Open Access
Table A.5.
Information on the ZTF stacked images and photometry of the pre-outburst source at the location of AT 2021blu.
| Initial date | Initial MJD | Final date | Final MJD | Average MJD | Filter | magnitude | CCD code |
|---|---|---|---|---|---|---|---|
| 2018-04-25 | 58233.22 | 2018-06-23 | 58292.20 | 58260.72 | g | > 21.98 | ZTF-c12 |
| 2018-03-25 | 58202.26 | 2018-06-24 | 58293.18 | 58248.47 | g | > 21.85 | ZTF-c09 |
| 2018-10-31 | 58422.50 | 2019-06-28 | 58662.21 | 58520.01 | g | 22.20 (0.54) | ZTF-c09 |
| 2019-10-09 | 58765.51 | 2019-12-29 | 58846.52 | 58802.75 | g | > 22.17 | ZTF-c12 |
| 2019-10-02 | 58758.51 | 2019-12-29 | 58846.51 | 58790.41 | g | > 21.74 | ZTF-c09 |
| 2020-01-04 | 58852.52 | 2020-01-29 | 58877.38 | 58865.24 | g | 22.10 (0.46) | ZTF-c12 |
| 2020-01-01 | 58849.48 | 2020-01-31 | 58879.27 | 58869.97 | g | 22.04 (0.36) | ZTF-c09 |
| 2020-02-01 | 58880.42 | 2020-02-27 | 58906.29 | 58891.04 | g | > 22.09 | ZTF-c09 |
| 2020-02-01 | 58880.42 | 2020-02-27 | 58906.31 | 58895.65 | g | > 22.00 | ZTF-c12 |
| 2020-03-01 | 58909.28 | 2020-03-28 | 58936.27 | 58916.00 | g | > 21.55 | ZTF-c12 |
| 2020-03-04 | 58912.26 | 2020-03-31 | 58939.31 | 58925.76 | g | > 21.60 | ZTF-c09 |
| 2020-04-15 | 58954.17 | 2020-04-29 | 58968.24 | 58962.46 | g | 22.04 (0.42) | ZTF-c09 |
| 2020-04-15 | 58954.28 | 2020-04-29 | 58968.27 | 58963.53 | g | 22.07 (0.33) | ZTF-c12 |
| 2020-05-02 | 58971.25 | 2020-05-29 | 58998.18 | 58983.74 | g | > 21.90 | ZTF-c12 |
| 2020-05-03 | 58972.23 | 2020-06-05 | 59005.17 | 58987.19 | g | > 21.84 | ZTF-c09 |
| 2020-06-01 | 59001.17 | 2020-06-27 | 59027.20 | 59016.53 | g | > 21.69 | ZTF-c12 |
| 2020-10-18 | 59140.51 | 2020-11-05 | 59158.48 | 59149.21 | g | > 21.46 | ZTF-c09 |
| 2020-10-18 | 59140.51 | 2020-11-06 | 59159.52 | 59150.39 | g | > 21.74 | ZTF-c12 |
| 2020-11-12 | 59165.53 | 2020-11-29 | 59182.56 | 59174.27 | g | 21.83 (0.49) | ZTF-c09 |
| 2020-11-12 | 59165.52 | 2020-12-01 | 59184.45 | 59175.00 | g | 21.83 (0.50) | ZTF-c12 |
| 2020-12-02 | 59185.51 | 2020-12-22 | 59205.43 | 59196.32 | g | 21.62 (0.66) | ZTF-c09 |
| 2020-12-05 | 59188.47 | 2020-12-22 | 59205.43 | 59198.29 | g | 21.72 (0.46) | ZTF-c12 |
| 2021-01-01 | 59215.49 | 2021-01-17 | 59231.42 | 59222.69 | g | 21.64 (0.48) | ZTF-c12 |
| 2021-01-08 | 59222.39 | 2021-01-18 | 59232.43 | 59227.44 | g | 21.60 (0.32) | ZTF-c09 |
| 2018-04-08 | 58216.22 | 2018-06-15 | 58284.18 | 58243.86 | r | 21.62 (0.51) | ZTF-c09 |
| 2018-04-06 | 58214.20 | 2018-06-15 | 58284.17 | 53245.90 | r | 21.74 (0.46) | ZTF-c12 |
| 2018-11-07 | 58429.52 | 2019-06-24 | 58658.18 | 58524.29 | r | > 21.72 | ZTF-c12 |
| 2018-10-31 | 58422.53 | 2019-07-05 | 58669.18 | 58509.83 | r | 21.75 (0.54) | ZTF-c09 |
