M66的超新星
本帖最后由 Linqisheng 于 2016-6-3 14:51 编辑最近獅子座的M66星系的漩臂上出現一顆超新星
如圖片圈處 , 6月1日晚上 , 高橋MT160拍攝 , EM200_OAG導星 , 480秒曝光 , 650D宇隆改機 , ISO1600 , 只簡單處理色彩跟亮度 .
这颗星是银河系内还是m66的呢？ 银河系内不可能是一个点吧，怎么也应该会达到天狼心得亮度。楼主能把前后对比图发出来就更好了。 M66是星系 .
拍滴不错！ 求对比图! archfalcon 发表于 2016-6-3 14:28
银河系内不可能是一个点吧，怎么也应该会达到天狼心得亮度。楼主能把前后对比图发出来就更好了。 ...
那你又说错，你所能观察到的恒星绝大多数是银河系内的，大多数都是一个点。{:5_283:}
赞，明晚第一个目标就他了 weiguo1688 发表于 2016-6-3 15:32
那你又说错，你所能观察到的恒星绝大多数是银河系内的，大多数都是一个点。
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我意思是银河系内的超新星爆炸，亮度至少达到天狼星级别。
真是抱歉， 那只是一个普通的星星·已从多张m66的其他照片证实。 moco558 发表于 2016-6-3 16:24
真是抱歉， 那只是一个普通的星星·已从多张m66的其他照片证实。
照片一
本帖最后由 Linqisheng 于 2016-6-3 17:34 编辑
那就是我錯了 , 致歉 . 本帖就可關畢 . 真是烏龍一場 . 請把照片當漂亮的星系一看即可 .
Linqisheng 发表于 2016-6-3 17:18
那就是我錯了 , 致歉 . 本帖就可關畢 . 真是烏龍一場 . 請把照片當漂亮的星系一看即可 .
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http://earthsky.org/todays-image/supernova-erupts-in-m66
4天前确认的，位置一样，应该没错
这么好的镜子为啥就配了个650d 器材相互搭配使用 . DSLR有其方便之處 .
超新星爆发亮度可是原来的上万倍，如果是外星系，虽然白天看不见，但是至少晚上比木星还要亮吧，撇开比不比木星亮，但至少看得见，但我晚上可没有看见这种亮度的星星 FSQ 发表于 2016-6-3 20:32
超新星爆发亮度可是原来的上万倍，如果是外星系，虽然白天看不见，但是至少晚上比木星还要亮吧，撇开比不比 ...
举个例子，2011年M101中（距离2300万光年）出现的SN2011fe是一颗Ia型超新星，最亮的时候9.9等，肉眼不可见。要知道Ia型超新星比绝大多数其他类型的都要亮2-4等。 FSQ 发表于 2016-6-3 20:32
超新星爆发亮度可是原来的上万倍，如果是外星系，虽然白天看不见，但是至少晚上比木星还要亮吧，撇开比不比 ...
系外恒星比木星亮真是想多了。。。天上肉眼可见的所有恒星都是银河系内的。系外恒星根本难以捕捉单个恒星的光点。
M66距离3500万光年，按木星的-2等计算，绝对星等M=-2+5*log10(32.616/35,000,000)=-32等
这次M66的超新星鉴定结果是II-P型超新星，最高亮度也不过绝对星等-17等
附上超新星发现报告：
http://www.astronomerstelegram.org/?read=9091
ASASSN-16fq: Discovery of A Probable Supernova in M66ATel #9091; G. Bock (Runaway Bay Observatory, Australia), Subo Dong(KIAA-PKU), C. S. Kochanek, K. Z. Stanek, J. S. Brown, T. W.-S. Holoien, D. Godoy-Rivera, U. Basu (Ohio State), B. J. Shappee (Hubble Fellow, Carnegie Observatories), J. L. Prieto (Diego Portales; MAS), D. Bersier (LJMU), Ping Chen (KIAA-PKU), J. Brimacombe (Coral Towers Observatory)
on 28 May 2016; 13:15 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Subo Dong (dongsubo@pku.edu.cn)Subjects: Optical, Supernovae
Referred to by ATel #: 9093, 9094
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN or "Assassin"), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered a new transient source, most likely a supernova, in the galaxy M66.ASASSN-16fq (AT 2016cok) was discovered in images obtained on UT 2016-05-28.30 at V ~ 16.7 mag. We do not detect (V>17.1) the object in images taken on UT 2016-05-24.32 and before. An image obtained on UT 2016-05-28.47 by G. Bock confirms the discovery of the transient. This figure shows the archival DSS image of the host (left) and the G. Bock confirmation image (right). The red circle has a radius of 10" and is centered on the position of the transient in the G. Bock image.The position of ASASSN-16fq is approximately 69" from the center of the galaxy M66 (z=0.002425, d=10 Mpc, via NED), giving an absolute V-band magnitude of approximately -13.4 (m-M=30, A_V=0.09). Properties of the new source and photometry are summarized in the tables below:Object RA (J2000) DEC (J2000) Disc. UT Date Disc. V magApprox. Abs. Mag Offset from Host ('')ASASSN-16fq11:20:19.09 +12:58:57.2 2016-05-28.30 16.7 -13.4 69 Obs. UT Date V mag2016-05-24.32 >17.12016-05-28.30 16.7Follow-up observations are encouraged.While we are participating in the TNS system to minimize potential confusion, ASAS-SN will continue using ASASSN-16xx transient names as our primary nomenclature (including supernovae, but also other classes of transients), and we encourage others to do the same. We prefer merging the names as ASASSN-16xx (AT2016xyz) to preserve, rather than anonymize, the origin of the transient.We thank LCOGT and its staff for their continued support of ASAS-SN. ASAS-SN is supported by NSF grant AST-1515927, the Center for Cosmology and AstroParticle Physics (CCAPP) at OSU, the Mt. Cuba Astronomical Foundation, George Skestos, and the Robert Martin Ayers Sciences Fund. For more information about the ASAS-SN project, see the ASAS-SN Homepage and the list of all ASAS-SN transients.
Spectroscopic Classification of ASASSN-16fq (=SN 2016cok) as a Type IIP Supernova
ATel #9093; Jujia Zhang (YNAO), Xiangming Zheng (YNAO), Xiaofeng Wang (Tsinghua University), and Liming Rui (Tsinghua University)
on 28 May 2016; 16:38 UT
Distributed as an Instant Email Notice Supernovae
Credential Certification: Xiaofeng Wang (wang_xf@mail.tsinghua.edu.cn)
Subjects: Optical, Supernovae, Transient
Referred to by ATel #: 9094
We obtained an optical spectrum (range 350-910 nm) of ASASSN-16fq/SN 2016cok (ATel#9091) on UT May 28.63 2016 with the 2.4-m telescope (+YFOSC) at LiJiang Gaomeigu Station of Yunnan Astronomical Observatories (YNAO). The spectrum is consistent with a type IIP supernova at a few days before the maximum light, showing a blue continuum and prominent P-Cygni features of Balmer lines. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J., 666, 1024) shows that it matches with SN 1999em at t = -3 days from the maximum light. After correcting for a redshift of 0.002 for its host galaxy M66, an expansion velocity of about 9000 km/s can be derived from the absorption minimum of Ha line. davepotter 发表于 2016-6-3 17:46
http://earthsky.org/todays-image/supernova-erupts-in-m66
4天前确认的，位置一样，应该没错
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多謝確認 .
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