h RAh Right Ascension J2000 (hours) (optical)
21- 22 I2 min RAm Right Ascension J2000 (minutes)
24- 28 F5.2 s RAs Right Ascension J2000 (seconds)
30 A1 --- DE- Declination J2000 (sign)
31- 32 I2 deg DEd Declination J2000 (degrees)
34- 35 I2 arcmin DEm Declination J2000 (minutes)
37- 40 F4.1 arcsec DEs Declination J2000 (seconds)
45- 48 F4.1 arcsec dRA optical - radio right ascension
51- 54 F4.1 arcsec dDE optical - radio declination
57- 61 F5.1 cm Xpos Rectangular coordinate toward East
measured from the centre of the plate
64- 68 F5.1 cm Ypos Rectangular coordinate toward North
measured from the centre of the plate
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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2- 17 A16 --- Name Name of the source
18- 19 I2 h RA1950h Right Ascension B1950 (hours)
21- 22 I2 min RA1950m Right Ascension B1950 (minutes)
24- 28 F5.2 s RA1950s Right Ascension B1950 (seconds)
30 A1 --- DE1950- Declination B1950 (sign)
31- 32 I2 deg DE1950d Declination B1950 (degrees)
34- 35 I2 arcmin DE1950m Declination B1950 (minutes)
37- 40 F4.1 arcsec DE1950s Declination B1950 (seconds)
43- 44 I2 h RAh Right Ascension J2000 (hours)
46- 47 I2 min RAm Right Ascension J2000 (minutes)
49- 53 F5.2 s RAs Right Ascension J2000 (seconds)
56 A1 --- DE- Declination J2000 (sign)
57- 58 I2 deg DEd Declination J2000 (degrees)
60- 61 I2 arcmin DEm Declination J2000 (minutes)
63- 66 F4.1 arcsec DEs Declination J2000 (seconds)
69- 73 F5.1 cm Xpos Rectangular coordinate toward East
measured from the centre of the plate
75- 79 F5.1 cm Ypos Rectangular coordinate toward North
measured from the centre of the plate
82- 84 I3 --- FC [1/174]? Reference for the finding chart
(see file "refs")
86- 90 A5 --- Note [()1-8C*, ] Remarks (1)
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Note (1):
C indicates that the position has been measured with the cursor rather
than with a Gaussian fitting routine.
* indicates that the object is located near the edge of the plate
( |X| or |Y| > 14.7 cm )
1 double sep. 3"
2 weak object at 5.0" N
3 extended
4 double sep. 4"
5 double object
6 weak object at 3.8"
7 object at 6.0" N
8 weak object at 3.5" NW
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Byte-by-byte Description of file: refs
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Bytes Format Units Label Explanations
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1- 3 I3 --- FC [1/174]?+ Reference as in table2,
blank for continuation
5- 80 A76 --- Text Text of reference
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Courtesy: Mira Veron
(End) Francois Ochsenbein [CDS] 13-Jul-1995