NGC 7003 (English Wikipedia)

Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.

caltech.edu

Giovanelli, Riccardo; Haynes, Martha P. (1993-04-01). "A Survey of the Pisces-Perseus Supercluster. VI. The Declination Zone +15.5 degrees to n+21.5 degrees". The Astronomical Journal. 105: 1271. Bibcode:1993AJ....105.1271G. doi:10.1086/116508. ISSN 0004-6256.
Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.

Rojas, Sebastián García. "Galaxy NGC 7003 Deep Sky Objects Browser". DSO Browser. Archived from the original on 2017-05-24. Retrieved 2017-04-15.

Giovanelli, Riccardo; Haynes, Martha P. (1993-04-01). "A Survey of the Pisces-Perseus Supercluster. VI. The Declination Zone +15.5 degrees to n+21.5 degrees". The Astronomical Journal. 105: 1271. Bibcode:1993AJ....105.1271G. doi:10.1086/116508. ISSN 0004-6256.
Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.

M. Giovannini, E. Mazzoni, G. Petroni, and M. Rossi, Borgo a Mozzano, Fabrizio Ciabattari, S. Donati (10 June 2011). "SUPERNOVA 2011dk IN NGC 7003 = PSN J21004220+1748220". SUPERNOVA 2011dk IN NGC 7003 = PSN J21004220+1748220. Retrieved 2017-06-19.{{cite web}}: CS1 maint: multiple names: authors list (link)

"2011dk - The Open Supernova Catalog". sne.space. Archived from the original on 2017-10-14. Retrieved 2017-06-20.

Rojas, Sebastián García. "Galaxy NGC 7003 Deep Sky Objects Browser". DSO Browser. Archived from the original on 2017-05-24. Retrieved 2017-04-15.
"2011dk - The Open Supernova Catalog". sne.space. Archived from the original on 2017-10-14. Retrieved 2017-06-20.

Giovanelli, Riccardo; Haynes, Martha P. (1993-04-01). "A Survey of the Pisces-Perseus Supercluster. VI. The Declination Zone +15.5 degrees to n+21.5 degrees". The Astronomical Journal. 105: 1271. Bibcode:1993AJ....105.1271G. doi:10.1086/116508. ISSN 0004-6256.
Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.