J/A+A/421/455 Interplanetary Scintillation Pushchino Survey II (Kopylov+, 2004)
Investigation of radio sources from the interplanetary scintillation Pushchino
Survey. II. Optical identification.
Kopylov A.I., Artyukh V.S., Kopylova F.G.
<Astron. Astrophys., 421, 455-459 (2004)>
=2004A&A...421..455K 2004A&A...421..455K
ADC_Keywords: QSOs ; Radio sources ; Active gal. nuclei ; Cross identifications;
Photometry ; Redshifts
Keywords: catalogs - radio continuum: galaxies - galaxies: quasars: general -
galaxies: photometry - surveys
Abstract:
We present the results of optical identification of 248 interplanetary
scintillating (IPS) radio sources from the Pushchino Survey (PS) in
the area of 0.11sr with the center at RA=10h28m, DE=+41°. All 260
counterparts of IPS radio sources from the 7C and FIRST catalogues,
which had been found in Paper I (Cat. J/A+A/403/555), were
considered. We used USNO-B1.0 catalogue (limiting magnitude mR∼21)
for the optical identification and searched the literature to find
optical data for fainter objects. Photometric and spectroscopic
observations were conducted on the 1m and 6m telescopes of SAO RAS.
Optical magnitudes or deep limits for 22 objects and redshifts for 26
ones have been obtained. In total, we collected optical data for 116
(68 with redshift) counterparts of the PS radio sources. For the
subsample of the PS quasars (41 objects) the redshift distribution was
compared to those of several other samples of quasars (BRL, 3CRR, MQS,
B3-VLA, 7CRS I-III and PKS 0.25Jy) which have complete or nearly
complete redshift information.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 89 116 R-band magnitudes and redshifts for PS radio sources
refs.dat 108 28 References
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See also:
VIII/67 : Catalogue of scintillating radio sources (Artyukh+, 1996-1998)
J/A+A/403/555 : Interplanetary Scintillation Pushchino Survey (Artyukh+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- PS Name of the IPS radio source (1)
4 A1 --- C Rank in angular distance of 7C-counterpart
from the IPS radio source (2)
6- 7 I2 h RAh Optical counterpart right ascension (1950)
9- 10 I2 min RAm Optical counterpart right ascension (1950)
12- 16 F5.2 s RAs Optical counterpart right ascension (1950)
18 A1 --- DE- Declination sign (1950)
19- 20 I2 deg DEd Optical counterpart declination (1950)
22- 23 I2 arcmin DEm Optical counterpart declination (1950)
25- 28 F4.1 arcsec DEs Optical counterpart declination (1950)
30- 31 I2 --- r_pos Reference to optical position, in refs.dat file
33- 36 F4.2 Jy S102MHz Flux density at 102MHz of IPS radio source
38- 43 F6.3 Jy S151MHz Integrated flux density at 151MHz from
the 7C catalogue
45 A1 --- l_Rcmag Limit flag for lower magnitude limits
46- 50 F5.2 mag Rcmag Cousins R-band magnitude of optical counterpart
51 A1 --- u_Rcmag Uncertainty sign for uncertain magnitude
53- 64 A12 --- Band Original band(s) of observations (3)
66 A1 --- n_Rcmag [b-e] Note to magnitude measurement
or its transformation to R-band (4)
68- 72 F5.3 --- z ? Redshift of the optical counterpart
73 A1 --- u_z [:?] uncertainty sign for uncertain
or doubtful redshifts
75- 76 A2 --- Type [GQ EF] Type of the optical counterpart,
G: galaxy, Q: quasar, EF: empty field
77 A1 --- u_Type [?] uncertainty sign for uncertain types
79- 83 A5 --- r_Rcmag Reference to magnitude, in refs.dat file
85- 89 A5 --- r_z Reference to redshift, in refs.dat file
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Note (1): Name corresponding to its sequential number in the original
catalog (Artyukh et al., 1998, Cat. VIII/67)
Note (2): Rank in angular distance code:
a, b, c, d, e, f = distance rank for objects within 15'
u = unique object within 15' circle
S, E, W = rough direction for objects outside 15' circle.
Note (3): Magnitude measured in a given band was transformed to the
magnitude in R-band according to following rules:
- if two bands are given then an average was calculated;
R, R1 and R2 magnitudes were taken as measured (R1 from POSS-I,
B2 and R2 from POSS-II);
- for r-magnitudes a zero-point correction R=r-0.4 was adopted;
- for PS028a a typical colour of quasars B-R=0.5 was assumed;
- for radiogalaxies PS102a, PS109a, PS121a, PS193a, PS250a, PS251a
and PS287a transformation to R-band was made using colours of
an elliptical galaxy at appropriate redshift according to
the chemically consistent evolutionary synthesis model
(Bicker et al., 2004A&A...413...37B 2004A&A...413...37B);
- for radiogalaxies PS164a, PS205d and PS217u, with measured
magnitude in K-band only, a lower limit for their colour, R-K>3,
was adopted as a conservative one for radiogalaxies at their
z∼1.8 (e.g. Jarvis et al., 2001MNRAS.326.1585J 2001MNRAS.326.1585J)
Note (4): Note to magnitude measurement have the following meaning::
b = Uncertain magnitude, possible strongly variable object
c = Our rough estimation of magnitude from the equivalent width
and flux of the emission line [OII]3727Å
d = The magnitude was measured by us from the CCD frame obtained on
the 2.6m telescope in the Byurakan observatory by M. Ogannisyan
e = Rough estimation of magnitude for we suppose the galaxy, which is
blended with a star confirmed by our spectroscopic observations
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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- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 50 A27 --- Aut Author' sname
52-108 A57 --- Com Comments
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Acknowledgements: Alexander Kopylov, akop(at)sao.ru
(End) Patricia Vannier [CDS] 25-Jan-2005