Johnson and SDSS photometry of SN2021wuf (ATLAS21bgsc)
ATel #14921; J. Vannini (Asociacion Nicaraguense de Astronomos Aficionados), J. Ricra (Observatorio AFARI) and N. O. Baella (Instituto Geofisico del Peru)
on 16 Sep 2021; 05:34 UT
Credential Certification: Nobar Baella (nbaella@igp.gob.pe)
Subjects: Optical, Supernovae
We report standard photometric measurements of SN2021wuf (ATLAS21bgsc) obtained ~14d after its discovery and very close to its maximum brightness (see ObSN database). SN2021wuf was discovered on August 23, 2021 by Srivastav et al. 2021 and Tonry et al. 2021, and it would be associated with the galaxies NGC 6500 or 6501 (both at z = 0.01). It has been classified as a Type Ia supernova by Huber et al. 2021 (TNS Classification Report No 10585).
The images were obtained on September 6, 2021 from the Teide Observatory, Canarias (Spain) using a LCOGT 0.4m robotic telescope, a CCD SBIG STL-6303E camera and Johnson (V and B) and SDSS (r' and i') filters. A total of 32 images were obtained (8 in each filter) with exposure times of 300s (B), 100s (r') and 200s (V and i'), under an airmass range of 1.02 to 1.38. The equations described by Harris et al. 1981 and APASS DR10 catalog (Henden et al. 2018) were used for the photometric calibration process.
Table 1 shows the values obtained (without reddening correction), in addition an image of the observed field can be seen here.
This work makes use of observations from the Las Cumbres Observatory global telescope network.
Table 1
| DATE-OBS (UT) |
HJD |
Filter |
Mag |
| 2021-09-06T21:40:52 |
2459464.40447 |
V |
14.01+/-0.07 |
| 2021-09-06T21:45:24 |
2459464.40762 |
B |
14.23+/-0.04 |
| 2021-09-06T21:49:04 |
2459464.41016 |
r' |
14.0+/-0.2 |
| 2021-09-06T21:51:54 |
2459464.41213 |
i' |
15.3+/-0.2 |
