AAVSO Alert Notice 482
Monitoring requested for dust production study in developing planetary systems April 4, 2013
Huan Meng and Dr. George Rieke (University of Arizona) have requested AAVSO assistance in monitoring three bright stars with developing planetary systems. The stars have been observed with NASA's Spitzer Space Telescope to have varying levels of dust in the circumstellar disk. These varying levels are thought to be produced through collisions among the asteroid-size debris in the disk. AAVSO monitoring is requested to make certain that the variations are not caused by variability in the stars themselves and for correlation with Spitzer data being obtained. For a more comprehensive explanation of the basis for this campaign, please see their article (http://www.aavso.org/sites/default/files/MengRieke.pdf).
This campaign begins immediately and runs in two segments, now through May and September through December. The targets are
BD+20 307, HD 15407A, and HD 23514; two are 9th magnitude in
V and one is 7th in V. For each target the coordinates, basic photometry, desired time coverage, and comparison star information are given below.
Observations in V are requested, with a S/N of about 100 so that the accuracy will be 1-2%. The comparison stars have been chosen to be within the same field of view as the variable.
TARGET 1: BD+20 307
Coordinates: R.A. 01 54 50.34 Dec. +21 18 22.5 (J2000) B = 9.5, V = 9.0, R = 8.7 Desired Time Coverage: 2013 ASAP - April 21; September 24 - November 17
Comparison star for BD+20 307: choice between two unnamed stars 12th magnitude unnamed star
Coordinates: R.A. 01 54 45.78 Dec. +21 16 55.1 (J2000) V = 12.45 separation on the sky 1.8 arcmin magnitude difference 3.4
or 10th magnitude unnamed star
Coordinates: R.A. 01 54 27.38 Dec. +21 10 46.7 (J2000) V = 10.75 separation on the sky 9.3 arcmin magnitude difference 1.75
TARGET 2: HD 15407A
Coordinates: R.A. 02 30 50.66 Dec. +55 32 54.2 (J2000) B = 7.4, V = 7.0, R = 6.7 Desired Time Coverage: 2013 ASAP - May 14; October 14 - December 18
Comparison star for HD 15407A: HD 15407B
Coordinates: R.A. 02 30 48.6 Dec. +55 33 06.4 (J2000) V = 9.60 separation on the sky 21 arcsec magnitude difference 2.7
TARGET 3: HD 23514
Coordinates: R.A. 03 46 38.40 Dec. +22 55 11.2 (J2000) B = 9.9, V = 9.5, R = 9.2 Desired Time Coverage: 2013 ASAP - May 17; October 21 - December 14
Comparison star for HD 23514 (BD+22 550): BD+22 552
Coordinates: R.A. 03 46 47.06 Dec. +22 54 52.43 (J2000) V = 10.76 separation on the sky 2 arcmin magnitude difference 1.3
Charts for these targets may be created using the AAVSO Variable Star Plotter (http://www.aavso.org/vsp).
Observations should be submitted to the AAVSO International Database using the names BD+20 307, HD 15407A, and HD 23514, respectively.
Regular observations of these stars during these intervals will be very important in analyzing the complex behavior of these systems. All contributions will be appreciated by the astronomers, and continuous monitoring especially so. The astronomers have indicated that observers who have done a significant amount of meaningful work would be co-authors of the resulting paper.
This campaign is being followed on the AAVSO Observing Campaigns page (http://www.aavso.org/observing-campaigns).
This AAVSO Alert Notice was compiled by Elizabeth Waagen.
-------------------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/observing/submit/
ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
An Alert Notice archive is available at the following URL:
http://www.aavso.org/publications/alerts/
Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/publications/email/
Monitoring requested for dust production study in developing
Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
solar research, comet observation, astrometry, etc.
回覆文章
1 篇文章
• 第 1 頁 (共 1 頁)
回到「業餘天文研究專區 Amateur Astronomers' Research Area」
前往
- 天文 ASTRONOMY
- ↳ FAQ 天文
- ↳ 天文話題 Everything about Astronomy
- ↳ 天文攝影 Astrophotography
- ↳ 太陽觀測和攝影 Solar Observation & Photography
- ↳ 望遠鏡 廠制儀器 測試報告專欄 Telescope Testing Report Center
- ↳ 自製天文望遠鏡 Amateur Telescope Making
- ↳ 自製天文儀器 diy Astro Equipment
- ↳ 天文儀器维修中心
- ↳ 廠製儀器 Factory Equipment
- ↳ Raspberry Pi 自動導星裝置 diy Autoguiding
- ↳ 天文台 Observatory
- ↳ 香港搖控天文台 Hong Kong Remote Telescope
- ↳ 玉衡遙控天文台 Jade Scope Observatory
- ↳ 天文物理 Astrophysics
- ↳ 業餘天文研究專區 Amateur Astronomers' Research Area
- ↳ 天文圖像處理技巧 Astro Image Processing Technique
- ↳ 氣象地理 Weather & Geography
- ↳ 天文活動消息 Astro Activity News
- ↳ 論壇公佈
- 風馬牛
- ↳ 談天說地 Chatting Square
- ↳ 花鳥蟲魚 Natural World
- ↳ 太空科技 Space Technology
- ↳ 3D打印 新工藝技術 3D Printing New Technology
- ↳ 電腦資訊科技 Information Technology
- ↳ 旅遊天地 Travelling around the World
- ↳ 談股說金
- ↳ 網站支援 Technical Support
- 姊妹網站
- ↳ 黃隆網站 wonglung.com
- ↳ 天文家園
- 廠商專區 Telescope Suppliers'Area
- ↳ 香港天文儀器
- ↳ 香港遥控天文有限公司
- ↳ 南京英田
- ↳ 江西智通
- ↳ 開信 Kson
- ↳ 日昇儀器社
- ↳ 巨眼儀器社
- ↳ 觀星者天文儀器社
- ↳ 達氏望遠鏡
- ↳ 哈雷
- ↳ 振旺光電 ( 大眾天文 )
- ↳ 博冠望遠镜( 鵬城光學 )
- ↳ GRUS 天文社
- ↳ 多尼爾公司
- ↳ 括蒼天文
- ↳ 宇隆光電
- ↳ 二手交易場 Second Hand Area
- 天文教室
- ↳ diy 磨制牛頓反射鏡 --- 視頻
- ↳ 赤道儀的安裝--怎樣平衡望遠鏡
- ↳ 自制天文望遠鏡 Making Astronomical Telescope
- ↳ 天文攝影入門 Introduction to Astrophotography
- ↳ 天文數碼攝影入門 Digital Astrophotography ABC
- ↳ 天文觀測入門 Introduction to Astro Observation
- ↳ 月食的觀測 Lunar Eclipse Observation
- ↳ 日食的觀測 Solar Eclipse Observation
- ↳ 星星相識 Stars,Constellations & Telescopes ABC
- 會員專區 Members Only
- ↳ 下載區 Download Area
- 石硤尾官立小學;德明中學校友專區 Old Schoolmates' Area
- ↳ 石硤尾官立小學
- ↳ 德明中學
誰在線上
正在瀏覽這個版面的使用者:沒有註冊會員 和 18 位訪客