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Shishir Dholakia

@astroshishir.bsky.social
1.4K followers 214 following 38 posts

Astrophysics PhD Candidate at UniSQ | Exoplanet detection and characterization | Astrophotography & SciComm | prev. UC Berkeley | shishirdholakia.github.io

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Reposted by Shishir Dholakia
Shashank Dholakia @astroshashank.bsky.social · 11/06/2026
Thread on our new paper on arxiv today! We stumbled across a weird sinusoidal systematic that we think appears in every observation from the NIRISS instrument on JWST. We derive a correction and see how much it impacts exoplanet spectra. (1/N) #astro #exoplanets 🔭🧪 arxiv.org/abs/2606.11983
arxiv.org
Calibration of an Analog-to-Digital Conversion Nonlinearity in JWST/NIRISS
We quantify an unusual flux-dependent systematic which is periodic in raw counts in flight data from the James Webb Space Telescope's Near Infrared Imager and Slitless Spectrograph (JWST/NIRISS), used...
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Aditya Sengupta @adiastra.bsky.social · 23/06/2025
woke up early to watch something that'll cover the entire sky every three days
rishabh pant almost falling over during a sweep shot
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Benjamin Pope @benjaminpope.bsky.social · 11/02/2025
Come work with me at Macquarie University in Sydney! Job ad is live on AAS: aas.org/jobregister/...
aas.org
Postdoctoral Research Associate | American Astronomical Society
We are seeking a Postdoctoral Research Associate in Astrostatistics to join the new Macquarie Astrostatistics Research Group.  You will be working with A/Prof Benjamin Pope on a full-time, fixed term ...
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Shashank Dholakia @astroshashank.bsky.social · 11/02/2025
Jupiter rotation timelapse with lo (and shadow) transit! Taken Feb 8th from my backyard. Went out at 5 min intervals to capture a video. From each of these, the best 10% were stacked to produce a single frame (lucky imaging). 🔭C9.25, 📷 QHYII1585C #jupiter #astrophotography #astronomy
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The Onion @theonion.com · 22/01/2025
Astronomers Discover Planet Identical To Earth With Orbital Space Mirror theonion.com/astronomers-...
Astronomers Discover Planet Identical To Earth With Orbital Space Mirror
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George Zhou @georgezhouastro.bsky.social · 20/01/2025
Come join the exoplanets team at UniSQ in Australia. Our team is seeking multiple PhD positions to understand the formation and evolution of planetary systems, involving ongoing programs on JWST, HST, and VLT. See AAS advert. Applications before March 07. aas.org/jobregister/...
aas.org
PhD Positions in Exoplanet Atmospheres and Demographics | American Astronomical Society
The Exoplanet group at University of Southern Queensland is inviting candidates for two fully funded PhD scholarships (3 years). Successful candidate will work with Dr George Zhou and Dr Chelsea Huang...
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Ryan White @astroryan.bsky.social · 18/12/2024
Do you like binary stars? How about Wolf-Rayet stars? May I introduce you to my new chapter on what happens when you put WR stars in binaries... awesome colliding wind binaries! This should be a handy resource whether you're new to or knee-deep in the field! 🔭(1/?) arxiv.org/abs/2412.12534
arxiv.org
Wolf-Rayet Colliding Wind Binaries
Wolf-Rayet stars embody the final stable phase of the most massive stars immediately before their evolution is terminated in a supernova explosion. They are responsible for some of the most extreme an...
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Shishir Dholakia @astroshishir.bsky.social · 05/12/2024
Anyone on the East bay know if the tsunami warning is being cancelled or not?
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Shashank Dholakia @astroshashank.bsky.social · 04/12/2024
Milky Way over Double Arch at Arches National Park 20s ISO3200 x18, foreground and background aligned +stacked separately and combined 🔭🌌
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Shishir Dholakia @astroshishir.bsky.social · 02/12/2024
Just got back from a trip to Arches National Park. Got a lot of shots that I'm excited to process soon! 🌌🔭
A photo of a reddish landscape with a starry sky and the Milky Way stretching vertically near the center of the sky. In the foreground are several pools of water reflecting the starry sky.
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Shashank Dholakia @astroshashank.bsky.social · 29/11/2024
Deeply sad to hear of Prof. Fajan's passing--a deeply inspiring and dedicated educator at Berkeley. When I took his instrumentation class, COVID switched us to remote mid-semester. He ended up hand soldering Arduino kits and mailing them to us for the final project.
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Shashank Dholakia @astroshashank.bsky.social · 21/11/2024
C/2023 A3 (Tsuchinshan–ATLAS) and the Moon rising over Brisbane. I took this timelapse on 30th September while it was still in the early morning sky, with @astroryan.bsky.social. Reposting on bluesky for all the new people here! 🔭🌌
