Insight-HXMT Announcement of Opportunity for Cycle 5 Proposals

Dear colleagues,
I am pleased to invite you to respond to the 5th “Announcement of Opportunity” by submitting proposals for observations to be performed with the Insight-HXMT satellite. The Insight-HXMT Cycle 5 guest observation program is open completely to the whole international scientific community.

Insight-HXMT is China's first X-ray astronomy satellite. It was launched on 15th June 2017 and is currently in service smoothly. There are three main payloads onboard Insight-HXMT, the high energy X-ray telescope (20–250 keV, 5100 cm2), the medium energy X-ray telescope (8–35 keV, 952 cm2), and the low energy X-ray telescope (1–12 keV, 384 cm2). The main scientific objectives of Insight-HXMT are:
(1) to scan the Galactic Plane to find new transient sources and to monitor the known variable sources;
(2) to observe X-ray binaries to study the dynamics and emission mechanism in strong gravitational or magnetic fields;
(3) to monitor and study Gamma-Ray Bursts (GRBs) and Gravitational Wave Electromagnetic counterparts (GWEM).

The Insight-HXMT Data Analysis Software (HXMTDAS, V2.05) and the CALDB have been frequently updated and the latest version (V2.05) has been released in February of 2022. In this software version, some bugs have been fixed and some other useful modules have been provided. The new update notes are available on the portal (http://hxmtweb.ihep.ac.cn/documents/646.jhtml). To facilitate the analysis of the GRB data, the Insight-HXMT GRB Data Analysis software (version: beta 1.4) has been released.
Users can download Level-1 data products from the Insight-HXMT official website (http://archive.hxmt.cn/proposal ). Members of core science team can apply for the core observation data within the proprietary period; PI of the guest observation can download the corresponding data; the data beyond the proprietary period or ad hoc ToO observation data are open to the public. Up to Dec 31, 2021, 2439 data product and 255 GRB data have been publicly released.

The key milestones for this announcements(UTC-8):
Proposals Submissions Open time: Apr. 15, 2022
Proposals Due: May. 15, 2022
Announcement of accepted proposals: Jul. 30, 2022
Start time of the AO-04 Observations: Sep. 1, 2022
End time of the AO-04 Observations: Aug. 31, 2023

(1)Approximately 47 Ms of exposure time (also called effective observation time; for 50% observation efficiency, the actual observation time is two times longer) will be available in the observing period, in which the ratio for core proposals and guest proposals is 2:3, as shown in Table 11. Up to 12 Ms of exposure time will be assigned for non-ToO observations (quiescent or persistent sources) and up to 35 Ms of exposure time would be assigned for ToO observations (transient sources, for whom the probability of the outbursts is approximately 10%). Accepted proposals will be awarded with priority A (30%), B (50%), and C (20%) targets, respectively, and priority C targets will be observed depending on the available time allocation. In addition, up to 2 Ms of exposure time will be reserved for the ad hoc observations, such as not pre-approved ToO or calibration observations.

(2)The core proposals can ONLY be submitted by the core science group leaders, which will be reviewed and selected by the core science group. Data rights will be shared within the core science group members during the data proprietary period.

(3)The core science group members can submit the guest proposals, and follow the data policy of guest proposals.

(4)Proposals for the Galactic Plane scan, background observations and calibration observations are ONLY open to the core science groups now.

(5)Joint proposals are open to coordinated observations with other ground- or space-based observatories. If accepted, the proposers should secure the requested observations of other observatories before requesting trigger to Insight-HXMT and coordinate all observations.

(6)The data proprietary periods for this AO are one year for approved non-ToO observations and three months for approved ToO observations, if not specified and approved otherwise.

(7)“PhD Research Program”: Up to 20% of the data from the regular observations can be made for exclusive-use for PhD research. The PhD supervisors from the core science groups can apply for data protection in the proposals. If approved, the data will be protected during the proprietary periods.

(8)Data protection can also be applied to Ad Hoc ToO observations. If approved, the data proprietary period will be three months. Otherwise, Ad Hoc ToO data will be released immediately.

(9)Approved but not yet fully executed Priority A non-ToO observations from AO-3 will be moved to AO-4 automatically; the other approved but not yet fully executed AO-3 observations need to be re-proposed with scientific justifications.

