APIS - Auroral Planetary Imaging and Spectroscopy

New HST campaign

2026-04-22T04:16:27Z

Release of a novel Saturn campaign, Jun.-Jul. 2025 (STIS, 10 time-tagged long exposures including 5 SrF2 filtered images and 5 long-slit [52x0.5''] spectra using the G140L grating).

- News

Update of the resources page

2025-05-26T06:28:09Z

Update of available graphics.

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CNRS labeling of APIS

2025-02-12T01:46:26Z

Late 2024, the Earth Universe Department of CNRS has confirmed the label of APIS, obtained late 2015, as a National Observation Service in the category of data processing, archiving and diffusion centres (SO5).

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Addition of HST FUV observations of Europa

2024-06-14T12:32:19Z

Release of the STIS/Far-UV observations (only) of Europa obtained during the HST campaign of 2018 : 33 long exposure spectra using the 25x2 arcsec long slit with the G140L grating.

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New Jupiter HST campaigns coordinated with Juno

2024-06-11T10:54:39Z

Release of 4 HST campaigns coordinated with the Juno extended mission between 2021 and 2023 :
– Jupiter, 8 Sep. 2021 (STIS, 1 long-exposure image of the northern hemisphere, each sequenced into 2 sec-long subexposures), executed near Juno perijove 36 and coordinated with Chandra EUV observations.
– Jupiter, Jul. 2021-Sep. 2022 (STIS, 6 long-exposures images of the northern hemisphere, each sequenced into up to 26x100 sec-long subexposures), executed between the Juno perijoves 30 and 36.
– Jupiter, Oct. 2021-Jul. 2023 (STIS, 17 long-exposures images of both hemispheres, each sequenced into up to 26x100 sec-long subexposures), executed while Juno explores the equatorial region inside Ganymede's orbit.
– Jupiter, Nov. 2022-Oct. 2023 (STIS, 11 long-exposures images of both hemispheres, each sequenced into up to 26x100 sec-long subexposures), executed while Juno explores the equatorial region inside Ganymede's orbit.

This represents nearly 1000 individual observations. The high data level (cylindrical and polar projections) have been derived for all the observations.

Addition of two HST campaigns

2023-12-08T08:38:25Z

Release of the data corresponding to two HST campaigns executed in 2020 and 2021 :
– Uranus, Oct.-Dec. 2020 (STIS, 12 long exposure images using the 25MAMA and SrF2 filters).
– Ganymede, Jun. 2021 (STIS, 8 long exposure spectra using the 25x2 arcsec long slit with the G140L grating)

Association of Pythéas/LAM

2023-09-20T04:05:08Z

The Pythéas institute and the Astrophysics laboratory of Marseille have been officially associated to the APIS CNRS/INSU observation service in June 2023. This will enable the CeSAM (Centre de donnéeS Astrophysiques de Marseille) to contribute to the storage and delivery of APIS data products.

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Update of the section 'resources'

2022-03-11T09:43:37Z

Addition of a novel composite image of planetary magnetospheres of the solar system.

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New HST campaigns : Saturn, Io and Jupiter

2022-01-19T09:20:28Z

Release of 4 HST campaigns :
– Saturn, Aug.-Sep. 2017 (STIS, 4 images using the 25MAMA/SrF2 filters and 2 long-slit [52x0.1''] spectra using the G140M grating), executed during the Cassini proximal orbits ;
– Saturn, Oct.-Nov. 2020 (STIS, 13 long-exposures images using the SrF2/QTZ filters), executed during the Jupiter/Saturn conjunction ;
– Io, Dec. 2013-Jan. 2014 (STIS, 20 long-slit [52x2''] spectra using the G140L grating) ;
– Jupiter, Aug.-Sep. 2021 (STIS, 4 long-exposures images, each sequenced into 25x100 sec-long subexposures), executed between the Juno perijoves 28 and 29.

