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J/AJ/114/2353 AGNs and QSOs behind nearby galaxies (Crampton+, 1997)
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Probes for nearby galaxies.
Crampton D., Gussie G., Cowley A.P., Schmidtke P.C.
<Astron. J. 114, 2353 (1997)>
=1997AJ....114.2353C (SIMBAD/NED BibCode)
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ADC_Keywords: Active gal. nuclei ; QSOs ; Magnitudes ; Redshifts
Abstract:
Data are given for 16 extragalactic objects (predominantly AGN) behind
the Magellanic Clouds and for 146 quasar candidates behind the nearby
galaxies NGC 45, 185, 253, 2366, 2403 and 6822, IC 1613, M31, and M33.
The Magellanic Cloud objects were identified by their X-ray emission,
and precise optical and X-ray positions and optical photometry and
spectra are presented for all of these. The quasar candidates
surrounding the other nearby galaxies were identified through a CFHT
slitless spectral survey. Although redshifts for only eight of these
candidates have been obtained, previous observations indicate that the
majority are likely to be quasars. A subsample of 49 of the brighter
objects could confidently be used, in addition to the Magellanic Cloud
sources, as probes of the gas in nearby galaxies for rotation curve
studies, for studies of their halos, for comparison with higher
redshift QSO absorption lines, or as references for proper motion
studies.
Objects:
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RA (2000) DE Designation(s)
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01 05 05.5 +02 09 39 IC 1613
00 42 45.9 +41 16 18 M 31
01 33 54.0 +30 40 07 M 33
00 39 01.5 +48 20 27 NGC 185
07 28 55.1 +69 12 56 NGC 2366
07 36 54.5 +65 35 58 NGC 2403
00 47 33.2 -25 17 17 NGC 253
00 14 03.8 -23 10 57 NGC 45
19 44 56.2 -14 48 04 NGC 6822
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 93 155 Quasar candidates around nearby galaxies.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Gal Galaxy name
15- 25 A11 --- [CGC97] Quasar candidate designation, HHMM.M+DDMM
([CGC97] JHHMM.M+DDMM in Simbad)
27- 29 A3 --- ID Identification name in the galaxy
31- 32 I2 h RAh Right ascension (J2000)
34- 35 I2 min RAm Right ascension (J2000)
37- 40 F4.1 s RAs Right ascension (J2000)
42 A1 --- DE- Declination sign (J2000)
43- 44 I2 deg DEd Declination (J2000)
46- 47 I2 arcmin DEm Declination (J2000)
49- 50 I2 arcsec DEs Declination (J2000)
52- 55 F4.1 mag jmag POSS plate magnitude
57 I1 --- Class Class
59- 92 A34 --- Com Emission lines and comments (1)
93 A1 --- Note [*] *: Individual note (2)
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Note (1): Estimated wavelengths given in order of decreasing intensity,
tabulated redshifts estimated from grens spectra,
other comments or remarks.
Note (2): NGC 253 - H: identical to MS 00433-2531; z=0.861 (Garilli et al.,
1992AJ....104.1290G)
NGC 253 - S: z=2.521 (Clowes & Savage, 1983MNRAS.204..365C)
IC 1613 - P: z=1.909 (Chaffee et al., 1991AJ....102..461C)
IC 1613 - B: very faint; 2 lines, but wavelength scale uncertain
NGC 2366 - P: z=0.111; [O II], H{beta}, [O III], H{alpha}
NGC 2403 - S: z=1.76; Ly{alpha}, [Si IV], C IV
NGC 2403 - O: z=2.53; Ly{alpha}, Lybeta, C IV
NGC 2403 - R: z=1.924; Ly{alpha}, [N V], [Si IV], C IV, C III];
identical to 0730+65W1; z=1.927 (Tytler & Fan,
1992ApJS...79....1T)
NGC 2403 - D: z=2.24; Ly{alpha}, [Si IV], C IV
NGC 2403 - N: z=2.58; Ly{alpha} [Si IV], C IV
NGC 2403 - Q: quasar with one unidentified line at 4190{AA}
NGC 2403 - U: z=2.81; Ly{alpha}, Lybeta, [N V]
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History: Prepared via OCR at CDS.
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(End) Marie-Jose Wagner, Patricia Bauer [CDS] 23-Mar-1999