Parkes observations for project P1067 semester 2020OCTS_03

The Parkes Ultra-wide-bandwidth receiver (UWL) has enabled, for the first time with the Parkes telescope, a commensal high time and high frequency resolution survey. As part of the 2020APRS semester, we have been able to demonstrate the viability of this technique through observations of the region of the Galaxy known as "Baade's Window", in which we are guaranteed detections of pulsars and spectral lines. Our science drivers are diverse and range from understanding scattering, to detecting new pulsars, to searching for galaxies in the zone of avoidance, probing the globular cluster at the centre of the window and studying OH circumstellar masers and CO-dark molecular gas. For the 2020OCTS semester, we propose to repeat the initial survey after an interval of 6 months. This is intended to allow for the confirmation of any newly discovered pulsars and spectral detections, and to provide a means of discriminating new spectral features from background interference by measuring their Doppler shift over the Earth's orbit. The observing strategy and processing software developed for this survey will be applicable to all future Parkes surveys with the UWL or the future cyrogenically-cooled phased array feed (CryoPAF).

帕克斯超宽带接收机（Ultra-wide-bandwidth receiver, UWL）首次借助帕克斯望远镜，实现了共生式高时间分辨率与高频率分辨率巡天。作为2020APRS观测时段的一部分，我们通过对被称为“巴德窗（Baade's Window）”的银河区域开展观测，验证了该技术的可行性——该区域可确保我们探测到脉冲星与谱线。我们的科学目标涵盖多元方向：从研究星际散射效应、搜寻新脉冲星，到在银河回避区（zone of avoidance）中搜寻星系、探测该窗口中心的球状星团（globular cluster），以及研究羟基（OH）星周脉泽（OH circumstellar masers）与一氧化碳暗分子气体（CO-dark molecular gas）。针对2020OCTS观测时段，我们计划间隔6个月后重复开展首轮巡天。此举旨在确认所有新发现的脉冲星与谱线探测结果，并通过测量这些信号在地球轨道周期内的多普勒频移，区分新谱线特征与背景干扰。本次巡天开发的观测策略与处理软件，可适配未来所有基于UWL或新一代低温相控阵馈源（CryoPAF，cyrogenically-cooled phased array feed）的帕克斯望远镜巡天项目。