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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"

19611 results found.

  1. GRB080727C: RTT150 optical observations
  2. GRB 080727C: Swift detection of a burst
  3. Swift detection of XTE J1701-407
  4. GRB 080727B: Swift/UVOT Upper Limits
  5. BAT Trigger 318150 is not a GRB
  6. GRB 080727B: Swift-XRT refined analysis
  7. GRB 080727B, Swift-BAT refined analysis
  8. GRB 080727A, Swift-BAT refined analysis
  9. GRB 080727A: Swift-XRT refined analysis
  10. GRB080727A: Swift/UVOT Upper Limits
  11. GRB 080727B: Enhanced Swift-XRT position
  12. GRB 080727A: Enhanced Swift-XRT position
  13. GRB 080727B: Swift detection of a bright burst
  14. GRB 080727: Swift detection of a burst
  15. GRB 080725, Swift-BAT refined analysis
  16. GRB 080723A: optical upper limit
  17. GRB080723B: Swift/UVOT Upper Limits
  18. GRB 080725: Swift detection of a burst
  19. GRB 080723A: Swift/UVOT Upper Limits
  20. GRB 080723B - correction to flux conversion factor
  21. GRB 080723B - Swift-XRT refined analysis
  22. GRB 080723B - Swift-XRT position
  23. GRB 080723, Swift-BAT refined analysis
  24. GRB 080723A: Swift-XRT refined analysis
  25. GRB 080723: Enhanced Swift-XRT position
  26. GRB 080723: Swift detection of a burst
  27. TNG/DOLORES redshift for GRB080721
  28. GRB 080721: UVOT Follow-Up Observations
  29. Konus-Wind observation of GRB 080721
  30. GRB 080721: Swift-XRT refined analysis
  31. GRB 080721: Enhanced Swift-XRT position
  32. GRB 080721, Swift-BAT refined analysis
  33. GRB 080721: Swift/UVOT Photometric Redshift
  34. GRB 080721: Swift-XRT correct position
  35. GRB 080721: Swift detection of a burst with a bright optical counterpart.
  36. Retraction of Swift Trigger 317393
  37. Trigger 317393: Swift detection of a possible GRB
  38. Trigger 317205: Swift detection of an outburst from XTE J1701-407
  39. GRB 080714: GROND confirmation of the optical/NIR afterglow
  40. Konus-Wind observation of GRB 080714
  41. GRB 080714: Swift/UVOT Detection of an Optical Afterglow
  42. GRB 080714: Swift-XRT refined analysis
  43. GRB 080714: Enhanced Swift-XRT position
  44. GRB 080714: Swift-BAT refined analysis
  45. GRB 080714: Swift detection of a burst
  46. GRB 080603B: optical observations in MAO
  47. GRB 080603B: optical observations in CrAO
  48. GRB 080710: TLS observations, steepening afterglow decay
  49. GRB 080702B: Swift XRT confirmation of the afterglow
  50. GRB 080710, Swift-BAT refined analysis
  51. GRB 080710: Swift-XRT refined analysis
  52. GRB080710: Swift/UVOT observations
  53. GRB 080710: Enhanced Swift-XRT position
  54. UVOT white band observations of GRB080710
  55. GRB 080710: KAIT OA candidate
  56. GRB 080710: Swift XRT position
  57. GRB 080710: Swift detection of a burst
  58. GRB 080707: possible break in the X-rays
  59. New Swift-XRT GRB products available online.
  60. GRB 080707: GROND Confirmation of the Optical Afterglow
  61. UVOT observations of GRB080707
  62. GRB 080707, Swift-BAT refined analysis
  63. GRB 080707: Swift XRT refined analysis
  64. GRB 080707: Enhanced Swift-XRT position
  65. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  66. GRB 080707: Swift detection of a burst
  67. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  68. Trigger 316063: Swift detection of a transient
  69. GRB 080703: GROND Upper Limits
  70. GRB 080702B: GROND Upper Limits
  71. GRB 080703: Swift-XRT refined analysis
  72. GRB 080703: UVOT Follow-Up Observation
  73. GRB 080703: Enhanced Swift-XRT position
  74. GRB 080703, Swift-BAT refined analysis
  75. GRB 080702B Swift-BAT refined analysis
  76. GRB 080703: Swift detection of a burst with optical afterglow
  77. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  78. Swift/UVOT observation of GRB080702A
  79. GRB 080702B: Swift XRT and UVOT observations
  80. GRB 080701A: Early RAPTOR optical limits
  81. Swift Trigger 315630: Swift/UVOT Upper Limits
  82. GRB 080702A, Swift-BAT refined analysis
  83. GRB 080702A: Swift-XRT Team refined analysis
  84. GRB 080702B : Burst detected in BAT during Swift slew
  85. GRB 080702A: Enhanced Swift-XRT position
  86. Swift Trigger 315630: TLS R-band observation
  87. Swift Trigger 315630: Probably not a GRB
  88. GRB 080702: Swift detection of a short burst
  89. GRB 080701: Swift-XRT refined analysis
  90. TLS I-Band Observation of GRB 080701A
  91. GRB 080701A: Swift/UVOT Upper Limits
  92. GRB 080701: Enhanced Swift-XRT position
  93. GRB 080701A, Swift-BAT refined analysis
  94. Trigger 315630: Swift detection of a possible burst
  95. GRB 080701: Swift-XRT Prompt Analysis
  96. GRB 080701: Swift detection of a burst
  97. GRB 080623: Suzaku WAM observation of the prompt emission
  98. GRB 080625: Swift/UVOT Follow-Up Observations
  99. GRB 080625:Swift-XRT detection of the afterglow
  100. GRB 080625: Swift/UVOT Detection of an Optical Afterglow

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