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Existence of ghost-eliminating constraints in multivielbein theory
J. Flinckman, S. F. Hassan
https://arxiv.org/abs/2510.03014 https://arxiv.org/pdf/2510.0…

Existence of ghost-eliminating constraints in multivielbein theory
We perform a Hamiltonian constraint analysis of the multivielbein theory proposed in arXiv:1804.09723. The analysis shows that the secondary constraints have the correct form to constrain the dynamical variables, thereby eliminating the problematic ghost modes that generally plague theories of interacting spin-2 fields. Under mild restrictions on the solution space, we also identify the tertiary constraints and show that these eliminate the canonical momenta associated with the ghost modes. Our…

Solar Low Energy X-ray Spectrometer on board Aditya-L1: Ground Calibration and In-flight Performance
Abhilash R. Sarwade, Ankur Kushwaha, M. C. Ramadevi, Monoj Bug, Kiran Lakshmipathaiah, Smrati Verma, Vaishali Sharan, K. Sankarasubramanian
https://arxiv.org/abs/2509.26292

Solar Low Energy X-ray Spectrometer on board Aditya-L1: Ground Calibration and In-flight Performance
The Solar Low-Energy X-ray Spectrometer (SoLEXS) on board India's Aditya-L1 mission was launched on 2 September 2023 and commenced solar observations on 13 December 2023 following successful aperture cover deployment. Operating from the Sun-Earth L1 Lagrange point, SoLEXS has been providing continuous Sun-as-a-star soft X-ray spectroscopy across 2-22 keV with 170 eV resolution at 5.9 keV and 1-second temporal cadence since 6 January 2024. The instrument employs two Silicon Drift Detectors with …