ERIS-SPIFFIER reduced data obtained by standard ESO pipeline processing

This is the release of the reduced, reconstructed 3D cubes from the ERIS/SPIFFIER instrument.

The Enhanced Resolution Imager and Spectrograph (ERIS) is a general-use infrared integral field spectrograph (IFS) and imager (NIX) that utilises the adaptive optics on the VLT’s Unit Telescope 4 (Yepun). The spectrograph is a medium-resolution IFS that operates in thenear-infrared range of 1 – 2.5 μm (J, H, and K bands). SPIFFIER has twelve grating configurations. Three low-resolution (R~5,000) grating configurations span each of the J, H, and K bands. The nine high-resolution (R~10,000) configurations span each of these bands in sets of three, with each grating spanning approximately one half of the band (one covering the first half, one covering the second half, and one centred on the middle of the band). Three plate scales correspond to an on-sky field-of-view of 0.8" x 0.8", 3.2" x 3.2", and 8" x 8", with corresponding spaxel (spatial pixels) of sizes 12.5 x 25, 50 x 100, and 125 x 250 mas/spaxel, respectively. SPIFFIER can be operated without adaptive optics (AO), with natural guide star AO, and/or with a single laser guide star.

The focus of this release is dedicated to the fully reduced data product cubes from the ERIS/SPIFFIER IFS. These data consist of science exposures that have been dark-corrected, flat-fielded, linearity and gain corrected, wavelength calibrated, sky background corrected and, if possible, photometrically calibrated. The reconstructed 3D combined cube constitutes the primary data product and is provided as a multi-extension file (MEF) consisting of the data, error and quality cubes. The fully processed, individual 3D cubes that make up each combined cube are also included, along with the mean collapsed combined cube (white light), the associated sky exposure cube, and the exposure map.

This release is an open stream release, it is complete from the begin of operations, 2023-04-01 (period 111), until present.

本数据集发布了经过精简与重构的ERIS/SPIFFIER仪器3D立方体数据。
增强分辨率成像与摄谱仪（Enhanced Resolution Imager and Spectrograph，ERIS）是一款通用型红外积分场摄谱仪（Integral Field Spectrograph，IFS）兼成像仪（NIX），依托甚大望远镜（Very Large Telescope，VLT）4号单元望远镜（Yepun，耶普恩）的自适应光学系统运行。该摄谱仪为中分辨率积分场摄谱仪，工作波段覆盖近红外1–2.5 μm（包含J、H、K三个波段）。SPIFFIER共设有12种光栅配置：3种低分辨率（R≈5000）光栅配置分别覆盖J、H、K各波段；9种高分辨率（R≈10000）光栅配置以每组3个的形式覆盖上述波段，每个光栅约覆盖对应波段的一半区域——分别覆盖波段前半段、后半段，以及以波段中心为中心的区域。三种视场比例尺分别对应0.8″×0.8″、3.2″×3.2″与8″×8″的天区视场，对应的空间像素（spaxel）尺寸依次为12.5×25、50×100与125×250毫角秒每像素。SPIFFIER可在三种模式下运行：无自适应光学（Adaptive Optics，AO）模式、自然导星自适应光学模式，以及单激光导星自适应光学模式。
本次发布的核心为ERIS/SPIFFIER积分场摄谱仪产出的完全精简处理后的立方体数据产品。此类数据包含经过暗场校正、平场校正、线性度与增益校正、波长定标、天空背景校正，且在可行条件下完成光度定标的科学曝光数据。重构得到的3D组合立方体为核心数据产品，以多扩展文件（Multi-Extension File，MEF）格式提供，包含数据立方体、误差立方体与质量立方体。本次发布同时附带构成每个组合立方体的独立完全处理3D立方体、平均折叠组合立方体（白光图像）、配套的天空曝光立方体，以及曝光映射图。
本次发布属于开放流式发布，覆盖自2023年4月1日（第111运行周期）起至今的全部运行数据。