Prajwel Joseph
@prajwel.bsky.social
Project scientist at the AstroSat UVIT Payload Operations Centre, Indian Institute of Astrophysics, Bengaluru. http://prajwel.github.io
A rare case of large AstroSat pointing drift captured in UVIT visible channel images
UVIT VIS channel captures images every second, used for telescope pointing drift correction. This movie, created from ~600 VIS channel images, highlights a particularly severe but rare case.
UVIT VIS channel captures images every second, used for telescope pointing drift correction. This movie, created from ~600 VIS channel images, highlights a particularly severe but rare case.
October 19, 2025 at 6:26 AM
A rare case of large AstroSat pointing drift captured in UVIT visible channel images
UVIT VIS channel captures images every second, used for telescope pointing drift correction. This movie, created from ~600 VIS channel images, highlights a particularly severe but rare case.
UVIT VIS channel captures images every second, used for telescope pointing drift correction. This movie, created from ~600 VIS channel images, highlights a particularly severe but rare case.
UVIT data release version 7 is now available on ISRO’s PRADAN AstroSat archive!
Archive: pradan.issdc.gov.in
UVIT Level2 pipeline version 7 article: arxiv.org/abs/2504.00982
UVIT Level2 pipeline GitHub repository: github.com/prajwel/UVPipe
Archive: pradan.issdc.gov.in
UVIT Level2 pipeline version 7 article: arxiv.org/abs/2504.00982
UVIT Level2 pipeline GitHub repository: github.com/prajwel/UVPipe
October 12, 2025 at 1:39 PM
UVIT data release version 7 is now available on ISRO’s PRADAN AstroSat archive!
Archive: pradan.issdc.gov.in
UVIT Level2 pipeline version 7 article: arxiv.org/abs/2504.00982
UVIT Level2 pipeline GitHub repository: github.com/prajwel/UVPipe
Archive: pradan.issdc.gov.in
UVIT Level2 pipeline version 7 article: arxiv.org/abs/2504.00982
UVIT Level2 pipeline GitHub repository: github.com/prajwel/UVPipe
AstroSat UVIT view of the WLM galaxy
There are three images. The first one is at nearly the original UVIT imaging resolution. The second has a slightly degraded resolution but reveals fainter features more clearly. The last one was more of an intentional experiment.
Blue: FUV
Yellow: NUV
There are three images. The first one is at nearly the original UVIT imaging resolution. The second has a slightly degraded resolution but reveals fainter features more clearly. The last one was more of an intentional experiment.
Blue: FUV
Yellow: NUV
October 11, 2025 at 3:22 PM
AstroSat UVIT view of the WLM galaxy
There are three images. The first one is at nearly the original UVIT imaging resolution. The second has a slightly degraded resolution but reveals fainter features more clearly. The last one was more of an intentional experiment.
Blue: FUV
Yellow: NUV
There are three images. The first one is at nearly the original UVIT imaging resolution. The second has a slightly degraded resolution but reveals fainter features more clearly. The last one was more of an intentional experiment.
Blue: FUV
Yellow: NUV
AstroSat UVIT view of NGC 3718
This false-colour image of the galaxy NGC 3718 combines data from the UVIT onboard AstroSat. The FUV channel is shown in blue, while the NUV channel is shown in yellow.
This false-colour image of the galaxy NGC 3718 combines data from the UVIT onboard AstroSat. The FUV channel is shown in blue, while the NUV channel is shown in yellow.
October 5, 2025 at 5:52 PM
AstroSat UVIT view of NGC 3718
This false-colour image of the galaxy NGC 3718 combines data from the UVIT onboard AstroSat. The FUV channel is shown in blue, while the NUV channel is shown in yellow.
This false-colour image of the galaxy NGC 3718 combines data from the UVIT onboard AstroSat. The FUV channel is shown in blue, while the NUV channel is shown in yellow.
I'm deeply interested in how ideas in astronomy and physics have developed over time, which is what initially drew me to this article. It turned out to be an excellent read! Only towards the end did I realise who the author is and the significant contributions he made to astrometry.
The History of Astrometry
The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical obser...
arxiv.org
June 18, 2025 at 6:41 PM
I'm deeply interested in how ideas in astronomy and physics have developed over time, which is what initially drew me to this article. It turned out to be an excellent read! Only towards the end did I realise who the author is and the significant contributions he made to astrometry.
ARTSonomy!
Bringing arts and astronomy together at the Indian Institute of Astrophysics, Bangalore.
