- Determination of the Hubble parameter to within 1%, from z < 0.3 measurements of the BAO signature in the galaxy clustering power spectrum.
- Bulk flow measurements, from Fundamental Plane distance and peculiar velocity determinations for ~60000 early-type galaxies.
- Detailed studies of the life cycle of baryons within galaxies as a function of mass and environment, incorporating panchromatic data from Wallaby, WISE, VHS, etc.
The Taipan team is keen to support a Priority and Ancillary Science program, recognising the value of enabling a broader range of science and providing opportunities for a wider community to participate in the Taipan program. We expect main survey operations to begin in mid-2017, and most approved ancillary science programs to begin in early 2018.
In order to account for the cost to the main survey, we ask all ancillary science programs that request additional (non-main-survey) targets to provide in-kind or cash contributions as appropriate. All publications arising from ancillary science programs will fall under the Taipan survey publication policy, to give the broader Taipan team the opportunity to provide and be recognised for scientific contributions.
- We do not expect to be in a position to observe "spare fibre" targets, that is we do not expect to run short on main survey targets, until relatively late in the survey. Further, our simulations indicate that there will be a significantly smaller proportion of "spare fibres" than earlier surveys such as 6dFGS or GAMA. While we see the value in allocating some fraction of main survey time for these kinds of complementary projects, there is nonetheless significantly less scope than earlier programs to allocate fibres to extra targets without compromising our main survey goals.
- With the large field of view (6 deg. in diameter), and the relatively low fibre density (150 fibres over ~28 sq deg.), any ancillary science using additional targets will need to operate with a relatively low sky density (on the order of 1-10 / sq. deg.) to be able to be folded into Taipan observing without significant impact on the main survey.
- The Taipan main survey will target a magnitude-limited sample down to what can be reasonably observed with the 1.2m UKST, there is a narrow range of ancillary science additional targets where (1) there can be a reasonable prospect of obtaining useful data, and (2) that target is not already within the main survey. Potential targets would need to be brighter than our limit, but not galaxies (such as quasars, for example), or fainter than our limit, but with strong emission lines (perhaps radio or UV detections).
Please send your expression of interest, limited to 1 page, to Andrew Hopkins (email@example.com) by 31 March 2017. The EoI should include the following:
- Whether you are requesting Priority Science (i.e., want to have the Taipan survey team prioritise an existing survey field or targets, please provide details), or Ancillary Science (i.e., you have an additional list of specific targets, or target types).
- If the latter, what kind and level of contribution you will agree to commit to, noting that the value of the contributions will be a factor in defining which ancillary programs are pursued:
- direct effort on Taipan team activities as specified by the Taipan galaxy survey executive;
- a cash contribution described further below, but broadly at a level of $1000 per thousand spectra to offset UKST operational costs borne by the Taipan survey team;
- a combination of the above.
- A short scientific justification (a couple of paragraphs) that demonstrates why the Taipan facility is the most suitable for your science, and shows the significance and impact of your expected results.
For cash contributions, the cost is basically $1 per spectrum but with the following requirements:
- A minimum cash contribution of $5000 is required before it becomes cost effective for the Taipan team to adopt the necessary overheads. For samples smaller than 5000 targets, a minimum cost of $5000 is still required, although for very small samples the Taipan executive may be approached to consider waiving the cost.
- For larger samples, a cost of $1000 for each additional thousand spectra or fraction thereof, so that costs increase in increments of $1000.
- A "spectrum" here is defined as the output of a standard Taipan visit (presently anticipated to be 3 exposures of 5 minutes = 15 minute exposure in total). If ancillary science requests want longer exposures (multiple visits on a single target) each 15 minute dataset counts as a "spectrum" (so, e.g., a 60 minute exposure on a single target would be charged as 4 "spectra", even if subsequently combined into a single ancillary science spectrum). Shorter exposures (<15 min), if needed and we can accommodate them, would still count as a single "spectrum".
- The charge is for spectra requested and targeted, not for spectra delivered, although the Taipan team will make all reasonable efforts to deliver on what is requested. This is because the impact on the main survey is the same whether or not we successfully acquire an ancillary spectrum, and multiple attempts would increase the impact on the main survey. (So, weather losses, for example, will impact ancillary science to the same degree as main survey targets.) The Taipan team can of course be requested to try again for further payment.