L1 ⚛ L1-166 ⊙ Testnet

Stellar Coronagraphy PSF Subtraction

Astronomy · High-contrast imaging

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⬇ L1-166.md

# ⚛ L1 Principle — Stellar Coronagraphy PSF Subtraction **ID:** `L1-166` · **Status:** ⊙ Testnet (genesis catalog) > **🌐 Domain:** Astronomy — *High-contrast imaging* > **🎯 Problem class:** linear inverse · **🧮 Solution space:** 2D companion flux > **📡 Carrier:** photon · **🌫 Noise:** shot poisson > **⚖ Difficulty (δ):** 3 · **⛓ Block:** 41554243 --- ## 🧠 1. Introduction **Stellar Coronagraphy PSF Subtraction** is a **linear inverse problem** whose unknown lives in **2D companion flux** space, within the **High-contrast imaging** sub-domain of **Astronomy**. Measurements consist of photons collected by an optical detector via a **coronagraphic psf subtraction** sensing mechanism. The forward operator applies, in order: K · psf · coronagraph operator; S · speckle · reference operator; detector accumulates flux over the exposure window. Observations are corrupted by Poisson shot noise from quantum-limited detection. Existence of the recovered 2D_companion_flux is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 100); speckle_evolution_rate dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Shot poisson sets the irreducible data-fidelity floor. ## ⚙ 2. Forward Model Physical chain: **x** → K · psf · coronagraph → S · speckle · reference → Temporal integration → **y** (detector). ``` y = ∫_t dt `S.speckle.reference` `K.psf.coronagraph` x, measurements ~ Poisson(αy) ``` **Measurement DAG:** | Primitive | What it does | |---|---| | `K.psf.coronagraph` | K · psf · coronagraph operator | | `S.speckle.reference` | S · speckle · reference operator | | `int.temporal` | Detector accumulates flux over the exposure window | ## 🔬 3. Physics Fingerprint | Property | Value | |---|---| | Domain | Astronomy | | Sub domain | High-contrast imaging | | Carrier | photon | | Problem class | linear_inverse | | Solution space | 2D_companion_flux | | Noise model | shot_poisson | | Integration axis | focal_plane | | Difficulty delta | 3 | | L dag | 3.2 | ## 📡 4. Measurement Model Existence of the recovered 2D_companion_flux is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 100); speckle_evolution_rate dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Shot poisson sets the irreducible data-fidelity floor. | Metric | Value | |---|---| | Metric | contrast_5sigma_dB | | Secondary | companion_SNR | ## 📏 5. Operating Range (Ω) **Center problem class:** `linear_inverse` · **Forward operator:** `coronagraphic_psf_subtraction` **Center point:** | Parameter | Unit | Value | |---|---|---| | H | px | 512 | | W | px | 512 | | N frames | — | 30 | | Contrast ratio | — | 1e-05 | | Speckle lifetime s | s | 60 | **Allowed bounds:** | Parameter | Unit | Range | |---|---|---| | H | px | 128 – 2048 | | W | px | 128 – 2048 | | N frames | — | 10 – 200 | | Contrast ratio | — | 1e-08 – 0.0001 | | Speckle lifetime s | s | 10 – 300 | ## 🎯 6. Tolerance (ε) **Center tolerance:** -5.0 contrast_5sigma_dB | Metric | Range | |---|---| | Contrast 5sigma db | -8.0 – -3.0 | ## ⚖ 7. Hardness Function Hardness scales as **`epsilon_fn`** on **contrast_5sigma_dB**, with κ = `10000.0` and δ = `3`. ## 💾 8. Reference Dataset - **primary** · weight 1.0 · IPFS _(not pinned yet)_ ## 9. On-chain Registration - **Chain hash:** `0x5fd0101d95ec991dcf6184dfbb55d3640b660b9f543f09c2cdd9406356cd15c7` - **Chain tx hash:** `0xdb0dbfadf6eb29970fd5919cfb79a48e07c70435ce44d46c8fa20f9832482d0f` - **Chain block:** `41554243` --- ## File Mapping This bundle consists of: `L1-166.md`, `L1-166.json`. | File | Role | How to regenerate | |------|------|-------------------| | `L1-166.md` | Source of truth — edit this | Human or LLM | | `L1-166.json` | Structured metadata for the registry | LLM regenerates from the sections above | **Prompt for your LLM after editing this Markdown:** > Read the attached Markdown. Regenerate the sibling `.json` so every field matches. > Preserve the schema documented in the rows above. > Output each file in its own fenced code block tagged with the filename. > Output only the JSON object. _This Markdown was auto-synthesized from the catalog row for `L1-166`._ _Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._

