J/AJ/151/52 The HIZOA-S survey (Staveley-Smith+, 2016)
The Parkes H I zone of avoidance survey.
Staveley-Smith L., Kraan-Korteweg R.C., Schroder A.C., Henning P.A.,
Koribalski B.S., Stewart I.M., Heald G.
<Astron. J., 151, 52 (2016)>
=2016AJ....151...52S 2016AJ....151...52S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Radial velocities ; H I data
Keywords: galaxies: distances and redshifts - galaxies: fundamental parameters -
large-scale structure of universe - surveys
Abstract:
A blind HI survey of the extragalactic sky behind the southern Milky
Way has been conducted with the multibeam receiver on the 64m Parkes
radio telescope. The survey covers the Galactic longitude range
212°<l<36° and Galactic latitudes |b|<5° to an rms
sensitivity of 6mJy per beam per 27km/s channel and yields 883
galaxies to a recessional velocity of 12000km/s. The survey covers the
sky within the HI Parkes All-Sky Survey (HIPASS) area to greater
sensitivity, finding lower HI mass galaxies at all distances, and
probing more completely the large-scale structures at and beyond the
distance of the Great Attractor. Fifty-one percent of the HI
detections have an optical/near-infrared (NIR) counterpart in the
literature. A further 27% have new counterparts found in existing, or
newly obtained, optical/NIR images. The counterpart rate drops in
regions of high foreground stellar crowding and extinction, and for
low HI mass objects. Only 8% of all counterparts have a previous
optical redshift measurement. The HI sources are found independently
of Galactic extinction, although the detection rate drops in regions
of high Galactic continuum. The survey is incomplete below a flux
integral of approximately 3.1Jy/km/s and mean flux density of
approximately 21mJy, with 75% and 81% of galaxies being above these
limits, respectively. Taking into account dependence on both flux and
velocity width, and constructing a scaled dependence on the flux
integral limit with velocity width (w0.74), completeness limits of
2.8Jy/km/s and 17mJy are determined, with 92% of sources above these
limits. A notable new galaxy is HIZOA J1353-58, a possible companion
to the Circinus galaxy. Merging this catalog with the similarly
conducted northern extension, large-scale structures are delineated,
including those within the Puppis and Great Attractor regions and the
Local Void. Several newly identified structures are revealed here for
the first time. Three new galaxy concentrations (NW1, NW2, and NW3)
are key in confirming the diagonal crossing of the Great Attractor
Wall between the Norma Cluster and the CIZA J1324.7-5736 cluster.
Further contributors to the general mass overdensity in that area are
two new clusters (CW1 and CW2) in the nearer Centaurus Wall, one of
which forms part of the striking 180° (100h-1Mpc) long filament
that dominates the southern sky at velocities of ∼3000 km/s, and the
suggestion of a further wall at the Great Attractor distance at
slightly higher longitudes.
Description:
The observations described here were taken with the 21cm multibeam
receiver at the 64m Parkes radio telescope between 1997 March 22 and
2000 June 8, contemporaneously with the southern component of HIPASS.
The observations cover the Galactic longitude range 212°<l<36°
in 23 separate regions, each 8° wide in longitude, and cover the
latitude range 5°>b>-5° with almost uniform sensitivity.
The observational parameters are identical to those described in
Donley et al. 2005 (cat. J/AJ/129/220), but are summarized in Table1
(see the text) for completeness.
The central observing frequency was 1394.5MHz with a bandwidth of
64MHz and a channel spacing of 62.5kHz. This corresponds to a velocity
range of -1280<cz<12740km/s and a channel spacing of 13.2km/s at
zero redshift. After Hanning smoothing, the velocity resolution was
27km/s. The correlator integration time was 5s, resulting in
negligible smearing along the scan direction.
Table2 lists HI parameters and derived quantities for the galaxies.
The counterparts are listed in Table3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 105 883 *HI and derived parameters
table3.dat 126 918 Cross-matches of the HI detections
notes.dat 997 131 Notes to individual detections
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Note on table2.dat: We report on a 21cm HI survey of the southern hemisphere
Zone Of Avoidance (ZOA). We refer to this survey as HIZOA-S.