#astronomy #arts #IIAPBangalore #bengaluru #bangalore #nationalscienceday
Bringing arts and astronomy together at the Indian Institute of Astrophysics, Bangalore.
#astronomy #arts #IIAPBangalore #bengaluru #bangalore #nationalscienceday
March 4, 2025 at 2:07 PM
ARTSonomy!
Bringing arts and astronomy together at the Indian Institute of Astrophysics, Bangalore.
#astronomy #arts #IIAPBangalore #bengaluru #bangalore #nationalscienceday
Bringing arts and astronomy together at the Indian Institute of Astrophysics, Bangalore.
#astronomy #arts #IIAPBangalore #bengaluru #bangalore #nationalscienceday
Had a wonderful time interacting with students about UVIT, sharing its capabilities and the exciting science it enables! Thanks to Vainu Bappu Observatory for the pictures.
February 10, 2025 at 5:03 PM
Had a wonderful time interacting with students about UVIT, sharing its capabilities and the exciting science it enables! Thanks to Vainu Bappu Observatory for the pictures.
I am happy to see my package (Aafitrans) usage statistics picking up. But who is using it!? 🧐🤔
February 10, 2025 at 5:03 PM
I am happy to see my package (Aafitrans) usage statistics picking up. But who is using it!? 🧐🤔
AstroSat UVIT image gallery: https://www.flickr.com/photos/iiabengaluru/ @IIABengaluru
February 10, 2025 at 5:03 PM
AstroSat UVIT image gallery: https://www.flickr.com/photos/iiabengaluru/ @IIABengaluru
I'm forced to look at the destruction
Sometimes creation
They appear far, in a different time The intrigued blind steal my visions
I hear there are others like me
Their visions are taken too I'll soon die
someone else with better eyes
will be forced to take my place
Sometimes creation
They appear far, in a different time The intrigued blind steal my visions
I hear there are others like me
Their visions are taken too I'll soon die
someone else with better eyes
will be forced to take my place
February 10, 2025 at 5:02 PM
I'm forced to look at the destruction
Sometimes creation
They appear far, in a different time The intrigued blind steal my visions
I hear there are others like me
Their visions are taken too I'll soon die
someone else with better eyes
will be forced to take my place
Sometimes creation
They appear far, in a different time The intrigued blind steal my visions
I hear there are others like me
Their visions are taken too I'll soon die
someone else with better eyes
will be forced to take my place
Remember to give credit where it’s due! Each publication is a testament to the countless hours spent on software development and data generation. Let’s acknowledge these efforts by citing the software and data we use. #OpenScience #astronomy
February 10, 2025 at 5:02 PM
Remember to give credit where it’s due! Each publication is a testament to the countless hours spent on software development and data generation. Let’s acknowledge these efforts by citing the software and data we use. #OpenScience #astronomy
February 10, 2025 at 5:02 PM
This AstroSat UVIT image showcases the exquisite beauty and grandeur of the Pinwheel Galaxy, revealing its graceful spiral structure and countless shimmering stars. Note: Created using publicly available UVIT observations from 2016. No supernova 🥲!
February 10, 2025 at 5:02 PM
This AstroSat UVIT image showcases the exquisite beauty and grandeur of the Pinwheel Galaxy, revealing its graceful spiral structure and countless shimmering stars. Note: Created using publicly available UVIT observations from 2016. No supernova 🥲!
