Open Access
Table A.2.
Parameters of black-body fit to the uBgcVroizyYJHK bands of AT 2021biy. Uncertainties are given in parentheses.
| Date | MJD | Phasea | Luminosity | Temperature | Radius |
|---|---|---|---|---|---|
| (days) | (1040 erg s−1) | (K) | (1014 cm) | ||
| 20210131 | 59245.10 | −5.9 | 4.97 (2.17) | 9450 (590) | 0.94 (0.20) |
| 20210202 | 59247.17 | −3.8 | 9.78 (4.03) | 9615 (565) | 1.27 (0.26) |
| 20210203 | 59248.20 | −2.8 | 11.50 (4.53) | 10080 (565) | 1.25 (0.25) |
| 20210205 | 59250.45 | −0.6 | 15.91 (13.04) | 11430 (1410) | 1.14 (0.47) |
| 20210210 | 59255.09 | +4.1 | 12.54 (8.91) | 10305 (1055) | 1.25 (0.44) |
| 20210216 | 59261.12 | +10.1 | 7.66 (1.80) | 9190 (260) | 1.23 (0.14) |
| 20210219 | 59264.80 | +13.8 | 5.78 (1.81) | 8685 (395) | 1.19 (0.19) |
| 20210227 | 59272.11 | +21.1 | 3.21 (0.92) | 6630 (225) | 1.53 (0.28) |
| 20210303 | 59276.08 | +25.1 | 2.49 (0.88) | 5980 (255) | 1.65 (0.29) |
| 20210313 | 59285.99 | +35.0 | 2.16 (0.59) | 5255 (145) | 1.99 (0.27) |
| 20210319 | 59292.05 | +41.0 | 2.02 (0.62) | 4950 (155) | 2.17 (0.33) |
| 20210327 | 59300.43 | +49.4 | 2.06 (0.76) | 4495 (170) | 2.66 (0.49) |
| 20210403 | 59307.98 | +57.0 | 1.86 (0.48) | 4780 (140) | 2.24 (0.29) |
| 20210414 | 59318.99 | +68.0 | 2.32 (1.16) | 4585 (250) | 2.71 (0.68) |
| 20210429 | 59333.10 | +82.1 | 2.76 (0.66) | 4655 (115) | 2.87 (0.34) |
| 20210508 | 59342.01 | +91.0 | 3.48 (2.00) | 4630 (280) | 3.26 (0.92) |
| 20210519 | 59353.91 | +102.9 | 4.41 (1.43) | 4555 (155) | 3.79 (0.61) |
| 20210530 | 59364.98 | +114.0 | 4.94 (2.06) | 4325 (190) | 4.45 (0.93) |
| 20210616 | 59381.93 | +130.9 | 5.07 (1.78) | 4145 (145) | 4.91 (0.86) |
| 20210626 | 59391.22 | +140.2 | 4.67 (1.19) | 4340 (155) | 4.05 (0.52) |
| 20210709 | 59404.89 | +153.9 | 4.96 (1.19) | 4355 (100) | 4.40 (0.53) |
| 20210725 | 59420.85 | +169.8 | 4.43 (0.91) | 4340 (80) | 4.18 (0.43) |
| 20210808 | 59434.88 | +183.9 | 4.18 (0.89) | 4400 (95) | 3.96 (0.42) |
| 20210820 | 59446.89 | +195.9 | 3.97 (0.85) | 4360 (95) | 3.92 (0.42) |
| 20210911 | 59468.78 | +217.8 | 4.17 (0.82) | 4230 (75) | 4.27 (0.42) |
| 20211105 | 59523.16 | +272.2 | 4.50 (1.10) | 4090 (90) | 4.74 (0.58) |
| 20211202 | 59550.48 | +299.5 | 4.31 (0.88) | 4185 (75) | 4.44 (0.45) |
| 20211218 | 59566.18 | +315.2 | 3.87 (0.84) | 4055 (80) | 4.48 (0.49) |
| 20211225 | 59573.17 | +322.2 | 3.04 (0.86) | 3590 (100) | 5.07 (0.71) |
| 20220102 | 59581.19 | +330.2 | 1.93 (0.71) | 3090 (105) | 5.44 (1.00) |
| 20220113 | 59592.11 | +341.1 | 1.88 (1.23) | 2825 (165) | 6.44 (2.11) |
| 20220123 | 59602.26 | +351.3 | 1.89 (0.56) | 3030 (80) | 5.62 (0.83) |
| 20220204 | 59614.18 | +363.2 | 2.26 (0.53) | 3140 (65) | 5.71 (0.67) |
| 20220212 | 59622.37 | +371.4 | 2.18 (0.45) | 3170 (50) | 5.50 (0.56) |
| 20220214 | 59624.02 | +373.0 | 2.16 (0.48) | 3105 (55) | 5.71 (0.64) |
| 20220228 | 59638.23 | +387.2 | 1.91 (0.45) | 2815 (55) | 6.53 (0.78) |
| 20220409 | 59678.90 | +427.9 | 1.11 (0.58) | 2055 (95) | 9.35 (2.43) |
| 20220414 | 59683.98 | +433.0 | 0.87 (0.47) | 2380 (140) | 6.16 (1.66) |
| 20220424 | 59693.93 | +442.9 | 0.98 (0.38) | 2330 (90) | 6.83 (1.31) |
| 20220518 | 59717.94 | +466.9 | 0.85 (0.41) | 2300 (110) | 6.54 (1.58) |
aPhases are relative to r-band maximum brightness (MJD = 59251.0 ± 1.0).
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