Pith Number

pith:NQ26RTXU

pith:2009:NQ26RTXUN4FRH4GDFQY232ZGEI

not attested not anchored not stored refs pending

Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission

2) P. Giommi (3), (2) SLAC- CA, (3) ASI Science Data Center - Italy (4) Dipartimento di Fisica - Perugia, 5) ((1) CIFS - Torino, A. Tramacere (1, F. Verrecchia (3), G. Tosti (4, Italy, Italy), Italy (5) INFN Perugia - Perugia, M. Perri (3), USA

arxiv:0901.4124 v1 · 2009-01-26 · astro-ph.HE · 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{NQ26RTXUN4FRH4GDFQY232ZGEI}

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	2026-05-18T02:14:55.775527Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c35e8cef46f0b13f0c32c31adeb262202b2061519e2caec83fc85e7f76e4081

Aliases

arxiv: 0901.4124 · arxiv_version: 0901.4124v1 · doi: 10.48550/arxiv.0901.4124 · pith_short_12: NQ26RTXUN4FR · pith_short_16: NQ26RTXUN4FRH4GD · pith_short_8: NQ26RTXU

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/NQ26RTXUN4FRH4GDFQY232ZGEI \
  | 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: 6c35e8cef46f0b13f0c32c31adeb262202b2061519e2caec83fc85e7f76e4081

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e0a16c3cd0a59e5834b557e2f20d262b38d17a76c991b1b7e2640c00ea27a69",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-01-26T22:05:18Z",
    "title_canon_sha256": "da177d57ae39cc643b856704296b55387a0ec9bfd7b96b9a8feff28575a57517"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4124",
    "kind": "arxiv",
    "version": 1
  }
}