( ( The ( spectral ( fitting results ) ) ) ( ( indicate ( that ( ( the ( black ( body temperature ) ) ) ( remains ( constant ( within ( ( the errors ) ( for ( the ( 4 ( phase intervals ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ spectral) (JJ fitting) (NNS results)) (VP (VBP indicate) (SBAR (IN that) (S (NP (DT the) (JJ black) (NN body) (NN temperature)) (VP (VBZ remains) (ADJP (JJ constant) (PP (IN within) (NP (NP (DT the) (NNS errors)) (PP (IN for) (NP (DT the) (CD 4) (NN phase) (NNS intervals)))))))))) (. .)))
The spectral fitting results indicate that the black body temperature remains constant within the errors for the 4 phase intervals.
(ROOT (S (PP (IN During) (NP (NN phase) (NN change))) (, ,) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (DT a) (NN system)))) (VP (VBZ remains) (ADJP (JJ constant))) (. .)))