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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"

41951 results found.

  1. GRB 131128A: Swift-BAT refined analysis
  2. GRB 131128A: Nanshan afterglow confirmation
  3. GRB 131128A: MASTER-Net optical observations
  4. GRB 131128A: Nanshan afterglow candidate
  5. GRB 131127B: MASTER-Net optical observations
  6. GRB 131128A: Swift detection of a burst
  7. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  8. GRB 131127B: Nanshan optical observations
  9. Konus-Wind observation of GRB 131127B
  10. IPN Triangulation of GRB 131127B
  11. GRB 131127B: Fermi GBM detection
  12. GRB 131127A: Swift/UVOT Upper Limits
  13. GRB 131127A: AROMA-N Optical Observation
  14. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  15. Fermi407254341: iPTF optical afterglow candidates
  16. GRB 131127A: Swift-XRT refined Analysis
  17. GRB 131127A, Swift-BAT refined analysis
  18. GRB 131127A: Mondy optical upper limit
  19. GRB 131127A: Nanshan optical upper limit
  20. GRB 131127A: MASTER-NET optical observations
  21. GRB 131127A: Swift detection of a burst
  22. GRB 131122A: Swift/UVOT Upper Limits
  23. GRB 131122A: Upper limit from NOT imaging
  24. GRB 131122A: Swift-XRT observations
  25. GRB 131122A: i-band observations from NOT
  26. GRB 131122A: Nanshan optical upper limit
  27. GRB 131122A: a long GRB detected with INTEGRAL
  28. GRB 131122A (INTEGRAL trigger N6392): MASTER-NET optical observation
  29. GRB 131120A, Swift-BAT refined analysis
  30. Konus-Wind observation of GRB 131118A
  31. IPN Triangulation of GRB 131118A
  32. GRB 131120A: Swift detection of a burst
  33. Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB
  34. GRB 131118A: Fermi GBM detection
  35. GRB 131108A: VLA Observations
  36. GRB 131030A, Optical Observations
  37. GRB 131117A, Swift-BAT refined analysis
  38. Fermi GBM trigger 406351590 / 131117143 is not a GRB
  39. GRB 131117A: TAROT La Silla observatory optical observations
  40. GRB 131117A: Swift/UVOT Detection
  41. GRB 131117A: Swift-XRT refined Analysis
  42. GRB 131117A: VLT/X-shooter redshift
  43. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  44. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  45. GRB 131117A: Swift detection of a burst
  46. GRB 130925A: HST imaging
  47. GRB 131110A: Swift-XRT and UVOT upper limits
  48. GRB 131110A BAT refined analysis
  49. GRB 131031A: Mondy optical observations
  50. GRB 131108A: ISON Blagoveshensk upper limit
  51. GRB 131108A: optical observations
  52. GRB 131110A found in ground analysis of BAT slew event data
  53. GRB 131108A: Continued RATIR Optical and NIR Observations
  54. GRB 131030A: MITSuME Akeno Optical observation
  55. Konus-Wind observation of GRB 131108A
  56. GRB 131108A: AGILE/GRID observation
  57. GRB 131108A: CARMA 3mm detection
  58. GRB 131108A: Fermi GBM observation
  59. GRB 131108A: Swift/UVOT Detection
  60. GRB 131108A: RATIR Optical and NIR Observations
  61. GRB 131108A: Swift-XRT observations
  62. GRB 131108A: TAROT-Calern optical observation
  63. GRB 131108A: Fermi-LAT refined analysis
  64. GRB 131108A: NOT optical observations
  65. GRB 131108A: Redshift from 10.4m GTC
  66. GRB 131108A: 1.23m CAHA optical candidate
  67. GRB 131108A: Swift detection of a possible X-ray afterglow
  68. IPN triangulation of GRB 131108A - correction
  69. IPN triangulation of GRB 131108A
  70. GRB 131108A Tiled Swift observations
  71. GRB 131108A: Fermi-LAT onboard detection of a burst
  72. GRB 131030A: RATIR Optical and NIR Upper Limits
  73. GRB 131030A: Continued RATIR Optical and NIR Observations
  74. GRB 131031A: Swift-XRT afterglow confirmation
  75. GRB 131029A: Suzaku WAM observation of the prompt emission
  76. GRB 131105A, Swift-BAT refined analysis
  77. GRB 131105A: Swift-XRT refined Analysis
  78. GRB 131103A: Swift-BAT refined analysis
  79. GRB 131030A: Swift-BAT refined analysis
  80. GRB 131105A: Fermi GBM observation
  81. GRB 131105A: Swift/UVOT Upper Limits
  82. GRB 131024B: Suzaku WAM observation of the prompt emission
  83. Konus-Wind observation of GRB 131105A
  84. GRB 131103A: VLT/X-shooter redshift
  85. GRB 131105A: VLT/X-shooter redshift
  86. GRB 131105A: TAROT La Silla observatory optical observations
  87. GRB 131105A: VLT/X-shooter optical afterglow candidate
  88. GRB 131105A: Swift detection of a burst
  89. GRB 131103A: NOT and VLT observations
  90. GRB 131030A: Continued RATIR Optical and NIR Observations
  91. GRB 131103A: Swift/UVOT Detection
  92. GRB 131103A: Swift-XRT refined Analysis
  93. GRB 131103A: Swift detection of a burst
  94. GRB 131031A: RATIR Optical and NIR Observations and Upper Limits
  95. GRB131031A: RATIR Optical and NIR Observations
  96. GRB 131018B: RATIR Optical/NIR Observations
  97. GRB 131030A: Continued RATIR Optical and NIR Observations
  98. GRB 131030A: the 2nd epoch of SAO RAS observations
  99. GRB 131031A: Fermi GBM detection
  100. GRB 131031A: Swift/UVOT Upper Limits

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