Pith Number

pith:HYXECVBP

pith:2007:HYXECVBP4VRDN2VWBFZ6KDTB4Z

not attested not anchored not stored refs pending

Freshly Formed Dust in the Cassiopeia A Supernova Remnant as Revealed by the Spitzer Space Telescope

A. Tappe, H. Gomez, J. A. Ennis, J. D. Smith, J. Rho, L. Rudnick, T. DeLaney, T. Kozasa, W. T. Reach

arxiv:0709.2880 v1 · 2007-09-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HYXECVBP4VRDN2VWBFZ6KDTB4Z}

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	2026-07-04T17:05:45.868705Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e2e41542fe56236eab60973e50e61e660ae292fb8d90de81326d9c70056b187

Aliases

arxiv: 0709.2880 · arxiv_version: 0709.2880v1 · doi: 10.48550/arxiv.0709.2880 · pith_short_12: HYXECVBP4VRD · pith_short_16: HYXECVBP4VRDN2VW · pith_short_8: HYXECVBP

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/HYXECVBP4VRDN2VWBFZ6KDTB4Z \
  | 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: 3e2e41542fe56236eab60973e50e61e660ae292fb8d90de81326d9c70056b187

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63183f56f66b22e2965a3ceda6ac81fc9adc62c3cfd0b616e2dc6e6706cc214a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-09-18T16:49:13Z",
    "title_canon_sha256": "5b71a47ae2b91fe013a80ce98cb0915183e20d588ceca2327a53df6ab840a8a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.2880",
    "kind": "arxiv",
    "version": 1
  }
}