A doi for the APIS/Cassini/UVIS data collection

2022-01-04T08:30:12Z

The APIS/Cassini/UVIS data collection is now referenced as : https://doi.org/10.25935/WZ47-TM17

Best wishes for this new year.

Update of the section 'resources'

2021-12-27T13:02:27Z

Addition of a novel composite image of HST/Far-UV auroral planetary observations of solar system bodies, built up as an illustration for concepts of future, large class, UV telescopes.

- News

A doi for the APIS/HST data collection

2021-12-17T15:45:17Z

In the framework of the open data context, we started to attribute a Digital Objectif Identifier (DOI) to APIS data collections, so that they can be more easily identified and referenced. This process was initiated with the APIS/HST data collection : https://doi.org/10.25935/T184-3B87

The APIS team wishes you an excellent end of year.

Addition of HST observations of Uranus and Neptune

2021-12-08T09:25:33Z

Release of the data corresponding to the HST campaign executed late 2017 which targeted both ice giants :
– Uranus, Sep.-Nov. 2017 (STIS, 4 long-exposure images using the 25MAMA aperture) ;
– Neptune, Oct.-Nov. 2017 (STIS, 8 images using the 25MAMA and SrF2 filters).

Migration of the database tomorrow

2021-04-29T12:32:44Z

Due to regular stability issues encountered with the APIS various databases, these will be migrated on 30 April 2021. The search interface and data access may be shortly unaccessible during this process.

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New HST data coordinated with Cassini's final dive

2021-04-22T09:50:10Z

The long-exposure image acquired by HST/STIS at the expected time of the Cassini plunge into Saturn's atmosphere on 15 Sept. has been added to the HST database.

- News

Update of the search interface

2021-01-14T10:01:10Z

The advanced search interface now enables the user to select the HST/Jupiter data acquired since mid-2016 as a function of the position of the Juno spacecraft (distance, local time, jovicentric latitude and magnetic latitude).
Happy new year 2021 !

- News

Novel Jupiter campaign in support to Juno

2020-04-21T19:39:15Z

Release of the latest public Jupiter HST campaign which spanned 2019 acquired in support to Juno (Perijoves 18 to 22) :
– Jupiter, Feb.-Sep. 2019 (STIS, 50 images, 2 spectra) ;
– the time-tagged long exposure STIS images have been sequenced in 100-s long exposures, yielding 1180 new images.
– all the images have been individually re-centered to complete all the APIS data levels. Projections have been plotted with a logarythmic intensity scale and usual magnetic markers of the footprint of the galilean satellites.

Release of all Cassini/UVIS observations of Saturn

2019-10-09T09:07:35Z

Following the early release published in June 2019, a complete dataset of Cassini/UVIS auroral observations of Saturn ranging from 2004 to 2017 is now available. The data, acquired in both the Far-UV or Extreme-UV channels, have been splitted in invidual planetary scans to facilitate their use, yielding 8000 invididual data cubes provided in fits format.

Updated HST/Jupiter products

2019-06-02T19:50:31Z

Major release concerning the two public Jupiter HST campaigns ranging 2016-2018 acquired in support to Juno :
– all the time-tagged long exposure STIS images of both the May-July 2016 and Nov. 2016-Sep. 2018 campaigns have been sequenced in 100-s long exposures, yielding 1229 and 3397 new images.
– all the long exposure images of the Jupiter, Nov. 2016-Sep. 2018 campaign. have been individually re-centered and projected to complete the APIS data levels.
– the short exposure images of the Jupiter, Nov. 2016-Sep. 2018 campaign. are processed similarly : the first two APIS data levels are already available while the projections are under calculation.

Early release of Cassini/UVIS Grand Finale data

2019-06-02T18:15:27Z

Cassini/UVIS FUV calibrated auroral observations ranging the latest phase of the Cassini mission, have just been released. They include quicklooks, standard fits files and the search interface enables to directly open the datacubes with Aladin (through SAMP) :
– Saturn 2016 : 676 datacubes
– Saturn 2017 : 894 datacubes