2005AJ....130.2613G

Query : 2005AJ....130.2613G

2005AJ....130.2613G - Astron. J., 130, 2613-2624 (2005/December-0)

The Arecibo Legacy Fast ALFA survey. II. Results of precursor observations.

GIOVANELLI R., HAYNES M.P., KENT B.R., PERILLAT P., CATINELLA B., HOFFMAN G.L., MOMJIAN E., ROSENBERG J.L., SAINTONGE A., SPEKKENS K., STIERWALT S., BROSCH N., MASTERS K.L., SPRINGOB C.M., KARACHENTSEV I.D., KARACHENTSEVA V.E., KOOPMANN R.A., MULLER E., VAN DRIEL W. and VAN ZEE L.

Abstract (from CDS):

In preparation for the full Arecibo Legacy Fast ALFA (ALFALFA) extragalactic H I survey, precursor observations were carried out in 2004 August-September with the seven-beam Arecibo L-band Feed Array (ALFA) receiver system and the Wideband Arecibo Pulsar Processor spectral processors. While these observations were geared mainly at testing and debugging survey strategy, hardware, and software, approximately 48 hr of telescope time yielded science-quality data. The efficiency of system usage (allowing for minor malfunctions and the impact of radio-frequency interference) during that time was 75%. From those observations, an initial list of 730 tentative detections of varying degrees of reliability was extracted. Ninety-eight high signal-to-noise ratio candidates were deemed to be bona fide H I line detections. To test our ability to discriminate cosmic signals from radio-frequency interference and noise, 165 candidates ranging in reliability likelihood were reobserved with the single-beam L-band wide system at Arecibo in 2005 January-February. Of those, 41% were confirmed as real. We present the results of both the ALFA and the single-beam observations for the sample of 166 confirmed H I sources, as well as our assessment of their optical counterparts. Of the 166 sources, 62 coincided with previously known H I sources, while optical redshifts were available for an additional 18 galaxies; thus, 52% of the redshifts reported here were previously unknown. Of the 166 H I detections, 115 are identified with previously cataloged galaxies of either known or unknown redshift, leaving 51 objects identified for the first time. Because of the higher sensitivity of the Arecibo system, fewer than 10% of the 166 H I sources would have been detected by a HIPASS-like survey of the same region. Three of the objects have H I masses less than 107 M☉. The full ALFALFA survey, which commenced in 2005 February, should detect more than 100 times as many objects of similarly low H I mass over the next 5 years.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Distances and Redshifts - Galaxies: Halos - Galaxies: Luminosity Function, Mass Function - Galaxies: Photometry - Galaxies: Spiral - Radio Lines: Galaxies

VizieR on-line data: <Available at CDS (J/AJ/130/2613): table2.dat table3.dat table4.dat notes.dat>

Nomenclature: Table 2: [GHK2005] HI JHHMMSS.s+DDMMSS N=166.

