We carried out optical follow-up of the Type II supernova SN2023ixf in the nearby galaxy M101 with the 1.3m Ruths telescope of the INAF-Brera Astronomical Observatory sited in Merate (Italy) equipped with an SBIG STL-1001E CCD. The observations have been carried out on 2023 May 22 from 21:34:59 UT to 22:23:37 UT (i.e. from JD 2460087.39929 to JD 2460087.43307) with the Johnson-Cousin B,V, R, I filters as part of the Astronomy II classes of the Physics Department of the University of Milan.
The supernova is clearly detected. From a preliminary analysis we measure the following magnitudes:
B = 11.060 +/- 0.003
V = 11.201 +/- 0.002
R = 11.118 +/- 0.001
I = 11.336 +/- 0.002
The photometric calibration has been performed assuming B = 14.699 mag, V = 13.801 mag, R = 13.230 mag for the star located at RA(J2000), Dec(J2000): 14:03:13.67, +54:15:43.4 and I = 11.134 mag for the star located at RA(J2000), Dec(J2000): 14:04:21.68, +54:19:22.4 (star 138 AUID 000-BKD-533 and star 119 AUID 000-BKD-528, respectively, on the AAVSO finder chart sequence X28720DS). We estimate that an additional systematic error of the order of 0.05 - 0.1 mag accounts for the uncertainties in the photometric calibration.
Further observations are planned.
| Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TNS | 2023ixf | 14:03:38.562 | +54:18:41.94 | SN II | 0.000804 | M101 | 14:03:38.562 | +54:18:41.94 | SN II | 0.0008 |
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