AAVSO Alert Notice 522
July 1, 2015
V404 Cyg HST multiwavelength observations scheduled
The dramatic outburst of the black hole X-ray transient LMXB V404 Cyg continues. It was detected 2015 June 16.1688 UT at 16.18 CV
+/-0.035 by E. Muyllaert (MUY, Oostende, Belgium); the first
satellite detection was by Swift on June 16.77197 UT (Barthelmy et al., GCN Circular 17929, http://gcn.gsfc.nasa.gov/gcn3/17929.gcn3).
It was announced in AAVSO Alert Notice 520 (http://www.aavso.org/aavso-alert-notice-520).
V404 Cyg has been observed by the professional community across the spectrum from X-ray to radio wavelengths, and by the amateur community in all bands available to it. Large- and small-scale variations have been seen occurring at timescales ranging from seconds to hours, with changes of 2-3 magnitudes seen over the course of a few hours. Most recently Swift has detected a dust halo around V404 Cyg (Beardmore et al., ATel #7736, http://www.astronomerstelegram.org/?read=7736).
C. Knigge (University of Southampton) et al. announce (ATel #7735,
http://www.astronomerstelegram.org/?read=7735) that Far-ultraviolet
(FUV) and near-ultraviolet (NUV) spectroscopic observations of V404 Cyg with the Hubble Space Telescope have been scheduled for 2015 July 10, 11, and 12 according to the schedule below:
FUV: 10 Jul 2015 12:12:19 - 19:23:20 UTC
NUV: 11 Jul 2015 13:37:07 - 16:08:55 UTC
FUV: 12 Jul 2015 11:56:15 - 19:08:08 UTC
The HST observations were scheduled for the satellite's earliest availability, and the timing is best for ground-based locations from the western US and eastern Asia.
Regardless of location, all observers are requested to continue to observe V404 Cyg. Time-series observations are requested during as much of the HST observation intervals as possible, in as many bands as possible. A high cadence is recommended in order to detect the very short-period variations that have been seen.
Observations in the AAVSO International Database show that most recently V404 Cyg was V magnitude 17.352 (June 30.9727 UT, I.
Miller (MIW), Swansea, UK), R=15.795 on July 1.0486 (MJOD, J. L.
Martin, Madrid, Spain), and I=14.469 on July 1.0501 (Martin), but it has been as bright as V=10.868 (June 26.4959, J. Foster (FJQ), Los Angeles, CA) and I=9.102 (June 26.4854 (J. Jones (JJI), Aurora,
CA) and could brighten again. To date, 59 AAVSO observers worldwide have contributed 63,478 V, B, R, I, CV, CR, and visual observations of this outburst of V404 Cyg.
Coordinates: 20 24 03.83 +33 52 02.2 (J2000.0)
Charts for V404 Cyg with a comparison star sequence and a photometry table may be created using the AAVSO Variable Star Plotter (VSP, http:// www.aavso.org/vsp).
Please report observations to the AAVSO International Database using the name V404 CYG. Be sure to include error values and comparison star information.
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
V404 Cyg HST multiwavelength observations scheduled
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 6 位訪客