We study the red giant populations of two dwarf elliptical (dE) galaxies, AM 1339-445 and AM 1343-452. The galaxies are members of the Centaurus A group (D~3.8Mpc), and are classified as outlying (R~350kpc) satellites of Cen A. The analysis is based on near-IR photometry for individual red giant stars, derived from images obtained with ISAAC on the VLT, and on optical V and I photometry, derived from WFPC2 images retrieved from the HST science archive. The data enable us to investigate the stellar populations of these galaxies in the vicinity of the red giant branch (RGB) tip. In both systems we find stars above the RGB tip, which we interpret as intermediate-age upper-AGB stars. Their luminosities suggest ages of approximately 6.5+/-1 and 4+/-1Gyr as estimates for the epoch of the last episode of significant star formation in these systems. In both cases the number of upper-AGB stars suggests that ~15% of the total stellar population is in the form of intermediate-age stars.
Viking 1 Gas Exchange, Labeled Release, and Pyrolytic Release Data on Microfilm. These data, supplied by the investigation team, are on 16- mm microfilm and consist of descriptions of the commands that were sent to operate the three instruments, and tabulations of raw and reduced data returned. The command data include Mars time for each experiment sequence, the commands sent, predicted data points for each command file that were used to time tag the data when it came back from the instrument, and a summary of the major events of each command sequence.
Viking 2 Gas Exchange, Labeled Release, and Pyrolytic Release Data on Microfilm. These data, supplied by the investigation team, are on 16- mm microfilm and consist of descriptions of the commands that were sent to operate the three instruments, and tabulations of raw and reduced data returned. The command data include: Mars time for each experiment sequence, the commands sent, predicted data points for each command file that were used to time tag the data when it came back from the instrument, and a summary of the major events of each command sequence.
The VIKING survey with VISTA (ESO programme ID 179.A-2004) is a wide area (eventually 1500 sq.degrees), intermediate-depth (5-sigma detection limit J=21 on Vega system) near-infrared imaging survey, in the five broadband filters Z, Y, J, H, Ks. The planned sky coverage is at high galactic latitudes, and includes two main stripes 70x10{deg}^2^ each: one in the South Galactic cap near Dec~-30{deg}, and one near Dec~0{deg} in the North galactic cap; in addition, there are two smaller outrigger patches called GAMA09 and CFHLS-W1. Science goals include z>6.5 quasars, extreme brown dwarfs, and multiwavelength coverage and identifications for a range of other imaging surveys, notably VST-KIDS and Herschel-ATLAS. This first public data release of data taken between the 12th of November 2009 and the 13th of February 2011 includes 151 tiles with complete coverage in all five VIKING filters (55 in GAMA09/12/14, 91 in SGP and 5 in CFHLS-W1) i.e. 226 square degrees, and includes approximately 14,773,385 total sources (including low-reliability single-band detections) and the imaging and source lists total 314.4GB. The coverage in each of the five sub-areas is not completely contiguous but any inter-tile gaps are relatively small. More details can be found in the accompanying documentation: viking_cat_dr1.pdf
The VIKING survey with VISTA (ESO programme ID 179.A-2004) is a wide area (eventually 1500 sq.degrees), intermediate-depth (5-sigma detection limit J=21 on Vega system) near-infrared imaging survey, in the five broadband filters Z, Y, J, H, Ks. The planned sky coverage is at high galactic latitudes, and includes two main stripes 70x10{deg}^2^ each: one in the South Galactic cap near Dec~-30{deg}, and one near Dec~0{deg} in the North galactic cap; in addition, there are two smaller outrigger patches called GAMA09 and CFHLS-W1. Science goals include z>6.5 quasars, extreme brown dwarfs, and multiwavelength coverage and identifications for a range of other imaging surveys, notably VST-KIDS and Herschel-ATLAS. This second public data release of VIKING data covers all of the highest quality data taken between the start of the survey (12th of November 2009) and the end of Period 92 (30th September 2013). This release supersedes the first release (VIKING and VIKING CAT published 28.06.2013 and 16.12.2013 respectively) as it includes improved CASU processing (V1.3) that gives better tile grouting and zero point corrections This release contains 396 tiles with coverage in all five VIKING filters, 379 of which have a deep co-add in J, and an additional 81 with at least two filters where the second OB has not been executed yet or one filter in an OB was poor quality. These 477 fields cover a total of ~690 square degrees and the resulting catalogues include a total of 46,270,162 sources (including low-reliability single-band detections). The imaging and catalogues (both single-band and band-merged) total 839.3GB. The coverage in each of the five sub-areas is not completely contiguous but any inter-tile gaps are relatively small. More details can be found in the accompanying documentation: viking_cat_dr2.pdf
VIKING - VISTA Kilo-degree Infrared Galaxy survey Data Release 4
Short Name:
VIKING DR4
Date:
04 Dec 2019 13:41:34
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
The VIKING survey is the VISTA counterpart to the VST KIDS survey. The KIDS survey will cover 1500 deg^2 in u,g,r,i divided in two stripes (NGP, centred on equator ; SGP, centred on Dec = -30). The matching VISTA survey will cover (almost) all of these stripes in Z,Y,J,H, Ks with ~ 400s exposures per band.
VIKING - VISTA Kilo-degree Infrared Galaxy survey Data Release 3
Short Name:
VIKING DR3
Date:
04 Dec 2019 13:41:21
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
The VIKING survey is the VISTA counterpart to the VST KIDS survey. The KIDS survey will cover 1500 deg^2 in u,g,r,i divided in two stripes (NGP, centred on equator ; SGP, centred on Dec = -30). The matching VISTA survey will cover (almost) all of these stripes in Z,Y,J,H, Ks with ~ 400s exposures per band.
VIKING - VISTA Kilo-degree Infrared Galaxy survey Data Release 2
Short Name:
VIKING DR2
Date:
04 Dec 2019 13:41:10
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
The VIKING survey is the VISTA counterpart to the VST KIDS survey. The KIDS survey will cover 1500 deg^2 in u,g,r,i divided in two stripes (NGP, centred on equator ; SGP, centred on Dec = -30). The matching VISTA survey will cover (almost) all of these stripes in Z,Y,J,H, Ks with ~ 400s exposures per band.
VIKING - VISTA Kilo-degree Infrared Galaxy survey Data Release 4
Date:
06 May 2015 16:46:18
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
The VIKING survey is the VISTA counterpart to the VST KIDS survey. The KIDS survey will cover 1500 deg^2 in u,g,r,i divided in two stripes (NGP, centred on equator ; SGP, centred on Dec = -30). The matching VISTA survey will cover (almost) all of these stripes in Z,Y,J,H, Ks with ~ 400s exposures per band.
VIKING - VISTA Kilo-degree Infrared Galaxy survey Data Release 3
Date:
17 Dec 2013 11:21:21
Publisher:
WFAU, Institute for Astronomy, University of Edinburgh
Description:
The VIKING survey is the VISTA counterpart to the VST KIDS survey. The KIDS survey will cover 1500 deg^2 in u,g,r,i divided in two stripes (NGP, centred on equator ; SGP, centred on Dec = -30). The matching VISTA survey will cover (almost) all of these stripes in Z,Y,J,H, Ks with ~ 400s exposures per band.
