Affiliation
Nucleo de Estudo e Observacao Astronomica - Jose Brazilicio de Souza (Florianopolis, Brazil) (NEOA-JBS)
Mon, 03/11/2024 - 11:11
Dear friends,
This object is located at:
RA = 17 39 57.20 Dec = -26 27 41.0 (J2000.0)
I observed in 2024 March 11.2486 UT and estimated visually at magnitude 10.3 using comps 97 and 103 from Tycho-2.
More information: http://www.cbat.eps.harvard.edu/unconf/followups/J17395720-2627410.html
with regards,
AAX
CBET 5365 announces this event, now designated V4370 Oph. Picking through the details on the CBET, I compiled the following chronological list of more-or-less independent reports:
March UT
9.81 Yamamoto, Japan 180mm (not vis)
10.772 Pearce, Aus 85mm f/1.2
10.775 Kojima, Japan 200mm f/3.2 <--- earliest reported
10.797 Nakmura, Japan 135mm
10.807 Yamamoto, Japan 180mm
10.818 Itagaki, Japan no spec
10.825 Fujikawa, Japan 120mm
10.84 Uemura, Japan 1.5-m, spectrum
10.846 Itagaki, Japan 35cm follow-up
10.852 Takao, Japan 400mm
11.107 Korotkiy, Russia? 135mm f/2
So the object was not present on March 9.81 (below mag 15) from Japan, and one day later it was picked up by numerous observers in Japan and Australia at nearly the same time, and one of these happened to report it sightly ahead of everyone else. A spectrum was obtained the same morning. There is obviously a lot of competition to find these novae around the galactic center. But what happened in between? It is also obvious that there is some 'discovery space' here at intervening longitudes, such as in the US or South Africa (say). Another thought is one could observe at far-red wavelegnths (Cousins I or Sloan z) to pick up greatly reddened novae that others are missing altogether.
I hope the field of T CrB is being observed as intensively, so that we'll know within the hour when it starts up.
\Brian
It doesn't seem very easy to me to report interesting and time critical activity.
The suggested routes on AAVSO page are pretty cryptic (to me). I doubt I could figure it out in an hour.
The Central Bureau for Astronomical Telegrams suggests a second observation on another night.
Is there an alternative?
I have never used it, but the good procedure that I have had since 2016, I believe, is through TNS (https://www.wis-tns.org/). A free account must be opened and the observation can be reported using an online form.
This account is also used for research.
JBD
I have never used it (for now), but the good procedure that I have had since 2016, I believe, is through TNS (https://www.wis-tns.org/). A free account must be opened and the observation can be reported using an online form.
This account is also used for research.
JBD
I observed in…
Dear friends,
I observed in 2024 March 12.2895 UT and estimated visually at magnitude 12.0: using red comps 117 and 120 from Tycho-2.
AAVSO Alert Notice 856 reports on V4370 Oph = N Oph 2024. Please see the notice for details and observing instructions.
There are threads for this nova under the following AAVSO forums:
- Time Sensitive Alerts: https://www.aavso.org/n-oph-2024-v-4370-oph-tcp-j-17395720-2627410
- Novae: https://www.aavso.org/node/90814
Please subscribe to these threads if you are observing the nova so you can be updated. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