APPLESOSS: A Producer of ProfiLEs for SOSS. Application to the NIRISS SOSS Mode. (1st October 2022)
- Record Type:
- Journal Article
- Title:
- APPLESOSS: A Producer of ProfiLEs for SOSS. Application to the NIRISS SOSS Mode. (1st October 2022)
- Main Title:
- APPLESOSS: A Producer of ProfiLEs for SOSS. Application to the NIRISS SOSS Mode
- Authors:
- Radica, Michael
Albert, Loïc
Taylor, Jake
Lafrenière, David
Coulombe, Louis-Philippe
Darveau-Bernier, Antoine
Doyon, René
Cook, Neil
Cowan, Nicolas
Espinoza, Néstor
Johnstone, Doug
Kaltenegger, Lisa
Piaulet, Caroline
Roy, Arpita
Talens, Geert Jan - Abstract:
- Abstract: The SOSS mode of the Near Infrared Imager and Slitless Spectrograph instrument is poised to be one of the workhorse modes for exoplanet atmosphere observations with the newly launched James Webb Space Telescope (JWST). One of the challenges of the SOSS mode, however, is the physical overlap of the first two diffraction orders of the G700XD grism on the detector. Recently, the ATOCA algorithm was developed and implemented as an option in the official JWST pipeline, as a method to extract SOSS spectra by decontaminating the detector—that is, separating the first and second orders. Here, we present A Producer of ProfiLEs for SOSS (APPLESOSS), which generates the spatial profiles for each diffraction order upon which ATOCA relies. We validate APPLESOSS using simulated SOSS time series observations of WASP-52 b, and compare it to ATOCA extractions using two other spatial profiles (a best and worst case scenario on-sky), as well as a simple box extraction performed without taking into account the order contamination. We demonstrate that APPLESOSS profiles retain a high degree of fidelity to the true underlying spatial profiles, and therefore yield accurate extracted spectra. We further confirm that the effects of the order contamination for relative measurements (e.g., exoplanet transmission or emission observations) is small—the transmission spectrum obtained from each of our four tests, including the contaminated box extraction, is consistent at the ∼1 σ level with theAbstract: The SOSS mode of the Near Infrared Imager and Slitless Spectrograph instrument is poised to be one of the workhorse modes for exoplanet atmosphere observations with the newly launched James Webb Space Telescope (JWST). One of the challenges of the SOSS mode, however, is the physical overlap of the first two diffraction orders of the G700XD grism on the detector. Recently, the ATOCA algorithm was developed and implemented as an option in the official JWST pipeline, as a method to extract SOSS spectra by decontaminating the detector—that is, separating the first and second orders. Here, we present A Producer of ProfiLEs for SOSS (APPLESOSS), which generates the spatial profiles for each diffraction order upon which ATOCA relies. We validate APPLESOSS using simulated SOSS time series observations of WASP-52 b, and compare it to ATOCA extractions using two other spatial profiles (a best and worst case scenario on-sky), as well as a simple box extraction performed without taking into account the order contamination. We demonstrate that APPLESOSS profiles retain a high degree of fidelity to the true underlying spatial profiles, and therefore yield accurate extracted spectra. We further confirm that the effects of the order contamination for relative measurements (e.g., exoplanet transmission or emission observations) is small—the transmission spectrum obtained from each of our four tests, including the contaminated box extraction, is consistent at the ∼1 σ level with the atmosphere model input into our noiseless simulations. We further confirm via a retrieval analysis that the atmosphere parameters (metallicity and C/O) obtained from each transmission spectrum are consistent with the true underlying values. … (more)
- Is Part Of:
- Publications of the Astronomical Society of the Pacific. Volume 134:Number 1040(2022)
- Journal:
- Publications of the Astronomical Society of the Pacific
- Issue:
- Volume 134:Number 1040(2022)
- Issue Display:
- Volume 134, Issue 1040 (2022)
- Year:
- 2022
- Volume:
- 134
- Issue:
- 1040
- Issue Sort Value:
- 2022-0134-1040-0000
- Page Start:
- Page End:
- Publication Date:
- 2022-10-01
- Subjects:
- Astronomy -- Periodicals
Astronomy
Periodicals
Periodicals
520.5 - Journal URLs:
- http://ejournals.ebsco.com/direct.asp?JournalID=101605 ↗
http://iopscience.iop.org/journal/1538-3873 ↗
http://www.journals.uchicago.edu/PASP/journal/ ↗
http://www.jstor.org/journals/00046280.html ↗
http://www.iop.org/ ↗ - DOI:
- 10.1088/1538-3873/ac9430 ↗
- Languages:
- English
- ISSNs:
- 0004-6280
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 24026.xml