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JWST Observer @jwstobserver.bsky.social · 17h

For #JWST Cycle 5, proposals should be submitted even if observations appear non-schedulable in APT due to guide star availability in bright crowded fields. Get the details: ow.ly/qlTG50X8LK8

Illustration of magnified Webb mirror hexagons showing different images of Webb's science capabilities with an image of the telescope in the middle hexagon

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JWST Observer @jwstobserver.bsky.social · 2d

Join us for Webb Office Hours on October 9th and 23rd at 11 am (ET) to get your data-related questions answered by #JWST experts. APT and ETC experts will be available for proposal preparation questions during the October 9th session: https://ow.ly/BXTO50V6VNJ

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JWST Observer @jwstobserver.bsky.social · 6d

#JWST Cycle 5 proposals can take advantage of NIRCam and NIRISS multistripe capabilities. Read more: https://ow.ly/E41350X5OrY

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JWST Observer @jwstobserver.bsky.social · 13d

In the event of a potential partial U.S. government shutdown, STScI will extend the deadline for #JWST Cycle 5 proposals involving scientists who are unable to undertake research during that time. Get the details: ow.ly/pErA50X2eAi

Collage of space images within a hexagon mirror illustrating JWST's science themes

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JWST Observer @jwstobserver.bsky.social · 16d

Access all of the materials, including presentations, notes, exercises, and videos, covered during the 2025 JWST Summer School held in August: ow.ly/CW4150X0NQn

Promotional image for the JWST Summer School

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JWST Observer @jwstobserver.bsky.social · 29d

Join us for Webb Office Hours on September 11th and 25th at 11 am (ET) to get your data-related questions answered by #JWST experts. APT and ETC experts will be available for proposal preparation questions in the September sessions: ow.ly/BXTO50V6VNJ

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JWST Observer @jwstobserver.bsky.social · Sep 4

Read the latest about JWST's Rocky Worlds Director's Discretionary Time program, including final targets and an upcoming information session: ow.ly/mgxA50WReQt

Artist's concept of rocky exoplanet GJ 486 b

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JWST Observer @jwstobserver.bsky.social · Sep 3

Don't wait! Check out the online resources STScI offers to help you prepare your #JWST Cycle 5 proposal: ow.ly/C0qU50WQofI

Screenshot of the top of the JDox homepage shown on a tablet with a space background

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JWST Observer @jwstobserver.bsky.social · Aug 26

New sky background images for #JWST's NIRISS Wide-Field Slitless Spectroscopy mode significantly improve the subtraction of the sky background in WFSS data. Read more: ow.ly/8U9e50WMevy

Line drawing of JWST on a composite background of the Cartwheel Galaxy observed by JWST

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JWST Observer @jwstobserver.bsky.social · Aug 22

A new MIRI Wide Field Slitless Spectroscopy mode, which enables efficient spectroscopic observations of multiple sources in a single pointing, is available for #JWST Cycle 5. Get the details: ow.ly/Cq8G50WKcM5

Line drawing of JWST on a background of Stephan's Quintet observed by JWST using MIRI

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JWST Observer @jwstobserver.bsky.social · Aug 13

Check out the next 4 JWebbinars offered in August and September to help the community prepare for #JWST Cycle 5: ow.ly/J9Zu50WFcK9

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JWST Observer @jwstobserver.bsky.social · Aug 11

Join us for Webb Office Hours on August 14th and 28th at 11 am (ET) to get your data-related questions answered by #JWST experts: ow.ly/BXTO50V6VNJ

JWST Observer @jwstobserver.bsky.social · Aug 6

Build 12.0 includes improvements for #JWST's MIRI, NIRCam, and NIRISS instruments as well as time-series observations. Read more: ow.ly/FPR650WAGse

Line drawing of JWST on a background of the Cosmic Cliffs observed by JWST using NIRCam

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JWST Observer @jwstobserver.bsky.social · Aug 1

