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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"

21925 results found.

  1. GRB 131224A: 5.8 GHz VLA observations
  2. GRB 131227A: Swift-XRT refined Analysis
  3. GRB 131227A: Xinglong optical observations
  4. GRB 131227A: Swift/UVOT Upper Limits
  5. Konus-Wind observation of GRB 131226A
  6. GRB 131227A: Enhanced Swift-XRT position
  7. GRB 131227A: Swift detection of a burst
  8. GRB 131224A: Swift/UVOT Upper Limits
  9. GRB 131225A: MASTER-Net optical observations
  10. GRB 131216A: Suzaku WAM observation of the prompt emission
  11. GRB 131224A: Swift-XRT observation
  12. GRB 131224A: MASTER-Net early optical observations
  13. GRB 131218A: GROND Upper Limits
  14. GRB 131218A: Swift XRT and UVOT observations
  15. GRB 131218A: Zadko observatory - Gingin optical candidate
  16. GRB 131218A: TAROT La Silla observatory optical observations
  17. IPN Triangulation of GRB 131216A
  18. GRB 131216A: Fermi GBM observation
  19. GRB 131216A: Fermi-LAT detection of a burst
  20. Trigger 581129: Swift-BAT triggered on noise
  21. GRB 131205A: GROND confirmation of afterglow
  22. INTEGRAL Weak trigger #6403: AROMA-N Optical Observation
  23. GRB 131209A: Swift XRT and UVOT observations
  24. Konus-Wind observation of GRB 131209A
  25. IPN Triangulation of GRB 131209A
  26. GRB 131209A: Fermi-LAT detection of a burst
  27. GRB131202A : GROND observations
  28. GRB131205A : GROND Observations
  29. GRB 131205A: Swift-BAT refined analysis
  30. GRB 131205A: Swift/UVOT Upper Limits
  31. GRB 131205A: Enhanced Swift-XRT position
  32. GRB 131205A: Zadko observatory - Gingin optical observations
  33. GRB 131205A: Swift detection of a burst
  34. GRB 131202A: theoretical estimation of the redshift
  35. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  36. GRB 131127B: rejection of optical counterpart candidates
  37. GRB 131202A: Swift/UVOT Upper Limits
  38. GRB 131202A: RATIR Optical and NIR Observations
  39. GRB 131202A: Enhanced Swift-XRT position
  40. GRB 131202A: Bassano Bresciano Observatory optical upper limit
  41. GRB 131202A: Tautenburg observations
  42. GRB 060614: theoretical derivation of the redshift and need for deeper search of the host galaxy
  43. GRB 131202A: Swift detection of a burst
  44. GRB 131127B: Bassano Bresciano Observatory optical observations of iPTF13ecv
  45. GRB 131128A: Bassano Bresciano Observatory optical upper limit
  46. GRB 131127A: RATIR Rejection of High-z Candidate
  47. GRB 131125A: MASTER-Net very early optical observations
  48. Konus-Wind observation of GRB 131126A
  49. GRB 131127A: CQUEAN riz Observation
  50. GRB 131128A: GROND observations of the afterglow
  51. GRB 131128A: Swift/UVOT Detection
  52. GRB 131128A: AROMA-N Optical Observation
  53. GRB 131127B: Bassano Bresciano Observatory optical observations
  54. GRB 131128A: T100 observations
  55. GRB 131128A: Enhanced Swift-XRT position
  56. GRB 131128A: MASTER-Net optical observations
  57. GRB 131127B: MASTER-Net optical observations
  58. GRB 131128A: Swift detection of a burst
  59. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  60. Konus-Wind observation of GRB 131127B
  61. GRB 131127A: Swift/UVOT Upper Limits
  62. GRB 131127A: AROMA-N Optical Observation
  63. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  64. GRB 131127A, Swift-BAT refined analysis
  65. GRB 131127A: Enhanced Swift-XRT position
  66. GRB 131127A: Mondy optical upper limit
  67. GRB 131127A: Nanshan optical upper limit
  68. GRB 131127A: MASTER-NET optical observations
  69. GRB 131127A: Swift detection of a burst
  70. GRB 131122A: Swift/UVOT Upper Limits
  71. GRB 131122A: Swift-XRT observations
  72. GRB 131122A: i-band observations from NOT
  73. GRB 131122A: Nanshan optical upper limit
  74. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  75. Konus-Wind observation of GRB 131118A
  76. IPN Triangulation of GRB 131118A
  77. GRB 131030A, Optical Observations
  78. GRB 131117A: TAROT La Silla observatory optical observations
  79. GRB 131117A: Swift/UVOT Detection
  80. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  81. GRB 131117A: Enhanced Swift-XRT position
  82. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  83. GRB 131117A: Swift detection of a burst
  84. GRB 131110A: Swift-XRT and UVOT upper limits
  85. GRB 131031A: Mondy optical observations
  86. GRB 131108A: ISON Blagoveshensk upper limit
  87. GRB 131108A: optical observations
  88. GRB 131108A: Continued RATIR Optical and NIR Observations
  89. GRB 131030A: MITSuME Akeno Optical observation
  90. Konus-Wind observation of GRB 131108A
  91. GRB 131108A: AGILE/GRID observation
  92. GRB 131108A: Swift/UVOT Detection
  93. GRB 131108A: RATIR Optical and NIR Observations
  94. GRB 131108A: Swift-XRT observations
  95. GRB 131108A: TAROT-Calern optical observation
  96. GRB 131108A: Fermi-LAT refined analysis
  97. GRB 131108A: NOT optical observations
  98. GRB 131108A: 1.23m CAHA optical candidate
  99. GRB 131030A: RATIR Optical and NIR Upper Limits
  100. GRB 131030A: Continued RATIR Optical and NIR Observations

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