J/MNRAS/443/1044 GBT HI observations of 1194 spirals (Masters+, 2014)
2MTF. III. HI 21 cm observations of 1194 spiral galaxies with the
Green Bank Telescope.
Masters K.L., Crook A., Hong T., Jarrett T.H., Koribalski B.S., Macri L.,
Springob C.M., Staveley-Smith L.
<Mon. Not. R. Astron. Soc., 443, 1044-1056 (2014)>
=2014MNRAS.443.1044M 2014MNRAS.443.1044M
ADC_Keywords: Surveys ; Galaxies, radio ; H I data
Keywords: catalogues - galaxies: distances and redshifts -
galaxies: kinematics and dynamics - galaxies: spiral -
radio lines: galaxies
Abstract:
We present HI 21cm observations of 1194 galaxies out to a redshift of
10000km/s selected as inclined spirals (i≳60°) from the
2MASS redshift survey. These observations were carried out at the
National Radio Astronomy Observatory Robert C. Byrd Green Bank
Telescope (GBT). This observing programme is part of the 2MASS
Tully-Fisher (2MTF) survey. This project will combine Hi widths from
these GBT observations with those from further dedicated observing at
the Parkes Telescope, from the Arecibo Legacy Fast Arecibo L-band Feed
Array survey at Arecibo, and S/N>10 and spectral resolution
vres<10km/s published widths from a variety of telescopes. We will
use these Hi widths along with 2MASS photometry to estimate
Tully-Fisher distances to nearby spirals and investigate the peculiar
velocity field of the local Universe. In this paper, we report on
detections of neutral hydrogen in emission in 727 galaxies, and
measure good signal to noise and symmetric HI global profiles suitable
for use in the Tully-Fisher relation in 484.
Description:
In this paper, we present new HI observations for 1194 galaxies
using the Robert C. Byrd Green Bank Radio Telescope (GBT). These
observations result in 727 HI detections and 484 high-quality HI
widths suitable for use in the 2MTF survey. Hong et al. (2013, Cat.
J/MNRAS/432/1178) presented the results of a companion Parkes Radio
Telescope programme to fill in observations in the southern region. In
future work, we will combine these data to study the peculiar
velocities of galaxies in the local universe (e.g. Hong et al.,
2014MNRAS.445..402H 2014MNRAS.445..402H).
We present results from 368h of GBT time in the 06A, 06B and, 06C
semesters (2006 February to 2007 February) as well as 96h in GBT08B
(2008 June-August).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 114 484 HI parameters of good detections
(high S/N and not confused/disturbed)
tableb2.dat 66 244 HI parameters of all other detected galaxies
tableb3.dat 26 467 List of non-detections
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See also:
J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)
J/MNRAS/432/1178 : 2MTF. HI observations of 303 southern galaxies (Hong+, 2013)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2MASX 2MASX ID (HHMMSSss+DDMMSSs, J2000)
18- 26 F9.5 deg RAdeg Right ascension (J2000)
28- 36 F9.5 deg DEdeg Declination (J2000)
37- 41 I5 km/s V2mrs [1052/10976] 2MRS heliocentric redshift (G1)
43- 44 I2 --- TT [-2/98]?=99 Morphological T type (1)
46- 49 F4.2 --- b/a [0/0.5] Axis ratio
51- 56 F6.2 Jy.km/s FHI [0.7/68]?=-99.99 Observed integrated
21cm line flux
58- 61 F4.2 Jy.km/s e_FHI [0.07/0.36]?=0 rms uncertainty on FHI
63- 67 I5 km/s VHI [1037/10837] Heliocentric redshift of the
detected 21cm line taken as the mid-point of
the 50% level of the profile in WP50 method
69- 71 I3 km/s WF50 [94/748] Width of the 21cm line measured at
50% peak-rms on a polynomial fit to both
sides of the profile (corrected)
73- 75 I3 km/s WM50 [104/778] Width of the 21cm line measured at
50% of the mean flux value in the profile
77- 79 I3 km/s W2P50 [90/731] Width of the 21cm line measured at
20% of the mean of the 2 peak values
81- 84 I4 km/s WP50 [70/728]?=-999 Width of the 21cm line measured
at 50% of the peak flux value
86- 88 I3 km/s WP20 [109/845] Width of the 21cm line measured at
20% of the peak flux value
90- 92 I3 km/s e_WF50 [1/113] rms uncertainty on WF50
94- 96 I3 km/s Wc [84/767] HI line width after making all
corrections discussed in Section 3.2 (2)
98-102 F5.1 km/s e_Wc [2/115] rms uncertainty on Wc
104-108 F5.1 --- S/N [3.4/811] Peak signal-to-noise ratio of
21cm line
110-114 F5.3 --- lambda [0.01/0.4] Velocity width instrumental
parameter λ (2)
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Note (1): Morphological-type code following the RC3 system. Classification as
collated by 2MRS (Huchra et al., 2012ApJS..199...26H 2012ApJS..199...26H, Cat. J/ApJS/199/26).
Galaxies with T = 98 or 19 (meaning unclassified galaxy) were visually
inspected and confirmed to be inclined spirals.
Note (2): The correction for instrumental effects and cosmology (Eq.(8) in
Springob et al., 2005ApJS..160..149S 2005ApJS..160..149S, Cat. VIII/77) is given by
Wc = ([(WF50-2Δvλ)/(1+z)]-Δt)/sini, where
Δv is the velocity resolution of the spectrum (5.15km/s),
z is the observed redshift, λ is a factor describing the broadening
of the spectrum due to S/N issues, and Δt is the correction for
turbulent motions (Δt=6.5km/s)
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- 2MASX 2MASX ID (HHMMSSss+DDMMSSs)
18- 21 I4 km/s V2mrs [680/9925] 2MRS heliocentric redshift (G1)
23- 27 F5.2 Jy.km/s FHI [0.2/16] Observed integrated 21cm line flux
29- 32 F4.2 Jy.km/s e_FHI [0.05/0.5] rms uncertainty on FHI
34- 37 I4 km/s VHI [703/9944] Heliocentric redshift of the
detected 21cm line taken as the mid-point of
the 50% level of the profile with WP50 method
39- 42 I4 km/s WF50 [71/928]?=-999 Width of the 21cm line measured
ar 50% peak-rms on a polynomial fit to both
sides of the profile
44- 47 F4.1 --- S/N [2.6/54] Signal-to-noise ratio
49- 66 A18 --- Com Comments (1)
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Note (1): Comments as follows:
s = single peaked
c = confused
d = disturbed
b = not all in beam
e = near edge of bandpass
r = significant RFI removed from within profile
nt = not intended target
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Byte-by-byte Description of file: tableb3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- 2MASX 2MASX ID (HHMMSSss+DDMMSSs)
18- 22 I5 km/s V2mrs [334/10480] 2MRS heliocentric redshift (G1)
24- 26 F3.1 mJy rms [1.2/5.4] rms noise
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Global Notes:
Note (G1): 2MRS = 2MASS Reshift Survey, Huchar et al. 2012 (J/ApJS/199/26)
History:
From electronic version of the journal
References:
Masters et al., Paper I 2008AJ....135.1738M 2008AJ....135.1738M
Hong et al., Paper II 2013MNRAS.432.1178H 2013MNRAS.432.1178H, Cat. J/MNRAS/432/1178
Hong et al., Paper IV 2014MNRAS.445..402H 2014MNRAS.445..402H
(End) Patricia Vannier [CDS] 13-Apr-2015