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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"

43161 results found.

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

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