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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"

43155 results found.

  1. IPN Triangulation of GRB 131126A (short/hard)
  2. Konus-Wind observation of GRB 131125A
  3. GRB 131127A: CQUEAN riz Observation
  4. GRB 131128A: GROND observations of the afterglow
  5. IPN Triangulation of GRB 131125A (short/hard)
  6. GRB 131128A: Swift/UVOT Detection
  7. GRB 131128A: AROMA-N Optical Observation
  8. GRB 131127B: Bassano Bresciano Observatory optical observations
  9. GRB 131128A: Swift-XRT refined Analysis
  10. GRB 131128A: Kanata/HOWPol optical observation
  11. GRB 131128A: T100 observations
  12. GRB 131128A: Swift-BAT refined analysis
  13. GRB 131128A: Enhanced Swift-XRT position
  14. GRB 131128A: Nanshan afterglow confirmation
  15. GRB 131128A: MASTER-Net optical observations
  16. GRB 131128A: Nanshan afterglow candidate
  17. GRB 131127B: MASTER-Net optical observations
  18. GRB 131128A: Swift detection of a burst
  19. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  20. GRB 131127B: Nanshan optical observations
  21. Konus-Wind observation of GRB 131127B
  22. IPN Triangulation of GRB 131127B
  23. GRB 131127B: Fermi GBM detection
  24. GRB 131127A: Swift/UVOT Upper Limits
  25. GRB 131127A: AROMA-N Optical Observation
  26. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  27. Fermi407254341: iPTF optical afterglow candidates
  28. GRB 131127A: Swift-XRT refined Analysis
  29. GRB 131127A. 1.5m OSN optical limit
  30. GRB 131127A, Swift-BAT refined analysis
  31. GRB 131127A: Enhanced Swift-XRT position
  32. GRB 131127A: Mondy optical upper limit
  33. GRB 131127A: Nanshan optical upper limit
  34. GRB 131127A: MASTER-NET optical observations
  35. GRB 131127A: Swift detection of a burst
  36. GRB 131122A: Swift/UVOT Upper Limits
  37. GRB 131122A: Swift-XRT observations
  38. GRB 131122A: i-band observations from NOT
  39. GRB 131122A: Nanshan optical upper limit
  40. GRB 131122A: a long GRB detected with INTEGRAL
  41. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  42. GRB 131120A, Swift-BAT refined analysis
  43. Konus-Wind observation of GRB 131118A
  44. IPN Triangulation of GRB 131118A
  45. GRB 131120A: Swift detection of a burst
  46. GRB 131118A: Fermi GBM detection
  47. GRB 131108A: VLA Observations
  48. GRB 131030A, Optical Observations
  49. GRB 131117A, Swift-BAT refined analysis
  50. Fermi GBM trigger 406351590 / 131117143 is not a GRB
  51. GRB 131117A: TAROT La Silla observatory optical observations
  52. GRB 131117A: Swift/UVOT Detection
  53. GRB 131117A: Swift-XRT refined Analysis
  54. GRB 131117A: VLT/X-shooter redshift
  55. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  56. GRB 131117A: Enhanced Swift-XRT position
  57. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  58. GRB 131117A: Swift detection of a burst
  59. GRB 130925A: HST imaging
  60. GRB 131110A: Swift-XRT and UVOT upper limits
  61. GRB 131110A BAT refined analysis
  62. GRB 131031A: Mondy optical observations
  63. GRB 131108A: optical observations
  64. GRB 131110A found in ground analysis of BAT slew event data
  65. GRB 131108A: Continued RATIR Optical and NIR Observations
  66. GRB 131030A: MITSuME Akeno Optical observation
  67. Konus-Wind observation of GRB 131108A
  68. GRB 131108A: AGILE/GRID observation
  69. GRB 131108A: CARMA 3mm detection
  70. GRB 131108A: Fermi GBM observation
  71. GRB 131108A: Swift/UVOT Detection
  72. GRB 131108A: RATIR Optical and NIR Observations
  73. GRB 131108A: Swift-XRT observations
  74. GRB 131108A: TAROT-Calern optical observation
  75. GRB 131108A: Fermi-LAT refined analysis
  76. GRB 131108A: Redshift from 10.4m GTC
  77. GRB 131108A: Swift detection of a possible X-ray afterglow
  78. IPN triangulation of GRB 131108A - correction
  79. IPN triangulation of GRB 131108A
  80. GRB 131108A Tiled Swift observations
  81. GRB 131108A: Fermi-LAT onboard detection of a burst
  82. GRB 131030A: RATIR Optical and NIR Upper Limits
  83. GRB 131030A: Continued RATIR Optical and NIR Observations
  84. GRB 131029A: Suzaku WAM observation of the prompt emission
  85. GRB 131105A, Swift-BAT refined analysis
  86. GRB 131105A: Swift-XRT refined Analysis
  87. GRB 131103A: Swift-BAT refined analysis
  88. GRB 131030A: Swift-BAT refined analysis
  89. GRB 131105A: Fermi GBM observation
  90. GRB 131105A: Swift/UVOT Upper Limits
  91. GRB 131024B: Suzaku WAM observation of the prompt emission
  92. Konus-Wind observation of GRB 131105A
  93. GRB 131103A: VLT/X-shooter redshift
  94. GRB 131105A: VLT/X-shooter redshift
  95. GRB 131105A: TAROT La Silla observatory optical observations
  96. GRB 131105A: Enhanced Swift-XRT position
  97. GRB 131105A: VLT/X-shooter optical afterglow candidate
  98. GRB 131105A: Swift detection of a burst
  99. GRB 131103A: NOT and VLT observations
  100. GRB 131030A: Continued RATIR Optical and NIR Observations

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