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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"

42548 results found.

  1. GRB 131205A: Enhanced Swift-XRT position
  2. GRB 131205A: Zadko observatory - Gingin optical observations
  3. GRB 131205A: Swift detection of a burst
  4. GRB 131127B: Bassano Bresciano Observatory,archival confirmation of iPTF13ecv
  5. GRB 131202A: theoretical estimation of the redshift
  6. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  7. GRB 131127B: rejection of optical counterpart candidates
  8. GRB 131126A: Fermi GBM observation
  9. GRB 131126A: iPTF upper limits on the afterglow of a short GRB
  10. GRB 090530: X-shooter redshift
  11. GRB 131127A: optically dark burst
  12. GRB 131202A, Swift-BAT refined analysis
  13. GRB 131202A: Swift/UVOT Upper Limits
  14. GRB 131202A: Swift-XRT refined Analysis
  15. GRB 131202A: RATIR Optical and NIR Observations
  16. GRB 131202A: Fermi GBM Detection
  17. GRB 131202A: Enhanced Swift-XRT position
  18. GRB 131202A: Bassano Bresciano Observatory optical upper limit
  19. GRB 131202A: Tautenburg observations
  20. GRB 131202A : XMM-Newton planned observation
  21. GRB 060614: theoretical derivation of the redshift and need for deeper search of the host galaxy
  22. GRB 131202A: Swift detection of a burst
  23. GRB 131127B: Bassano Bresciano Observatory optical observations of iPTF13ecv
  24. GRB 131122A: Swift-XRT Further Observation
  25. GRB 131128A: Bassano Bresciano Observatory optical upper limit
  26. GRB 131127A: RATIR Rejection of High-z Candidate
  27. GRB 131128A; Fermi GBM observation
  28. GRB 131125A: MASTER-Net very early optical observations
  29. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  30. Konus-Wind observation of GRB 131126A
  31. IPN Triangulation of GRB 131126A (short/hard)
  32. Konus-Wind observation of GRB 131125A
  33. GRB 131127A: CQUEAN riz Observation
  34. GRB 131128A: GROND observations of the afterglow
  35. GRB 131128A: Swift/UVOT Detection
  36. GRB 131128A: AROMA-N Optical Observation
  37. GRB 131127B: Bassano Bresciano Observatory optical observations
  38. GRB 131128A: Swift-XRT refined Analysis
  39. GRB 131128A: Kanata/HOWPol optical observation
  40. GRB 131128A: T100 observations
  41. GRB 131128A: Swift-BAT refined analysis
  42. GRB 131128A: Enhanced Swift-XRT position
  43. GRB 131128A: Nanshan afterglow confirmation
  44. GRB 131128A: MASTER-Net optical observations
  45. GRB 131128A: Nanshan afterglow candidate
  46. GRB 131127B: MASTER-Net optical observations
  47. GRB 131128A: Swift detection of a burst
  48. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  49. GRB 131127B: Nanshan optical observations
  50. Konus-Wind observation of GRB 131127B
  51. IPN Triangulation of GRB 131127B
  52. GRB 131127B: Fermi GBM detection
  53. GRB 131127A: Swift/UVOT Upper Limits
  54. GRB 131127A: AROMA-N Optical Observation
  55. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  56. Fermi407254341: iPTF optical afterglow candidates
  57. GRB 131127A: Swift-XRT refined Analysis
  58. GRB 131127A. 1.5m OSN optical limit
  59. GRB 131127A, Swift-BAT refined analysis
  60. GRB 131127A: Enhanced Swift-XRT position
  61. GRB 131127A: Mondy optical upper limit
  62. GRB 131127A: Nanshan optical upper limit
  63. GRB 131127A: MASTER-NET optical observations
  64. GRB 131127A: Swift detection of a burst
  65. GRB 131122A: Swift/UVOT Upper Limits
  66. GRB 131122A: Upper limit from NOT imaging
  67. GRB 131122A: Swift-XRT observations
  68. GRB 131122A: i-band observations from NOT
  69. GRB 131122A: Nanshan optical upper limit
  70. GRB 131122A: a long GRB detected with INTEGRAL
  71. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  72. GRB 131120A, Swift-BAT refined analysis
  73. Konus-Wind observation of GRB 131118A
  74. GRB 131120A: Swift detection of a burst
  75. GRB 131118A: Fermi GBM detection
  76. GRB 131108A: VLA Observations
  77. GRB 131030A, Optical Observations
  78. GRB 131117A, Swift-BAT refined analysis
  79. GRB 131117A: TAROT La Silla observatory optical observations
  80. GRB 131117A: Swift/UVOT Detection
  81. GRB 131117A: Swift-XRT refined Analysis
  82. GRB 131117A: VLT/X-shooter redshift
  83. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  84. GRB 131117A: Enhanced Swift-XRT position
  85. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  86. GRB 131117A: Swift detection of a burst
  87. GRB 130925A: HST imaging
  88. GRB 131110A: Swift-XRT and UVOT upper limits
  89. GRB 131110A BAT refined analysis
  90. GRB 131031A: Mondy optical observations
  91. GRB 131108A: ISON Blagoveshensk upper limit
  92. GRB 131108A: optical observations
  93. GRB 131110A found in ground analysis of BAT slew event data
  94. GRB 131108A: Continued RATIR Optical and NIR Observations
  95. GRB 131030A: MITSuME Akeno Optical observation
  96. Konus-Wind observation of GRB 131108A
  97. GRB 131108A: AGILE/GRID observation
  98. GRB 131108A: CARMA 3mm detection
  99. GRB 131108A: Fermi GBM observation
  100. GRB 131108A: Swift/UVOT Detection

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