Guillaume Bertrand
@guillaumebertrand.bsky.social
Amateur astronomer (Astrophysics, Spectroscopy, Photometry...)
🪐 🌈 🔭 | Science lover | Musician 🎵
https://guillaumebertrand.notion.site
https://staros-projects.org
https://www.sunscan.net
🪐 🌈 🔭 | Science lover | Musician 🎵
https://guillaumebertrand.notion.site
https://staros-projects.org
https://www.sunscan.net
Le soleil hier avec le petit télescope solaire SUNSCAN 😃🔭🌞
November 9, 2025 at 8:36 AM
Le soleil hier avec le petit télescope solaire SUNSCAN 😃🔭🌞
Proud to present the new version of the SUNSCAN mobile app: v1.4.3. 🔭🚀 Available on iOS and Android. Lots of new features coming 😁 And for those who don't know about #SUNSCAN, come discover this smart solar telescope designed by the #STAROS association as an open source project here: www.sunscan.net
October 30, 2025 at 8:03 PM
Proud to present the new version of the SUNSCAN mobile app: v1.4.3. 🔭🚀 Available on iOS and Android. Lots of new features coming 😁 And for those who don't know about #SUNSCAN, come discover this smart solar telescope designed by the #STAROS association as an open source project here: www.sunscan.net
Despite tough conditions (technical issues), I managed to capture a spectrum 🌈 of Nova Ser 2025 (V691 Ser) and do V-band photometry. #astronomy #astrophysics
July 25, 2025 at 4:29 PM
Despite tough conditions (technical issues), I managed to capture a spectrum 🌈 of Nova Ser 2025 (V691 Ser) and do V-band photometry. #astronomy #astrophysics
The #Sun in live with the small solar telescope #SUNSCAN and my iPad. H-alpha and Ca II H lines. #astronomy #astrophotography
July 12, 2025 at 9:19 AM
The #Sun in live with the small solar telescope #SUNSCAN and my iPad. H-alpha and Ca II H lines. #astronomy #astrophotography
My first exoplanet transit with my little 6-inch Newtonian telescope 🔭 not perfect but what a cool experience! 💫Here is the photometric curve of Qatar-6b! var.astro.cz/fr/Exoplanet... #astrophysics #astronomy #photometry
June 29, 2025 at 10:53 AM
My first exoplanet transit with my little 6-inch Newtonian telescope 🔭 not perfect but what a cool experience! 💫Here is the photometric curve of Qatar-6b! var.astro.cz/fr/Exoplanet... #astrophysics #astronomy #photometry
The #sun live with #sunscan and my ipad. Some magnificent protuberances under a coronal sky but a lot of atmospheric turbulence. ☀️🔭 www.sunscan.net #astrophotography #astronomy
June 28, 2025 at 12:42 PM
The #sun live with #sunscan and my ipad. Some magnificent protuberances under a coronal sky but a lot of atmospheric turbulence. ☀️🔭 www.sunscan.net #astrophotography #astronomy
Here's a cool spectro and photometry experiment to measure the mass of supermassive black holes from your backyard :) Based on single-epoch estimators in broad-line AGN. 🌈🔭 #astrophysics #astronomy #spectroscopy #photometry
guillaumebertrand.notion.site/Estimating-b...
guillaumebertrand.notion.site/Estimating-b...
June 26, 2025 at 11:43 AM
Here's a cool spectro and photometry experiment to measure the mass of supermassive black holes from your backyard :) Based on single-epoch estimators in broad-line AGN. 🌈🔭 #astrophysics #astronomy #spectroscopy #photometry
guillaumebertrand.notion.site/Estimating-b...
guillaumebertrand.notion.site/Estimating-b...
Here is some work on spectral reflectance study of asteroids with the Star’Ex low-resolution spectrography #astronomy #astrophysics #spectroscopy guillaumebertrand.notion.site/Spectral-Ref...
June 21, 2025 at 6:10 AM
Here is some work on spectral reflectance study of asteroids with the Star’Ex low-resolution spectrography #astronomy #astrophysics #spectroscopy guillaumebertrand.notion.site/Spectral-Ref...
The sun this morning with the small #SUNSCAN solar telescope and my smartphone 🔭🌞 #STAROS #astrophotography #astronomy #astrophysics
June 9, 2025 at 4:00 PM
The sun this morning with the small #SUNSCAN solar telescope and my smartphone 🔭🌞 #STAROS #astrophotography #astronomy #astrophysics
The sun this morning in several wavelengths (h-alpha, helium and continuum) with the small #SUNSCAN solar telescope and my smartphone. #astrophotography #staros #sun #astrophysics
May 23, 2025 at 9:53 AM
The sun this morning in several wavelengths (h-alpha, helium and continuum) with the small #SUNSCAN solar telescope and my smartphone. #astrophotography #staros #sun #astrophysics
#STAROS campaign updates. Here are the dynamic residual Hα spectra of σ Gem, after subtracting the average line profile. Red indicates areas of increased emission, and blue indicates regions of increased absorption relative to the average level.
guillaumebertrand.notion.site/The-spectros...
#astro
guillaumebertrand.notion.site/The-spectros...
#astro
May 10, 2025 at 9:53 AM
#STAROS campaign updates. Here are the dynamic residual Hα spectra of σ Gem, after subtracting the average line profile. Red indicates areas of increased emission, and blue indicates regions of increased absorption relative to the average level.
guillaumebertrand.notion.site/The-spectros...
#astro
guillaumebertrand.notion.site/The-spectros...
