The Astronomer’s Telegram is a system for reporting and commenting on new astronomical observations. The latest reports are listed here.

ATel 10200: ASASSN-17du: Discovery of A Probable Supernova in SDSS J163319.94...

23 Mar 2017 at 2:08pm
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), 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 SDSS J163319.94+234356.4. ... Read more...

ATel 10199: ASASSN-17ds and ASASSN-17dt: Discovery of Two Probable Supernovae

23 Mar 2017 at 2:08pm
During the ongoing All Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014), using data from the quadruple 14-cm "Brutus" telescope in Haleakala, Hawaii, we discovered two new transient sources, most likely supernovae, in the galaxies IC 0491 and 2MFGC 08661. ... Read more...

ATel 10198: Erratum to ATel 10194: Spectral classification of nuclear transie...

23 Mar 2017 at 6:11am
In the Atel #10194 we have reported incorrect name (Gaia17acn) for supernova Gaia17anc, both in the title and the body of the telegram. Here is the corrected text: Name | RA (J2000) | Dec (J2000) | Disc. ... Read more...

ATel 10197: Spectroscopic Classification of SN 2017cbr as a Type Ia Supernova

23 Mar 2017 at 3:01am
We obtained an optical spectrum (range 340-900 nm) of SN 2017cbr, discovered by the Tsinghua-NAOC Transient Survey (TNTS), on UT Mar.22.7 2017 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Gaomeigu Observatory of Yunnan Observatories (YNAO). ... Read more...

ATel 10194: Spectral classification of nuclear transient Gaia17acn as SN Ia.

22 Mar 2017 at 9:50am
We report the spectroscopic classification of a nuclear transient Gaia17acn discovered by Gaia Science Alerts (http://gsaweb.ast.cam.ac.uk/alerts). The spectrum was obtained using the FOcal Reducer/low dispersion Spectrograph 2 (FORS2) on the Very Large Telescope (VLT). ... Read more...

ATel 10193: Discovery of a Probable Supernova in LEDA 906122

22 Mar 2017 at 9:43am
We report the discovery of a probable supernova in the galaxy LEDA 906122 on a series of 180-s R-band CCD images taken between 2017 Mar. 22.155-22.392 UT with the Danish 1.54-m telescope at La Silla. ... Read more...

ATel 10192: Spectroscopic classification of Gaia17apq and Gaia17apv with Doub...

21 Mar 2017 at 4:31pm
We report the classification of Gaia17apq and Gaia17apv (SN2017cao and SN2017cat), discovered by the Gaia ESA survey. The observations were performed on UT 2017-03-16 with the Double Spectrograph (DBSP; range 350-1000nm, spectral resolution R~4000) on Palomar 200-inch (P200) telescope. ... Read more...

ATel 10191: MASTER: optical transients detection

21 Mar 2017 at 4:18pm
MASTER OT J184906.73-273334.9 detection - possibly CV, Ampl > 2.2 MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 18h 49m 06.73s -27d 33m 34.9s on 2017-03-18.14205 UT. ... Read more...

ATel 10186: Spectroscopic Classification of SN 2017cff (=PTSS-17nem) as a You...

19 Mar 2017 at 10:16pm
We obtained an optical spectrum (range 340-900 nm) of SN 2017cff (=PTSS-17nem), discovered by the PMO-Tsinghua Supernova Survey (PTSS, http://www.cneost.org/ptss/), on UT Mar.19.76 2017 with the 2.4 m telescope (LJT + YFOSC) at LiJiang Gaomeigu Observatory of Yunnan Observatories (YNAO). ... Read more...

ATel 10183: High resolution spectroscopy of the young eruptive star V2492 Cyg...

18 Mar 2017 at 1:45pm
Recently, Ibryamov and Semkov (ATel #10170) have reported on a new record brightness attended by the young eruptive star V2492 Cyg along the complex outburst it started in 2010 (Itagaki CBET #2426, Munari et al. ... Read more...


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