Open Access

Table A.1.

Detection of AT 2023txn on DASCH digitization of Harvard historical photographic plates.

HJD date mag err lim.mag.
2417513.552926 1906.827542 nd 10.69
2417521.559040 1906.849477 12.40 0.28 14.68
2417523.488225 1906.854762 nd 10.42
2421538.474353 1917.846505 nd 10.18
2421540.513781 1917.852093 12.35 0.46 12.43
2421552.476295 1917.884867 nd 12.84
2423647.705041 1923.622480 nd 11.30
2423648.635267 1923.625028 12.08 0.69 12.50
2423649.699234 1923.627943 nd 12.10
2426128.797801 1930.414515 nd 10.76
2426151.804183 1930.477546 12.40 1.25 12.47
2426163.724743 1930.510205 nd 11.12
2429105.636855 1938.564759 nd 13.03
2429105.667248 1938.564842 13.92 0.31 14.45
2429107.634164 1938.570231 nd 11.81
2432803.548437 1948.688657 nd 13.79
2432822.515574 1948.740480 13.58 0.24 16.25
2433044.815646 1949.348810 nd 14.39
2434248.681709 1952.645305 nd 12.53
2434248.745740 1952.645480 14.41 0.10 14.89
2434250.595142 1952.650533 14.52 0.14 14.62
2434290.512226 1952.759596 14.72 0.15 14.93
2434678.612500 1953.822226 nd 12.25
2442684.536111 1975.742565 nd 11.56
2442713.487089 1975.821882 12.68 0.14 14.67
2442902.798160 1976.339612 nd 14.23
2442982.675168 1976.557856 nd 15.11
2442992.697121 1976.585238 13.68 0.14 14.87
2442993.672824 1976.587904 nd 14.88
2446769.492361 1986.926006 nd 13.94
2446915.780265 1987.326795 12.11 0.42 13.14
2446946.821528 1987.411840 nd 12.70
2447242.893403 1988.222386 nd 13.86
2447270.809831 1988.298661 13.79 0.25 14.27
2447330.761806 1988.462464 nd 13.55

Notes. In the third column "nd" stands for "not detected".

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