Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

41910 results found.

  1. GRB 160408A: TLS Tautenburg observations
  2. GRB 160408A: Swift/UVOT Upper Limits
  3. GRB 160408A: Swift-XRT refined Analysis
  4. GRB 160408A: Fermi GBM detection
  5. GRB 160406A: Fermi GBM observation
  6. GRB 160408A: Swift-BAT refined analysis
  7. GRB 160408A: Gemini optical observations
  8. GRB 160408A: Swift detection of a short burst
  9. IPN Triangulation of GRB 160406A (short/hard)
  10. LIGO/Virgo G211117: 10.4m GTC follow-up of PS15dpn
  11. GRB 160401A: Swift-XRT observations
  12. GRB 160401A: Swift/UVOT Upper Limits
  13. GRB 160401A: Zadko observatory - Gingin optical observations
  14. GRB 160401A: LT observations
  15. GRB 160401A: Swift ToO observations
  16. GRB 160401A: MASTER-IAC prompt optical observations
  17. GRB 160401A: a long GRB detected by INTEGRAL
  18. GRB 160327A: Continued RATIR Optical and NIR Observations
  19. LIGO/Virgo G211117: LOFAR follow-up
  20. GRB 160324A: CALET Gamma-Ray Burst Monitor detection
  21. GRB 160327A: Early RAPTOR Limits
  22. GRB 160327A: JCMT SCUBA-2 sub-mm observation
  23. GRB 160327A: Imaging and spectroscopy from GTC
  24. Konus-Wind observation of GRB 160325A
  25. GRB 160327A: Continued RATIR Optical and NIR Observations
  26. GRB 160327A: KAIT optical afterglow confirmation
  27. GRB 160327A: Mondy optical upper limit
  28. GRB 160327A: Swift-BAT refined analysis
  29. GRB 160327A: Swift/UVOT Upper Limits
  30. GRB 160327A: Swift-XRT refined Analysis
  31. GRB 160327A: RATIR Optical and NIR Afterglow Detection
  32. GRB 160327A: Swift detection of a burst
  33. GRB 160325A, Swift-BAT refined analysis
  34. GRB 160325A: GROND Upper Limits
  35. GRB 160325A: Swift-XRT refined Analysis
  36. GRB 160325A: Further Swift/UVOT Observations
  37. GRB 160325A: afterglow confirmation
  38. GRB160325A Swift/UVOT Detection
  39. GRB 160325A: Fermi-LAT detection
  40. Swift Trigger 680457 is not a GRB
  41. LIGO/Virgo G211117: CALET GBM Observations
  42. GRB 160325A: Fermi GBM detection
  43. GRB160325A: REM NIR observations
  44. GRB 160325A: Swift detection of a burst
  45. Swift detects GX 301-2 in very high state
  46. Fermi Gamma-ray Burst Monitor trigger 160323546 is not a GRB
  47. GRB 160321A: AbAO optical observations
  48. GRB 160321A: Possible RATIR Optical and NIR Detections
  49. GRB 160321A: Swift/UVOT Upper Limits
  50. GRB 160321A: Swift-BAT refined analysis
  51. GRB 160321A: Swift-XRT refined Analysis
  52. GRB 160316A: CALET Gamma-Ray Burst Monitor detection
  53. GRB 160321A: MASTER observations zero Galaxy latitude GRB
  54. GRB 160321A: Swift detection of a probable burst
  55. GRB 160310A: Terskol 2-m observations
  56. IPN Triangulation of GRB 160310A
  57. SGR 0755-2933, Swift-BAT refined analysis
  58. GRB 160131A: 15 GHz upper limits from AMI-LA
  59. GRB 160310A: A further Swift-XRT observation, no afterglow detected
  60. Swift detection of a likely new SGR: SGR 0755-2933
  61. GRB 160314A: Continued RATIR Optical and NIR Observations
  62. GRB 160313A: Mondy optical upper limit
  63. GRB 160314A: GROND optical/NIR observations
  64. GRB 160314A: ISON-Ussuriysk optical upper limit, updated photometry and correction of GCN 19184
  65. GRB 160314B: Fermi GBM observation
  66. GRB 160314B: Fermi-LAT detection
  67. GRB 160314A: RATIR Optical and NIR Observations
  68. GRB 160314A: Mondy optical observations
  69. GRB 160313A: Swift/UVOT Upper Limits
  70. GRB 160314A: VLT/X-shooter redshift
  71. GRB 160314A: NOT afterglow observations
  72. GRB 160314A: Swift-XRT refined Analysis
  73. GRB 160314A: Optical observations from OSN
  74. GRB 160314A: Swift-BAT refined analysis
  75. GRB 160314A: Swift/UVOT Detection
  76. GRB 160228A: GROND afterglow confirmation and X-shooter host candidate redshift
  77. GRB 160314A: ISON-Ussuriysk optical upper limit
  78. GRB 160314A: Weihai optical upper limit
  79. GRB 160314A: Swift detection of a burst
  80. GRB 160313A, Swift-BAT refined analysis
  81. Fermi GBM trigger 479509107/160312874 is not a GRB
  82. GRB 160313A: Chante-Perdrix Observatory optical observations
  83. GRB 160313A: MASTER-Net optical observations
  84. GRB 160313A: LT observations
  85. GRB 160313A: Swift-XRT refined Analysis
  86. GRB 160313A: TAROT Calern observatory optical observations
  87. GRB 160313A: RATIR Optical and NIR Observations
  88. GRB 160313A: SAO RAS observations
  89. GRB 160313A: Swift detection of a burst
  90. GRB 160310A: MASTER-Kislovods observations
  91. GRB 160310A: Further NOT observations
  92. GRB 160310A: Swift/UVOT Upper Limits
  93. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  94. GRB 160310A: RATIR Optical and NIR Observations
  95. GRB 160307A: CALET Gamma-Ray Burst Monitor detection of a possible short GRB
  96. GRB 160310A: NOT optical observations
  97. GRB 160310A: LCOGT-SAAO optical upper limits
  98. GRB 160310A: Swift-XRT observations
  99. GRB 160310A: Fermi GBM observation
  100. GRB 160303A: GTC imaging of possible host galaxy

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov