A new auroral phenomenon: The anti-black aurora
<|begin_of_text|><|start_header_id|>system<|end_header_id|> You are a research archivist expert in dataset metadata. Answer the question truthfully.  <|eot_id|><|start_header_id|>user<|end_header_id|> Here is the Description of a dataset. Description:'AbstractBlack auroras are small-scale features embedded in the diffuse background aurora thatshow a significant reduction in optical brightness compared to the surrounding diffuse aurora.We report, for the first time, an even more elusive small-scale optical structure has beenobserved occurring paired with ~10% of black aurora patches. A patch or arc segment ofenhanced luminosity, distinctly brighter than the diffuse background, which we name the anti-black aurora, may appear adjacent to the black aurora. The anti-black aurora always moves inparallel to the black aurora, although it may suddenly switch sides for no apparent reason. Thepaired phenomenon always drifts with the same average speed in an easterly direction. From thefirst dual-wavelength observations of anti-black and black aurora pairs, we show that the ant' . Please return only a json list of at most 3 Keywords corresponding to the Description:.<|eot_id|><|start_header_id|>assistant<|end_header_id|> {"Answer" : ["Aurora"]} <|eot_id|>
 Here is the Description of a dataset. Description:'AbstractBlack auroras are small-scale features embedded in the diffuse background aurora thatshow a significant reduction in optical brightness compared to the surrounding diffuse aurora.We report, for the first time, an even more elusive small-scale optical structure has beenobserved occurring paired with ~10% of black aurora patches. A patch or arc segment ofenhanced luminosity, distinctly brighter than the diffuse background, which we name the anti-black aurora, may appear adjacent to the black aurora. The anti-black aurora always moves inparallel to the black aurora, although it may suddenly switch sides for no apparent reason. Thepaired phenomenon always drifts with the same average speed in an easterly direction. From thefirst dual-wavelength observations of anti-black and black aurora pairs, we show that the ant' . Please return only a json list of at most 3 Keywords corresponding to the Description:.
AbstractBlack auroras are small-scale features embedded in the diffuse background aurora thatshow a significant reduction in optical brightness compared to the surrounding diffuse aurora.We report, for the first time, an even more elusive small-scale optical structure has beenobserved occurring paired with ~10% of black aurora patches. A patch or arc segment ofenhanced luminosity, distinctly brighter than the diffuse background, which we name the anti-black aurora, may appear adjacent to the black aurora. The anti-black aurora always moves inparallel to the black aurora, although it may suddenly switch sides for no apparent reason. Thepaired phenomenon always drifts with the same average speed in an easterly direction. From thefirst dual-wavelength observations of anti-black and black aurora pairs, we show that the ant
Aurora