Simbad objects: 166

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Number of rows : 166
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LEDA 1802210 AG? 00 17 13.30 +27 14 54.0           ~ 12 0
2 AGC 101816 G 00 21 15.3 +26 23 07           ~ 5 0
3 UGC 221 AG? 00 23 10.90 +27 25 56.0   14.5       ~ 22 0
4 UGC 278 G 00 28 21.34 +27 22 08.3   15.3       ~ 23 0
5 AGC 101817 HI 00 29 05.1 +27 29 13           ~ 1 0
6 AGC 101819 G 00 30 26.8 +26 38 33           ~ 5 0
7 AGC 101820 G 00 30 51.4 +27 23 24           ~ 5 0
8 AGC 101821 G 00 38 32.3 +26 20 50           ~ 5 0
9 LEDA 1793779 AG? 00 38 56.133 +26 57 50.10           ~ 18 1
10 AGC 101822 AG? 00 40 36.40 +27 03 02.0           ~ 6 0
11 LEDA 1806071 G 00 41 12.9527252160 +27 22 18.814593756           ~ 10 0
12 IC 46 AG? 00 42 57.9923380800 +27 15 13.212618264   14.70       ~ 37 0
13 LEDA 138218 AG? 00 43 57.90 +26 08 49.0   17.2       ~ 12 0
14 UGC 469 G 00 44 03.8273999544 +26 12 24.834398364   15.3       ~ 26 0
15 UGC 470 AG? 00 44 12.6446117592 +26 50 42.159458004   14.8       ~ 23 0
16 Mrk 346 AG? 00 44 56.794 +27 27 01.53   16.5       ~ 16 0
17 AGC 101825 AG? 00 46 27.70 +26 41 31.0           ~ 6 0
18 Z 501-7 G 00 46 47.003 +27 56 30.00   15.4       ~ 12 0
19 UGC 483 LSB 00 46 50.427 +26 28 32.03   15.70       ~ 36 0
20 IC 1584 GiG 00 47 18.5794878768 +27 49 39.494624484   15.0       ~ 40 0
21 AGC 101826 AG? 00 47 37.70 +26 48 19.0           ~ 6 0
22 NGC 252 GiG 00 48 01.5069897792 +27 37 26.093379360   13.4 12.49     ~ 84 0
23 Z 480-8 AG? 00 48 16.653 +26 28 01.75   16.1       ~ 12 0
24 NGC 260 GiG 00 48 34.6692516864 +27 41 32.589049812   14.3       ~ 34 0
25 LEDA 2807048 AG? 00 50 12.22 +27 13 24.9   18.2       ~ 11 0
26 LAMOST J005124.62+271602.1 AG? 00 51 24.70 +27 16 01.0           ~ 7 0
27 AGC 101829 AG? 00 53 07.80 +27 29 09.0           ~ 5 0
28 MCG+04-03-033 G 01 00 34.0236784992 +27 05 52.737828180   15       ~ 11 0
29 Z 480-33 G 01 01 58.527 +26 29 12.04   15.6       ~ 11 0
30 Z 480-35 AG? 01 02 24.07 +26 37 17.5   15.7       ~ 16 0
31 AGC 112506 AG? 01 03 17.80 +26 47 47.0           ~ 6 0
32 LEDA 5057047 G 01 04 56.5 +26 49 36           ~ 6 0
33 AGC 112508 G 01 07 00.8 +26 30 54           ~ 5 0
34 AGC 112509 G 01 07 03.2 +27 15 16           ~ 4 0
35 [GHK2005] HI J011302.6+273832 HI 01 12 57.4 +27 37 59           ~ 1 0
36 LEDA 138333 AG? 01 14 45.617 +27 08 10.11   15.5       ~ 19 0
37 SDSS J011643.04+265444.0 G 01 16 43.044 +26 54 44.04           ~ 5 0
38 SDSS J011742.37+270032.7 G 01 17 42.3789852168 +27 00 32.754353508           ~ 5 0
39 Mrk 355 G 01 22 40.7745624552 +26 52 06.113086500   15.2       ~ 17 0
40 LEDA 5138 AG? 01 24 03.601 +28 05 56.95   16       ~ 10 0
41 UGC 948 LSB 01 24 04.04693 +27 02 47.6329   17       ~ 21 0
42 LEDA 138373 AG? 01 26 08.90 +27 57 56.0   17.4       ~ 12 0
