Multicolor Photometry of the Unusual Transient and Likely Slow Nova in M31 AT 2023oom (PNV J00465260+4201428)
ATel #16415; R. Fidrich (HAA/VSS, Budakeszi, Hungary), Tamas Tordai (HAA/VSS, Budapest, Hungary), A. W. Shafter (SDSU)
on 23 Jan 2024; 21:11 UT
Distributed as an Instant Email Notice Novae
Credential Certification: Allen W. Shafter (ashafter@sdsu.edu)
Subjects: Optical, Nova, Transient
The slowly evolving transient source AT 2023oom (PNV J00465260+4201428; Vend51) was discovered in the field of M31 on 2023 Aug 05.377 UT near 20th magnitude.
As pointed out by K. Taguchi, the object, which has been gradually rising in brightness since discovery, is likely a very slow nova in M31.
Over the past month, AT 2023oom has exhibited a relatively rapid rise to a peak brightness near m~17.5 (see the link below for a complete light curve). Here, we present multicolor photometry of AT 2023oom during this recent brightening. Observations were made with the 0.25m Newtonian reflector, Budapest (TRT), the 0.43m CDK reflector (iTelescope.net network), Utah Desert Remote Observatory at Great Basin Desert, Beryl Junction, Utah, USA (T19), and San Diego State University's Mount Laguna Observatory (MLO).
JD-2,460,000 | Mag | eMag | Filter | Telescope
297.4191 18.92 0.10 CV TRT
305.2891 18.66 0.08 CV TRT
307.6424 18.27 0.06 LV T19
309.3893 18.49 0.07 CV TRT
309.7336 18.04 0.07 LV T19
311.3673 18.32 0.07 CV TRT
312.6357 18.09 0.04 R MLO
312.6545 18.55 0.08 B MLO
312.6590 18.19 0.07 V MLO
314.2922 18.21 0.04 CV TRT
315.6266 18.17 0.07 V MLO
315.6334 18.48 0.08 B MLO
315.6425 18.02 0.06 R MLO
316.6080 18.49 0.08 B MLO
316.6120 18.24 0.08 V MLO
316.6159 18.07 0.06 R MLO
318.2855 18.34 0.06 CV TRT
318.6104 18.52 0.13 B MLO
318.6134 18.14 0.11 V MLO
318.6177 18.00 0.09 R MLO
319.2641 18.07 0.04 CV TRT
320.2746 18.04 0.04 CV TRT
322.2505 17.91 0.04 CV TRT
322.6452 18.19 0.07 B MLO
322.6492 17.89 0.06 V MLO
322.6531 17.78 0.05 R MLO
323.2421 17.83 0.04 CV TRT
324.2487 17.62 0.04 CV TRT
324.6247 17.87 0.06 B MLO
324.6287 17.53 0.05 V MLO
324.6327 17.42 0.04 R MLO
326.3050 17.38 0.04 CV TRT
326.6283 17.75 0.06 B MLO
326.6334 17.47 0.05 V MLO
326.6374 17.31 0.04 R MLO
328.6534 17.54 0.05 LV T19
330.3160 17.89 0.06 CV TRT
331.2509 18.18 0.06 CV TRT
333.2632 18.85 0.14 CV TRT
Filter key: B, V, R (Johnson-Cousins); CV and LV refer to Clear (unfiltered) and Luminance filter,
respectively, calibrated using V comparison stars.
Additional observations (both photometric and spectroscopic) of this unusual nova candidate in M31 are strongly encouraged.
Complete light curve
