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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"

20538 results found.

  1. GRB 110305A: GROND Detection of Optical Afterglow
  2. GRB 110305A: Swift detection of a burst
  3. GRB 110223A: optical upper limits
  4. Swift/UVOT observations of GRB110223A
  5. No IPN GRB detected in conjunction with candidate GRB 110215
  6. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  7. Swift/UVOT observations of GRB110223b
  8. GRB 110223A : early optical limit by "Pi of the Sky"
  9. GRB 110223A: Enhanced Swift-XRT position
  10. GRB 110223B: Enhanced Swift-XRT position
  11. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  12. GRB 110223B: Swift detection of a burst
  13. GRB 110223A: Swift detection of a burst
  14. OT 110215: Further NIR observations from NOT of the GRB candidate
  15. GRB 110213B: Swift/UVOT observations
  16. Swift XRT and UVOT Observations of OT 110215
  17. OT 110215: NIR observations from NOT of GRB candidate
  18. GRB 110213A: optical observations in CrAO
  19. GRB 110213B: GROND observations of the optical/NIR afterglow
  20. OT 110215: possible GRB from 2MASS J00264184+8324093
  21. Swift/UVOT observations of GRB110210a.
  22. GRB 110210A: optical upper limit
  23. GRB 110210A: ROVOR Upper Limit
  24. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  25. GRB 110212A: Swift XRT and UVOT observations
  26. GRB 110205A: Konkoly optical observations
  27. GRB 110213B: Swift XRT observation
  28. GRB 110213A: MITSuME Akeno Optical Observation
  29. GRB110213A: MITSuME Okayama Optical Observation
  30. GRB 110213A: Swift/UVOT refined analysis
  31. GRB 110213B: MAXI/GSC detection of a probable GRB
  32. GRB 110213A: optical observations
  33. GRB 110213A: Enhanced Swift-XRT position
  34. GRB110212A: MITSuME Okayama optical upper limits
  35. GRB 110213A: P60 Optical Afterglow Detection
  36. GRB 110213A: Swift detection of a burst with optical afterglow
  37. GRB 110212A: GRT Optical Observation
  38. GRB 110212A: SARA-N Optical Limits
  39. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  40. GRB 110205A: detection of optical linear polarization from CAHA
  41. GRB 110210A: Enhanced Swift-XRT position
  42. GRB 110201A: optical observations
  43. GRB 110210A: Swift detection of a burst
  44. Swift/UVOT observations of GRB110208a
  45. GRB 110207A: Swift-XRT observations
  46. GRB 110208A: Enhanced Swift-XRT position
  47. GRB 110208A: Swift detection of a burst
  48. GRB 110206A: Decay of afterglow candidate
  49. GRB 110207A: TAROT Calern observatory optical observations
  50. GRB 110206A: GROND detection of afterglow candidate
  51. GRB 110206A: Swift detection of a probable X-ray afterglow
  52. GRB 110206A: TAROT La Silla observatory optical observations
  53. GRB110205A: MITSuME Ishigakijima Optical Observation
  54. GRB110205A: MITSuME Okayama Optical Observation
  55. GRB 110205A: Swift/UVOT Continuing Observations
  56. Observations GRB 110205A
  57. GRB 110205A: Newcastle Observatory Optical Observations
  58. GRB 110205A: LOAO B/R Observation
  59. GRB 110205A: optical flare confirmation
  60. GRB 110205A: NOT redshift confirmation
  61. GRB 110205A: Enhanced Swift-XRT position
  62. GRB 110205A: PAIRITEL NIR Afterglow Detection
  63. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  64. GRB 110205A: TAROT Calern observatory detection of an optical flare
  65. GRB 110205A: TAROT Calern observatory optical detection
  66. GRB 110205A: Swift detection of a burst with an optical candidate
  67. GRB110201A: MITSuME Okayama optical upper limits
  68. Swift/UVOT observations of GRB110201A
  69. GRB 110201A: Swift-BAT refined analysis
  70. GRB 110201A: Swift detection of a burst
  71. GRB110128A: MITSuME Okayama optical upper limits
  72. GRB 101112A: Maidanak and CrAO optical observations
  73. GRB110128A: TNG NIR observations
  74. GRB 110128A: TAROT-Calern refined analysis
  75. GRB 110128A: Swift/UVOT observations
  76. GRB 110128A: WHT redshifts of nearby field galaxies
  77. GRB 110128A: Enhanced Swift-XRT position
  78. GRB 110128A: Afterglow detection from NOT
  79. GRB 110128A: TAROT Calern observatory upper limits
  80. GRB 110128A: Swift detection of a burst
  81. GRB 110106B, radio observations
  82. GRB 110120A: MASTER optical observations
  83. IPN triangulation of GRB 110120A
  84. GRB 101225A: CQUEAN optical observation
  85. GRB 110106A: CrAO optical observations
  86. GRB 110112A: optical upper limit
  87. GRB110119: Swift/UVOT Detection
  88. GRB110119A: MITSuME Okayama optical upper limits
  89. GRB 110119A: Swift-BAT refined analysis
  90. GRB 110119A: PAIRITEL NIR Afterglow Detection
  91. GRB 110119A: Enhanced Swift-XRT position
  92. GRB 110119A: Swift detection of a burst with an optical detection
  93. GRB 101219B: tentative redshift and spectroscopic supernova detection
  94. GRB 101219B: GROND detection of a SN signature
  95. Swift-BAT trigger 442771 is a noise fluctuation
  96. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  97. New feature in Fermi GBM GRB Ground Position Notices
  98. Swift-BAT Trigger 442539 is not a GRB
  99. Swift Trigger 442539 is probably not a GRB
  100. Short GRB 110112B : early optical limit by "Pi of the Sky"

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