Useful tools/links for observations

1. Object visibility

• Object Visibility:
  https://astro.ing.iac.es/staralt/

2. Standard star catalogs

• Subaru Optical Spectrophotometric Standard Stars: https://subarutelescope.org/Observing/Instruments/FOCAS/Detail/UsersGuide/Observing/StandardStar/Spec/SpecStandard.html

• List of standard star catalogs:
  https://www.eso.org/sci/observing/tools/standards.html

• RA Ordered List of Spectrophotometric Standards:
  https://www.eso.org/sci/observing/tools/standards/spectra/stanlis.html

3. Finding charts, image viewers, and cutout services

• DESI Legacy Survey Viewer:
  https://www.legacysurvey.org/viewer/

• ESA Sky:
  https://sky.esa.int/esasky/

• SDSS Finding Chart Tool:
  DR18: https://skyserver.sdss.org/dr18/en/tools/chart/chartinfo.aspx
  DR16: http://skyserver.sdss.org/dr16/en/tools/chart/chartinfo.aspx

• PanSTARRS-1 Image Access:
  http://ps1images.stsci.edu/cgi-bin/ps1cutouts

• Python API for getting image from the PS1 image server:
  https://ps1images.stsci.edu/ps1image.html

• panstamps – A python package and command-line tools to download stacked and/or warp image stamps from the STScI PanSTARRS image server.
  https://panstamps.readthedocs.io/en/latest/index.html
  https://github.com/thespacedoctor/panstamps

• IRSA Finder Chart Service:
  https://irsa.ipac.caltech.edu/applications/finderchart/

• unWISE coadds:
  https://unwise.me/imgsearch/