TCP J07134590-2112330 (UG:)
RA 07h13m45.90s, DEC -21°12'33.0" (J2000.0)
2018 March 24.4964 UT, 12.0 mag (CCD, unfiltered)
Discoverer: Yuji Nakamura (Kameyama, Mie, Japan)
2018 03 24.4964 UT
Yuji Nakamura, Kameyama, Mie, Japan, reports his discovery of this TCP (mag 12.0) in CMa on a CCD frame taken on 2018 Mar 24.4964 UT (limiting mag 15.1) using a 10cm reflector F3.0 telescope. He confirmed this object on other 3 frames taken on the same night. The object was not shown on a frame taken on 2018 Mar 17.5107 UT (limiting mag 15.4).
2018 03 24.79 UT
USNO-B1.0 0687-0122255 (07 13 45.83 -21 12 27.3, R= 19.6 mag; G= 20.21 mag in Gaia DR1) is 5.4" away, the nearest Pan-STARRS1 source (07 13 45.84 -21 12 31.3, g= 21.55 mag) is 1.9" away from the transient's position. No previous outbursts or eruptions were recorded by the ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) in 2012 February and since 2014 December; latest available observation: 2018 March 23.153 UT, V= 15.5 mag (contaminated by a 15 mag star
9" away): https://asas-sn.osu.edu/light_curves/b38524a4-4dff-49e8-af69-18d14ce740…
--- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
2018 03 24.831 UT
Visual magnitude estimate by P. Schmeer, Bischmisheim, Germany:
2018 Mar. 24.831 UT, 12.8 (203-mm Schmidt-Cassegrain telescope).
Follow-up reports: http://www.cbat.eps.harvard.edu/unconf/followups/J07134590-2112330.html
Spectroscopy, time-resolved photometry, and precise astrometry are urgently required.
Clear skies,
Patrick
V 12.113,err 0..012
B 12.916, err 0.026
2018/03/25 02:19 UT
Jay Strader, Laura Chomiuk, Arash Bahramian, Sam Swihart (Michigan State):
"Spectroscopic Confirmation of TCP J07134590-2112330 as a Galactic Classical Nova in Canis Major" (ATel #11475)
http://www.astronomerstelegram.org/?read=11475
Possibly still brightening. I measured it at 11.964V +/-0.008 on 3-26 at 01:17:23UT. BVRI data submitted. Transparency very good, seeing poor. Quite low for me at +44.2.
Clear skies,
Brad Vietje
Newbury, VT
www.nkaf.org
AAVSO Alert Notice 627 announces and reports on Nova CMa 2018. Please see the notice for details and observing recommendations.
Many thanks, and Good observing,
Elizabeth Waagen, AAVSO HQ
Contnuing to brighten. 11.480 +/- 0.004 V tonight. BVRI data has been submitted.
Brad Vietje, VBPA
Newbury, VT
www.nkaf.org
I just got 11.446 +/-0.011 V, 12.216 +/-0.015 B @ 2458204.624
This classical nova continues to brighten, but may now be peaking. Last night's measure was 10.279 +/- 0.007 (V), and 11.051 +/- 0.012 (B).
This target is too far south for me to follow much longer as the nights get shorter, but its now well within reach of observers with small instruments and aside from a crowded field, a great target for low-resolution spectroscopy.
Clear skies,
Brad Vietje, VBPA
Newbury, VT
www.nkaf.org