#astro
A quick session with #SUNSCAN this morning before the clouds rolled in. Beautiful prominences and still the large sunspot 4079. #STAROS #Astrophotography #Astrophysics #Sun
May 9, 2025 at 9:08 AM
A quick session with #SUNSCAN this morning before the clouds rolled in. Beautiful prominences and still the large sunspot 4079. #STAROS #Astrophotography #Astrophysics #Sun
The Sun today, captured with the small solar telescope #SUNSCAN and my smartphone. #SUN #Astrophotography #Astrophysics
www.sunscan.net
www.sunscan.net
May 6, 2025 at 9:03 AM
The Sun today, captured with the small solar telescope #SUNSCAN and my smartphone. #SUN #Astrophotography #Astrophysics
www.sunscan.net
www.sunscan.net
The Sun today, captured with the smart solar telescope #SUNSCAN and my smartphone. Note the presence of the impressive large sunspot 4079. This sunspot has a ‘beta-gamma’ magnetic field that holds the energy for potential M-class solar flares. #SUN #Astrophotogrpahy #Astrophysics
www.sunscan.net
www.sunscan.net
May 3, 2025 at 12:19 PM
The Sun today, captured with the smart solar telescope #SUNSCAN and my smartphone. Note the presence of the impressive large sunspot 4079. This sunspot has a ‘beta-gamma’ magnetic field that holds the energy for potential M-class solar flares. #SUN #Astrophotogrpahy #Astrophysics
www.sunscan.net
www.sunscan.net
The sun this morning with SUNSCAN in the h-hapha and helium wavelengths + a continuum image. Nice activity, nice prominences and a dozen sunspot groups. #STAROS #SUNSCAN #Astrophotography #Astronomy #Astrophysics
April 27, 2025 at 8:34 AM
The sun this morning with SUNSCAN in the h-hapha and helium wavelengths + a continuum image. Nice activity, nice prominences and a dozen sunspot groups. #STAROS #SUNSCAN #Astrophotography #Astronomy #Astrophysics
Here are some preliminary results from the #STAROS campaign launched on the double star Sigma Gem. Already 55 spectra, 14 amateur astronomers in 3 weeks! #astronomy #astrophysics
April 23, 2025 at 6:50 PM
Here are some preliminary results from the #STAROS campaign launched on the double star Sigma Gem. Already 55 spectra, 14 amateur astronomers in 3 weeks! #astronomy #astrophysics
We're thrilled to kick off a new #STAROS campaign : this time focusing on Sigma Gem, a K1 III-type star. 🔭✨ It's a single-lined spectroscopic binary and a chromospherically active RS CVn star. The Hα line reveals dynamic starspot activity tied to its rotation. 🚀 sigmagem.staros-projects.org
April 8, 2025 at 6:26 PM
We're thrilled to kick off a new #STAROS campaign : this time focusing on Sigma Gem, a K1 III-type star. 🔭✨ It's a single-lined spectroscopic binary and a chromospherically active RS CVn star. The Hα line reveals dynamic starspot activity tied to its rotation. 🚀 sigmagem.staros-projects.org
Same in the Helium D3 line.
April 5, 2025 at 3:22 PM
Same in the Helium D3 line.
The sun today with the small SUNSCAN smart solar telescope and my smartphone. 🔭😎🌞 #STAROS #SUNSCAN #Astrophotography #Sun #Astronomy www.sunscan.net
April 5, 2025 at 11:06 AM
The sun today with the small SUNSCAN smart solar telescope and my smartphone. 🔭😎🌞 #STAROS #SUNSCAN #Astrophotography #Sun #Astronomy www.sunscan.net
The eclipse, between the clouds with the small SUNSCAN solar telescope. I just waited 2 to 3 minutes for the sun to pass in front of the instrument, then a click on the smartphone and here is the result 🔭😎🌞
#SUNSCAN #ECLIPSE #ASTROPHOTOGRAPHY #STAROS
#SUNSCAN #ECLIPSE #ASTROPHOTOGRAPHY #STAROS
March 29, 2025 at 1:25 PM
The eclipse, between the clouds with the small SUNSCAN solar telescope. I just waited 2 to 3 minutes for the sun to pass in front of the instrument, then a click on the smartphone and here is the result 🔭😎🌞
#SUNSCAN #ECLIPSE #ASTROPHOTOGRAPHY #STAROS
#SUNSCAN #ECLIPSE #ASTROPHOTOGRAPHY #STAROS
February 28, 2025 at 3:18 PM
Some recent results in high-resolution spectroscopy from my backyard on two completely different stars. First, a hot star of spectral type B2III, and then a cooler star of spectral type K1III (a double and variable star of the RS Canum Venaticorum type). #spectroscopy #astronomy #astrophysics
February 2, 2025 at 7:55 PM
Some recent results in high-resolution spectroscopy from my backyard on two completely different stars. First, a hot star of spectral type B2III, and then a cooler star of spectral type K1III (a double and variable star of the RS Canum Venaticorum type). #spectroscopy #astronomy #astrophysics
The Sun today with the mini spectroheliograph SUNSCAN. 1 minute to set up, 3 minutes to let the Sun pass in front of the lens, 2 minutes to process, retrieve, and share the images with my smartphone 😀 pure enjoyment ! 🔭☀️
#sunscan #astrophotography #sun #astronomy
#sunscan #astrophotography #sun #astronomy
February 2, 2025 at 12:30 PM
The Sun today with the mini spectroheliograph SUNSCAN. 1 minute to set up, 3 minutes to let the Sun pass in front of the lens, 2 minutes to process, retrieve, and share the images with my smartphone 😀 pure enjoyment ! 🔭☀️
#sunscan #astrophotography #sun #astronomy
#sunscan #astrophotography #sun #astronomy