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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"

28203 results found.

  1. GRB 110213A: optical observations
  2. GRB 110213A: Enhanced Swift-XRT position
  3. GRB 110213A: KAIT observations
  4. GRB 110213A: GRAS011 optical observations
  5. GRB 110213A: Bok Telescope Redshift
  6. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  7. GRB 110213A: P60 Optical Afterglow Detection
  8. GRB 110213A: Swift detection of a burst with optical afterglow
  9. GRB 110212A: GRT Optical Observation
  10. GRB 110212A: Swift detection of a burst
  11. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  12. GRB 110205A: detection of optical linear polarization from CAHA
  13. GRB 110210A: optical upper limit
  14. GRB 110210A: Swift-XRT refined Analysis
  15. GRB 110210A: Enhanced Swift-XRT position
  16. GRB 110201A: optical observations
  17. GRB 110210A: Swift detection of a burst
  18. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  19. GRB 110208A: Magellan confirmation of the optical afterglow
  20. Fermi GBM detection of a burst from 1E 1841-045
  21. Swift/UVOT observations of GRB110208a
  22. GRB 110208A: Potential afterglow from Magellan
  23. GRB 110207A: Swift-XRT observations
  24. GRB 110208A: Swift-XRT refined Analysis
  25. GRB 110208A: Enhanced Swift-XRT position
  26. GRB 110208A: Magellan optical observations
  27. GRB 110206A: SMARTS optical/IR afterglow decay
  28. GRB 110208A: Swift detection of a burst
  29. SGR-like outburst from the magnetar 1E 1841-04.5
  30. GRB 110205A: optical observations in Mondy observatory
  31. GRB 110205A : HCT optical observations
  32. GRB 110206A: Decay of afterglow candidate
  33. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  34. GRB 110205A - Continued PAIRITEL NIR Observations
  35. GRB 110206A: GROND detection of afterglow candidate
  36. GRB 110205A: WSRT radio observation
  37. GRB 110206A: UVOT detection of afterglow candidate
  38. GRB110205A: CARMA 3mm Observations
  39. Konus-Wind observation of GRB 110205A
  40. GRB 110207A: Swift detection of a burst
  41. GRB 110206A: Swift detection of a probable X-ray afterglow
  42. GRB 110205A: Lightbuckets Optical Observations
  43. GRB 110205A : Lulin optical observation
  44. GRB110205A: MITSuME Ishigakijima Optical Observation
  45. GRB110205A: MITSuME Okayama Optical Observation
  46. GRB110205A: SMA 1.3mm Observations
  47. GRB 110205A: Lulin optical observations and temporal decay index
  48. Observations GRB 110205A
  49. GRB 110205A: Newcastle Observatory Optical Observations
  50. GRB 110205A: Swift-XRT refined Analysis
  51. GRB 110205A: LOAO B/R Observation
  52. GRB 101225A is likely at z~0
  53. GRB 110205A: optical flare confirmation
  54. GRB 110205A: NOT redshift confirmation
  55. GRB 110205A: Enhanced Swift-XRT position
  56. GRB 110205A: FAST Redshift
  57. GRB 110205A: GRAS005 optical observations
  58. GRB 110205A: PAIRITEL NIR Afterglow Detection
  59. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  60. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  61. GRB 110205A: TAROT Calern observatory detection of an optical flare
  62. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  63. GRB 110205A: TAROT Calern observatory optical detection
  64. GRB 110205A: Swift detection of a burst with an optical candidate
  65. GRB 110128A: Fermi GBM detection
  66. GRB 110201A: Swift-XRT refined Analysis
  67. GRB110201A: MITSuME Okayama optical upper limits
  68. Swift/UVOT observations of GRB110201A
  69. GRB 110201A: MASTER optical observations
  70. GRB 110201A: Swift detection of a burst
  71. GRB101224A: EVLA Observations
  72. GRB110112A: EVLA Observations
  73. GRB110128A: MITSuME Okayama optical upper limits
  74. GRB 110125A: Fermi GBM detection
  75. GRB 101112A: Maidanak and CrAO optical observations
  76. GRB110128A: TNG NIR observations
  77. GRB 110128A: TAROT-Calern refined analysis
  78. GRB 110128A: Swift/UVOT observations
  79. GRB 110128A: Swift-XRT refined Analysis
  80. GRB 110128A: WHT redshifts of nearby field galaxies
  81. GRB 110128A: VLT/X-shooter redshift
  82. GRB 110128A: Enhanced Swift-XRT position
  83. GRB 110128A: Afterglow detection from NOT
  84. GRB 110128A: Swift detection of a burst
  85. GRB 110123A: Fermi GBM detection
  86. GRB 110106B, radio observations
  87. GRB 110120A: Fermi LAT detection
  88. GRB 101225A: CQUEAN optical observation
  89. GRB 110106A: CrAO optical observations
  90. GRB 110119A: Fermi GBM detection
  91. GRB 110120A: Fermi GBM detection
  92. GRB 110112A: optical upper limit
  93. GRB110119: Swift/UVOT Detection
  94. GRB 110119A: Swift-XRT refined Analysis
  95. GRB110119A: MITSuME Okayama optical upper limits
  96. GRB 110119A: PAIRITEL NIR Afterglow Detection
  97. GRB 110119A: Enhanced Swift-XRT position
  98. GRB 110119A: Swift detection of a burst with an optical detection
  99. GRB110106A, mm-radio observations
  100. GRB 101219B: tentative redshift and spectroscopic supernova detection

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