Data

Parkes observations for project P1023 semester 2020APRS_01

Commonwealth Scientific and Industrial Research Organisation
Li, Di ; Dickey, John ; Green, James ; Hobbs, George ; Mader, Stacy ; Chen, Xi ; Zhang, Lei ; Krco, Marko ; Liu, Mengting
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25919/jmyz-yz67&rft.title=Parkes observations for project P1023 semester 2020APRS_01&rft.identifier=10.25919/jmyz-yz67&rft.publisher=Commonwealth Scientific and Industrial Research Organisation (CSIRO)&rft.description=Superradiance (SA) is a well known phenomenon of coherent emission. The first claim of detection of SA in an astronomical setting was made as late as 2016, with new claimed detections in 2019, all on ~100 days' time scale. We propose this exploratory, program to try to identify SA on much shorter time scale in three targets containing strong OH masers. Our key advantages include the unique capability of Parkes UWB in recording OH and CH lines simultaneously and our innovative scheme in calibrating flux as quickly as a fraction of a second. Our goal is to seek correlated flux variation of both OH and CH masing transitions at both short (~s) and long (~3 months) time scales and use HI as a check on the gain. It would be a major discovery if we could detect SA. Otherwise, the proposed observation will still help constrain the excitation conditions of OH an CH ?-doubling transitions, the latter of which has seen much less published masing activities.&rft.creator=Li, Di &rft.creator=Dickey, John &rft.creator=Green, James &rft.creator=Hobbs, George &rft.creator=Mader, Stacy &rft.creator=Chen, Xi &rft.creator=Zhang, Lei &rft.creator=Krco, Marko &rft.creator=Liu, Mengting &rft.date=2020&rft.edition=v1&rft_rights=All Rights (including copyright) CSIRO 2020.&rft_rights=Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/&rft_subject=interstellar medium in and around the Milky Way, P1023_2020APRS&rft_subject=Astronomical and Space Sciences not elsewhere classified&rft_subject=PHYSICAL SCIENCES&rft_subject=ASTRONOMICAL AND SPACE SCIENCES&rft.type=dataset&rft.language=English Access the data

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All Rights (including copyright) CSIRO 2020.

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Brief description

Superradiance (SA) is a well known phenomenon of coherent emission. The first claim of detection of SA in an astronomical setting was made as late as 2016, with new claimed detections in 2019, all on ~100 days' time scale. We propose this exploratory, program to try to identify SA on much shorter time scale in three targets containing strong OH masers. Our key advantages include the unique capability of Parkes UWB in recording OH and CH lines simultaneously and our innovative scheme in calibrating flux as quickly as a fraction of a second. Our goal is to seek correlated flux variation of both OH and CH masing transitions at both short (~s) and long (~3 months) time scales and use HI as a check on the gain. It would be a major discovery if we could detect SA. Otherwise, the proposed observation will still help constrain the excitation conditions of OH an CH ?-doubling transitions, the latter of which has seen much less published masing activities.

Data time period: 2020-04-01 to 2020-09-30

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