Pith Number

pith:EQREVKWB

pith:2025:EQREVKWBOK5DO3B5DISE4STGFB

not attested not anchored not stored refs resolved

Comparing cosmic shear nulling methods for Stage-IV surveys

Alex Hall, Naomi Clare Robertson

Nulling strategies can substantially reduce bias on S8 and dark energy parameters in cosmic shear measurements.

arxiv:2512.15604 v2 · 2025-12-17 · astro-ph.CO

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4 Citations open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We find that the nulling techniques considered can have a large impact on reducing the bias on S8 and Dark Energy parameters.

C2weakest assumption

The Fisher forecast model accurately represents the bias reduction from nulling without needing full end-to-end simulations or real data validation, and the assumed baryon feedback model matches reality.

C3one line summary

BNT, LUnul, and cross-correlation nulling methods reduce bias on S8 and dark energy parameters in cosmic shear Fisher forecasts, with LUnul most aggressive but at cost of precision.

References

1 extracted · 1 resolved · 0 Pith anchors

[1] arXiv:2404.06098 2022

Receipt and verification

First computed	2026-06-10T01:09:50.612753Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24224aaac172ba376c3d1a244e4a66284bf559219194bddec559458e18342ba9

Aliases

arxiv: 2512.15604 · arxiv_version: 2512.15604v2 · doi: 10.48550/arxiv.2512.15604 · pith_short_12: EQREVKWBOK5D · pith_short_16: EQREVKWBOK5DO3B5 · pith_short_8: EQREVKWB

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/EQREVKWBOK5DO3B5DISE4STGFB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 24224aaac172ba376c3d1a244e4a66284bf559219194bddec559458e18342ba9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62a95043590d35d6055bab1aba0ecead260ffe1119d601d60161fea50efa45f0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2025-12-17T17:12:43Z",
    "title_canon_sha256": "38009b05cc4355b02fd04394f8db35d52ad6ff4c06b259ce593e36cac2074ba2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.15604",
    "kind": "arxiv",
    "version": 2
  }
}