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ユーザー「arai6a」の検索結果は以下のとおりです。

[Otpical Transient] MisV1444 : spectra

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On April. 10, we obtained optical spectra of MisV1444, which was reported its brightening up in [ vsnet-alert 13124 ].  Spectra of MisV1444 show clearlly TiO band features. MisV1444 may be a Mira varialbe star...

[dwarf nova] MM Hya : optical spectra

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We started spectroscopic observations of MM Hya in the current outburst. The figure shows our spectrum of MM Hya on Apr 10. We detected H-alpha and H-beta features. This suggest that light from an optically thick disk is dominated in the optical wavelength.

[supernova] SN 2011az (= PSN J12535343+3605193)

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We performed optical spectroscopic observations of type-IIP supernova, SN 2011az (c.f. CBET 2680), on Mar. 28.  Broad Balmer emissions of SN and narrow ones of the host galaxy are detected. Absorption components of balmer lines were weak. These features suggest that the SN 2011az is in the early phase of its explosion. 

[comet] C/2011 C1 (McNaught)

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We observed Comet C/2011 C1 (McNaught) on 26 March 2011.

We detected a band emission of CN and Swan bands of C2.

[nova] PNV J18102135-2305306 : spectral confirmation

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We performed spectrocopic observations of PNV J18102135-2305306 on March 28.725 using Araki-telescope and our low-resolution optical spectrograph (LOSA/F2). Our spectra (R~550) show prominent emission lines in H-alpha, H-beta, and Fe II[42,48,49] on a highly reddened continuum. The FWHM of H-alpha emission line is about 900 km/s. Our results suggest that the object is a classical nova with reddened by interstellar matter.

[nova] V5578 Sgr : update spectra

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We update spectra of V5578 Sgr. The nova shows slow spectral developments.

[nova] V5578 Sgr : update spectra

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We update our spectra of V5578 Sgr. Emission lines are gradually evolving.

[nova] Nova Sgr 2011: spectral development

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We found that intriguing features in spectra of V5587 Sgr (Nova Sgr 2011).  It showed a re-growth of absorption components in P-Cygni profiles for H-beta and other lines on 21 Feb. These features are often observed when rebrightening events of classical novae (Tanaka+2010). We continue observations of this object.

[dwarf nova] SDSS J133941.11+484727.5 : spectroscopy on Feb. 9

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We performed spectroscopic observations of SDSS J133941.11+484727.5 on Feb. 9 (UT).

Our preliminary spectrum is shown in the figure.  The prominent H-alpha emission exists in its absorption component. Bload absorption lines are shown for H-beta, H-gamma, H-delta and He I (4471A).  These spectral features also indicate that the object is a dwarf nova as already reported in vsnet-alert 12807, 12816, 12817. The Bowen complex of NIII, CIII are possiblily detected, but He II (4686A) is not seen in our data. These lines are observed during outbursting phase of well observed WZ-Sge stars, WZ Sge, GW Lib and V455 And. Temperatures of excited region of SDSS J1339 might be lower than those in them.  We continue time-resolved observations of this dwarf nova.

[nova] V1280 Sco (= Nova Sco 2007 No.1)

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We start spectroscopic monitorings of V1280 Sco in the season 2011. The Balmer, He I and [O I] emission lines still remain strong on a strong continuum emission as observed in the last summer. These indicate that the nova wind is still strong.

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