J/A+AS/129/455 Dwarf galaxy candidates around interacting galaxies (Deeg+ 1998)
A catalogue of dwarf galaxy candidates around interacting galaxies
Deeg H.J., Munoz-Tunon C., Tenorio-Tagle G., Telles E., Vilchez J.M.,
Rodriguez-Espinosa J.M., Duc P.A., Mirabel I.F
<Astron. Astrophys. Suppl. Ser. 129, 455 (1998)>
=1998A&AS..129..455D 1998A&AS..129..455D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry
Keywords: galaxies: interactions - galaxies: statistics - galaxies: formation
Abstract:
We present results from the imaging of a sample of 12 interacting
galaxies for which we have catalogued all potential dwarf systems in
the vicinity of these strongly interacting galaxies. After careful
cleaning of the images and applying a restrictive S/N criterion we
have identified, measured and catalogued all possible extended objects
in each field. On the frames, covering 11.4x10.5arcmins, on the order
of 100 non-stellar, faint, extended objects were found around each
interacting galaxy. The vast majority (>98%) of these objects had not
been previously identified. The number of expected objects in the
magnitude range R=18-19.5 exceeds the expected count of background
galaxies. This supports the possibility that a density enhancement of
extended objects around some interacting galaxies results from the
addition of a locally formed dwarf galaxy population.
Description:
The tables list positions, sizes and photometry in V and R band of
extended objects found in fields, which include a nearby interacting
galaxy. The tables' filenames are a combination of the table number
and the interacting galaxy's name. The column-descriptions of all
tables are identical, expect that the positional offsets refer to
different reference positions in each table, given in Note (2). These
reference positions are in the center of the interacting galaxy.
Objects:
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RA (2000) DE Designation(s)
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01 24 34.6 +03 47 50 NGC 520
01 59 12 +19 01 NGC 772
02 40 18 +39 04 NGC 1023
03 14 07.2 -02 48 52 NGC 1253
07 14 24 +73 29 Arp 141
08 11 13.4 +25 12 26 NGC 2535
08 11 16.1 +25 10 45 NGC 2536
08 38 24 +25 45 NGC 2623
09 14 06 +40 08 NGC 2782
10 23 27.3 +19 53 55 NGC 3226
10 23 30.5 +19 51 54 NGC 3227
11 23 36 +53 51 NGC 3656
11 28 33.6 +58 33 51 NGC 3690
11 51 06.0 +55 04 39 NGC 3921
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
t4n520.dat 76 85 Extended objects near NGC 520
t5n772.dat 76 119 Extended objects near NGC 772
t6n1023.dat 76 21 Extended objects near NGC 1023
t7n1253.dat 76 44 Extended objects near NGC 1253
t8a141.dat 76 183 Extended objects near Arp 141
t9n2535.dat 76 120 Extended objects near NGC 2535/6
t10n2623.dat 76 113 Extended objects near NGC 2623
t11n2782.dat 76 93 Extended objects near NGC 2782
t12n3226.dat 76 156 Extended objects near NGC 3226/7
t13n3656.dat 76 257 Extended objects near NGC 3656
t14n3690.dat 76 116 Extended objects near NGC 3690
t15n3921.dat 76 137 Extended objects near NGC 3921
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Byte-by-byte Description of files: t*.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID + Identification number
7- 12 F6.2 arcsec hmaj Major halfaxis
15- 20 F6.2 arcsec hmin Minor halfaxis
23- 28 F6.2 deg PA [-90,90] Position Angle
31- 36 F6.2 mag Vmag ?=99.99 V magnitude (1)
39- 44 F6.2 mag e_Vmag ?=99.99 V magnitude error
47- 52 F6.2 mag Rmag ?=99.99 R magnitude (1)
55- 60 F6.2 mag e_Rmag ?=99.99 R magnitude error
62- 68 F7.1 arcsec oRA Positional offset in Right ascension (2)
71- 76 F6.1 arcsec oDE Positional offset in Declination (2)
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Note (1): The NULL value (99.99) indicates that no photometric values are
available. The value -99.99 indicates an oversaturated (too bright)
object
Note (2): The positional offsets are relative to the reference positions
given in the paper's Table 1. They are reproduced here:
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File Galaxy RA (J2000) DE
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t4n520.dat NGC 520 1 24 35.33 3 47 37.0
t5n772.dat NGC 772 1 59 19.60 19 0 27.9
t6n1023.dat NGC 1023 2 40 24.09 39 3 45.9
t7n1253.dat NGC 1253 3 14 9.11 -2 49 22.2
t8a141.dat ARP 141 7 14 20.58 73 28 36.2
t9n2535.dat NGC 2535 8 11 14.60 25 11 36.0
t10n2623.dat NGC 2623 8 38 23.98 25 45 17.0
t11n2782.dat NGC 2782 9 14 5.08 40 6 49.4
t12n3226.dat NGC 3226 10 23 28.82 19 52 53.5
t13n3656.dat NGC 3656 11 23 38.43 53 50 30.9
t14n3690.dat NGC 3690 11 28 31.87 58 33 45.2
t15n3921.dat NGC 3921 11 51 6.63 55 4 45.0
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Acknowledgements: Hans-Jorg Deeg
(End) Deeg [IAC], Patricia Bauer [CDS] 13-Jan-1998