Useful links:
Submit via the website (registration needed): http://proposal.ihep.ac.cn/proposal.jspx
Submit via the website (registration reuired): http://proposal.ihep.ac.cn/proposal.jspx
Guide for proposal submission: http://enghxmt.ihep.ac.cn/doc/170.jhtml
Observation time estimator: http://proposal.ihep.ac.cn/calc/calc.jsp
Target Visibility Predictor: http://proposal.ihep.ac.cn/TargetVisibilityPredictor/
Bright source warning tool: http://proposal.ihep.ac.cn/soft/soft2.jspx
Spectrum simulation tool: http://proposal.ihep.ac.cn/soft/user_spec_2020.zip
Instructions for proposal submission: http://enghxmt.ihep.ac.cn/doc/170.jhtml
Proposal forms download: http://enghxmt.ihep.ac.cn/doc/282.jhtml
List of Sources observed: http://hxmten.ihep.ac.cn/ObsSrcList.jhtml 
Data Policy: http://enghxmt.ihep.ac.cn/policy/174.jhtml
Insight-HXMT core team composition and paper authorship rules: http://hxmten.ihep.ac.cn/policy/173.jhtml 
Insight-HXMT publications: http://hxmten.ihep.ac.cn/papers.jhtml

I look forward to receiving your Insight-HXMT proposals.

Yours sincerely,
Prof. Shuang-Nan Zhang, PI of Insight-HXMT
Insight-HXMT Science Center, Institute of High Energy Physics, the Chinese Academy of Sciences 
Apr. 10, 2022

Questions, please mail to:
Zheng Shijie:zhengsj@ihep.ac.cn
Ou ge:oug@ihep.ac.cn

FAQ & Feedback:


“慧眼”硬X射线调制望远镜(Insight-HXMT)卫星(以下简称慧眼卫星)是我国第一颗空间X射线天文卫星,它既可以实现宽波段、大视场的X射线巡天,又能够研究黑洞、中子星等高能天体的短时标光变和宽波段能谱,同时也是大视场(~60%全天)和大面积(0.2-3 MeV,~1000 cm2)的伽马射线暴全天监视器。它包含三个主要的在轨探测器:高能X射线望远镜 (20-250 keV, 5100 cm2),中能X射线望远镜 (8-35 keV, 952 cm2)以及低能X射线望远镜 (1-12 keV, 384 cm2)。
“慧眼”卫星自2017年6月15日于酒泉卫星发射中心发射升空,目前已在轨运行57个月,运行良好,正处在第一次延寿阶段。在此期间,慧眼卫星获得了银道面扫描巡天、黑洞、中子星、太阳耀发等大量观测数据,伽马射线暴探测率约80个/年。到目前为止,“慧眼”卫星已经取得了多项有显示度的成果:参与监测了首个双中子星并合引力波事件(GW170817)的电磁对应体;测量到了超过80 keV的中子星磁场回旋吸收线;发现了高于200 keV的黑洞双星系统的准周期振荡;发现了黑洞双星向外高速运动的等离子体流,并且首次在黑洞双星中观测到冕的速度演化;发现了中子星的单个Ⅰ型核爆对吸积盘冕的冷却现象;首次发现并证认了FRB的X射线对应体;首次观测到黑洞“q”图的产生是由于硬X射线辐射演化早于软X射线辐射;探测到第24太阳活动周最大耀斑并揭示非热电子演化;对银盘的扫描监测获得了大量X射线天体的宽波段爆发活动的监测并且发现了多个新变源的候选体;完成了国内最高精度的脉冲星导航试验;还多次参加国际空间和地面联测。这些观测研究表明,“慧眼”卫星不仅能实现其预定的科学目标,而且有望取得超出预期的重要科学成果。
“慧眼”卫星的用户数据分析软件和标定数据库(CALDB)不断完善。利用空天区,Cas A、Crab星云及脉冲星等观测数据不断监测载荷性能的变化,持续更新标定数据库。用户数据分析软件会检索适合该次观测的标定文件并产生正确的响应文件。同时,本底模型考虑了更多的相关因素,有效提高了本底估计的精度。2022年2月,用户分析软件V2.05版本和最新CALDBV2.06正式发布,该版本修正了软件中的一些缺陷,并提供了更多的功能模块,,标定和本底参数也有所更新。更新说明可以在门户网站进行查询(http://hxmtweb.ihep.ac.cn/documents/646.jhtml)。此外,为了方便用户利用慧眼卫星开展伽马暴研究,慧眼卫星的伽马暴观测数据已经发布,伽马暴数据分析软件beta 1.4版已于2020年11月发布。
“慧眼”卫星网站为科学用户提供了1级数据产品的下载服务(http://archive.hxmt.cn/proposal )。核心科学组成员可以在线申请保护期内的核心观测数据;客座观测提案PI可以下载相应的提案观测数据;临时ToO和超过保护期的观测数据可公开下载。截止2021年12月31日,网站已提供2439个观测的数据产品以及累计255个伽马暴观测数据的公开下载。


慧眼卫星核心科学研究团队的组成、职责及权利,以及论文署名规则: http://hxmtweb.ihep.ac.cn/policy/84.jhtml




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