43 LEDA 5057078 G 01 29 43.6 +27 23 40           ~ 6 0
44 2MASS J01315405+2719453 AG? 01 31 54.05376 +27 19 45.3144           ~ 7 0
45 LEDA 1768882 G 01 33 15.601 +26 14 55.61           ~ 11 0
46 AGC 112519 G 01 33 39.2 +26 25 13           ~ 5 0
47 LEDA 138419 AG? 01 37 15.30 +26 26 11.0   18.0       ~ 12 0
48 LEDA 1800162 G 01 37 43.6803936048 +27 10 49.669763124           ~ 10 0
49 LEDA 5057055 AG? 01 41 08.00 +27 19 20.0           ~ 32 0
50 Z 482-1 G 01 41 46.4450411952 +27 30 12.673077588   15.7       ~ 11 0
51 LEDA 138451 AG? 01 42 17.40 +26 22 00.0   16.6       ~ 44 0
52 LEDA 74006 G 01 43 27.218 +27 59 58.43           ~ 8 0
53 LEDA 90562 AG? 01 44 28.80 +27 55 44.0           ~ 22 0
54 LEDA 166062 AG? 01 44 42.3853 +27 17 16.156   17.1       ~ 45 0
55 AGC 112522 G 01 44 54.1265153832 +27 29 09.279083760           ~ 5 0
56 LEDA 166063 G 01 46 42.2 +26 48 05   18.22       ~ 41 0
57 LEDA 2816288 AG? 01 46 54.189 +28 05 57.12           ~ 16 0
58 NGC 670 GiG 01 47 24.8554037808 +27 53 08.957582736   13.53 12.72     ~ 86 0
59 IC 1727 GiP 01 47 29.890 +27 20 00.06   12.54 11.98 11.77   ~ 200 0
60 NGC 672 GiP 01 47 54.4764771528 +27 25 58.020709728 12.04 11.60 11.09 10.81   ~ 287 0
61 LAMOST J014835.25+273253.8 G 01 48 35.2 +27 32 53           ~ 5 0
62 LEDA 1815965 G 01 49 20.1 +27 42 44           ~ 12 0
63 IC 1731 LSB 01 50 12.331 +27 11 46.41   14.2       ~ 66 0
64 NGC 684 GiG 01 50 14.0303429016 +27 38 44.449266768   13.2       ~ 67 0
65 LEDA 1803155 G 01 50 46.6 +27 16 41           ~ 6 0
66 AGC 112524 G 01 51 52.7 +27 45 31           ~ 5 0
67 LEDA 1818925 G 01 54 38.9 +27 49 19           ~ 7 0
68 LEDA 1800333 G 01 54 40.0 +27 11 10           ~ 6 0
69 LEDA 166064 AG? 01 55 20.30 +27 57 14.0   16.3       ~ 56 0
70 LEDA 7188 G 01 55 35.6472871680 +27 43 27.965779536   16.8       ~ 9 0
71 LEDA 1787548 G 01 57 52.2432190104 +26 45 42.727002444           ~ 6 0
72 LAMOST J015859.47+265748.7 G 01 58 59.6 +26 57 49           ~ 6 0
73 LEDA 87208 LSB 01 59 19.30 +27 00 44.0   17.20       ~ 13 0
74 Z 482-36 AG? 01 59 38.139 +27 26 02.04   15.2       ~ 19 0
75 LEDA 1774982 AG? 01 59 51.82 +26 24 18.0           ~ 8 0
76 IC 187 GiG 02 01 30.7745423520 +26 28 51.557949516   13.9       ~ 43 0
77 IC 188 GiG 02 01 46.4806401120 +26 32 48.211485684   14.4       ~ 51 0
78 UGC 1533 G 02 02 48.0444080448 +26 34 52.881183660   15.4       ~ 19 0
79 AGC 122180 G 02 03 02.599 +27 14 25.01           ~ 4 0
80 LEDA 74069 G 02 03 28.8384101736 +27 39 00.147779100   17       ~ 9 0
81 MCG+04-05-046 GiG 02 03 41.055 +26 16 36.89   14.9       ~ 29 0
82 AGC 122182 AG? 02 03 58.30 +26 16 11.0           ~ 5 0
83 UGC 1565 LSB 02 04 32.05704 +27 55 39.2736   15.4       ~ 25 0
84 LEDA 74071 G 02 05 33.3424005696 +27 27 55.145243052   16.5       ~ 9 0
85 AGC 122185 AG? 02 06 00.4 +27 21 31           ~ 6 0
