Teacher:In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Teacher: Now, understand the problem? Solve this instance: The line-of-sight integral of electron column density to one of these objects is their "dispersion measure," and so-called "timing experiments" done with these objects are employed to detect the Gravitational Wave Background. One of these objects was the first known star save the Sun to possess planets. Turbulence in the interstellar medium is commonly probed using the radiation from these objects. One class of these objects is thought to originate from two mechanisms, one of which is the "spin-up" of low-mass X-ray binaries, the "millisecond" variety. Another class of them rotates due to the decay of a powerful B-field. Starquakes are thought to cause glitches in the periods of these objects. For 10 points, name this class of neutron stars that emits electromagnetic radiation.
Student:
Science