Pith Number

pith:XEXHBXCD

pith:2019:XEXHBXCD3SNQAGZB6VDYBUKXVP

not attested not anchored not stored refs pending

Peering through SPHERE Images: A Glance at Contrast Limitations

Arthur Vigan (LAM), Faustine Cantalloube (IPAG), Julien Milli (ESO), Kjetil Dohlen (LAM), Wolfgang Brandner (MPIA)

arxiv:1907.03624 v1 · 2019-07-08 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XEXHBXCD3SNQAGZB6VDYBUKXVP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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.

Receipt and verification

First computed	2026-05-17T23:41:14.152074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b92e70dc43dc9b001b21f54780d157abe3355867b8d1ba0e45f657964ccd0cd8

Aliases

arxiv: 1907.03624 · arxiv_version: 1907.03624v1 · doi: 10.48550/arxiv.1907.03624 · pith_short_12: XEXHBXCD3SNQ · pith_short_16: XEXHBXCD3SNQAGZB · pith_short_8: XEXHBXCD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/XEXHBXCD3SNQAGZB6VDYBUKXVP \
  | 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: b92e70dc43dc9b001b21f54780d157abe3355867b8d1ba0e45f657964ccd0cd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ff99f6d1a9a5eee21552a1b240cd60e13deaea8770ada0616833df5c2a7d390",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2019-07-08T14:01:52Z",
    "title_canon_sha256": "28fbff881fbb9aba4140f1b162b2ca94c63e17972a2440705ead8e6aa0a78741"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.03624",
    "kind": "arxiv",
    "version": 1
  }
}