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See also:
VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
J/MNRAS/443/41 : Deep NIR photometry of HI galaxies in ZoA (Williams+, 2014)
J/AJ/129/220 : HI Parkes Zone of Avoidance Survey (Donley+, 2005)
J/AJ/124/1954 : 1000 brightest HIPASS galaxies catalog (Ryan-Weber+, 2002)
J/AJ/124/690 : H I-selected galaxies in South Celestial Cap (Kilborn+, 2002)
J/AJ/113/905 : HI observations of galaxies (Pantoja+ 1997)
J/A+AS/117/369 : Galaxies in the "zone of avoidance". III. (Lercher+, 1996)
J/A+AS/117/1 : Galaxies in the "zone of avoidance". II. (Seeberger+, 1996)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- HIZOA The HI Zone of Avoidance (HIZOA) identifier
(JHHMM-DD format) (G1)
11 A1 --- f_HIZOA [*] Flag '*' means HIZOA identifier is affected
by improved positional change
13- 14 I2 h RAh Hour of Right Ascension (J2000) (1)
16- 17 I2 min RAm Minute of Right Ascension (J2000) (1)
19- 22 F4.1 s RAs Second of Right Ascension (J2000) (1)
24 A1 --- DE- Sign of the Declination (J2000) (1)
25- 26 I2 deg DEd Degree of Declination (J2000) (1)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000) (1)
31- 32 I2 arcsec DEs Arcsecond of Declination (J2000) (1)
34- 39 F6.2 deg GLON [1/360] Galactic longitude
41- 45 F5.2 deg GLAT [-5.8/5.8] Galactic latitude
47- 51 F5.2 mag E(B-V) [0.1/22.5] The (B-V) color excess (2)
53- 57 I5 km/s HRV [224/11883] Heliocentric radial velocity
59- 60 I2 km/s e_HRV [2/26] Uncertainty in RV
62- 64 I3 km/s W50 [17/699] Line width at half peak flux
density (3)
66- 67 I2 km/s e_W50 [4/52] Uncertainty in W50
69- 71 I3 km/s W20 [24/730]? Line width at 20% peak flux
density (3)
73- 74 I2 km/s e_W20 [7/78]? Uncertainty in W20
76- 81 F6.1 Jy.km/s FHI [0.6/1710] HI flux integral
83- 87 F5.1 Jy.km/s e_FHI [0.4/153] Uncertainty in FHI
89- 93 I5 km/s vLG [-2/11964] Galaxy velocity vLG (4)
95- 99 F5.1 Mpc Dist [1.5/159.5] Distance to the galaxy (based on
vLG and H0=75km/s/Mpc)
101-105 F5.2 [Msun] logMHI [6.8/10.8] Log HI mass
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Note (1): Of the fitted position.
Note (2): As derived from the IRAS/DIRBE maps (Schlegel et al.,
1998ApJ...500..525S 1998ApJ...500..525S) and corrected with a factor of 0.86 as derived by
Schlafly et al. (2011ApJ...737..103S 2011ApJ...737..103S).
Note (3): Corrected for instrumental broadening.
Note (4): Corrected to the Local Group frame of reference via:
vLG=HRV+300 sin(GLON)*cos(GLAT).
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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 A1 --- Type [a-c] Counterpart type (a, b, or c) (1)
3- 11 A9 --- HIZOA The HI Zone of Avoidance (HIZOA) identifier
(JHHMM-DD format as in Table2) (G1)
13- 18 F6.2 deg GLON [1/360] Galactic longitude of HI detection
20- 24 F5.2 deg GLAT [-5.8/5.8] Galactic latitude of HI detection
26- 30 F5.1 Mpc Dist [1.5/159.5] Distance to the HI galaxy (based on
vLG and H0=75km/s/Mpc)
32- 36 F5.2 [Msun] logM [6.8/10.8] Log HI mass
38- 41 F4.1 mag AB [0.6/92.8] The B band extinction (converted from
E(B-V) given in Table2 using RB=4.14)
42 A1 --- f_AB [*] Flag '*' on AB denotes an extinction value
deemed to be uncertain during the search (e.g.,
due to high spatial variability)
44- 46 A3 --- Cl Classification of counterpart ("d"=definite,
"p"=probable, "a"=ambiguous, "c"=confused
candidate, or "-"=no candidate)
48 A1 --- I Counterpart in IRAS Point Source Catalog
(cat. II/125)
