Liens Astro

Supernova SN2014J

dans M82

The Astronomer's Telegramm

Instrument: CN212, Alpy 600, ST7E, Lodestar ( autoguideur), Mach1

Observatoire: SMU Castor

Date: 31-01-2014

NB.: No Hydrogen lines visible -----> Type Ia Supernova

(Illustration credit: NASA,ESA,and A.Field (STScI))

Iimage de M82 avec SN2014J (autoguideur lodestar, temps de pose: 60 s)

Text de Robert Gendler:

La différence entre les 2 spectres met en évidence un problème de correction de réponse d'instrument!

Comparison from Gelato

Low-resolution optical spectrum of the type Ia supernova SN 2014J discovered in the galaxy M 82 obtained using the ACAM instrument at the Cassegrain focus of the 4.2m William Herschel Telescope (WHT) (Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain). The intensity or relative flux (“Arbitrary Flux”, vertical axis) is plotted versus wavelength (“colour”, horizontal axis). The main features, which includes absorption lines of iron, magnesium, silicon, sodium, calcium, oxygen and carbon, are labelled. The spectrum combines two expositions of 200 seconds each using the ACAM V400 grism. The data were obtained last 25th January at 7:10 UT, which approximately corresponds to Epoch -11 days. It is expected the supernova reaches its maximum brightness in that time. The reduction of the data and the wavelength calibration was performed using standard IRAF routines.
Credit: Observers: Manuel E. Moreno-Raya (CIEMAT, Spain) & Lluís Galbany (DAS / UC, Chile). Data processing and color image composition: Ángel R. López-Sánchez (AAO / MQ, Australia). Support astronomer: Chris Benn (ING, UK), Telescope Operator: José Norberto González (ING, UK). Research Team: Manuel E. Moreno-Raya (CIEMAT, Spain), Mercedes Mollá (CIEMAT, Spain), Ángel R. López-Sánchez (AAO / MQ, Australia), Lluís Galbany (DAS / UC, Chile),Aurelio Carnero (ON, Brazil), Inma Domínguez (UGR, Spain), & Pepe Vílchez (CSIC / IAA, Spain).