AAVSO Alert Notice

Alert Notice 515: SN 2015F in NGC 2442 (PSN J07361576-6930230)

March 31, 2015

Event: Supernova in NGC 2442: SN 2015F = PSN J07361576-6930230

Discovered by: Libert A. G. Monard, Calitzdorp, Western Cape, South Africa

Discovery magnitude: 16.8 unfiltered CCD using a 35-cm RCX400 telescope (+SBIG ST8-XME camera)

Discovery date: 2015 March 9.789 UT

Coordinates:  R.A. 07 36 15.76   Dec. -69 30 23.0  (2000.0)
SN 2015F is located 40" west and 84" north of the center of NGC 2442.

Alert Notice 514: RW Aur monitoring requested

Note: A thread for this campaign has been created in the AAVSO Campaigns and Observation Reports discussion forum:  https://www.aavso.org/rw-aur-monitoring

This campaign has been extended at least through 2022. Please continue to monitor RW Aur until further notice.  -  Elizabeth O. Waagen, 17 April 2020

Campaign extended through 2018.  Also, campaign updated in  Special Notice #402 (20150413).

Alert Notice 513: Request for observations of GW Lib in support of HST observations

March 18, 2015: Dr. Paula Szkody, University of Washington, has requested our help in monitoring the cataclysmic variable GW Lib for upcoming Hubble Space Telescope observations, scheduled to be made during the window 2015 April 22-25 UT. Dr. Szkody also observed this object with HST in March 2011 and March 2010 (see AAVSO Alert Notices 433 and 417, respectively).

Alert Notice 512: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420 [V5668 Sgr]

March 16, 2015

Event: Nova Sagittarii 2015 No. 2 = PNV J18365700-2855420 [V5668 Sgr]

Discovered by: John Seach, Chatsworth Island, NSW, Australia

Discovery magnitude: 6.0 using DSLR and 50mm f/1.0 lens

Discovery date: 2015 March 15.634 UT

Coordinates:  R.A. 18 36 56.84   Dec. -28 55 39.8  (2000.0)

Alert Notice 511: Monitoring requested for developing planetary systems dust production study

Campaign continued through 2017 at least. Also, campaign updated in  AAVSO Special Notice #408 (20151002).

March 13, 2015: Dr. George Rieke (University of Arizona) and colleagues have requested AAVSO assistance in monitoring four stars with developing planetary systems. The targets are RZ Psc, HD 15407A, V488 Per, and HD 23514. This campaign is similar to the one conducted in 2013 (see AAVSO Alert Notice 482).

Alert Notice 510: Observations of the symbiotic nova ASAS J174600-2321.3

March 5, 2015: The AAVSO is requesting observations of the symbiotic nova candidate ASAS J174600-2321.3 during the predicted upcoming eclipse of this system. Observers are asked to begin observing immediately (2015 March 5), and continue observations through the end of July 2015.  Both visual and instrumental observations are encouraged; the object was at V=12.28 on 2015 February 6.764 (OCN; S.

Alert Notice 509: Nova Sagittarii 2015 = PNV J18142514-2554343 [V5667 Sgr]

February 18, 2015

Event: Nova Sagittarii 2015 = PNV J18142514-2554343  [V5667 Sgr]

Discovered independently by:
- Hideo Nishimura (Shizuoka-ken, Japan)
- Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)

Discovery magnitude:
- Nishimura: DSLR magnitude 11.2, using 200-mm f/3.2 lens + digital camera
- Nishiyama and Kabashima: unfiltered CCD magnitude 10.9, using a 105-mm f/4 camera lens (+SBIG STL6303E camera)

Alert Notice PEP #0: Multiwavelength monitoring of 2349+28 II Pegasi

October 4, 1991

Note: This Notice was originally titled:
SPECIAL AAVSO ALERT NOTICE TO PHOTOELECTRIC PHOTOMETRISTS MULTIWAVELENGTH MONITORING OF 2349+28 II PEGASI

It has been given the somewhat odd name "Alert Notice PEP #0" in 2014 so it will fit in with the other special PEP Alert Notices created by Aaron Price in 2001-2004. Eventually all of these special PEP Alert Notices will be renamed to something more consistent with Alert and Special Notice procotols. EOW 10/27/2014

Alert Notice 505: Monitoring of Northern dwarf novae for radio jets campaign

October 24, 2014: Ms. Deanne Coppejans (PhD candidate, Radboud University Nijmegen (Netherlands) and University of Cape Town) and colleagues have requested AAVSO observer assistance in monitoring several dwarf novae in support of their campaign to observe them in outburst with the Very Large Array (VLA) to search for radio jets.

Alert Notice 504: Epsilon Aur monitoring during predicted pulsation phase

Note: A thread for this campaign has been created in the AAVSO Campaigns and Observation Reports discussion forum: https://www.aavso.org/eps-aur-monitoring

CONTINUED AT LEAST THROUGH 2021  -  Elizabeth O. Waagen, 17 April 2020

September 17, 2014: Dr. Robert Stencel (University of Denver Astronomy Program) has requested that AAVSO observers monitor epsilon Aurigae from now through the end of the observing season.