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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"

43031 results found.

  1. GRB 110207A: TAROT Calern observatory optical observations
  2. GRB 110205A - Continued PAIRITEL NIR Observations
  3. GRB 110206A: GROND detection of afterglow candidate
  4. GRB 110207A: Swift-BAT refined analysis
  5. GRB 110205A: WSRT radio observation
  6. GRB 110206A: UVOT detection of afterglow candidate
  7. GRB110205A: CARMA 3mm Observations
  8. GRB 110207A: MASTER prompt and early optical observations
  9. Konus-Wind observation of GRB 110205A
  10. GRB 110207A: Swift detection of a burst
  11. GRB 110206A: Swift detection of a probable X-ray afterglow
  12. GRB 110206A: TAROT La Silla observatory optical observations
  13. GRB 110205A: Lightbuckets Optical Observations
  14. GRB 110206A: a long GRB detected by INTEGRAL
  15. GRB 110205A : Lulin optical observation
  16. GRB110205A: MITSuME Ishigakijima Optical Observation
  17. GRB110205A: MITSuME Okayama Optical Observation
  18. GRB 110205A: Swift/UVOT Continuing Observations
  19. GRB 110205A: Lulin optical observations and temporal decay index
  20. Observations GRB 110205A
  21. GRB 110205A: Swift-BAT refined analysis
  22. GRB 110205A: Newcastle Observatory Optical Observations
  23. GRB 110205A: Swift-XRT refined Analysis
  24. GRB 110205A: LOAO B/R Observation
  25. GRB 101225A is likely at z~0
  26. GRB 110205A: optical flare confirmation
  27. GRB 110205A: NOT redshift confirmation
  28. GRB 110205A: Enhanced Swift-XRT position
  29. GRB 110205A: FAST Redshift
  30. GRB 110205A: GRAS005 optical observations
  31. GRB 110205A: PAIRITEL NIR Afterglow Detection
  32. GRB 110205A: Possible Lick/Kast redshift
  33. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  34. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  35. GRB 110205A: TAROT Calern observatory detection of an optical flare
  36. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  37. GRB 110205A: TAROT Calern observatory optical detection
  38. GRB 110205A: Swift detection of a burst with an optical candidate
  39. GRB 110128A: Fermi GBM detection
  40. GRB 110201A: Swift-XRT refined Analysis
  41. GRB110201A: MITSuME Okayama optical upper limits
  42. Swift/UVOT observations of GRB110201A
  43. GRB 110201A: Swift-BAT refined analysis
  44. GRB 110201A: MASTER optical observations
  45. GRB 110201A: Swift detection of a burst
  46. GRB110112B: EVLA Observations
  47. GRB101224A: EVLA Observations
  48. GRB110112A: EVLA Observations
  49. GRB110128A: MITSuME Okayama optical upper limits
  50. GRB 110125A: Fermi GBM detection
  51. GRB 101112A: Maidanak and CrAO optical observations
  52. GRB110128A: TNG NIR observations
  53. GRB 110128A: TAROT-Calern refined analysis
  54. GRB 110128A: Swift/UVOT observations
  55. GRB 110128A: Swift-XRT refined Analysis
  56. GRB 110120A: Suzaku WAM observation of the prompt emission
  57. GRB 110128A: WHT redshifts of nearby field galaxies
  58. GRB 110128A: VLT/X-shooter redshift
  59. GRB 110128A: Enhanced Swift-XRT position
  60. GRB 110128A: Afterglow detection from NOT
  61. GRB 110128A: TAROT Calern observatory upper limits
  62. GRB 110128A: Swift detection of a burst
  63. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  64. Konus-Wind observation of GRB 110120A
  65. GRB 110123A: Fermi GBM detection
  66. GRB 110106B, radio observations
  67. GRB 110120A: MASTER optical observations
  68. GRB 110120A: Fermi LAT detection
  69. GRB 101224A, the review of the sky area in plate archives
  70. IPN triangulation of GRB 110120A
  71. GRB 101225A: CQUEAN optical observation
  72. GRB 110119A: Fermi GBM detection
  73. GRB 110120A: Fermi GBM detection
  74. GRB 110119A: Suzaku WAM observation of the prompt emission
  75. GRB 110120A: MASTER optical observations
  76. GRB110119: Swift/UVOT Detection
  77. GRB 110119A: Swift-XRT refined Analysis
  78. GRB110119A: MITSuME Okayama optical upper limits
  79. GRB 110119A: Swift-BAT refined analysis
  80. GRB 110119A: PAIRITEL NIR Afterglow Detection
  81. GRB 110119A: Enhanced Swift-XRT position
  82. GRB 110119A: Swift detection of a burst with an optical detection
  83. GRB110106A, mm-radio observations
  84. GRB 101219B: tentative redshift and spectroscopic supernova detection
  85. GRB 101219B: GROND detection of a SN signature
  86. Swift-BAT trigger 442771 is a noise fluctuation
  87. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  88. New feature in Fermi GBM GRB Ground Position Notices
  89. Swift-BAT Trigger 442539 is not a GRB
  90. Swift Trigger 442539 is probably not a GRB
  91. Short GRB 110112B : early optical limit by "Pi of the Sky"
  92. GRB101225A - timing analysis
  93. GRB 110112B: Fermi GBM observation
  94. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  95. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  96. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  97. GRB 101225A: HST observations - no host detected
  98. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  99. GRB 110112B: A short GRB detected by INTEGRAL
  100. GRB 110112A: Swift-XRT refined Analysis

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