86 UGC 1595 AG? 02 06 27.1607262984 +27 02 00.947744808   15.50       ~ 41 0
87 Z 483-5 G 02 09 02.3300815824 +27 32 14.958475296   15.4       ~ 17 0
88 AGC 122186 G 02 09 18.5 +26 45 28           ~ 5 0
89 AGC 122187 AG? 02 09 56.30 +27 32 34.0           ~ 7 0
90 AGC 122188 G 02 13 07.3 +27 46 49           ~ 5 0
91 AGC 122189 G 02 13 31.2 +26 30 49           ~ 5 0
92 NGC 855 GiG 02 14 03.612 +27 52 37.82 14.19 13.56 12.75 12.40   ~ 229 1
93 LEDA 92856 G 02 15 08.1 +26 23 13   16.85       ~ 8 0
94 AGC 122191 G 02 16 39.7 +26 08 16           ~ 5 0
95 LEDA 1795920 G 02 21 01.129 +27 02 04.17           ~ 11 0
96 LEDA 1817194 G 02 21 03.4 +27 45 26           ~ 8 0
97 LEDA 1824987 G 02 21 39.6 +28 03 04           ~ 8 0
98 LEDA 1776183 G 02 22 26.14 +26 26 10.6           ~ 10 0
99 Z 483-24 G 02 23 31.4445806568 +27 19 23.859736356   15.6       ~ 19 0
100 UGC 1844 G 02 23 39.3777034176 +27 09 32.911938432   15.7       ~ 16 0
101 LEDA 1773576 G 02 23 47.6 +26 22 07           ~ 8 0
102 UGC 1848 GiG 02 23 55.5664185792 +27 29 33.871181496   15.5       ~ 28 0
103 UGC 1850 AG? 02 23 58.50 +27 07 01.0   16.5       ~ 13 0
104 AGC 122197 G 02 24 08.7 +26 39 58           ~ 4 0
105 Z 483-31 G 02 25 00.1838273928 +26 02 56.304825216   15.7       ~ 13 0
106 UGC 1881 GiG 02 25 35.2095488616 +26 44 36.414587328   14.8       ~ 24 0
107 MCG+04-06-032 LSB 02 25 39.5562052224 +27 17 43.523929428   15.6       ~ 14 0
108 AGC 122198 G 02 25 45.2 +26 58 24           ~ 5 0
109 LEDA 2800934 G 02 25 58.735 +27 16 13.99           ~ 8 0
110 UGC 1892 GiG 02 26 12.4205536368 +27 36 12.191106636   15.3       ~ 25 0
111 2MASX J02261518+2606233 GiG 02 26 15.1697083200 +26 06 22.852161720   15.1       ~ 14 0
112 NGC 919 GiG 02 26 16.6495721016 +27 12 43.694446500   15.5       ~ 27 0
113 UGC 1899 GiG 02 26 26.0464921440 +27 39 15.167842452   15.0       ~ 29 0
114 UGC 1902 G 02 26 33.785 +27 49 27.25   16.5       ~ 14 0
115 AGC 122199 G 02 27 38.5 +26 54 45           ~ 5 0
116 NGC 928 GiG 02 27 41.0209579992 +27 13 16.159390716   14.7       ~ 24 0
117 Z 483-58 GiG 02 27 42.3 +26 13 34   14.9       ~ 16 0
118 UGC 1921 GiG 02 27 46.3656273552 +26 35 22.141639536   14.6       ~ 30 0
119 LEDA 100739 G 02 27 54.9083761776 +27 54 21.092082948           ~ 13 0
120 UGC 1939 GiG 02 28 17.5928014128 +26 18 44.809322148   14.9       ~ 31 0
121 LEDA 1787089 G 02 28 49.0 +26 44 50           ~ 8 0
122 SDSS J022859.58+263242.2 G 02 28 59.582 +26 32 42.24           ~ 6 0
123 SDSS J022901.79+260447.5 G 02 29 01.793 +26 04 47.51           ~ 5 0
124 AGC 122203 AG? 02 29 19.90 +27 21 16.0           ~ 6 0
125 LEDA 9537 AG? 02 30 24.2499 +27 57 30.654           ~ 12 0
126 Z 483-73 G 02 30 50.5212846768 +26 11 36.404449368   15.7       ~ 17 0
127 LEDA 9583 AG? 02 31 00.27 +27 57 29.7           ~ 12 0
