Pith Number

pith:SQZJPNX2

pith:2009:SQZJPNX25ZQD4SDYMOE2QLPX3L

not attested not anchored not stored refs pending

Optical Observations of the Rapidly Expanding Type Ia Supernova 2007gi

A. V. Filippenko, J. Deng, J. Li, J. M. Silverman, L. Wang, M. Ganeshalingam, M. Zhai, P. J. Brown, R. Shang, T. Li, T. N. Steele, T. Zhang, W. Li, X. Wang, X. Zhou, Y. Qiu

arxiv:0910.1913 v1 · 2009-10-10 · astro-ph.SR · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SQZJPNX25ZQD4SDYMOE2QLPX3L}

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	2026-05-18T02:11:24.917817Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

943297b6faee603e48786389a82df7daf16b4df8087464da811e65ddbb993cdd

Aliases

arxiv: 0910.1913 · arxiv_version: 0910.1913v1 · doi: 10.48550/arxiv.0910.1913 · pith_short_12: SQZJPNX25ZQD · pith_short_16: SQZJPNX25ZQD4SDY · pith_short_8: SQZJPNX2

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/SQZJPNX25ZQD4SDYMOE2QLPX3L \
  | 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: 943297b6faee603e48786389a82df7daf16b4df8087464da811e65ddbb993cdd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "203fe40e865e16141869cf6ff236afcad13b3fb371afdf12dadc54b09614f4bb",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-10-10T11:26:33Z",
    "title_canon_sha256": "82400efff441e2778737a201a4fe9e16efbd8c322c42164420ba9c4aeb58c593"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.1913",
    "kind": "arxiv",
    "version": 1
  }
}