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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"

28101 results found.

  1. GRB 110205A: NOT redshift confirmation
  2. GRB 110205A: Enhanced Swift-XRT position
  3. GRB 110205A: PAIRITEL NIR Afterglow Detection
  4. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  5. GRB 110205A: TAROT Calern observatory detection of an optical flare
  6. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  7. GRB 110205A: TAROT Calern observatory optical detection
  8. GRB 110205A: Swift detection of a burst with an optical candidate
  9. GRB 110128A: Fermi GBM detection
  10. GRB 110201A: Swift-XRT refined Analysis
  11. GRB110201A: MITSuME Okayama optical upper limits
  12. Swift/UVOT observations of GRB110201A
  13. GRB 110201A: Swift-BAT refined analysis
  14. GRB 110201A: Swift detection of a burst
  15. GRB110112B: EVLA Observations
  16. GRB110112A: EVLA Observations
  17. GRB110128A: MITSuME Okayama optical upper limits
  18. GRB 110125A: Fermi GBM detection
  19. GRB 101112A: Maidanak and CrAO optical observations
  20. GRB110128A: TNG NIR observations
  21. GRB 110128A, Swift-BAT refined analysis
  22. GRB 110128A: Swift/UVOT observations
  23. GRB 110128A: Swift-XRT refined Analysis
  24. GRB 110120A: Suzaku WAM observation of the prompt emission
  25. GRB 110128A: WHT redshifts of nearby field galaxies
  26. GRB 110128A: Enhanced Swift-XRT position
  27. GRB 110128A: Afterglow detection from NOT
  28. GRB 110128A: TAROT Calern observatory upper limits
  29. GRB 110128A: Swift detection of a burst
  30. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  31. GRB 110123A: Fermi GBM detection
  32. GRB 110106B, radio observations
  33. GRB 110120A: MASTER optical observations
  34. GRB 101224A, the review of the sky area in plate archives
  35. IPN triangulation of GRB 110120A
  36. GRB 101225A: CQUEAN optical observation
  37. GRB 110106A: CrAO optical observations
  38. GRB 110119A: Fermi GBM detection
  39. GRB 110120A: Fermi GBM detection
  40. GRB 110119A: Suzaku WAM observation of the prompt emission
  41. GRB 110112A: optical upper limit
  42. GRB110119: Swift/UVOT Detection
  43. GRB 110119A: Swift-XRT refined Analysis
  44. GRB110119A: MITSuME Okayama optical upper limits
  45. GRB 110119A: Swift-BAT refined analysis
  46. GRB 110119A: PAIRITEL NIR Afterglow Detection
  47. GRB 110119A: Enhanced Swift-XRT position
  48. GRB 110119A: Swift detection of a burst with an optical detection
  49. GRB110106A, mm-radio observations
  50. GRB 101219B: GROND detection of a SN signature
  51. Swift-BAT trigger 442771 is a noise fluctuation
  52. New feature in Fermi GBM GRB Ground Position Notices
  53. Swift-BAT Trigger 442539 is not a GRB
  54. Swift Trigger 442539 is probably not a GRB
  55. Short GRB 110112B : early optical limit by "Pi of the Sky"
  56. GRB101225A - timing analysis
  57. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  58. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  59. GRB 110107A: Swift-XRT afterglow confirmation
  60. GRB 101225A: HST observations - no host detected
  61. GRB 110112A: Swift-XRT refined Analysis
  62. GRB 110112A: Swift/UVOT upper limits
  63. GRB 110112A: WHT candidate afterglow/host galaxy
  64. GRB 110112A: Swift-BAT refined analysis
  65. GRB 110112A: Enhanced Swift-XRT position
  66. GRB110112A: TNT optical afterglow candidate
  67. GRB 110112A: Swift detection of a possible short burst
  68. GRB 110107A: Swift/UVOT upper limits
  69. GRB 101219b. Possible radio afterglow detection.
  70. GRB 110107A: Swift-XRT Afterglow Candidate
  71. GRB 110106B: Fermi GBM detection
  72. GRB 110106B: Swift-XRT refined Analysis
  73. GRB 110106A: TNG NIR observations
  74. GRB 110106A: ISAS-Kanazawa optical upper limit
  75. GRB 110106A: MITSuME Okayama optical upper limits
  76. GRB 110106B: Swift-BAT refined analysis
  77. GRB 110106B: Enhanced Swift-XRT position
  78. GRB 110106A: Swift/UVOT Upper Limits
  79. GRB 110106A: TNG redshift of the closeby galaxy
  80. GRB 110106A: Swift-XRT refined Analysis
  81. GRB 110106A: Swift-BAT refined analysis
  82. GRB 110106A: Enhanced Swift-XRT position
  83. GRB 110106B: Swift detection of a burst
  84. GRB 110106A: TNG optical observations and candidate counterparts
  85. GRB 110106A: Swift detection of a burst
  86. GRB 101225A: Host galaxy
  87. GRB 110102A: Swift-XRT refined Analysis
  88. GRB110102A: Swift/UVOT observations
  89. GRB110102A: MITSuME Okayama Optical Observation
  90. GRB 110102A: Fermi GBM observation
  91. GRB 110102A: Swift-BAT refined analysis
  92. GRB 110102A: Enhanced Swift-XRT position
  93. GRB 110102A: Swift detection of a burst with an optical detection
  94. GRB 101225A: optical break from NOT observation
  95. GRB 101225A: P60 Observations
  96. GRB 101225A: MAXI/GSC observations
  97. GRB 101225A Late-time emission observed by Swift-BAT
  98. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  99. GRB 101225A, Swift-BAT refined analysis
  100. GRB 101225A: Swift/UVOT Detection

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