Using the nexsciTAP Server with the PyVO Client to Access KPF Data At KOA In Synchronous Mode

The nexsciTAP server

The NASA Exoplanet Science Institute (NExScI) (visit https://nexsci.caltech.edu) has developed a Python-based server to implement an API that complies with the Virtual Observatory (VO) Table Access Protocol(TAP) version 1.1 (September 2019) (http://ivoa.net/documents/TAP/20190927/index.html), a standard recommended by the International Virtual Observatory alliance (IVOA) (http://ivoa.net).

The TAP API enables a rich variety of searches against tabular data, includung cone, box or all-sky searches, temporal searches, combinations of spatial searches and temporal searches, searches against instrumental attributes and program attributes.

This tutorial supports demonstrates how to use the PyVO client to perform ssynchronous TAP-based queries for public raw science and calibation data acquired with the Keck Planet Finder (KPF) these data are hosted at the Keck Observatory Archive (KOA; https://koa.ipac.caltech.edu).

KPF entered shared-risk usage at the W. M. Keck Observatory in February 2023. Calibration data are immediately made public, and are accessible anonymously through PyKOA. Science data are protected and accessible only by PIs until August 202

Only calibration data are public as May 2023, and the queries shown here will return only calibration files until science data are released no earlier than November 2023 (approximately).

The number of records returned by each query may differ from the number returned in this Notebook because new data are made public daily

Requirements

This tutorial uses PyVO version 1.1.1, and can be installed from PyPI:

$ pip install --upgrade PyVO

The tutorial requires Python 3.6 (or later), plus the table read and write functions from Astropy. We have tested with Astropy 4.0.1, but any version should work. We recommend using the Ananconda Python distribution.

A note on output records

The number of records returned here may differ from those returned here because new data are released daily.

Version 1.0 (June 2023)