Null Signal for the Cosmic Anisotropy in the Pantheon Supernovae Data
  The cosmological principle assumes that the universe is homogeneous and
isotropic on cosmic scales. There exist many works testing the cosmic
homogeneity and/or the cosmic isotropy of the universe in the literature. In
fact, some observational hints of the cosmic anisotropy have been claimed.
However, we note that the paucity of the data considered in the literature
might be responsible for the `found' cosmic anisotropy. So, it might disappear
in a large enough sample. Very recently, the Pantheon sample consisting of 1048
type Ia supernovae (SNIa) has been released, which is the largest
spectroscopically confirmed SNIa sample to date. In the present work, we test
the cosmic anisotropy in the Pantheon SNIa sample by using three methods, and
hence the results from different methods can be cross-checked. All the results
obtained by using the hemisphere comparison (HC) method, the dipole fitting
(DF) method and HEALPix suggest that no evidence for the cosmic anisotropy is
found in the Pantheon SNIa sample.
