大溪天文台觀測日誌 TYGA TW大溪天文台 TYGA TW(AAVSO)觀測 SN 2023ixf in M101 超新星亮度例行觀測2023年07月14日 大溪 晴到多雲 風速: 1 級
Celestron 14" SCT F/3.6 (f 1288mm 1.1 arcsec/pixel resolution) +SBIG ST-10XME 自由追蹤 (POLEMASTER 2017 0805 校對) Showa 20E kai +NS5000 for SHOWA20E(測試中).+TheSky GOTO system.
#.0.33 reducer: NextGen MAXfield NGM 0.33X Telecompressor Lens
0714 溫度:31.6度C 濕度: 60% 風:0-1級
觀測項目:
2023 SN 2023 ixf in M101
測量光度: Johnson Visual , Johnson Blue , Bessell Red 單色光 濾鏡
觀測儀器: 35cm F3.6 SCT + SBIG ST-10 XME (Monochrome) 溫度0-1度C 曝光 90-100秒 Showa 20E + NS5000 導引系統 自由追蹤
Observations submitted since last login:
2023 0525 - 0527SN2023 ixf RA=10h03m39.7s Dec=+54d18'46" photometry and astrometry by astroart5.0
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Name JD CalendarDate Mag Filter Chart/Soft
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1 SN 2023ixf 2460090.0375 2023 May 25.5375 11.0 Johnson V ensemble ASTROART5.0 N
2 SN 2023ixf 2460090.04028 2023 May 25.5403 11.1 Cousins R ensemble ASTROART5.0 N
3 SN 2023ixf 2460090.04514 2023 May 25.5451 11.2 Johnson B ensemble ASTROART5.0 N
4 SN 2023ixf 2460091.02431 2023 May 26.5243 11.2 Johnson V ensemble ASTROART5.0 N
5 SN 2023ixf 2460091.02708 2023 May 26.5271 11.0 Cousins R ensemble ASTROART5.0 N
6 SN 2023ixf 2460091.03194 2023 May 26.5319 11.1 Johnson B ensemble ASTROART5.0 N
7 SN 2023ixf 2460092.05278 2023 May 27.5528 11.3 Johnson V ensemble ASTROART5.0 N
8 SN 2023ixf 2460092.05694 2023 May 27.5569 10.9 Cousins R ensemble ASTROART5.0 N
9 SN 2023ixf 2460092.06181 2023 May 27.5618 11.0 Johnson B ensemble ASTROART5.0 N
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Color index:
0525 B-V=+0.2
0526 B-V=-0.1
0527 B-V=-0.3Observations submitted since last login:
2023 0603-------------------------------------------------------------------------------------------------------------------------------------------------
Name JD CalendarDate Mag Filter Chart
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1 SN 2023ixf 2460098.07917 2023 Jun 2.5792 11.1 Johnson V ensemble ASTROART5.0 N
2 SN 2023ixf 2460099.02361 2023 Jun 3.5236 11.1 Johnson V ensemble ASTROART5.0 N
3 SN 2023ixf 2460099.02986 2023 Jun 3.5299 10.9 Cousins R ensemble ASTROART5.0 N
4 SN 2023ixf 2460099.02639 2023 Jun 3.5264 11.5 Johnson B ensemble ASTROART5.0 N
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Color index:
0603 B-V=+0.4Observations submitted since last login:
2023 0619-----------------------------------------------------------------------------------------------------------------------------------------------------
Name JD CalendarDate Mag Filter Chart
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1 SN 2023ixf 2460115.21181 2023 Jun 19.7118 11.6 Johnson V ensemble ASTROART5.0 N
