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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"

45777 results found.

  1. GRB 131127B: Bassano Bresciano Observatory optical observations of iPTF13ecv
  2. GRB 131122A: Swift-XRT Further Observation
  3. GRB 131128A: Bassano Bresciano Observatory optical upper limit
  4. GRB 131127A: RATIR Rejection of High-z Candidate
  5. GRB 131128A; Fermi GBM observation
  6. GRB 131125A: MASTER-Net very early optical observations
  7. GRB 131125A: iPTF upper limits on the afterglow of a short GRB
  8. Konus-Wind observation of GRB 131126A
  9. IPN Triangulation of GRB 131126A (short/hard)
  10. Konus-Wind observation of GRB 131125A
  11. GRB 131127A: CQUEAN riz Observation
  12. GRB 131128A: GROND observations of the afterglow
  13. IPN Triangulation of GRB 131125A (short/hard)
  14. GRB 131128A: Swift/UVOT Detection
  15. GRB 131128A: AROMA-N Optical Observation
  16. GRB 131127B: Bassano Bresciano Observatory optical observations
  17. GRB 131128A: Swift-XRT refined Analysis
  18. GRB 131128A: Kanata/HOWPol optical observation
  19. GRB 131128A: T100 observations
  20. GRB 131128A: Swift-BAT refined analysis
  21. GRB 131128A: Enhanced Swift-XRT position
  22. GRB 131128A: Nanshan afterglow confirmation
  23. GRB 131128A: MASTER-Net optical observations
  24. GRB 131128A: Nanshan afterglow candidate
  25. GRB 131127B: MASTER-Net optical observations
  26. GRB 131128A: Swift detection of a burst
  27. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  28. GRB 131127B: Nanshan optical observations
  29. Konus-Wind observation of GRB 131127B
  30. IPN Triangulation of GRB 131127B
  31. GRB 131127B: Fermi GBM detection
  32. GRB 131127A: Swift/UVOT Upper Limits
  33. GRB 131127A: AROMA-N Optical Observation
  34. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  35. Fermi407254341: iPTF optical afterglow candidates
  36. GRB 131127A: Swift-XRT refined Analysis
  37. GRB 131127A. 1.5m OSN optical limit
  38. GRB 131127A, Swift-BAT refined analysis
  39. GRB 131127A: Enhanced Swift-XRT position
  40. GRB 131127A: Mondy optical upper limit
  41. GRB 131127A: Nanshan optical upper limit
  42. GRB 131127A: MASTER-NET optical observations
  43. GRB 131127A: Swift detection of a burst
  44. GRB 131122A: Swift/UVOT Upper Limits
  45. GRB 131122A: Upper limit from NOT imaging
  46. GRB 131122A: Swift-XRT observations
  47. GRB 131122A: i-band observations from NOT
  48. GRB 131122A: Nanshan optical upper limit
  49. GRB 131122A: a long GRB detected with INTEGRAL
  50. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  51. GRB 131120A, Swift-BAT refined analysis
  52. Konus-Wind observation of GRB 131118A
  53. IPN Triangulation of GRB 131118A
  54. GRB 131120A: Swift detection of a burst
  55. Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB
  56. GRB 131118A: Fermi GBM detection
  57. GRB 131108A: VLA Observations
  58. GRB 131030A, Optical Observations
  59. GRB 131117A, Swift-BAT refined analysis
  60. Fermi GBM trigger 406351590 / 131117143 is not a GRB
  61. GRB 131117A: TAROT La Silla observatory optical observations
  62. GRB 131117A: Swift/UVOT Detection
  63. GRB 131117A: Swift-XRT refined Analysis
  64. GRB 131117A: VLT/X-shooter redshift
  65. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  66. GRB 131117A: Enhanced Swift-XRT position
  67. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  68. GRB 131117A: Swift detection of a burst
  69. GRB 130925A: HST imaging
  70. GRB 131110A: Swift-XRT and UVOT upper limits
  71. GRB 131110A BAT refined analysis
  72. GRB 131031A: Mondy optical observations
  73. GRB 131108A: ISON Blagoveshensk upper limit
  74. GRB 131108A: optical observations
  75. GRB 131110A found in ground analysis of BAT slew event data
  76. GRB 131108A: Continued RATIR Optical and NIR Observations
  77. GRB 131030A: MITSuME Akeno Optical observation
  78. Konus-Wind observation of GRB 131108A
  79. GRB 131108A: AGILE/GRID observation
  80. GRB 131108A: CARMA 3mm detection
  81. GRB 131108A: Fermi GBM observation
  82. GRB 131108A: Swift/UVOT Detection
  83. GRB 131108A: RATIR Optical and NIR Observations
  84. GRB 131108A: Swift-XRT observations
  85. GRB 131108A: TAROT-Calern optical observation
  86. GRB 131108A: Fermi-LAT refined analysis
  87. GRB 131108A: NOT optical observations
  88. GRB 131108A: Redshift from 10.4m GTC
  89. GRB 131108A: 1.23m CAHA optical candidate
  90. GRB 131108A: Swift detection of a possible X-ray afterglow
  91. IPN triangulation of GRB 131108A - correction
  92. IPN triangulation of GRB 131108A
  93. GRB 131108A Tiled Swift observations
  94. GRB 131108A: Fermi-LAT onboard detection of a burst
  95. GRB 131030A: RATIR Optical and NIR Upper Limits
  96. GRB 131030A: Continued RATIR Optical and NIR Observations
  97. GRB 131031A: Swift-XRT afterglow confirmation
  98. GRB 131029A: Suzaku WAM observation of the prompt emission
  99. GRB 131105A, Swift-BAT refined analysis
  100. GRB 131105A: Swift-XRT refined Analysis

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