00:00:07:47 - 00:00:08:24 This video 00:00:08:24 - 00:00:11:15 is the first in a series of videos on CubeViz. 00:00:11:35 - 00:00:16:26 We will demonstrate how to open integral field unit if you data in CubeViz. 00:00:17:15 - 00:00:21:59 For this example, we use real observations of an active galactic nucleus 00:00:22:17 - 00:00:27:09 obtained with the near Infrared Field Spectrograph NIFS on Keck.
00:00:27:53 - 00:00:31:46 We use this data set instead of JWST simulations 00:00:32:10 - 00:00:36:09 because it best highlights a useful science case and is very similar 00:00:36:09 - 00:00:40:31 to the expected data format from the JWST near spec instrument. 00:00:40:47 - 00:00:44:48 Our science goal is to perform a background estimation and subtraction 00:00:45:08 - 00:00:48:26 in each spaxel of the cube to ultimately analyze 00:00:48:26 - 00:00:51:45 spectral lines of interest free of background contamination. 00:00:52:21 - 00:00:54:56 We will run this Jupyter Notebook in Jupyter Lab 00:00:55:14 - 00:00:59:07 which provides some increased flexibility, specifically the ability 00:00:59:07 - 00:01:03:15 to open the tool in the sidecar on the right hand side.
The ability 00:01:03:15 - 00:01:07:39 to easily switch between the tool and the notebook highlights the power of CubeViz. 00:01:07:39 - 00:01:08:05 00:01:09:56 - 00:01:12:38 The first thing we must do is import our Python packages. 00:01:13:17 - 00:01:16:01 Next, we open CubeViz and load the data set.
00:01:18:25 - 00:01:20:31 The window can be stretched as necessary. 00:01:23:56 - 00:01:25:18 The default windows in CubeViz 00:01:25:18 - 00:01:29:51 include a flux viewer in the upper left an error viewer in the center 00:01:30:13 - 00:01:32:40 and a D Q Flag Viewer in the upper right. 00:01:34:10 - 00:01:35:53 At the bottom is a spectral viewer 00:01:35:53 - 00:01:38:58 to view collapsed spectra from the cube.
00:01:38:58 - 00:01:42:42 The first thing we can do is open the plot options in the plugin toolbar. 00:01:43:11 - 00:01:45:42 The plugin toolbar offers many possible options 00:01:45:42 - 00:01:48:38 for interacting with the data 00:01:49:13 - 00:01:50:15 in the plot options, 00:01:50:15 - 00:01:54:05 We can manipulate settings such as the color map, scale, stretch, 00:01:54:11 - 00:01:58:01 contrast, and even contours. 00:01:58:05 - 00:01:59:29 For this example, 00:01:59:29 - 00:02:04:13 we will change the stretch to square root and the percentage to 95%.
00:02:06:06 - 00:02:08:37 Next, we scrub through the data cube 00:02:08:37 - 00:02:12:27 by grabbing the wavelength slice indicator and dragging it back and forth. 00:02:13:39 - 00:02:16:25 We see the data cube changing. 00:02:16:25 - 00:02:20:02 In particular, we see different features appear at different wavelengths.
00:02:21:05 - 00:02:23:48 Physically, these correspond to red shifted and blue 00:02:23:48 - 00:02:26:28 shifted outflows from the AGN nucleus. 00:02:27:58 - 00:02:31:00 In our next video, we will demonstrate how to interact 00:02:31:00 - 00:02:34:55 with the data using the tool by drawing spatial and spectral regions.
