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"

19662 results found.

  1. GRB 111225A: TAROT Calern observatory optical detection
  2. GRB 111225A: TAROT Calern observatory optical observations
  3. GRB 111225A: Swift detection of a burst with an optical counterpart
  4. GRB 111222A: Swift/UVOT Observations
  5. GRB 111222A: Swift-XRT observations
  6. IPN Triangulation of GRB 111222A (short/hard/intense)
  7. Trigger 510075 is not a GRB
  8. GRB 111215A: EVLA observations
  9. GRB111215A: CARMA Detection
  10. XRT GRB Catalogue now live and online
  11. GRB 111103B: optical upper limit
  12. GRB 110820A: optical observations in Maidanak observatory
  13. GRB 111103A: optical upper limit of Mt. Terskol observatory
  14. GRB 111215B: Suzaku WAM observation of the prompt emission
  15. GRB111215A: optical upper limit
  16. GRB 111215B: Swift/UVOT Upper Limits
  17. GRB 111215B: Swift-XRT observations
  18. GRB 111205A: Confirmation of X-ray Afterglow
  19. IPN Triangulation of GRB 111215B (long/intense)
  20. GRB 111215A: Swift/UVOT Upper Limits
  21. GRB 111215A: Swift-XRT refined Analysis
  22. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  23. GRB 111215A: Enhanced Swift-XRT position
  24. GRB 111215A: Swift-BAT refined analysis
  25. GRB 111215A: MASTER-Net optical prompt and follow up observations
  26. GRB 111215A, Optical Observations
  27. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  28. GRB 111215A: Swift detection of a burst
  29. GRB 111212A: GROND observations
  30. GRB 111211A: Swift/UVOT Detection
  31. GRB 111212A: Swift-XRT refined Analysis
  32. GRB 111211A: Swift/XRT target of opportunity observation
  33. GRB 111212A: Swift/UVOT Upper Limits
  34. GRB 111212A: Swift-BAT refined analysis
  35. GRB 111212A: Enhanced Swift-XRT position
  36. GRB 111212A: Swift-XRT observations
  37. GRB 111212A: Swift detection of a burst
  38. Konus-Wind observation of GRB 111209A
  39. GRB 111210A: GROND observations
  40. GRB 111210A: Swift-XRT refined Analysis
  41. GRB 111208A: Swift-XRT refined analysis
  42. GRB 111210A: Swift/UVOT Upper Limits
  43. GRB 111210A: Enhanced Swift-XRT position
  44. GRB 111210A: Swift-BAT refined analysis
  45. GRB 111210A: Swift detection of a burst
  46. GRB 111209A: VLT/X-shooter redshift
  47. GRB 111209A: GROND Afterglow observations
  48. GRB 111209A optical limit by "Pi of the Sky"
  49. GRB 111208A: Lightbuckets Optical Observations
  50. GRB 111209A: Swift-XRT refined Analysis
  51. GRB 111209A: Swift UVOT refined analysis
  52. GRB 111209A: Swift Burst of Interest
  53. GRB 111209A, Swift-BAT refined analysis
  54. GRB 111209A: Enhanced Swift-XRT position
  55. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  56. GRB 111209A: Faulkes Telescope North observations
  57. GRB 111209A: REM NIR detection
  58. GRB 111209A: TAROT La Silla observatory optical detection
  59. GRB 111209A: Swift detection of a long burst with an optical counterpart
  60. GRB 111208A: Swift XRT/UVOT observations
  61. GRB 111205A: Swift XRT Observations
  62. GRB 111207A found in ground analysis of BAT data
  63. GRB 111208A found in ground analysis of BAT data
  64. IPN Triangulation of GRB 111205A (long/hard/intense)
  65. GRB 111204A: GROND Observations
  66. GRB 111204A: Swift-XRT refined Analysis
  67. GRB 111204A, Swift-BAT refined analysis
  68. GRB 111022B: CrAO optical limit
  69. GRB 111204A: Swift/UVOT Upper Limits
  70. GRB 110921A: optical observations in Maidanak observatory
  71. GRB 111204A: MASTER optical observations
  72. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  73. GRB 111204A: Enhanced Swift-XRT position
  74. GRB 111123A: optical upper limit in CrAO
  75. GRB 111204A: Swift detection of a burst
  76. GRB 111201A: Confirmation of the X-ray afterglow
  77. GRB 111201A: Swift/UVOT Upper Limits
  78. GRB111201A: Swift-XRT observations
  79. GRB 111201A found in ground analysis of BAT data
  80. GRB 111121A: Suzaku WAM observation of the prompt emission
  81. GRB 111129A: Swift/UVOT Detection
  82. GRB 111129A: Swift-XRT refined Analysis
  83. GRB 111126A Circular #12599 erratum
  84. GRB 111129A: Swift-BAT refined analysis
  85. GRB 111129A: Enhanced Swift-XRT position
  86. GRB 111129A: Swift detection of a burst with an optical counterpart
  87. GRB 111126A found in ground analysis of BAT data
  88. GRB 111123A, Swift-BAT refined analysis
  89. GRB 111123A: Swift/UVOT Upper Limits
  90. GRB 111123A: Swift-XRT refined Analysis
  91. GRB 111123A: Enhanced Swift-XRT position
  92. GRB 111123A: Swift detection of a burst
  93. Konus-Wind observation of GRB 111121A
  94. GRB 111121A: Swift/UVOT Upper Limits
  95. GRB 111121A: Swift-XRT refined Analysis
  96. GRB 111121A: Swift-BAT refined analysis
  97. GRB 111121A: Enhanced Swift-XRT position
  98. GRB 111121A: Swift detection of a short hard burst
  99. GRB 111117A: Gemini Afterglow Limits
  100. GRB 111117A: optical upper limit in CrAO

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