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
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). 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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 105 203 Observed properties of HI detections in reprocessed HIPASS data within the Westerbork Virgo Filament Survey region
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
Bytes Format Units Label Explanations
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).
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.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Dec-2011
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