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Read the attached Markdown (L1-166.md).
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L2-166-001 Stellar Coronagraphy PSF Subtraction — Nominal + Mismatch Specs

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📋 JSON metadata

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  "chain_block": 41554243,
  "chain_hash": "0x5fd0101d95ec991dcf6184dfbb55d3640b660b9f543f09c2cdd9406356cd15c7",
  "chain_tx_hash": "0xdb0dbfadf6eb29970fd5919cfb79a48e07c70435ce44d46c8fa20f9832482d0f",
  "domain": "Astronomy",
  "hardness_fn": {
    "delta": 3,
    "kappa": 10000.0,
    "metric": "contrast_5sigma_dB",
    "type": "epsilon_fn"
  },
  "initiator_dataset": [
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      "license_hash": null,
      "name": "primary",
      "weight": 1.0
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  "observable_profile": {
    "metric": "contrast_5sigma_dB",
    "regime": "Existence of the recovered 2D_companion_flux is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 100); speckle_evolution_rate dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Shot poisson sets the irreducible data-fidelity floor.",
    "secondary": "companion_SNR"
  },
  "physics_fingerprint": {
    "L_DAG": 3.2,
    "carrier": "photon",
    "difficulty_delta": 3,
    "domain": "Astronomy",
    "integration_axis": "focal_plane",
    "noise_model": "shot_poisson",
    "primitives": [
      "K.psf.coronagraph",
      "S.speckle.reference",
      "int.temporal"
    ],
    "problem_class": "linear_inverse",
    "sensing_mechanism": "coronagraphic_psf_subtraction",
    "solution_space": "2D_companion_flux",
    "sub_domain": "High-contrast imaging",
    "title": "Stellar Coronagraphy PSF Subtraction"
  },
  "size_tiers": {
    "allowed_forward_operators": [
      "coronagraphic_psf_subtraction"
    ],
    "allowed_omega_dimensions": [
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      "W",
      "N_frames",
      "contrast_ratio",
      "speckle_lifetime_s"
    ],
    "allowed_problem_classes": [
      "linear_inverse"
    ],
    "center_spec": {
      "epsilon_fn_center": "-5.0 contrast_5sigma_dB",
      "forward_operator": "coronagraphic_psf_subtraction",
      "input_format": "measurement_only",
      "omega": {
        "H": 512,
        "N_frames": 30,
        "W": 512,
        "contrast_ratio": 1e-05,
        "speckle_lifetime_s": 60.0
      },
      "problem_class": "linear_inverse"
    },
    "epsilon_bounds": {
      "contrast_5sigma_dB": [
        -8.0,
        -3.0
      ]
    },
    "omega_bounds": {
      "H": [
        128,
        2048
      ],
      "N_frames": [
        10,
        200
      ],
      "W": [
        128,
        2048
      ],
      "contrast_ratio": [
        1e-08,
        0.0001
      ],
      "speckle_lifetime_s": [
        10,
        300
      ]
    }
  },
  "staked_pwm": 0.0,
  "status": "testnet",
  "sub_domain": "High-contrast imaging",
  "title": "Stellar Coronagraphy PSF Subtraction"
}

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