Pith Number

pith:XVN5DPGI

pith:2013:XVN5DPGIARDKR4EQXZ5U47DNJY

not attested not anchored not stored refs pending

Photometrically Triggered Keck Spectroscopy of Fermi BL Lac Objects

Alexei V. Filippenko, Michael S. Shaw, Roger W. Romani, S. Bradley Cenko, Weidong Li

arxiv:1308.2756 v1 · 2013-08-13 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XVN5DPGIARDKR4EQXZ5U47DNJY}

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	2026-05-18T01:48:16.031485Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd5bd1bcc80446a8f090be7b4e7c6d4e06e7547666ef8a47f7962996fe27b1e7

Aliases

arxiv: 1308.2756 · arxiv_version: 1308.2756v1 · doi: 10.48550/arxiv.1308.2756 · pith_short_12: XVN5DPGIARDK · pith_short_16: XVN5DPGIARDKR4EQ · pith_short_8: XVN5DPGI

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/XVN5DPGIARDKR4EQXZ5U47DNJY \
  | 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: bd5bd1bcc80446a8f090be7b4e7c6d4e06e7547666ef8a47f7962996fe27b1e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d186380ff3e587b013662c5c26f2a61c28adce4ec8049f68e0b93a09218627f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-08-13T04:57:15Z",
    "title_canon_sha256": "1476803a5b282a44557ecef66e63ffb9713758ebb301d1d8063ff287b4391858"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.2756",
    "kind": "arxiv",
    "version": 1
  }
}