(NEW) ATel 16660: The optical spectrum of the black hole transient SWIFT J1753.5-0127 remains featureless... https://www.astronomerstelegram.org/?read=16660
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(NEW) ATel 16660: The optical spectrum of the black hole transient SWIFT J1753.5-0127 remains featureless... https://www.astronomerstelegram.org/?read=16660