Introduction

Keeney et al. (2018) present a galaxy redshift survey around 47 sight lines to UV-bright AGN observed by the Cosmic Origins Spectrograph (COS) in order to establish the connection between galaxies and UV-detected absorption systems in the local Universe. The collection of UV-detected absorption systems was released previously as a MAST HLSP ("IGM"; Danforth et al. 2016.) "IGM-GAL" releases the galaxy spectra obtained as a part of this survey for ~9,000 individual galaxies whose redshift are measured. The galaxy spectra are organized by nearest COS sight line, and for most sight lines this survey is >90% complete to ~0.1 L* galaxies within ~1 Mpc of the sight line (see Keeney et al. 2018 for details). Repeat observations imply that this survey has a redshift accuracy of 60 km/s for emission-line galaxies, 100 km/s for absorption-line galaxies, and 80 km/s for composite galaxies that show both emission and absorption. You can refer to the full collection of IGM-GAL data products using the DOI http://dx.doi.org/10.17909/T9XH52.

Description of Data Products

The spectra toward each sight line are organized into subdirectories based on that sight line's "short name" (see the table below). The file names are defined by the following syntax:

where:

• <tel> = telescope name ("aat", "mmt", "wiyn")
• <ins> = instrument name ("aaomega", "hectospec", "hydra")
• <targ> = target field, populated as <sight_line>-<pos_angle>-<gal_dist>-ep<epoch_num>
  where:
  • <sight_line> = sight line short name
  • <pos_angle> = position angle of the galaxy w.r.t. the QSO sight line (degrees, measured east from north)
  • <gal_dist> = distance from the QSO to the galaxy (arcsec)
  • <epoch_num> = epoch number (start from "1")
• <grat> = the grating used

An example of a full file name, including the subdirectory, is:

Data Access

Users may download files for a given sight line using the sortable table below. For a given sight line, click on the "Target table" link to visit a sortable table for all spectra within that sight line. A tar bundle of all galaxy spectra for that sight line is available within each of these pages.

Alternatively, you can download this tar bundle containing every galaxy spectrum for every sight line (tar file is ~500 MB).

Sightline Name	Short Name	RA (deg., J2000)	DEC (deg., J2000)	z_AGN	N_TARGETS	TARGET_TABLE
1ES1028+511	1es1028	157.8270833	50.893333	0.360	53	Target Table
1ES1553+113	1es1553	238.9293500	11.190103	0.360	128	Target Table
1SAXJ1032.3+5051	1sax1032	158.0670833	50.855556	0.173	61	Target Table
3C263	3c263	174.9874458	65.796997	0.646	114	Target Table
3C57	3c57	30.4881667	-11.542536	0.671	35	Target Table
B1612+266	b1612	243.5442500	26.547361	0.395	150	Target Table
CSO_1022	cso1022	208.3588333	36.347083	0.285	455	Target Table
CSO_1080	cso1080	226.3650000	29.788444	0.526	351	Target Table
FBQSJ1010+3003	fbqs1010	152.5029167	30.056111	0.256	143	Target Table
FBQSJ1030+3102	fbqs1030	157.7462083	31.048806	0.178	308	Target Table
FBQSJ1519+2838	fbqs1519	229.9006250	28.641000	0.270	637	Target Table
H1821+643	h1821	275.4887500	64.343333	0.297	121	Target Table
HE0153-4520	he0153	28.8050000	-45.103333	0.451	223	Target Table
HE0226-4110	he0226	37.0633004	-40.954058	0.493	247	Target Table
HE0435-5304	he0435	69.2116667	-52.980278	0.425	297	Target Table
HE0439-5254	he0439	70.0495833	-52.805000	1.053	238	Target Table
HS1102+3441	hs1102	166.4158254	34.426222	0.508	152	Target Table
MRK421	mrk421	166.1137917	38.208833	0.030	56	Target Table
PG0832+251	pg0832	128.8991667	24.994722	0.330	96	Target Table
PG0953+414	pg0953	149.2183750	41.256139	0.234	131	Target Table
PG1001+291	pg1001	151.0107771	28.926439	0.327	119	Target Table
PG1048+342	pg1048	162.9329000	33.990750	0.167	82	Target Table
PG1115+407	pg1115	169.6262500	40.431667	0.154	93	Target Table
PG1116+215	pg1116	169.7858333	21.321667	0.177	120	Target Table
PG1121+422	pg1121	171.1632667	42.029172	0.225	139	Target Table
PG1216+069	pg1216	184.8372167	6.644033	0.331	86	Target Table
PG1222+216	pg1222	186.2268675	21.379539	0.432	67	Target Table
PG1259+593	pg1259	195.3037500	59.035278	0.478	153	Target Table
PG1424+240	pg1424	216.7516325	23.800011	0.160	70	Target Table
PG1626+554	pg1626	246.9838333	55.375419	0.133	167	Target Table
PHL1811	phl1811	328.7562500	-9.373611	0.190	389	Target Table
PKS2005-489	pks2005	302.3557942	-48.831589	0.071	450	Target Table
Q1230+0115	q1230	187.7083508	1.255972	0.117	60	Target Table
RBS711	rbs711	129.2454583	44.433972	0.255	268	Target Table
RXJ0439.6-5311	rxj0439	69.9110146	-53.192100	0.243	234	Target Table
RXJ2154.1-4414	rxj2154	328.7127688	-44.235000	0.344	293	Target Table
S50716+714	s0716	110.4727083	71.343444	0.300	251	Target Table
SBS0956+509	sbs0956	149.8819583	50.746972	0.143	337	Target Table
SBS1108+560	sbs1108	167.8841667	55.790556	0.768	159	Target Table
SBS1122+594	sbs1122	171.4741250	59.172667	0.851	150	Target Table
SDSSJ1028+2119	sdss1028	157.0606667	21.331972	0.374	142	Target Table
SDSSJ1333+4518	sdss1333	203.2534583	45.302500	0.320	213	Target Table
SDSSJ1439+3932	sdss1439	219.8227917	39.545222	0.344	145	Target Table
SDSSJ1540-0205	sdss1540	235.0810833	-2.084833	0.320	156	Target Table
TON1187	ton1187	153.2633333	35.856389	0.079	59	Target Table
TON236	ton236	232.1691746	28.424928	0.450	174	Target Table
TON580	ton580	172.7895833	31.234722	0.289	82	Target Table
VIIZW244	viizw244	131.1887917	76.886028	0.131	232	Target Table