RA/DEC (2000)
00:42:58.480 +41:08:11.40
10.743667 +41.1365
Type
---
Redshift
Reporting Group
None
Discovering Data Source
None
Discovery Date
2025-12-28 18:22:08.000
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
18.9
Filter
Clear-
Reporter/s
Flavio Castellani

Light curves

 Other_Other_Clear
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
No Data
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- Other_Other 2025-12-27 17:43:01 - 2025-12-28 18:22:08 2461037.238206 - 2461038.2653704 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
544285 2025-12-28 18:22:08 2461038.2653704 18.9 0.2 19.5 ABMag Clear- Other_Other 3600 CASTELLANI F. 0.40m f/7 Dall-Kirkham
544284 2025-12-27 17:43:01 2461037.238206 19.2 ABMag Clear- Other_Other 2700 CASTELLANI F. [Last non detection] 0.40m f/7 Dall-Kirkham
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
283270 2025-12-28 20:49:00 Flavio Castellani Flavio Castellani et al. 00:42:58.480 +41:08:11.40 2025-12-28 18:22:08.000 18.9 Clear- PNV M31 Flavio Castellani report the discovery by F.Castellani, R.Belligoli and V.Andreoli of a PNV (Mag. 18.9R +-0.20 – GAIA DR3 catalogue) in the host galaxy M31 at Monte Baldo Observatory, Ferrara di Monte Baldo, Verona, Italy (A99), in the course of Italian Supernovae Search Project using a 0.40m f/7 Dall-Kirkham telescope (+ Moravian G4-9000 KAF unfiltered CCD camera)20*180 co-added images. No stellar source was visible at the position of the transient in our past images including reference image dated 2025/12/22 20:58:02 and 2025/12/27 17:43:01. Position of the object is close to AT 2025aeum, identified as a possible eruption of the recurrent nova M31N 1963-09c. The difference of 0.74S East and 1.1" South as well as a careful verification of the position of the transient from the PanStarrs and the images of the reports leads to exclude that it is the same object. 2025TNSTR5196....1C N
Related files
File Comments Last Modified (UT) Modified By
tns_2025ajgh_atrep_283270.jpg Discovery image 2025-12-28 18:22:08 2025-12-28 20:52:29 Flavio Castellani
No Data

Comments