New models of the count rate better predict the decrease in future observing cycles. These models will be incorporated into upcoming Build 12.1 of the pipeline (expected November 2025) and Cycle 6 of the #JWST ETC. Get the details: ow.ly/YRFr50WyJh6

Line drawing of JWST on a background of the Deep Field observed by JWST using MIRI

JWST Observer @jwstobserver.bsky.social · Aug 1

We are pleased to announce the release of the #JWST Cycle 5 Call for Proposals for General Observer and Survey time and funding for Archival Research programs. Read more: ow.ly/IjWC50WyF62

Magnified view of hexagonal shapes showing various space images illustrating JWST's science themes

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JWST Observer @jwstobserver.bsky.social · Jul 31

Version 5.0 of the #JWST ETC features added support for MIRI WFSS mode and 4 new NIRISS SOSS multi-stripe subarrays, easier sharing and better error messaging, and backend improvements to better support hundreds of simultaneous users. Get the details: ow.ly/xrs150WygRA

Line drawing of JWST on a background of the Tarantula Nebula observed by JWST using MIRI

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JWST Observer @jwstobserver.bsky.social · Jul 9

Join us for Webb Office Hours on July 10th and 24th at 11 am (ET) to get your data-related questions answered by #JWST experts: ow.ly/BXTO50V6VNJ

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JWST Observer @jwstobserver.bsky.social · Jul 8

Build 11.3 includes an improved method to correct for MIRI Medium Resolution Spectrometer (MRS) cosmic ray “shower” artifacts. Get the details: ow.ly/VyRO50Wmtsa

Line drawing of JWST on a background of the Southern Ring nebula observed by JWST using MIRI

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JWST Observer @jwstobserver.bsky.social · Jun 18

Get the latest updates about #JWST's Rocky Worlds Director's Discretionary Time program, including new targets and first observations. Read more: ow.ly/PkY750Wbzv8

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JWST Observer @jwstobserver.bsky.social · Jun 10

The STScI Town Hall at #AAS246, today at 12:45 pm (AKDT) in Tubughnenq' 5, will feature mission updates, including a progress report on the #JWST/HST Rocky Worlds Director’s Discretionary Time program and highlight synergies with the upcoming Habitable Worlds Observatory.

Illustration of JWST highlighting its golden mirrors, with "Webb Space Telescope" to the right of the mirrors and stars in the background

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JWST Observer @jwstobserver.bsky.social · Jun 8

If you’re attending #AAS246 in person, stop by the STScI exhibitor booth during regular booth hours to speak with a #JWST expert on a range of topics from proposal planning to data analysis tools. You can also book a one-on-one “Ask-The-Experts” session.

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JWST Observer @jwstobserver.bsky.social · Jun 6

Join us from June 8 to 12 at #AAS246 in Anchorage, AK. The STScI Town Hall on June 10 will include #JWST mission updates. You can also visit us at the STScI Exhibitor Booth to ask questions of our experts.

Promotional image for the 246th Meeting of the American Astronomical Society, Anchorage, Alaska, 8 to 12 June 2025

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JWST Observer @jwstobserver.bsky.social · Jun 4

Virtual registration is now open for the first week of the JWST Summer School to be held August 4 to 8, 2025. Get the details: ow.ly/o8Ns50W4jUy

Promotional image for JWST Summer School

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JWST Observer @jwstobserver.bsky.social · May 29

The report from the 18th #JWST Users Committee (JSTUC) meeting in March is now available and includes feedback, updates, and formal recommendations. Read the report: ow.ly/RjVW50W0OHQ

Line drawing of JWST on a background of the Tarantula Nebula observed by JWST using NIRCam

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JWST Observer @jwstobserver.bsky.social · May 13

#JWST Pipeline Build 11.3 provides major improvements to MIRI MRS cosmic ray showers, along with other updates. Get the details: ow.ly/5Cp950VS06K

Line drawing of JWST on a background of the Cartwheel Galaxy observed by JWST using MIRI

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