AAVSO Alert Notice 586
Status of 20 cataclysmic variables needed for WHT campaign
July 7, 2017: Roque Ruiz-Carmona (Ph.D. candidate, Institute of Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, The Netherlands) has requested AAVSO assistance in determining the status of 20 eclipsing cataclysmic variables (CVs) in order to select one system in outburst for observation with the William Herschel Telescope (WHT) at La Palma, to detect and study spiral density waves in the system. The WHT observations will begin on 2017 July 11 UT.
This campaign is identical in format to the ones successfully carried out by the AAVSO on his behalf in 2015 (AAVSO Alert Notices 524 and 527) and 2016 (AAVSO Alert Notice 543).
It is essential to know whether the potential targets are in outburst or quiescence. To this end, the PI has requested that our observers obtain one image of each target on each of TWO separate nights so he may analyze them to determine the system he will observe with WHT.
One image of each target should be obtained on each of the following nights:
- between 9 July 15:00 UT and 10 July 15:00 UT
- between 10 July 15:00 UT and 11 July 15:00 UT
***The images must be posted to the thread no later than 11 July 16:00 UT.***
Observers should post their images to the thread ("2017 20 PTF CVs campaign") in the AAVSO Campaigns & Observation Reports forum (https://www.aavso.org/2017-20-ptf-cvs-campaign), and include the date/time, filter, and exposure in the posting.
It is not necessary to determine and submit a magnitude estimate of each target, just to obtain the images and place them where the PI can access them. Any filter may be used, and raw or reduced images of each target should be posted in the forum. If a star is not visible, an image of the field that shows an upper limit reasonably below the outburst magnitude is fine.
**Only one image per observer per target per night should be submitted. Please do not submit multiple images of any target obtained by you on the same night.**
An observer does not have to take images of the same targets on both nights (although that would be ideal); if conditions change between the nights, whatever images can be obtained will be extremely helpful.
The table of targets is given below. Some of the targets are quite faint, and stacking of images may be necessary. The maximum size of an image file that can be uploaded to the Forum thread is 40 MB, so if any files are larger, please trim the image(s).
PTF ID Primary Name (VSX) RA (2000) DEC (2000) PTF Ref Mag Outburst Mag
AAVSO Filter
AAVSO Min AAVSO Max Priority
PTFS1115ag SDSS J154453.60+255348.8 15:44:53.62 +25:53:48.9 16.29 16.00 CV <18 15.70 Medium
PTFS1115an BT CrB 15:56:56.92 +35:23:36.7 18.39 17.00 CR 19.20 16.70 High
PTFS1116ci V1227 Her 16:53:59.05 +20:10:10.6 17.66 15.25 V 18.10 14.60 High
PTFS1516bi V1032 Oph 16:26:09.7 -03:53:25.1 16.62 15.00 V 19.00 15.10 High
PTFS1716bd CSS 090419 J162620-125557 16:26:19.9 -12:55:56.1 20.31 19.80 CV 20.40 16.80 Medium
PTFS1117b V1239 Her 17:02:13.26 +32:29:54.0 17.78 13.50 V 19.10 13.70 High
PTFS1518ek EX Dra 18:04:14.11 +67:54:12.1 14.45 13.50 B 17.20 13.50 High
V416 Dra V416 Dra 18:57:20.4 +71:31:19.1 ---- ---- V 17.30 12.70 High
PTFS1719dx V447 Lyr 19:00:19.9 +44:27:45.1 20.86 18.00 B 21.00 17.50 High
PTFS1519p CG Dra 19:07:32.8 +52:58:29.1 16.34 15.40 p 17.50 15.00 Medium
J1927+4447 KIS J192748.53+444724.5 19:27:48.5 +44:47:25.1 ---- ---- Kp 18.40 16.00 High
PTFS1719dy WY Sge 19:32:43.8 +17:44:55.1 18.00 17.50 B 20.70 5.40 Medium
EM Cyg EM Cyg 19:38:40.1 +30:30:28.1 ---- ---- p 14.40 11.90 Medium
PTFS1620k WZ Sge 20:07:36.46 +17:42:14.7 15.26 15.10 B 15.53 7.00 Medium
PTFS1720ea V713 Cep 20:46:38.7 +60:38:04.1 18.40 15.50 B 18.80 15.30 Medium
PTFS1520cd ASASSN-13cg 20:52:52.7 -02:39:53.1 18.55 18.00 V 18.30 13.10 High
PTFS1121aq CSS 110513:210846-035031 21:08:46.4 -03:50:32.1 17.65 15.00 CV 19.60 14.90 High
PTFS1721bs SS Cyg 21:42:42.79 +43:35:09.9 15.68 ---- V 12.40 7.70 High
PTFS1122t V367 Peg 22:45:00.73 +16:55:13.3 18.02 15.75 CV 18.90 14.70 Medium
PTFS1523u IP Peg 23:23:08.60 +18:24:59.6 15.01 14.20 B 18.60 12.00 High
Observers should use the charts supplied by the PI. PDF images of PTF (Palomar Transient Factory) close-up finder charts containing the targets and offset stars chosen by the PI, and some AAVSO charts prepared by the PI, may be downloaded here.
Please be sure that each image includes the offset stars, especially if you trim it so its size is less than 40MB.
Because the windows for observation by AAVSO observers are relatively short and the target list is quite long, it is recommended that observers coordinate their observing plans so that all of the targets are covered on both nights if at all possible. Please use the forum thread given above to post what targets you plan to observe; if you see that more difficult targets are not being covered and you can observe them, your doing so would be greatly appreciated.
This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.
----------------------------------
SUBMIT OBSERVATIONS TO THE AAVSO
Information on submitting observations to the AAVSO may be found at:
http://www.aavso.org/webobs
ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION
An Alert Notice archive is available at the following URL:
http://www.aavso.org/alert-notice-archive
Subscribing and Unsubscribing may be done at the following URL:
http://www.aavso.org/observation-notifi ... ertnotices
Status of 20 cataclysmic variables needed for WHT campaign
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 8 位訪客