I'm thrilled to announce the publication of a new paper on astroSat/UVIT, which I had the opportunity to co-author. Our paper showcases a stunning image of NGC 5291. Peer-reviewed article: https://t.co/HmbPkem0M3 See: https://t.co/fPwyf5Mwkf
February 10, 2025 at 5:02 PM
I'm thrilled to announce the publication of a new paper on astroSat/UVIT, which I had the opportunity to co-author. Our paper showcases a stunning image of NGC 5291. Peer-reviewed article: https://t.co/HmbPkem0M3 See: https://t.co/fPwyf5Mwkf
News for #AstroSat #UVIT users! The latest version of Curvit (1.6.1) introduces a new curve_orbitwise() function, perfect for studying the long-term variability of sources. Get the most out of your UVIT data using Curvit. Visit: https://t.co/ODuCI1MDfr #python #astronomy
February 10, 2025 at 5:02 PM
News for #AstroSat #UVIT users! The latest version of Curvit (1.6.1) introduces a new curve_orbitwise() function, perfect for studying the long-term variability of sources. Get the most out of your UVIT data using Curvit. Visit: https://t.co/ODuCI1MDfr #python #astronomy
Version 2: A simple @manim_community animation to show how AstroSat UVIT observes the sky in photon counting mode. If you are interested, the source code is at https://github.com/prajwel/manim_stuff
February 10, 2025 at 5:02 PM
Version 2: A simple @manim_community animation to show how AstroSat UVIT observes the sky in photon counting mode. If you are interested, the source code is at https://github.com/prajwel/manim_stuff
A simple @manim_community animation to show how AstroSat UVIT observes the sky in photon counting mode. source: https://github.com/prajwel/manim_stuff/blob/main/UVIT_photon_counting_mode_animation.py
February 10, 2025 at 5:01 PM
A simple @manim_community animation to show how AstroSat UVIT observes the sky in photon counting mode. source: https://github.com/prajwel/manim_stuff/blob/main/UVIT_photon_counting_mode_animation.py
Astrosat/UVIT image of Cygnus loop
February 10, 2025 at 5:01 PM
Astrosat/UVIT image of Cygnus loop
Gazing into the celestial realm, the cosmic eye peers deep into the heart of the Helix nebula, its ultraviolet vision piercing the veil of gas and dust to reveal the brilliant, burning heart of this stellar nursery. Captured by the astro-photographic prowess of the AstroSat ...
February 10, 2025 at 5:00 PM
Gazing into the celestial realm, the cosmic eye peers deep into the heart of the Helix nebula, its ultraviolet vision piercing the veil of gas and dust to reveal the brilliant, burning heart of this stellar nursery. Captured by the astro-photographic prowess of the AstroSat ...
AstroSat UVIT image of Helix Nebula Created by co-adding Helix nebula's publicly available UVIT data using Curvit (https://curvit.readthedocs.io/en/latest/api/combine_events_lists.html, threshold=8, NUM_NEAREST_NEIGHBORS=8, MIN_MATCHES_FRACTION=0.01). FUV channel in blue and NUV in yellow.
February 10, 2025 at 5:00 PM
AstroSat UVIT image of Helix Nebula Created by co-adding Helix nebula's publicly available UVIT data using Curvit (https://curvit.readthedocs.io/en/latest/api/combine_events_lists.html, threshold=8, NUM_NEAREST_NEIGHBORS=8, MIN_MATCHES_FRACTION=0.01). FUV channel in blue and NUV in yellow.
ChatGPT's take on dark matter in astrophysics 😁. #darkmatter
February 10, 2025 at 5:00 PM
ChatGPT's take on dark matter in astrophysics 😁. #darkmatter
NGC 3603 is interesting. In this image created from HST data, there are different stages of the matter cycle in the Universe visible. #astronomy #Hubble
February 10, 2025 at 5:00 PM
NGC 3603 is interesting. In this image created from HST data, there are different stages of the matter cycle in the Universe visible. #astronomy #Hubble
Heartbreaking
https://apnews.com/article/afghanistan-education-economy-kabul-aa352195f277a6d40a0f25f15601f693 https://x.com/ChrisMegerian/status/1572943511250694144
https://apnews.com/article/afghanistan-education-economy-kabul-aa352195f277a6d40a0f25f15601f693 https://x.com/ChrisMegerian/status/1572943511250694144
AP PHOTOS: Backbreaking work for kids in Afghan brick kilns
KABUL, Afghanistan (AP) — Nabila works 10 hours or more a day, doing the heavy, dirty labor of packing mud into molds and hauling wheelbarrows full of bricks.
apnews.com
February 10, 2025 at 5:00 PM
We studied the effect of Active Galactic Nucleus (AGN) on star formation in the galaxy NGC 3982 using GALEX, MaNGA, and VLASS data in a new article (Accepted in A&A). The manuscript (check out the interactive figure inside!): https://arxiv.org/abs/2209.04914 @sdssurveys @plotlygraphs
February 10, 2025 at 5:00 PM
We studied the effect of Active Galactic Nucleus (AGN) on star formation in the galaxy NGC 3982 using GALEX, MaNGA, and VLASS data in a new article (Accepted in A&A). The manuscript (check out the interactive figure inside!): https://arxiv.org/abs/2209.04914 @sdssurveys @plotlygraphs
Colour composite images made from UVIT and JWST imaging of Stephan’s Quintet https://prajwel.github.io/stephans_quintet/
February 10, 2025 at 5:00 PM
Colour composite images made from UVIT and JWST imaging of Stephan’s Quintet https://prajwel.github.io/stephans_quintet/