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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"

39364 results found.

  1. GRB 110205A - Continued PAIRITEL NIR Observations
  2. GRB 110206A: GROND detection of afterglow candidate
  3. GRB 110207A: Swift-BAT refined analysis
  4. GRB 110205A: WSRT radio observation
  5. GRB 110206A: UVOT detection of afterglow candidate
  6. GRB 110207A: MASTER prompt and early optical observations
  7. Konus-Wind observation of GRB 110205A
  8. GRB 110207A: Swift detection of a burst
  9. GRB 110206A: Swift detection of a probable X-ray afterglow
  10. GRB 110206A: TAROT La Silla observatory optical observations
  11. GRB 110205A: Lightbuckets Optical Observations
  12. GRB 110206A: a long GRB detected by INTEGRAL
  13. GRB 110205A : Lulin optical observation
  14. GRB110205A: MITSuME Ishigakijima Optical Observation
  15. GRB110205A: MITSuME Okayama Optical Observation
  16. GRB 110205A: Swift/UVOT Continuing Observations
  17. GRB 110205A: Lulin optical observations and temporal decay index
  18. Observations GRB 110205A
  19. GRB 110205A: Swift-BAT refined analysis
  20. GRB 110205A: Newcastle Observatory Optical Observations
  21. GRB 110205A: Swift-XRT refined Analysis
  22. GRB 110205A: LOAO B/R Observation
  23. GRB 101225A is likely at z~0
  24. GRB 110205A: optical flare confirmation
  25. GRB 110205A: NOT redshift confirmation
  26. GRB 110205A: Enhanced Swift-XRT position
  27. GRB 110205A: FAST Redshift
  28. GRB 110205A: GRAS005 optical observations
  29. GRB 110205A: PAIRITEL NIR Afterglow Detection
  30. GRB 110205A: Possible Lick/Kast redshift
  31. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  32. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  33. GRB 110205A: TAROT Calern observatory detection of an optical flare
  34. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  35. GRB 110205A: TAROT Calern observatory optical detection
  36. GRB 110205A: Swift detection of a burst with an optical candidate
  37. GRB 110128A: Fermi GBM detection
  38. GRB 110201A: Swift-XRT refined Analysis
  39. GRB110201A: MITSuME Okayama optical upper limits
  40. Swift/UVOT observations of GRB110201A
  41. GRB 110201A: Swift-BAT refined analysis
  42. GRB 110201A: MASTER optical observations
  43. GRB 110201A: Swift detection of a burst
  44. GRB110112B: EVLA Observations
  45. GRB101224A: EVLA Observations
  46. GRB110112A: EVLA Observations
  47. GRB110128A: MITSuME Okayama optical upper limits
  48. GRB 110125A: Fermi GBM detection
  49. GRB 101112A: Maidanak and CrAO optical observations
  50. GRB110128A: TNG NIR observations
  51. GRB 110128A, Swift-BAT refined analysis
  52. GRB 110128A: TAROT-Calern refined analysis
  53. GRB 110128A: Swift/UVOT observations
  54. GRB 110128A: Swift-XRT refined Analysis
  55. GRB 110120A: Suzaku WAM observation of the prompt emission
  56. GRB 110128A: WHT redshifts of nearby field galaxies
  57. GRB 110128A: VLT/X-shooter redshift
  58. GRB 110128A: Enhanced Swift-XRT position
  59. GRB 110128A: Afterglow detection from NOT
  60. GRB 110128A: TAROT Calern observatory upper limits
  61. GRB 110128A: Swift detection of a burst
  62. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  63. Konus-Wind observation of GRB 110120A
  64. GRB 110123A: Fermi GBM detection
  65. GRB 110106B, radio observations
  66. GRB 110120A: MASTER optical observations
  67. GRB 110120A: Fermi LAT detection
  68. GRB 101224A, the review of the sky area in plate archives
  69. IPN triangulation of GRB 110120A
  70. GRB 101225A: CQUEAN optical observation
  71. GRB 110106A: CrAO optical observations
  72. GRB 110119A: Fermi GBM detection
  73. GRB 110120A: Fermi GBM detection
  74. GRB 110119A: Suzaku WAM observation of the prompt emission
  75. GRB 110112A: optical upper limit
  76. GRB 110120A: MASTER optical observations
  77. GRB110119: Swift/UVOT Detection
  78. GRB 110119A: Swift-XRT refined Analysis
  79. GRB110119A: MITSuME Okayama optical upper limits
  80. GRB 110119A: Swift-BAT refined analysis
  81. GRB 110119A: PAIRITEL NIR Afterglow Detection
  82. GRB 110119A: Enhanced Swift-XRT position
  83. GRB 110119A: Swift detection of a burst with an optical detection
  84. GRB110106A, mm-radio observations
  85. GRB 101219B: tentative redshift and spectroscopic supernova detection
  86. GRB 101219B: GROND detection of a SN signature
  87. GRB 101219B: correction
  88. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  89. New feature in Fermi GBM GRB Ground Position Notices
  90. Swift-BAT Trigger 442539 is not a GRB
  91. Swift Trigger 442539 is probably not a GRB
  92. Short GRB 110112B : early optical limit by "Pi of the Sky"
  93. GRB101225A - timing analysis
  94. GRB 110112B: Fermi GBM observation
  95. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  96. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  97. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  98. GRB 110107A: Swift-XRT afterglow confirmation
  99. GRB 101225A: HST observations - no host detected
  100. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT

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