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AAVSO International Database

Alert Notice 558: CI Aql monitoring needed to support HST observations

October 19, 2016: Dr. Edward Sion (Villanova University) has requested AAVSO observers' assistance in monitoring the recurrent nova CI Aql in support of observations with the Hubble Space Telescope Cosmic Origins Spectrograph scheduled for October 31 - November 2, 2016, and November 3 - November 5, 2016. These observations are part of a study on short orbital period recurrent novae as Supernovae Type Ia progenitors.

Alert Notice 557: MASTER OT J010603.18-744715.8 = Nova in SMC (Tucana)

October 17, 2016

Event: Nova in the Small Magellanic Cloud (Tucana)

Discovered by: the MASTER-OAFA auto-detection system (reported by V. Shumkov (Lomonosov Moscow State University) et al. in ATel #9621)

Discovery magnitude: 10.9 unfiltered CCD

Special Notice #423: RX And observations needed urgently now

October 11, 2016: Further to AAVSO Alert Notice 549, observations of the dwarf nova RX And are urgently requested immediately. The system *may* be going into outburst, and confirmation is essential in order to know whether to trigger ToO observations with Chandra and other instrumentation.

Alert Notice 556: Monitoring of V2487 Oph requested

October 4, 2016: Dr. Ashley Pagnotta (Louisiana State University) has requested AAVSO assistance in monitoring the recurrent nova V2487 Oph in order to catch and observe its next outburst.

Alert Notice 555: Correction to Alert Notice 554 on V420 Aur (HD 34921)

October 4, 2016: In AAVSO Alert Notice 554 the star was inadvertently referred to as V420 Oph in the sections creating charts and reporting observations.

Charts with a comparison star sequence for V420 Aur may be created using the AAVSO Variable Star Plotter (VSP).

Please submit observations to the AAVSO International Database using the name V420 AUR.

Coordinates for V420 Aur (2000.0): R.A. 05 22 35.23  Dec. +37 40 33.6

Alert Notice 554: Observations of V420 Aur (HD 34921) needed to support spectroscopy

Note added October 4, 2016: In the original version of this Alert Notice, V420 Aur was referred to as V420 Oph in the sections on creating charts and reporting observations. Also, the range was given as V=7.15-7.35  when the correct value is V=7.35-7.51. The text below has been corrected. Apologies to the PI's for the error.

Special Notice #422: GDS_J1701281-430612 HST observations scheduled

September 30, 2016: Further to AAVSO Alert Notice 551, Dr. Mark Reynolds (University of Michigan) informs us that the cataclysmic variable GDS_J1701281-430612 will be observed by the HST/COS on

07 Oct 2016 at 00:23:57 UT

Alert Notice 553: Nova Lup 2016 = PNV J15290182-4449409 = ASASSN-16kt

September 27, 2016

Event: Nova in Lupus

Discovered by: All Sky Automated Survey for SuperNovae (ASAS-SN) (K. Stanek (Ohio State University) et al., ATel #9538; reported to CBAT via J. Strader (Michigan State University))

Discovery magnitude: 9.11 V +/- 0.01, using ASAS-SN robotic 14-cm telescopes

Discovery date: 2016 September 24.010 UT
Coordinates (2000.0): R.A. 15 29 01.82  Dec. -44 49 40.9

Special Notice #421: SN 2016gkg - Unusual Type-II Supernova in NGC 613 (Scl)

September 22, 2016: SN 2016gkg (announced as AT2016gkg) was discovered by Victor Buso (Rosario, Argentina) on 2016 September 20.2484 UT at CCD magnitude (clear filter) 17.6 +/-0.5, rising to 14.5 +/-0.2 on Sep. 21.1398. His discovery was reported to the Transient Name Server by Sebastian Otero (Buenos Aires, Argentina). It was confirmed by ASAS-SN on Sep. 21.29 UT (B. Nicholls (Mt.

Alert Notice 552: Gaia16aye microlensing event monitoring urgently requested

September 20, 2016 : Dr. Kirill Sokolovsky (National Observatory of Athens and Sternberg Astronomical Institute, Moscow State University), has requested AAVSO assistance in monitoring the ongoing microlensing event Gaia16aye beginning immediately to catch transient behavior occurring now and continuing through the end of October (or until further notice).


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