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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"

19662 results found.

  1. GRB 130603B: Swift-XRT refined Analysis
  2. GRB 130603B: Swift-BAT Spectral lag analysis
  3. GRB 130603B: Swift-BAT refined analysis
  4. GRB 130603A: Swift-XRT refined Analysis
  5. GRB 130603B: Enhanced Swift-XRT position
  6. Swift/UVOT observations of GRB130603A
  7. GRB 130603A: Enhanced Swift-XRT position
  8. GRB 130603A: Swift-BAT refined analysis
  9. GRB 130603B: Swift detection of a bright short burst
  10. GRB 130603A: Swift-XRT observations
  11. GRB 130603A: Swift-XRT and Swift-UVOT detections
  12. GRB 130603A: Swift detection of a burst
  13. GRB 130529A: GROND upper limits
  14. GRB 130528A: Fermi GBM detection
  15. GRB 130529A: Swift/UVOT Upper Limits
  16. GRB 130527A: Suzaku WAM observation of the prompt emission
  17. GRB 130529A: Swift-BAT refined analysis
  18. GRB 130518A: Suzaku WAM observation of the prompt emission
  19. GRB 130529A: Swift-XRT refined Analysis
  20. GRB 130529A: Enhanced Swift-XRT position
  21. Konus-Wind observation of GRB 130528A
  22. GRB 130528A: Swift/UVOT Upper Limits
  23. Konus-Wind observation of GRB 130527A
  24. GRB 130529A: Prompt enhanced Swift-XRT position
  25. GRB 130528A: Swift-BAT refined analysis
  26. GRB 130529A: Swift detection of a burst
  27. GRB 130528A: Swift-XRT refined Analysis
  28. GRB 130527A: Swift/UVOT Upper Limits
  29. GRB 130528A: Enhanced Swift-XRT position
  30. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  31. GRB 130528A: Swift detection of a burst
  32. GRB 130527A: RATIR Optical and NIR Observations
  33. GRB 130527A: Swift-BAT refined analysis
  34. GRB 130527A: Swift-XRT refined Analysis
  35. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  36. GRB 130527A: Enhanced Swift-XRT position
  37. GRB 130527A: Prompt enhanced Swift-XRT position
  38. GRB 130527A: Swift detection of a bright burst
  39. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  40. Swift Trigger 556533 is not an astrophysical event
  41. Swift Trigger 556533 is probably not an astrophysical event
  42. GRB 130521A: Skynet/PROMPT observations
  43. GRB 130514B: Further Swift-XRT Observations
  44. GRB 130518B, Swift-BAT refined analysis
  45. GRB 130521A, Swift-BAT refined analysis
  46. GRB 130521A: TAROT La Silla observatory optical observations
  47. GRB 130521A: Swift detection of a burst
  48. Swift XRT observation of GRB 130518B
  49. GRB 130515A: Suzaku WAM observation of the prompt emission
  50. GRB 130518A: 10.4m GTC/OSIRIS redshift
  51. Correction to GCN Circular 14682 (GRB 130518B)
  52. GRB 130518B found in ground analysis of Swift-BAT data
  53. GRB 130518A: Confirmation of the X-ray afterglow.
  54. GRB 130518A: P60 Afterglow Observations
  55. GRB 130518A: Swift XRT and UVOT possible afterglow
  56. Konus-Wind observation of GRB 130518A
  57. GRB 130518A Swift-BAT position from ground analysis
  58. GRB 130518A: Fermi LAT detection
  59. GRB 130515A: Further Gemini Observations
  60. Konus-Wind observation of GRB 130515A
  61. GRB 130514B: RATIR Optical and NIR Observations
  62. GRB 130515A: Fermi GBM detection
  63. GRB 130427A: Skynet detections of a possible supernova
  64. GRB 130515A: Swift-XRT refined Analysis
  65. GRB 130515A: Swift/UVOT Upper Limits
  66. GRB 130514B Swift-BAT observations
  67. GRB 130515A: Swift-BAT refined analysis
  68. GRB 130515A: Gemini/GMOS Observations
  69. GRB 130515A: GROND Observations
  70. GRB 130515A: Enhanced Swift-XRT position
  71. GRB 130511A: SSO 2.3m observation
  72. GRB 130514B: Swift-XRT Observations
  73. GRB 130515A: Swift detection of a short burst
  74. GRB 130514A: Swift-XRT refined Analysis
  75. GRB 130514A: Skynet/PROMPT/DSO Detections
  76. GRB 130513A: Bassano Bresciano optical upper limit
  77. GRB 130427A: optical observations
  78. GRB 130514A: RATIR Optical and NIR Observations
  79. GRB 130513A: RATIR Optical and NIR Observations
  80. GRB 130513A: Swift/UVOT Upper Limits
  81. GRB 130514A: Swift/UVOT Upper Limits
  82. GRB 130514A: Enhanced Swift-XRT position
  83. GRB 130514A: Swift-BAT refined analysis
  84. GRB 130513A: Swift-XRT detection of the afterglow.
  85. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  86. GRB 130514A: Swift detection of a burst
  87. GRB130508A: MASTER-Net optical observations
  88. GRB 130511A: Swift-XRT refined Analysis
  89. GRB 130511A, Swift-BAT refined analysis
  90. GRB 130511A: Enhanced Swift-XRT position
  91. GRB 130511A: Gemini-North Redshift
  92. GRB 130511A: Swift detection of a burst with an optical counterpart
  93. GRB 130508A: Swift/UVOT Upper Limits
  94. GRB 130508A: RATIR Optical and NIR Observations
  95. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  96. GRB 130508A, Swift-BAT refined analysis
  97. GRB130508A: BOOTES-3 optical limit
  98. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  99. GRB 130508A: Swift detection of a probable burst
  100. GRB 130505B: Further Swift observations

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