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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"

42541 results found.

  1. GRB 131126A: Fermi GBM observation
  2. GRB 131126A: iPTF upper limits on the afterglow of a short GRB
  3. GRB 090530: X-shooter redshift
  4. GRB 131127A: optically dark burst
  5. GRB 131202A, Swift-BAT refined analysis
  6. GRB 131202A: Swift/UVOT Upper Limits
  7. GRB 131202A: Swift-XRT refined Analysis
  8. GRB 131202A: RATIR Optical and NIR Observations
  9. GRB 131202A: Fermi GBM Detection
  10. GRB 131202A: Enhanced Swift-XRT position
  11. GRB 131202A: Bassano Bresciano Observatory optical upper limit
  12. GRB 131202A: Tautenburg observations
  13. GRB 131202A : XMM-Newton planned observation
  14. GRB 060614: theoretical derivation of the redshift and need for deeper search of the host galaxy
  15. GRB 131202A: Swift detection of a burst
  16. GRB 131127B: Bassano Bresciano Observatory optical observations of iPTF13ecv
  17. GRB 131122A: Swift-XRT Further Observation
  18. GRB 131128A: Bassano Bresciano Observatory optical upper limit
  19. GRB 131127A: RATIR Rejection of High-z Candidate
  20. GRB 131128A; Fermi GBM observation
  21. GRB 131125A: MASTER-Net very early optical observations
  22. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  23. Konus-Wind observation of GRB 131126A
  24. IPN Triangulation of GRB 131126A (short/hard)
  25. Konus-Wind observation of GRB 131125A
  26. GRB 131127A: CQUEAN riz Observation
  27. GRB 131128A: GROND observations of the afterglow
  28. GRB 131128A: Swift/UVOT Detection
  29. GRB 131128A: AROMA-N Optical Observation
  30. GRB 131127B: Bassano Bresciano Observatory optical observations
  31. GRB 131128A: Swift-XRT refined Analysis
  32. GRB 131128A: Kanata/HOWPol optical observation
  33. GRB 131128A: T100 observations
  34. GRB 131128A: Swift-BAT refined analysis
  35. GRB 131128A: Enhanced Swift-XRT position
  36. GRB 131128A: Nanshan afterglow confirmation
  37. GRB 131128A: MASTER-Net optical observations
  38. GRB 131128A: Nanshan afterglow candidate
  39. GRB 131127B: MASTER-Net optical observations
  40. GRB 131128A: Swift detection of a burst
  41. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  42. GRB 131127B: Nanshan optical observations
  43. Konus-Wind observation of GRB 131127B
  44. IPN Triangulation of GRB 131127B
  45. GRB 131127B: Fermi GBM detection
  46. GRB 131127A: Swift/UVOT Upper Limits
  47. GRB 131127A: AROMA-N Optical Observation
  48. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  49. Fermi407254341: iPTF optical afterglow candidates
  50. GRB 131127A: Swift-XRT refined Analysis
  51. GRB 131127A. 1.5m OSN optical limit
  52. GRB 131127A, Swift-BAT refined analysis
  53. GRB 131127A: Enhanced Swift-XRT position
  54. GRB 131127A: Mondy optical upper limit
  55. GRB 131127A: Nanshan optical upper limit
  56. GRB 131127A: MASTER-NET optical observations
  57. GRB 131127A: Swift detection of a burst
  58. GRB 131122A: Swift/UVOT Upper Limits
  59. GRB 131122A: Upper limit from NOT imaging
  60. GRB 131122A: Swift-XRT observations
  61. GRB 131122A: i-band observations from NOT
  62. GRB 131122A: Nanshan optical upper limit
  63. GRB 131122A: a long GRB detected with INTEGRAL
  64. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  65. GRB 131120A, Swift-BAT refined analysis
  66. Konus-Wind observation of GRB 131118A
  67. GRB 131120A: Swift detection of a burst
  68. GRB 131118A: Fermi GBM detection
  69. GRB 131108A: VLA Observations
  70. GRB 131030A, Optical Observations
  71. GRB 131117A, Swift-BAT refined analysis
  72. GRB 131117A: TAROT La Silla observatory optical observations
  73. GRB 131117A: Swift/UVOT Detection
  74. GRB 131117A: Swift-XRT refined Analysis
  75. GRB 131117A: VLT/X-shooter redshift
  76. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  77. GRB 131117A: Enhanced Swift-XRT position
  78. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  79. GRB 131117A: Swift detection of a burst
  80. GRB 130925A: HST imaging
  81. GRB 131110A: Swift-XRT and UVOT upper limits
  82. GRB 131110A BAT refined analysis
  83. GRB 131031A: Mondy optical observations
  84. GRB 131108A: ISON Blagoveshensk upper limit
  85. GRB 131108A: optical observations
  86. GRB 131110A found in ground analysis of BAT slew event data
  87. GRB 131108A: Continued RATIR Optical and NIR Observations
  88. GRB 131030A: MITSuME Akeno Optical observation
  89. Konus-Wind observation of GRB 131108A
  90. GRB 131108A: AGILE/GRID observation
  91. GRB 131108A: CARMA 3mm detection
  92. GRB 131108A: Fermi GBM observation
  93. GRB 131108A: Swift/UVOT Detection
  94. GRB 131108A: RATIR Optical and NIR Observations
  95. GRB 131108A: Swift-XRT observations
  96. GRB 131108A: TAROT-Calern optical observation
  97. GRB 131108A: Fermi-LAT refined analysis
  98. GRB 131108A: NOT optical observations
  99. GRB 131108A: Redshift from 10.4m GTC
  100. GRB 131108A: 1.23m CAHA optical candidate

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