# PSR B1937+21

> star

**Wikidata**: [Q3107544](https://www.wikidata.org/wiki/Q3107544)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PSR_B1937+21)  
**Source**: https://4ort.xyz/entity/psr-b1937-21


## References

1. SIMBAD
2. Freebase Data Dumps. 2013
3. The NRAO VLA Sky Survey
4. The phase of the radio and X-ray pulses of PSR B1937+21