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Date and Time of the Query: 2019-05-24 T11:57:31 PDT
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For refcode 2014CBET.3926A...1P:
Retrieve 2 NED objects in this reference.
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NED Abstract

Copyright by Central Bureau for Astronomical Telegrams. 2014CBET.3926A...1P Electronic Telegram No. 3926 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 2014bx IN NGC 6808 = PSN J19435325-7037520 S. Parker, Canterbury, New Zealand, reports the discovery of an apparent supernova (red mag 15.8) on a 30-s unfiltered CCD image (limiting mag 18.5) taken by himself on July 20.483 UT with a 30-cm Astro-Tech AT12RC Ritchey- Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the course of the Backyard Observatory Supernova Search. The new object is located at R.A. = 19h43m53s.25, Decl. = -70d37'52".0 (equinox 2000.0; reference stars from USNO-B and UCAC4 catalogues), which is 4" west and 8" north of the nucleus of the galaxy NGC 6808. Nothing is visible at this position on Digitized Sky Survey red and infrared images (limiting red mag > 19). An image of the variable can be seen via the following website URL: http://tinyurl.com/mx94zz3. The variable was designated PSN J19435325-7037520 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2014bx based on the spectroscopic confirmation reported below. J. Brimacombe, Cairns, Australia, reports that images of 2014bx taken remotely using a 41-cm RCOS telescope (+ luminance filter) at the Warrumbungle Observatory at Siding Spring on July 22.552 reveal mag 16.0 and position end figures 53s.24, 51".8; his images are posted at website URL https://www.flickr.com/photos/43846774@N02/14722391124/. M. Childress, R. Scalzo, F. Yuan, B. Zhang, A. Ruiter, I. Seitenzahl, and B. Schmidt, Australian National University (ANU); and B. Tucker, ANU and University of California at Berkeley, report spectroscopic classification of PSN J19435325-7037520 = SN 2014bx via a 1200-s exposure taken on July 22.48 UT with the with the Wide Field Spectrograph (cf. Dopita et al. 2007, Ap. Space Sci. 310, 255) on the ANU 2.3-m telescope at Siding Spring using the B3000/R3000 gratings (wavelength range 350-980 nm at 0.1-nm resolution). The object exhibits clear type-Ia supernova features such as Si 635.5-nm, Ca H and K, the Ca infrared triplet, the sulphur "W", and the Fe complex around 500 nm. Weak Si 597.2-nm indicates that 2014bx is likely a luminous (slow-declining) type-Ia supernova. The supernova spectrum is highly reddened, with strong Na absorption evident at the redshift of the putative host galaxy, NGC 6808 (z = 0.01157, via the Revised Shapley-Ames Catalogue, 1981). Nebular emission from the host galaxy is also evident at the same redshift. Given the host redshift, the authors measure a Si 635.5-nm velocity of 9800 km/s. Inspection with SNID (Blondin and Tonry, 2007, Ap.J. 666, 1024) shows a good match to SN 2002ck at phase -1 and redshift 0.012. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 July 30 (CBET 3926) Daniel W. E. Green
Retrieve 2 NED objects in this reference.
Please click here for ADS abstract

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