WIYN Status - Semester 2014B Proposer Information
Commissioning of the partially populated One Degree Imager (pODI) in static mode is complete. Coherent guide mode is functional, but not
yet fully supported by the data reduction system and therefore not
recommended for end users yet. Binning has been implemented and is
available on a shared risk basis. Observers should be prepared to confirm the measurements they make (surprising results, especially). Information about proposing for pODI as well as its capabilities and performance can be found within the ODI Observing Information web pages.
The pODI imager may be upgraded to a larger format starting possibly as early as the 2014B semester. If that happens, depending on the specific to-be-determined start date for the project, pODI may be unavailable for all of 2014B or it may be available for some time at the beginning of the semester. If the start date of the upgrade is pushed beyond 2014B then we anticipate that pODI will be available for most of, if not all, of 2014B. Please check back at this page for updates, as needed.
Other instrument availability in 2014B
There are several key things to note about the availability of the other 3.5-m instruments in 2014B:
- WIYN is pleased to announce the availability of two new unique integral field units (IFUs) for shared risk observing in semester 2014B, HexPak and GradPak. These IFUs are distinguished by having different sized fibers in the same head to optimize the balance between surface brightness and signal-to-noise for various classes of extended objects. They were developed by Matt Bershady's group in Washburn Astronomical Laboratories at the University of Wisconsin-Madison. As they are still PI-level, rather than facility, instruments, it is necessary to work with the PI before submitting a proposal to use the new IFUs. Please read the introduction letters from the WIYN director and the instrument PI. More information and instructions on how to proceed can be found on the Hexpak and Gradpak web pages. SparsePak will continue to be offered as a facility instrument.
- All other WIYN instruments now share the second Nasmyth port, known as the Hydra port. Thus, (the IFUs)+WHIRC, WHIRC+Visitor Instruments, and Hydra will be block scheduled. The switch between Hydra and the Instrument Adapter System (IAS) that supports the WIYN High-Resolution Infrared Camera (WHIRC), SparsePak, Hexpak, Gradpak, and visitor instruments takes two to five days to complete, we are currently discussing the optimal cadence for the switch. Therefore, there will be a minimum of two months between changes of Hydra to other instruments on the Hydra port. Check back here for further updates.
- Since WHIRC was commissioned in 2008, we had noticed a steady but significant (40%) decrease in the standard signal level, which we attributed to a deterioration of the original enhanced silver coatings on the WTTM mirrors. During the WHIRC hiatus last summer, the WTTM mirrors were removed, and spare WTTM mirrors were sent out to a vendor for coating with a proprietary gold layer. Since WHIRC operates only in the infrared, the loss of reflectivity in the blue is not important. The old WTTM mirrors have been stripped and will be recoated to serve as spares. With the newly coated WTTM mirrors, the standard signal levels have increased to slightly above their original 2008 levels. The active tip/tilt correction of WTTM also appears to be working properly and should be available for the 2014B observing semester. See the WHIRC Hot News for the latest results.
- MiniMo is not expected to be available in 2014B.
Remote observing at WIYN is now available to all qualified observers (see the remote observing policies). Those wishing to observe remotely with ODI must do so from a pre-approved (and tested) workstation. More information can be found on the WIYN Remote Observing page.
WIYN 0.9m Status
In October of 2013, the WIYN 0.9m observatory started
commissioning and initial operations with the Half Degree
Imager (HDI). The 0.9m consortium is currently offering
nights with HDI to the community as shared risk, through
proposals submitted to NOAO. S2KB is the backup instrument
if HDI becomes unavailable.
Key characteristics of S2KB and HDI compared
||21 x 21 um
||15 x 15 um
||0.6 x 0.6 arcsec
|| 0.43 x 0.43 arcsec
|Number of pixels
||2048 x 2048
||4096 x 4112
|Area on sky
||20.5 x 20.5 arcmin
||29.2 x 29.2 arcmin
|Readnoise (various modes)
||9, 14, 20
||4, 5, 7, 10
|Readout time (1 x 1 bin)
||111 sec/N amplifiers
(N = 1, 2, 4)
|Well depth (e-)
|Quantum efficiency (%)
Any questions can be directed to Eric Hooper (ehooper at wiyn.org).
Last modified: 08-Apr-2014 10:45:05 MST