J/A+A/533/A122 Diffuse neutral hydrogen in HIPASS (Popping+, 2011)
Diffuse neutral hydrogen in the H I Parkes All Sky Survey.
Popping A., Braun R.
<Astron. Astrophys., 533, A122 (2011)>
=2011A&A...533A.122P 2011A&A...533A.122P
ADC_Keywords: Galaxy catalogs ; H I data ; Radial velocities
Keywords: galaxies: formation - galaxies: halos - intergalactic medium
Abstract:
Observations of neutral hydrogen can provide a wealth of information
about the distribution and kinematics of galaxies. To learn more about
large scale structures and accretion processes, the extended
environment of galaxies must also be observed. Numerical simulations
predict a cosmic web of extended structures and gaseous filaments.
To detect HI beyond the ionisation edge of galaxy disks, column
density sensitivities have to be achieved that probe the regime of
Lyman limit systems. Typically HI observations are limited to a
brightness sensitivity of NHI∼1019cm-2 but this has to be
improved by at least an order of magnitude.
Description:
In this paper, reprocessed data is presented that was originally
observed for the HI Parkes All Sky Survey (HIPASS). The data is
described in detail in Barnes et al. (2001MNRAS.322..486B 2001MNRAS.322..486B). HIPASS
provides complete coverage of the region that has been observed for
the Westerbork Virgo Filament HI Survey (WVFS), presented in
accompanying papers, and thus is an excellent product for data
comparison. The region of interest extends from 8 to 17 hours in right
ascension and from -1 to 10 degrees in declination. Although the
original HIPASS product already has good flux sensitivity, the
sensitivity and noise characteristics can be significantly improved
with a different processing method.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 203 Observed properties of HI detections in
reprocessed HIPASS data within the Westerbork
Virgo Filament Survey region
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See also:
VIII/73 : HI Parkes All Sky Survey Catalogue (HIPASS) (Meyer+, 2004)
VIII/89 : Northern HI Parkes All Sky Survey Catalogue (HIPASS) (Wong+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [HIR]
5- 13 A9 --- HIR HIR name (HHMM+DDMM) (1)
17- 40 A24 --- OName Optical ID (or No object found)
44- 59 A16 --- HIPASS HIPASS name (JHHMM+DDs) or new or ALFALFA (2)
61- 62 I2 h RAh Right ascension (J2000)
64- 65 I2 min RAm Right ascension (J2000)
67- 68 I2 s RAs Right ascension (J2000)
70 A1 --- DE- Declination sign (J2000)
71- 72 I2 deg DEd Declination (J2000)
74- 75 I2 arcmin DEm Declination (J2000)
77- 78 I2 arcsec DEs Declination (J2000)
80- 83 I4 km/s HV Heliocentric velocity
84 A1 --- f_HV [u] flag for underestimated flux and W20 (3)
86- 88 I3 km/s W20 Velocity width at 20% of the peak flux
89 A1 --- f_W20 [u] flag for underestimated flux and W20 (3)
91- 95 F5.1 Jy.km/s Sint Integrated flux (3D: velocity and pixels)
96 A1 --- f_Sint [u] flag for underestimated flux and W20 (3)
98-102 F5.1 Jy.km/s Sline Integrated line-strength (1D: velocity)
103 A1 --- f_Sline [u] flag for underestimated flux and W20 (3)
105 A1 --- Det [AV] Detection by automatic source finder (A)
or by visual inspection (V).
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Note (1): HIR is an abbreviation of HIPASS Reprocessed.
Note (2): Completely new HI detections are indicated by "new".
In the case a detection is not mentioned in the HIPASS catalogue
however is detected by ALFALFA, this is indicated with "ALFALFA".
Note (3): u = The flux and line-width values are underestimated as
the object is at the edge of the processed bandwidth.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Dec-2011