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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"

28121 results found.

  1. GRB 110208A: Swift detection of a burst
  2. GRB 110205A : HCT optical observations
  3. GRB 110206A: Decay of afterglow candidate
  4. GRB 110207A: TAROT Calern observatory optical observations
  5. GRB 110206A: GROND detection of afterglow candidate
  6. GRB 110207A: Swift-BAT refined analysis
  7. Konus-Wind observation of GRB 110205A
  8. GRB 110206A: Swift detection of a probable X-ray afterglow
  9. GRB 110206A: TAROT La Silla observatory optical observations
  10. GRB 110205A: Lightbuckets Optical Observations
  11. GRB 110206A: a long GRB detected by INTEGRAL
  12. GRB110205A: MITSuME Ishigakijima Optical Observation
  13. GRB110205A: MITSuME Okayama Optical Observation
  14. GRB 110205A: Swift/UVOT Continuing Observations
  15. Observations GRB 110205A
  16. GRB 110205A: Swift-BAT refined analysis
  17. GRB 110205A: Newcastle Observatory Optical Observations
  18. GRB 110205A: Swift-XRT refined Analysis
  19. GRB 110205A: LOAO B/R Observation
  20. GRB 110205A: optical flare confirmation
  21. GRB 110205A: NOT redshift confirmation
  22. GRB 110205A: Enhanced Swift-XRT position
  23. GRB 110205A: PAIRITEL NIR Afterglow Detection
  24. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  25. GRB 110205A: TAROT Calern observatory detection of an optical flare
  26. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  27. GRB 110205A: TAROT Calern observatory optical detection
  28. GRB 110205A: Swift detection of a burst with an optical candidate
  29. GRB 110128A: Fermi GBM detection
  30. GRB 110201A: Swift-XRT refined Analysis
  31. GRB110201A: MITSuME Okayama optical upper limits
  32. Swift/UVOT observations of GRB110201A
  33. GRB 110201A: Swift-BAT refined analysis
  34. GRB 110201A: Swift detection of a burst
  35. GRB110112B: EVLA Observations
  36. GRB110112A: EVLA Observations
  37. GRB110128A: MITSuME Okayama optical upper limits
  38. GRB 110125A: Fermi GBM detection
  39. GRB 101112A: Maidanak and CrAO optical observations
  40. GRB110128A: TNG NIR observations
  41. GRB 110128A, Swift-BAT refined analysis
  42. GRB 110128A: Swift/UVOT observations
  43. GRB 110128A: Swift-XRT refined Analysis
  44. GRB 110120A: Suzaku WAM observation of the prompt emission
  45. GRB 110128A: WHT redshifts of nearby field galaxies
  46. GRB 110128A: Enhanced Swift-XRT position
  47. GRB 110128A: Afterglow detection from NOT
  48. GRB 110128A: TAROT Calern observatory upper limits
  49. GRB 110128A: Swift detection of a burst
  50. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  51. GRB 110123A: Fermi GBM detection
  52. GRB 110106B, radio observations
  53. GRB 110120A: MASTER optical observations
  54. GRB 101224A, the review of the sky area in plate archives
  55. IPN triangulation of GRB 110120A
  56. GRB 101225A: CQUEAN optical observation
  57. GRB 110106A: CrAO optical observations
  58. GRB 110119A: Fermi GBM detection
  59. GRB 110120A: Fermi GBM detection
  60. GRB 110119A: Suzaku WAM observation of the prompt emission
  61. GRB 110112A: optical upper limit
  62. GRB110119: Swift/UVOT Detection
  63. GRB 110119A: Swift-XRT refined Analysis
  64. GRB110119A: MITSuME Okayama optical upper limits
  65. GRB 110119A: Swift-BAT refined analysis
  66. GRB 110119A: PAIRITEL NIR Afterglow Detection
  67. GRB 110119A: Enhanced Swift-XRT position
  68. GRB 110119A: Swift detection of a burst with an optical detection
  69. GRB110106A, mm-radio observations
  70. GRB 101219B: GROND detection of a SN signature
  71. Swift-BAT trigger 442771 is a noise fluctuation
  72. New feature in Fermi GBM GRB Ground Position Notices
  73. Swift-BAT Trigger 442539 is not a GRB
  74. Swift Trigger 442539 is probably not a GRB
  75. Short GRB 110112B : early optical limit by "Pi of the Sky"
  76. GRB101225A - timing analysis
  77. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  78. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  79. GRB 110107A: Swift-XRT afterglow confirmation
  80. GRB 101225A: HST observations - no host detected
  81. GRB 110112A: Swift-XRT refined Analysis
  82. GRB 110112A: Swift/UVOT upper limits
  83. GRB 110112A: WHT candidate afterglow/host galaxy
  84. GRB 110112A: Swift-BAT refined analysis
  85. GRB 110112A: Enhanced Swift-XRT position
  86. GRB110112A: TNT optical afterglow candidate
  87. GRB 110112A: Swift detection of a possible short burst
  88. GRB 110107A: Swift/UVOT upper limits
  89. GRB 101219b. Possible radio afterglow detection.
  90. GRB 110107A: Swift-XRT Afterglow Candidate
  91. GRB 110106B: Fermi GBM detection
  92. GRB 110106B: Swift-XRT refined Analysis
  93. GRB 110106A: TNG NIR observations
  94. GRB 110106A: ISAS-Kanazawa optical upper limit
  95. GRB 110106A: MITSuME Okayama optical upper limits
  96. GRB 110106B: Swift-BAT refined analysis
  97. GRB 110106B: Enhanced Swift-XRT position
  98. GRB 110106A: Swift/UVOT Upper Limits
  99. GRB 110106A: TNG redshift of the closeby galaxy
  100. GRB 110106A: Swift-XRT refined Analysis

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