in the field strength where one half shows field strength of 650 G whereas another half of 120 G. As estimates are made over only LOS magnetic field, such sharp gradient may indicate that these regions are possibly located in the opposite polarity regions. The vertical dashed lines represent the IRIS spectroscopic slit that passes above the ARTB A.

Data Analysis and Results {#sec:analysis}
=========================

Imaging Analysis {#sec:imaging}
----------------

![image](fig5.eps){width="90.00000%"}

![image](fig6.eps){width="80.00000%"}

The two ARTBs namely A and B having compact sizes of about $2\arcsec \times 2\arcsec$ started at $\approx$13:03:11 UT and peaked at around 13:03:45 UT. Both A and B were recorded in all the AIA and IRIS-SJI passbands. Figure \[fig:aia\_img\] displays the two ARTBs at their peak recorded in AIA passbands. The ARTBs are also observed by XRT using Be-thin filter as shown in the top right panel of Figure \[fig:context\_loc\]. The two channels of AIA namely 131 [Å]{}, and 94 [Å]{} are sensitive to hot plasma representing 128.75 [Å]{} and 93.93 [Å]{} respectively. However, both of these channels have strong contributions from cooler temperatures . Fortunately, emission due to hot plasma corresponding to  93.93 [Å]{} spectral line from 94 [Å]{} channel images can be separated from cool emission 