------- --------------- ------------------------ ---------------------------------------------- ---------------------
   56360   sw00030376021   $2.05_{-0.04}^{+0.04}$              $4.89_{-0.06}^{+0.06}$                   1.23 (48)
   56366   sw00030376022   $1.94_{-0.04}^{+0.04}$              $6.49_{-0.09}^{+0.08}$                   0.90 (51)
   56369   sw00030376023   $2.11_{-0.03}^{+0.04}$              $5.84_{-0.06}^{+0.06}$                   0.80 (64)
   56387   sw00030376024   $2.23_{-0.05}^{+0.05}$              $4.03_{-0.06}^{+0.06}$                   0.93 (43)
   56390   sw00030376025   $2.13_{-0.04}^{+0.05}$              $4.42_{-0.06}^{+0.06}$                   1.43 (46)
   56396   sw00030376026   $2.23_{-0.04}^{+0.04}$              $4.31_{-0.05}^{+0.05}$                   1.38 (58)

  : Spectral analysis of *Swift*-XRT data during March 1, 2013 to April 15, 2013 using power law spectrum with neutral hydrogen density fixed at 1.99$\times10^{20}$ $cm^{-2}$.[]{data-label="Table:XRT"}

    MJD        [V]{}            [B]{}            [U]{}            [W1]{}           [M2]{}           [W2]{}
  ------- ---------------- ---------------- ---------------- ---------------- ---------------- ----------------
   56360   16.15$\pm$0.08   16.78$\pm$0.06   15.86$\pm$0.05   15.85$\pm$0.05   15.59$\pm$0.04   15.83$\pm$0.03
   56366   16.43$\pm$0.01   16.98$\pm$0.07   15.96$\pm$0.05   16.06$\pm$0.05   16.30$\pm$0.07   16.24$\pm$0.04
   56369   16.27$\pm$0.08   16.87$\pm$0.06   16.01$\pm$0.05   15.91$\pm$0.05   15.79$\pm$0.05   15.80$\pm$0.03
   56387   16.30$\pm$0.08   16.76$\pm$0.06   15.95$\pm$0.05   15.85$\pm$0.05   15.79$\pm$0.05   15.87$\pm$0.04
   56390   16.17$\pm$0.08   16.86$\pm$0.06   16.10$\pm$0.05   15.89$\pm$0.05   15.76$\pm$0.05   15.84$\pm$0.04
   56396   16.21$\pm$0.07   16.79$\pm$0.05   15.82$\pm$0.04   15.76$\pm$0.04   15.72$\pm$0.04   15.88$\pm$0.03

  : Summary of *Swift*-UVOT observed magnitudes during March 1, 2013 to April 15, 2013 in six filters.[]{data-label="Table:UVOT"}

OVRO data
---------

The $OVRO$ (Owens Valley Radio Observatory) is a fast cadence 15 GHz radio telescope with diameter of 40 m [@ovro11]. The telescope is a f/0.4 type parabolic reflector on an alt-azm mounting system and is equipped with dual beamed off axis optics and a cooled receiver installed at prime focus. The source 1ES 1218+304 was observed at 