128 UGC 1990 AG? 02 31 04.1668609368 +27 41 58.134993684   15.7       ~ 27 0
129 LEDA 5057058 AG? 02 31 22.074 +26 11 51.21           ~ 8 0
130 LEDA 1788374 G 02 31 24.5023079160 +26 47 17.517048252           ~ 7 0
131 SDSS J023132.94+264749.6 G 02 31 32.946 +26 47 49.62           ~ 8 0
132 Z 484-1 G 02 31 34.632 +26 09 58.80   15.6       ~ 11 0
133 SDSS J023136.90+263234.6 AG? 02 31 36.901 +26 32 34.65           ~ 11 0
134 LEDA 1800124 AG? 02 31 39.3328923504 +27 10 45.106253220   16.5       ~ 14 0
135 SDSS J023207.55+261137.6 G 02 32 07.554 +26 11 37.63           ~ 5 0
136 LEDA 9670 AG? 02 32 33.659 +27 56 26.62   16.5       ~ 12 0
137 LEDA 1800577 AG? 02 33 28.409 +27 11 41.19           ~ 11 0
138 LEDA 5057062 AG? 02 33 32.202 +27 01 13.87           ~ 10 0
139 SDSS J023514.96+280110.7 G 02 35 14.960 +28 01 10.77           ~ 5 0
140 UGC 2134 GiG 02 38 51.8065325424 +27 50 50.091858024   14.4       ~ 64 0
141 SDSS J024055.56+264002.5 AG? 02 40 55.563 +26 40 02.59           ~ 8 0
142 LEDA 1774354 G 02 41 24.5 +26 23 21           ~ 6 0
143 LEDA 10369 G 02 44 18.4609620672 +26 06 28.894414932   17.88   16.01   ~ 12 0
144 Z 505-52 G 02 46 01.1696572584 +28 01 41.018209032   15.6       ~ 18 0
145 UGC 2236 AG? 02 46 11.188 +27 02 40.93   15.5       ~ 16 0
146 UGC 2272 G 02 48 04.366 +27 06 11.11   14.7       ~ 35 0
147 LEDA 87120 LSB 02 51 23.1 +26 34 58   16.73       ~ 11 0
148 AGC 122224 G 02 51 50.0 +26 03 10           ~ 5 0
149 [GHK2005] HI J030942.0+262649 HI 03 09 42.3 +26 26 13           ~ 1 0
150 [GHK2005] HI J031952.6+262935 HI 03 19 55.5 +26 29 36           ~ 1 0
151 [GHK2005] HI J032120.9+262104 HI 03 21 21.6 +26 20 34           ~ 1 0
152 [GHK2005] HI J033140.7+260603 HI 03 31 41.6 +26 05 15           ~ 1 0
153 2MASX J03340150+2610319 G 03 34 01.4751133464 +26 10 32.247944760           ~ 3 0
154 [GHK2005] HI J033716.0+262357 HI 03 37 22.5 +26 25 05           ~ 1 0
155 Z 487-12 AG? 04 02 26.3027066088 +26 49 27.780205296   15.6       ~ 8 0
156 Z 487-15 GiG 04 03 29.8606995504 +26 21 46.096568712   14.9       ~ 22 0
157 AGC 140472 AG? 04 15 59.70 +26 59 55.0           ~ 2 0
158 [GHK2005] HI J041844.5+265513 HI 04 18 43.8 +26 55 26           ~ 1 0
159 UGC 3009 LSB 04 19 05.951 +26 10 47.94   16.0       ~ 31 0
160 AGC 140474 AG? 04 27 43.50 +26 04 37.0           ~ 2 0
161 LEDA 18270 AG? 06 01 26.649 +26 03 27.81           ~ 6 0
162 LEDA 136075 AG? 06 06 29.2283371488 +26 23 36.599663256           ~ 12 0
163 [GHK2005] HI J062218.4+262631 HI 06 22 18.4 +26 26 31           ~ 1 0
164 AGC 160545 AG? 06 33 39.00 +26 29 05.0           ~ 3 1
165 2MASX J06383812+2630221 G 06 38 38.1409975608 +26 30 21.696240348   15.4       ~ 13 0
166 MCG+04-16-006 PaG 06 50 03.7836649872 +26 22 54.835262904   15.2       ~ 12 0

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