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Benjamin Pope @benjaminpope.bsky.social · 21/11/2024
Applications are open til April 30 2025 for international applicants to do a Masters + PhD combo with me in astrostatistics at Macquarie University in Sydney! www.mq.edu.au/research/phd...
Macquarie central squareMacquarie lawns and theatre
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Shishir Dholakia @astroshishir.bsky.social · 18/11/2024
Finally got around to processing this short Milky Way timelapse I took a few months ago. I hope to take an extended version soon! 🔭🌌
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Shishir Dholakia @astroshishir.bsky.social · 16/11/2024
Hello new followers! I'm Shishir, and I study all things exoplanets. Below is an artist's rendition of Gliese 12 b, a planet I co-led the discovery of this year. I plan to post more cool things I come across in my research. I also love astrophotography, so stay tuned for pretty space pictures! 🪐🔭
Red planet at the right of the frame illuminated by a reddish host star, with a distant starfield in the background.
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Shishir Dholakia @astroshishir.bsky.social · 01/11/2024
I've watched the light fade from my officemate's eyes every day through postdoc application season this year
skeleton reading a book with glowing red eyes and a sign that says "do not disturb. Bob is still trying to graduate."
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Shishir Dholakia @astroshishir.bsky.social · 28/10/2024
Reposting with 🪐🔭 because I always forget
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Shishir Dholakia @astroshishir.bsky.social · 28/10/2024
My new paper is out today on searching for stellar companions with pulsation timing in TESS photometry! arxiv.org/abs/2410.19729 Paper thread below ⬇️
A graph showing a purple line resembling a sine wave, with a label at the top saying "Alpha Pictoris Phase modulations"
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Shishir Dholakia @astroshishir.bsky.social · 22/10/2024
Venus, Comet A3 (Tsuchinshan-ATLAS), the Milky Way, and Zodiacal light (if you can spot it) all in one shot! Taken at Mount Kent observatory 🪐🔭
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George Zhou @georgezhouastro.bsky.social · 21/10/2024
Comet Tsuchinshan Atlas has been quite a show over the last month. Some final shots before it fades away from us. One of the best comets I’ve see for a long time.
Comet tsuchinshan-atlas was over mt kent observatory Comet tsuchinshan atlas over farmland
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Shishir Dholakia @astroshishir.bsky.social · 11/10/2024
I got to see (and photograph) aurora for the first time!!! Particularly crazy that this was at -27° 🔭🪐
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Shishir Dholakia @astroshishir.bsky.social · 09/10/2024
This was awesome to work on, and I'm very excited for the future of oblateness studies with JWST! 🪐🔭
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George Zhou @georgezhouastro.bsky.social · 30/09/2024
The tail of Comet Tsuchinshan-Atlas stretching dozen degrees, amazing in dark skies :) With @astroshishir.bsky.social
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Shishir Dholakia @astroshishir.bsky.social · 29/09/2024
Comet A3 Tsuchinshan-ATLAS Timelapse ☄️ I've been photographing this comet for the past couple days, and I've been blown away by how bright it is. Can't wait to get back out for more tonight! Location: Queensland, Australia Equipment: Sony A7IV with 100mm lens, tracked. #astrophotography 🔭
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George Zhou @georgezhouastro.bsky.social · 26/09/2024
Tsuchinshan-ATLAS growing a nice tail now. Still difficult to see without binoculars, so low to the horizon before sunrise.
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Shashank Dholakia @astroshashank.bsky.social · 26/09/2024
Comet Tsuchinshan-ATLAS (top right) over the Brisbane skyline just before sunrise. Was visible in binoculars pretty easily! 48mm f3.2 2.0s ISO800, stack of 20 images 🔭🧪 #comet #astronomy #brisbane
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Sakhee Bhure @sakhee-space.bsky.social · 22/12/2023
Dr. Chelsea Huang and Dr. Andrew Vanderburg are hiring a postdoc interested in JWST data analysis! If you're interested in working at MIT Physics and UniSQ Australia, check out their job ad! careers.peopleclick.com/careerscp/cl...
careers.peopleclick.com
Postdoctoral Associate
<p><strong>POSTDOCTORAL ASSOCIATE</strong>, <em>Kavli Institute for Astrophysics and Space Science (MKI) and University of Southern Queensland (UniSQ)</em>, to conduct research on the atmospheres of e...
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Shishir Dholakia @astroshishir.bsky.social · 31/08/2023
Perks of doing a PhD in astronomy: sometimes you can borrow a 0.8m (!!!) telescope just to take pretty pictures
reddish nebulosity throughout the image speckled with stars and a dark hand-like structure near the centera galaxy with a yellowish core and light blue disk with several four-pointed stars thought the foreground
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