1. Home
  2. Forums
  3. Variable Star Observing
  4. Time Sensitive Alerts

PNV J19321040-2052505: new transient (11.1 mag) in Sagittarius

SPK
Affiliation
Association Française des Observateurs d'Étoiles Variables (AFOEV)
Mon, 11/27/2017 - 16:48

PNV J19321040-2052505 (UGWZ:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=554635

RA 19h32m10.40s, DEC -20°52'50.5" (J2000.0)
2017 Nov. 27.3805 UT, 11.1 mag (CCD, unfiltered)
Discoverer: Hideo Nishimura (Shizuoka-ken, Japan)

2017 11 27.380 UT
Discovered by H. Nishimura, Shizuoka-ken, Japan, with on 10-s exposure on three frames using Canon EOS 6D digital camera + f/3.2 200-mm lens under the limiting mag = 13s, who writes that nothing is visible at this location on a frame taken on 2017 Nov. 24.392 UT. There is a faint star (mag.= 17.8) at end figures 10s.44, 54".1 on USNO-A2 catalog. An image at
http://www.oaa.gr.jp/~oaacs/image/PNinSgr2017.jpg

Follow-up reports:
http://tamkin1.eps.harvard.edu/unconf/followups/J19321040-2052505.html
------------------------------
ASAS-SN Sky Patrol observations (Shappee et al., 2014ApJ...788...48S and Kochanek et al., 2017PASP..129j4502K):
PNVJ19321040-2052505 20171112.018 <16.16V ASN
PNVJ19321040-2052505 20171113.016 <16.07V ASN

A Gaia DR1 source (position end figures 10.37s, 49.5"; G= 19.13 mag) with the following designations is 1" from the reported position of the transient: USNO-B1.0 0691-0831153 (not in USNO-A2.0), GSC2.3 SA2T014548.

Time-resolved photometry, precise astrometry, and spectroscopy are urgently required.

Clear skies,
Patrick

SPK
Affiliation
Association Française des Observateurs d'Étoiles Variables (AFOEV)
Tue, 11/28/2017 - 08:06
Katsumi Yoshimoto's photometry (progenitor candidate confirmed)

2017 11 28.040 UT
Mag. B= 11.52, V= 11.49, position end figures 10s.37, 49".7 observed by K. Yoshimoto, Yamaguchi-ken, Japan, using 0.25-m f/3.4 Mayhill telescope, remotely. An image at
http://orange.zero.jp/k-yoshimoto/PNV-J19321040-2052505.jpg

  • or to post comments