2 SN 2023ixf 2460115.21528 2023 Jun 19.7153 12.3 Johnson B ensemble ASTROART5.0 N
3 SN 2023ixf 2460117.15833 2023 Jun 21.6583 12.2 Johnson V ensemble ASTROART5.0 N*------------------------------------------------------------------------------------------------------------------------------------------------------
Color index:
06019 B-V=+0.7Observations submitted since last login:
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Name JD CalendarDate Mag Filter Chart
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1 SN 2023ixf 2460133.98264 2023 Jul 8.4826 12.0 Johnson V ensemble ASTROART5.0 N
2 SN 2023ixf 2460133.98958 2023 Jul 8.4896 12.9 Johnson B ensemble ASTROART5.0 N
3 SN 2023ixf 2460133.99653 2023 Jul 8.4965 11.8 Cousins R ensemble ASTROART5.0 N
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Color index:
0708 B-V=+0.9Observations submitted since last login:
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Name JD CalendarDate Mag Filter Chart
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1 SN 2023ixf 2460139.98264 2023 Jul 14.4826 12.2 Johnson V ensemble ASTROART5.0 N
2 SN 2023ixf 2460139.98958 2023 Jul 14.4896 13.1 Johnson B ensemble ASTROART5.0 N
3 SN 2023ixf 2460139.99375 2023 Jul 14.4937 11.7 Cousins R ensemble ASTROART5.0 N
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Color index:
0714 B-V=+0.9#.SN2023 ixf 爆發後, 為 SN II Type超新星,其藍色光星等會逐漸地變暗。其曲線變化為最後一圖
天文學家理論認為, SNII -L的較線性曲線表現可能僅僅是因為SNII -L 的恆星氫氣包覆要小得多。
這次觀測SN2023 ixf 雖屬 II Type,但光度的變化還是早期階段,還是要靠未來段觀測才可判定是走II -P 還是II-L 曲線。
This graph of the luminosity as a function of time shows the characteristic shapes of the light curves for a Type II-L and II-P supernova.
https://en.wikipedia.org/wiki/Type_II_supernova老貓物語:Light curves for Type II-L and Type II-P supernova:SN2023 ixf 爆發後, 為 SN II Type超新星(大爆炸後的重力崩陷) II type的觀測亮度,其光度在爆發初期,雖然快速星等上升到峰值亮度,然後下降! 這些光度曲線的平均衰減率為每天0.008星等.也遠低於Ia型超新星的衰變率。II型根據光曲線的形狀分為兩類。II-L TYPE 超新星的光度曲線在峰值亮度之後顯示出穩定的(線性)下降。II-P TYPE則呈現非線性曲線.B-V 色指數曲線在色光上亮度差異並不大!
老貓曰: 在5月25日的觀測, 光度在色光的數據, 可見光和藍光.紅光的數據較為接近. B-V=+0.2 - -0.3 ,但在6月3日的觀測中, 可見光光度和藍光差異增加 B-V=+0.4 且紅光亮度開始變亮! 6月19日 B-V=+0.7 藍光逐漸變暗. 紅光無觀測. 7月8日/7月14日 B-V=+0.9 BV color index 逐漸增加 !
望遠鏡:Celestron 14" SCT F/3.6
焦距為 1288mm
取樣CCD: 美國 SBIG ST-10XME 總畫素: 3.2 megapixel, 感光器畫素: 2184 x 1472 pixel 畫素尺寸: 6.8 micron, 感光器尺寸: 14.9 x 10.2mm.
感光器/系統光學解析: 每像素 1.1弧秒/畫素 (arc sec/pixel resolution)
地區: 台灣 桃園 大溪地區 視狀 (Seeing Field) =1.5 -2 arc sec 的典型光害地區 夜空視野下進行星點取樣.
CHROMA V -Bessell :
用於天文觀測的最高品質濾鏡,採用優質光學玻璃基板並使用耐用的電子噴射硬塗鍍膜層。所有鍍膜都塗在正面,吸收雜光的抗反射鍍膜在背面,以防止重影並最大限度地提高單色光透射率。
它極其精密和精確,其特定透光光譜穩定,不會因溫度和濕度變化而發生波長位移。
圖1: 2023 0714 SN2023ixf 超新星 三色合成 擬似彩色影像
圖2: 2023 0714 SN 2023ixf 超新星 V band 亮度測定 (GSC 星圖系統)
圖3: AAVSO 2023 0714 最新 大溪天文台和世界各觀測站數據 SN 2023ixf 超新星 亮度曲線變化
曹大貓咪 2023 0717 台北市