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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"

19666 results found.

  1. GRB 080603B: optical observations in MAO
  2. GRB 080603B: optical observations in CrAO
  3. GRB 080710: TLS observations, steepening afterglow decay
  4. GRB 080702B: Swift XRT confirmation of the afterglow
  5. GRB 080710, Swift-BAT refined analysis
  6. GRB 080710: Swift-XRT refined analysis
  7. GRB080710: Swift/UVOT observations
  8. GRB 080710: Enhanced Swift-XRT position
  9. UVOT white band observations of GRB080710
  10. GRB 080710: KAIT OA candidate
  11. GRB 080710: Swift XRT position
  12. GRB 080710: Swift detection of a burst
  13. GRB 080707: possible break in the X-rays
  14. New Swift-XRT GRB products available online.
  15. GRB 080707: GROND Confirmation of the Optical Afterglow
  16. UVOT observations of GRB080707
  17. GRB 080707, Swift-BAT refined analysis
  18. GRB 080707: Swift XRT refined analysis
  19. GRB 080707: Enhanced Swift-XRT position
  20. GRB 080707: GROND Detection of the Optical Afterglow Candidate
  21. GRB 080707: Swift detection of a burst
  22. Refined analysis of Swift Trigger 316063, is IGR J08408-4503
  23. Trigger 316063: Swift detection of a transient
  24. GRB 080703: GROND Upper Limits
  25. GRB 080702B: GROND Upper Limits
  26. GRB 080703: Swift-XRT refined analysis
  27. GRB 080703: UVOT Follow-Up Observation
  28. GRB 080703: Enhanced Swift-XRT position
  29. GRB 080703, Swift-BAT refined analysis
  30. GRB 080702B Swift-BAT refined analysis
  31. GRB 080703: Swift detection of a burst with optical afterglow
  32. GRB 080703A: ROTSE-III Detection of Optical Counterpart
  33. Swift/UVOT observation of GRB080702A
  34. GRB 080702B: Swift XRT and UVOT observations
  35. GRB 080701A: Early RAPTOR optical limits
  36. Swift Trigger 315630: Swift/UVOT Upper Limits
  37. GRB 080702A, Swift-BAT refined analysis
  38. GRB 080702A: Swift-XRT Team refined analysis
  39. GRB 080702B : Burst detected in BAT during Swift slew
  40. GRB 080702A: Enhanced Swift-XRT position
  41. Swift Trigger 315630: TLS R-band observation
  42. Swift Trigger 315630: Probably not a GRB
  43. GRB 080702: Swift detection of a short burst
  44. GRB 080701: Swift-XRT refined analysis
  45. TLS I-Band Observation of GRB 080701A
  46. GRB 080701A: Swift/UVOT Upper Limits
  47. GRB 080701: Enhanced Swift-XRT position
  48. GRB 080701A, Swift-BAT refined analysis
  49. Trigger 315630: Swift detection of a possible burst
  50. GRB 080701: Swift-XRT Prompt Analysis
  51. GRB 080701: Swift detection of a burst
  52. GRB 080623: Suzaku WAM observation of the prompt emission
  53. GRB 080625: Swift/UVOT Follow-Up Observations
  54. GRB 080625:Swift-XRT detection of the afterglow
  55. GRB 080625: Swift/UVOT Detection of an Optical Afterglow
  56. GRB 080623: GROND upper limits
  57. GRB080623: Swift UVOT followup observations
  58. GRB 080623: Swift-XRT refined analysis
  59. GRB 080623, Swift-BAT refined analysis
  60. GRB 080623: Enhanced Swift-XRT position
  61. GRB 080623: TAROT La Silla observatory optical observations
  62. GRB 080623: Swift/UVOT Non-Detection of an Optical Afterglow
  63. GRB 080623: Swift XRT prompt analysis
  64. GRB 080623: Swift detection of a burst
  65. Swift trigger 314975 is not a GRB
  66. Swift-BAT trigger 314975 possible burst
  67. GRB080607: optical observation
  68. GRB 080603b: optical observation
  69. GRB 070809: Putative host galaxy and redshift
  70. Konus-Wind observation of GRB 080613B
  71. GRB 080613A: Swift-XRT detection of the afterglow
  72. GRB080613A: Swift/UVOT Upper Limits
  73. GRB 080613B: GROND Upper Limits
  74. GRB080613B: Swift/UVOT Upper Limits
  75. GRB 080613B, Swift-BAT refined analysis
  76. GRB 080613B: Swift-XRT refined analysis
  77. GRB 080613B: Swift detection of a burst
  78. GRB 080603b: optical observation
  79. Swift observations of BAT Slew Survey event (Trigger=010)
  80. GRB 080603A: final Swift-XRT observations.
  81. GRB 080607: AGILE-MCAL observation of the prompt emission
  82. GRB 080603B - TLS 2nd Epoch: Another Break
  83. GRB 080605: TLS 3rd Epoch - Source Confusion
  84. Konus-Wind observation of GRB 080607
  85. GRB080607: RTT150 optical observations
  86. GRB 080607: Swift-XRT refined analysis
  87. Swift/UVOT Observations of GRB080607
  88. GRB 080605: optical observations
  89. GRB 080607 KAIT observations
  90. Konus-Wind observation of GRB 080605
  91. GRB 080607: Enhanced Swift-XRT position
  92. GRB 080607, Swift-BAT refined analysis
  93. GRB 080605: GROND 2nd epoch observations
  94. GRB 080607: Swift detection of a burst with optical afterglow
  95. GRB 080607: ROTSE-III Detection of Optical Counterpart
  96. GRB 080605: Swift-UVOT refined analysis
  97. GRB 080604: VLA radio upper limit
  98. GRB 080605, Swift-BAT refined analysis
  99. GRB 080603B: VLA radio upper limit
  100. GRB 080605, Swift-BAT refined analysis

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