ner_tags: O O O O O O O O O O O O O O O O O O O O B-Instrument O O O B-Observatory B-Organization O O B-Organization I-Organization O O O O O O B-Organization I-Organization O B-Grant
tokens: We thank the referee for critical comments which helped to improve the paper. This research has made use of the MAXI data provided by RIKEN, JAXA and the MAXI team. We acknowledge financial support by the Polish NCN grant DEC-2012/07/N/ST9/04242.