50 A1 --- M [M] Counterpart in 2MASX catalog (cat. VII/233)
52 A1 --- W [W] Counterpart in IRSF catalog (Williams et al.
2014, cat. J/MNRAS/443/41)
54 A1 --- H [Hh] Counterpart in HIPASS catalogs (H or h) (2)
56 A1 --- S [S] Counterpart in HI Parkes ZOA shallow survey
(HIZSS; Henning et al. 2000AJ....119.2686H 2000AJ....119.2686H)
58 A1 --- Z [Z] Counterpart in earlier HIZOA publication
(Juraszek et al. 2000AJ....119.1627J 2000AJ....119.1627J, Donley et
al. 2005, cat. J/AJ/129/220)
60 A1 --- o [ox] Optical literature velocity (NED and
HyperLEDA) ("o"=optical, and, in one case,
"x"=X-ray) (3)
62 A1 --- h [h] HI flag (h) (4)
64 A1 --- l [NSw] Source of name and coordinates ("N"=listed
in NED, S=listed in SIMBAD) (5)
66 A1 --- c [Sc] Flag 'c' means coordinates measured on DSS
or NIR images (6)
68 A1 --- N [n] Note in the appendix
70- 71 I2 h RAh ? Hour of Right Ascension of counterpart (J2000)
73- 74 I2 min RAm ? Minute of Right Ascension of counterpart (J2000)
76- 80 F5.2 s RAs ? Second of Right Ascension (J2000)
81 A1 --- u_RAs [:] Uncertainty flag on RAs (:)
83 A1 --- DE- Sign of the Declination of counterpart (J2000)
84- 85 I2 deg DEd ? Degree of Declination of counterpart (J2000)
87- 88 I2 arcmin DEm ? Arcminute of Declination of counterpart (J2000)
90- 93 F4.1 arcsec DEs ? Arcsecond of Declination of counterpart (J2000)
94 A1 --- u_DEs [:] Uncertainty flag on DEs (:)
96-100 F5.2 arcmin Sep [0/11.9]? Distance between the HI fitted position
and the counterpart position
102 A1 --- u_OName [:] Uncertainty flag on OName (:)
104-126 A23 --- OName Other literature identifier (in this order of
preference: NGC, ESO, RKK/WKK, CGMW, 2MASS,
others)
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Note (1): Note that for "b" and "c" there are two rows per HI detection where
in each second row the first six columns are repeated to make the table
easier to read by a computer.
a = HI detections with single cross-matches or no counterpart;
b = HI detections with more than one cross-match. In this case, more than
one galaxy is assumed to contribute to the HI profile (note that where
the confusing partner was another of our HI detections we do not
list them separately);
c = HI detections with ambiguous cross-matches. More than one candidate
was found but, judged by the profile, only ONE OF THEM is the likely
counterpart.
Note (2): Flag for counterpart in HIPASS defined as below:
H = HIPASS catalogs (South, Meyer et al. 2004 (cat. VIII/73); North, Wong
et al. 2006 (cat. VIII/89);
h = Other HIPASS publications (Kilborn et al. 2002, cat. J/AJ/124/690), and
Ryan-Weber et al. 2002, cat. J/AJ/124/1954).
Note (3): NED=http://ned.ipac.caltech.edu/, and
HyperLEDA=http://leda.univ-lyon1.fr/.
Note (4): Note that Juraszek et al. (2000AJ....119.1627J 2000AJ....119.1627J) and Henning et al.
(2000AJ....119.2686H 2000AJ....119.2686H) are not included here since their HI parameters are
not independent of ours, but see flags in the S and Z columns.
Note (5): Our main literature search to find counterparts for the HI detections
was done using the NASA/IPAC Extragalactic Database (NED;
http://ned.ipac.caltech.edu/). We submitted a list of the HI detections
through the NED batch service using a 4.5' search radius (status 2013
August). For comparison, we also conducted a search with the SIMBAD
(http://simbad.u-strasbg.fr/simbad/) Astronomical Database. There were only
a couple of cases in which SIMBAD had a galaxy listed but NED did not.
Note (6): For the visual search to find counterparts for the HI detections, we
downloaded images from the SuperCOSMOS Sky Surveys
(http://www-wfau.roe.ac.uk/sss/) (B band), the Digitized Sky Surveys (DSS;
http://www3.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/en/dss/) (R and I band), 2MASS
http://irsa.ipac.caltech.edu/applications/2MASS/) (Ks band), as well as
UKIDSS (http://surveys.roe.ac.uk/wsa/) and VISTA wherever possible (mainly
Ks-band, but if not available, we used the band closest in wavelength).
Finally, we added Ks-band images (as well as in J or H when necessary)
that were obtained at the Infrared Survey Facility at Sutherland (IRSF) for
the purpose of extracting photometry on all galaxies within the HIZOA
search circles. A first set of this catalog was published by Williams et
al. 201 (cat. J/MNRAS/443/41), and the rest is in preparation (Said et al.
2015MNRAS.447.1618S 2015MNRAS.447.1618S). Note that some published coordinates were not
centered properly so we give the measured ones.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- HIZOA The HI Zone of Avoidance (HIZOA) identifier
(JHHMM-DD format) (G1)
11-997 A987 --- Note Notes to individual detection
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Global Notes:
Note (G1): HIZOA galaxies in the Great Attractor region which were first
reported by Juraszek et al. (2000AJ....119.1627J 2000AJ....119.1627J) and in HIZOA-N (Donley et
al. 2005, cat. J/AJ/129/220) retain their original names, even if the
position measurement has been improved by this survey.
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History:
From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 27-Jul-2016