An Integral Field Unit for the Binospec Spectrograph
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arXiv
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| Format: | Preprint |
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2025
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| author | Fabricant, Daniel Ben-Ami, Sagi Chilingarian, Igor Fata, Robert Moran, Sean Paegert, Martin Smith, Matthew Zajac, Joseph |
| author_facet | Fabricant, Daniel Ben-Ami, Sagi Chilingarian, Igor Fata, Robert Moran, Sean Paegert, Martin Smith, Matthew Zajac, Joseph |
| contents | Binospec is a wide-field optical (360 to 1000 nm) spectrograph commissioned at the MMT 6.5m telescope in 2017. In direct imaging mode Binospec addresses twin 8$^\prime$ (wide) by 15$^\prime$ (slit length) fields of view. We describe an optical fiber based integral field unit (IFU) that remaps a 12$^{\prime\prime}$ x 16$^{\prime\prime}$ contiguous region onto two pseudo slits, one in each Binospec channel. The IFU, commissioned in 2023, fits into the space of a standard slit mask frame and can be deployed as desired in a mixed program of slit masks, long slits, and IFU observations. The IFU fibers are illuminated by a hexagonal lenslet array with a 0.6$^{\prime\prime}$ pitch. A separate bundle of sky fibers consists of close-packed bare fibers arranged within an 11.8$^{\prime\prime}$ circular aperture. The 640 IFU fibers and 80 sky fibers have a core diameter of 150$μ$m, corresponding to 0.90$^{\prime\prime}$. Three gratings are available, 270lpm with R$\sim$2000, 600lpm with R$\sim$5300, and 1000 lpm with R$\sim$6000. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_01528 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An Integral Field Unit for the Binospec Spectrograph Fabricant, Daniel Ben-Ami, Sagi Chilingarian, Igor Fata, Robert Moran, Sean Paegert, Martin Smith, Matthew Zajac, Joseph Instrumentation and Methods for Astrophysics Binospec is a wide-field optical (360 to 1000 nm) spectrograph commissioned at the MMT 6.5m telescope in 2017. In direct imaging mode Binospec addresses twin 8$^\prime$ (wide) by 15$^\prime$ (slit length) fields of view. We describe an optical fiber based integral field unit (IFU) that remaps a 12$^{\prime\prime}$ x 16$^{\prime\prime}$ contiguous region onto two pseudo slits, one in each Binospec channel. The IFU, commissioned in 2023, fits into the space of a standard slit mask frame and can be deployed as desired in a mixed program of slit masks, long slits, and IFU observations. The IFU fibers are illuminated by a hexagonal lenslet array with a 0.6$^{\prime\prime}$ pitch. A separate bundle of sky fibers consists of close-packed bare fibers arranged within an 11.8$^{\prime\prime}$ circular aperture. The 640 IFU fibers and 80 sky fibers have a core diameter of 150$μ$m, corresponding to 0.90$^{\prime\prime}$. Three gratings are available, 270lpm with R$\sim$2000, 600lpm with R$\sim$5300, and 1000 lpm with R$\sim$6000. |
| title | An Integral Field Unit for the Binospec Spectrograph |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2501.01528 |