FISICA: the Florida imager slicer for infrared cosmology and astrophysics

Eikenberry, S. S.; Raines, S. N.; Gruel, N.; Elston, R.; Guzmán, R.; Julian, Jeff; Boreman, Glenn D.; Glenn, Paul; Hull-Allen, G.; Hoffman, Jeffrey A.; Rodgers, Michael O.; Thompson, Kevin G.; Flint, Scott; Comstock, Lovell E.; Myrick, Bruce

doi:10.1117/12.672184

Cited by 6 publications

(7 citation statements)

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“…This significantly reduces the cost and complexity of the overall instrument. The heart of the IFS is an image slicer-based IFU called FISICA, 16 which consists of optical elements that have been diamond-turned from 6061 aluminum. The IFU converts a rectangular field into a pseudoslit, which is then dispersed by the spectrograph optics located downstream.…”

Section: Instrument Descriptionmentioning

confidence: 99%

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The wide integral field infrared spectrograph: commissioning results and on-sky performance

Sivanandam

Moon

Meyer

et al. 2018

Ground-Based and Airborne Instrumentation for Astronomy VII

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We have recently commissioned a novel infrared (0.9 − 1.7 µm) integral field spectrograph (IFS) called the Wide Integral Field Infrared Spectrograph (WIFIS). WIFIS is a unique instrument that offers a very large field-of-view (50 x 20 ) on the 2.3-meter Bok telescope at Kitt Peak, USA for seeing-limited observations at moderate spectral resolving power. The measured spatial sampling scale is ∼ 1 × 1 and its spectral resolving power is R ∼ 2, 500 and 3, 000 in the zJ (0.9 − 1.35 µm) and H short (1.5 − 1.7 µm) modes, respectively. WIFIS's corresponding etendue is larger than existing near-infrared (NIR) IFSes, which are mostly designed to work with adaptive optics systems and therefore have very narrow fields. For this reason, this instrument is specifically suited for studying very extended objects in the near-infrared such as supernovae remnants, galactic star forming regions, and nearby galaxies, which are not easily accessible by other NIR IFSes. This enables scientific programs that were not originally possible, such as detailed surveys of a large number of nearby galaxies or a full accounting of nucleosynthetic yields of Milky Way supernova remnants. WIFIS is also designed to be easily adaptable to be used with larger telescopes. In this paper, we report on the overall performance characteristics of the instrument, which were measured during our commissioning runs in the second half of 2017. We present measurements of spectral resolving power, image quality, instrumental background, and overall efficiency and sensitivity of WIFIS and compare them with our design expectations. Finally, we present a few example observations that demonstrate WIFIS's full capability to carry out infrared imaging spectroscopy of extended objects, which is enabled by our custom data reduction pipeline.Young supernova remnants (SNRs) are rich in NIR lines, which serve as diagnostics of supernova nucleosynthetic processes and explosions. This is especially true for the zJ-band that has transitions of iron, sulphur, phosphorus, oxygen, carbon, and helium, which have crucial information for the supernova nucleosynthesis and explosion mechanisms. WIFIS observations will make it possible to conduct precise abundance comparisons of the supernova nucleosynthetic elements. For instance, we have recently discovered an increased abundance of phosphorus in Casseopia A, 11 confirming the in-situ creation of phosphorus -one of the six indispensable elements of human * The principal investigator of WIFIS is Dae-Sik Moon.

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Section: Instrument Descriptionmentioning

confidence: 99%

“…The field is then reimaged onto an image slicer-based integral field unit (IFU) called FISICA. 16 The reimaging optics can be replaced to accommodate different telescopes. This IFU forms a pseudoslit, which is then dispersed by the spectrograph optics downstream of it.…”

Section: Instrument Descriptionmentioning

confidence: 99%

The wide integral field infrared spectrograph: commissioning results and on-sky performance

Sivanandam

Moon

Meyer

et al. 2018

Ground-Based and Airborne Instrumentation for Astronomy VII

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“…Each one of these smaller fields would be the entrance to a standard image-slicer , 6,7,8,9 , whose output would be one long-slit. The entrance field of view is 9 x 9 arcsec 2 , which is the field covered by eight slits with 200arcsec length and 0.05arcsec width.…”

Section: Image Slicermentioning

confidence: 99%

“…Another option for the integral field unit is using image-slicers 5,6,7,8,9 . The main concept is basically a slicer element that cuts the two-dimensional entrance field of view and uses mirror arrays to reorganize it into one or more long-slits.…”

Section: Image Slicermentioning

confidence: 99%

Feasibility study of high-resolution integral-field spectrographs for EST with multislit and multi-wavelength capabilities

2010

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This communication shows the feasibility study of a new instrument designed for the 4 meter European Solar Telescope (EST) for high resolution spectro-polarimetric observations. This paper is specifically focused on the spectrographs that allow the simultaneous observation of 5 visible and 4 near-infrared wavelengths (complying with the science requirements), with 8 entrance slits of 200arcsec each fed by an integral field unit covering an area on the solar surface of 9 x 9 arcsec 2 .

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“…The IFU, called Florida Image Slicer for Infrared Cosmology and Astrophysics (FISICA), is an image slicer-type IFU that was constructed by the University of Florida. [2][3][4] For seeing-limited observations, the image slicer-type IFU is best suited for wide-field operation compared to a lenslet array-based IFU because of its coarse spatial sampling and higher throughput. For AO, however, the image slicer-type IFU is not well-suited because it introduces more wavefront errors compared to lenslet array-type IFU made with low index of refraction material.…”

Section: Optical Designmentioning

confidence: 99%

The development of WIFIS: a wide integral field infrared spectrograph

Sivanandam

Chou

et al. 2012

SPIE Proceedings

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We present the current results from the development of a wide integral field infrared spectrograph (WIFIS). WIFIS offers an unprecedented combination of etendue and spectral resolving power for seeing-limited, integral field observations in the 0.9 − 1.8 µm range and is most sensitive in the 0.9 − 1.35 µm range. Its optical design consists of front-end re-imaging optics, an all-reflective image slicer-type, integral field unit (IFU) called FISICA, and a long-slit grating spectrograph back-end that is coupled with a HAWAII 2RG focal plane array. The full wavelength range is achieved by selecting between two different gratings. By virtue of its re-imaging optics, the spectrograph is quite versatile and can be used at multiple telescopes. The size of its field-of-view is unrivalled by other similar spectrographs, offering a 4.5 × 12 integral field at a 10-meter class telescope (or 20 × 50 at a 2.3-meter telescope). The use of WIFIS will be crucial in astronomical problems which require wide-field, two-dimensional spectroscopy such as the study of merging galaxies at moderate redshift and nearby star/planet-forming regions and supernova remnants. We discuss the final optical design of WIFIS, and its predicted on-sky performance on two reference telescope platforms: the 2.3-m Steward Bok telescope and the 10.4-m Gran Telescopio Canarias. We also present the results from our laboratory characterization of FISICA. IFU properties such as magnification, field-mapping, and slit width along the entire slit length were measured by our tests. The construction and testing of WIFIS is expected to be completed by early 2013. We plan to commission the instrument at the 2.3-m Steward Bok telescope at Kitt Peak, USA in Spring 2013.

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FISICA: the Florida imager slicer for infrared cosmology and astrophysics

Cited by 6 publications

References 0 publications

The wide integral field infrared spectrograph: commissioning results and on-sky performance

The wide integral field infrared spectrograph: commissioning results and on-sky performance

Feasibility study of high-resolution integral-field spectrographs for EST with multislit and multi-wavelength capabilities

The development of WIFIS: a wide integral field infrared spectrograph

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