| 2019-09-25 | 58751.53 | 2019-12-29 | 58846.46 | 58800.39 | r | > 21.58 | ZTF-c09 |
| 2019-10-20 | 58776.51 | 2019-12-29 | 58846.46 | 58812.89 | r | > 21.61 | ZTF-c12 |
| 2020-01-01 | 58849.45 | 2020-01-29 | 58877.34 | 58861.95 | r | > 21.40 | ZTF-c12 |
| 2020-01-01 | 58849.44 | 2020-01-31 | 58879.34 | 58867.73 | r | 21.74 (0.36) | ZTF-c12 |
| 2020-02-01 | 58880.32 | 2020-02-27 | 58906.23 | 58890.86 | r | 21.75 (0.50) | ZTF-c09 |
| 2020-02-01 | 58880.34 | 2020-02-20 | 58899.34 | 58891.63 | r | 21.71 (0.47) | ZTF-c12 |
| 2020-03-01 | 58909.32 | 2020-03-31 | 58939.21 | 58916.04 | r | > 21.68 | ZTF-c12 |
| 2020-04-15 | 58954.24 | 2020-04-29 | 58968.19 | 58961.56 | r | 21.82 (0.33) | ZTF-c12 |
| 2020-04-15 | 58954.22 | 2020-04-29 | 58968.17 | 58962.46 | r | 21.83 (0.33) | ZTF-c09 |
| 2020-05-01 | 58970.21 | 2020-05-29 | 58998.25 | 58981.72 | r | 21.91 (0.42) | ZTF-c12 |
| 2020-05-03 | 58972.17 | 2020-06-27 | 59027.18 | 58990.65 | r | 21.93 (0.52) | ZTF-c09 |
| 2020-06-04 | 59004.25 | 2020-06-27 | 59027.17 | 59017.06 | r | > 21.34 | ZTF-c12 |
| 2020-10-14 | 59136.52 | 2020-11-05 | 59158.53 | 59147.65 | r | 21.74 (0.53) | ZTF-c09 |
| 2020-10-18 | 59140.53 | 2020-11-06 | 59159.49 | 59149.61 | r | 21.61 (0.47) | ZTF-c12 |
| 2020-11-12 | 59165.49 | 2020-11-28 | 59181.49 | 59172.69 | r | 21.48 (0.39) | ZTF-c12 |
| 2020-11-12 | 59165.49 | 2020-12-02 | 59185.47 | 59174.79 | r | 21.26 (0.31) | ZTF-c09 |
| 2020-12-01 | 59184.51 | 2020-12-17 | 59200.52 | 59193.48 | r | 21.30 (0.38) | ZTF-c12 |
| 2020-12-10 | 59193.52 | 2020-12-27 | 59210.43 | 59200.32 | r | 21.29 (0.29) | ZTF-c09 |
| 2021-01-04 | 59218.45 | 2021-01-04 | 59218.45 | 59218.45 | r | 21.32 (0.30) | ZTF-c09 |
| 2021-01-01 | 59215.44 | 2021-01-05 | 59219.36 | 59219.42 | r | 21.32 (0.42) | ZTF-c12 |
| 2021-01-01 | 59215.44 | 2021-01-17 | 59231.47 | 59222.68 | r | 21.29 (0.37) | ZTF-c12 |
| 2021-01-07 | 59221.40 | 2021-01-11 | 59225.41 | 59223.43 | r | 21.31 (0.30) | ZTF-c12 |
| 2021-01-08 | 59222.44 | 2021-01-12 | 59226.49 | 59224.47 | r | 21.34 (0.26) | ZTF-c09 |
| 2021-01-13 | 59227.40 | 2021-01-17 | 59231.47 | 59229.43 | r | 21.36 (0.34) | ZTF-c12 |
| 2021-01-14 | 59228.47 | 2021-01-18 | 59232.42 | 59230.45 | r | 21.35 (0.28) | ZTF-c09 |
| 2018-04-24 | 58232.30 | 2018-05-28 | 58266.22 | 58251.60 | i | > 20.98 | ZTF-c12 |
| 2018-04-24 | 58232.30 | 2018-05-28 | 58266.22 | 58251.97 | i | > 21.06 | ZTF-c09 |
Notes. The table reports the epoch and MJD of the first image (Columns 1 and 2), the epoch and MJD of the last image (Columns 3 and 4), the average MJD of the stacked image (Column 5), the filter (Column 6), the magnitude (Column 7), and the CCD chip identification code of the ZTF images (Column 8).
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