WISE ARCHIVE READING NOTE
Purpose: Make a repeatable comparison of one infrared field.
Guide: https://yenra.com/wiki/WISE_wide-field_infrared_survey_explorer/
Archive: https://irsa.ipac.caltech.edu/applications/wise/
Search documentation: https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/searching.html

FIRST EXERCISE:
Try M51, verify its resolved position, select AllWISE Atlas and W1-W4.
Use Image contains target; choose arcminutes before entering 20 (1200 arcsec).
Compare the same field one band at a time; preserve result IDs and metadata.
This exercise describes display differences, not calibrated photometry.

Target and resolved coordinates:
Coordinate system/epoch:
Search date and result link:
Release/image set:
Atlas coadd or single exposure:
Field size and units:
Search-region option:
Image IDs by band:
W1 = 3.4 micrometers:
W2 = 4.6 micrometers:
W3 = 12 micrometers:
W4 = 22 micrometers:
Observation date(s) or combined time range:
Display stretch, color assignment and zoom:
Resolution/point response for each product:
Coverage, uncertainty and calibration metadata:
Possible saturation, spikes, persistence or background artifacts:
Repeated-frame or other-band checks:
Visible differences:
Interpretation and remaining ambiguity:

For variability or motion use suitable single exposures and their timestamps.
For a moving object, record its ephemeris and the expected position per frame.
For flux measurements retain FITS data, units, calibration, background method,
aperture/PSF method and uncertainties. A screenshot is a display record only.