궁수자리에 밝은 신성 출현

궁수자리에 밝은 신성 출현.

Bright nova in the heart of Sagittarius.

한국 시간으로 3월 16일 00시 13분에 호주의 John Seach가 궁수자리에서 6.0등급의 새로운 천체(PNV J18365700-2855420)를 발견하였다.

16일 영국 리버풀 망원경으로 분광 관측이 이루어져 확인되었다. 

신성의 위치 좌표: 적경(RA) 18h 36m 57.00s , 적위(DEC) -28 °55' 42.0 " (2000년 분점)

3월 19일 현재 밝기는 약 5.5등급으로 더 밝아졌다. 맨눈으로 관측하기에는 고도가 낮아서 쉽지가 않고 쌍안경을 이용하면 쉽게 관측이 가능하다.

앞으로의 광도 변화에도 주목할만하다.

https://t1.daumcdn.net/cfile/tistory/276CDE38550A0CB725

https://t1.daumcdn.net/cfile/tistory/21799534550A0CDF28

https://t1.daumcdn.net/cfile/tistory/2146DB36550A0CF32C

https://t1.daumcdn.net/cfile/tistory/266BEF38550A0D0627

Adriano Valvasori imaged the nova at March 16.71, using the iTelescope robotic telescope “T9” — a 0.32-m (12.5-inch) reflector in Australia.

Bright nova in the heart of Sagittarius.

March 15th, nova hunter John Seach of Chatsworth Island, NSW, Australia, found a new 6th-magnitude star shining in three search images taken by his DSLR patrol camera. 

The time of the photos was March 15.634 UT. 

A 6th-magnitude nova has erupted inside the Sagittarius Teapot. It's in easy range of binoculars just before dawn. Will it brighten further? 

R.A. = 18 36 56.85, Decl.= -28 55 40.0 (equinox 2000.0).

http://www.skyandtelescope.com/astronomy-news/observing-news/6th-mag-nova-in-sagittarius-still-brightening/

http://www.aavso.org/aavso-alert-notice-512

http://www.aavso.org/lcg/plot?auid=000-BLP-536&starname=PNV+J18365700-2855420&start=2457096.5&stop=2457106.5&obscode=&obscode_symbol=2&obstotals=no&calendar=calendar&forcetics=&grid=on&visual=on&r=on&fainterthan=on&bband=on&v=on&unvalidated=on&pointsize=1&width=800&height=450&mag1=&mag2=&mean=&vmean=

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2015 03 15.634

Possible nova in Sagittarius discovered by John Seach, Chatsworth Island, NSW, Australia. Magnitude 6.0 object visible on 3 images taken with DSLR and 50mm f/1.0 lens, limiting magnitude 11.0. No object visible on images taken with same instrument on March 14.590 UT, limiting magnitude 10.5. No bright variable star, or minor planet at location.

Alert Notice 512: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420

March 16, 2015

Event: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420

Discovered by: John Seach, Chatsworth Island, NSW, Australia

Discovery magnitude: 6.0 using DSLR and 50mm f/1.0 lens

Discovery date: 2015 March 15.634 UT

Coordinates:  R.A. 18 36 56.84   Dec. -28 55 39.8  (2000.0)

Spectra: An optical spectrum by S. C. Williams (Liverpool John Moores University) et al. (ATel #7230) obtained 2015 March 16.27 UT using the FRODOspec spectrograph on the Liverpool Telescope at 2015 March 16.27 UT indicates N Sgr 2015 No. 2 is a classical Fe II nova.

J. Powles (PJOC, Latham, ACT, Australia) reports a low-resolution (R=260, 150 l/mm) spectrum obtained by him appears to be that of a Fe II nova shortly after maximum.

Observing recommendations: Observations of all types (visual, CCD, DSLR, spectroscopy) are strongly encouraged as this nova evolves. T. Finzell (Michigan State University) requests ongoing optical coverage in support of radio and x-ray observations being scheduled.

Charts: Charts for Nova Sgr 2015 No. 2 may be created using the AAVSO Variable Star Plotter (VSP) at http://www.aavso.org/vsp. A binocular sequence for this nova is being created. However, comparison stars may be found now using VSP and requesting an 'a' or 'b' scale chart.

Observations reported to the AAVSO:

2015 Mar. 15.802 UT, 5.3 (K. Itagaki, Yamagata, Japan);

16.3131, 5.8 (AAX, A. Amorim, Florianapolis, Brazil);

16.3375, 5.9 (CLUB, L. Camargo da Silva, Brazil);

16.3604, 6.1 (Camargo da Silva);

16.5275, 5.8 R-CCD (E. Guido and N. Howes, 0.61-m f/6.5 astrograph+CCD) of ITelescope network (MPC Code U69, Auberry, CA);

16.74861, 6.0 (PEX, A. Pearce, Nedlands, WA, Australia);

16.77, 6.0 (CMQ, P. Camilleri, Warners Bay, Newcastle, NSW, Australia);