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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"

45659 results found.

  1. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  2. GRB 110208A: Magellan confirmation of the optical afterglow
  3. Fermi GBM detection of a burst from 1E 1841-045
  4. Swift/UVOT observations of GRB110208a
  5. GRB 110205A: Suzaku WAM observation of the prompt emission
  6. GRB 110208A: Potential afterglow from Magellan
  7. GRB 110207A: Swift-XRT observations
  8. GRB 110208A: Swift-XRT refined Analysis
  9. GRB 110208A: Enhanced Swift-XRT position
  10. GRB 110208A: Swift-BAT refined analysis
  11. GRB 110208A: Magellan optical observations
  12. GRB 110206A: SMARTS optical/IR afterglow decay
  13. GRB 110208A: Swift detection of a burst
  14. SGR-like outburst from the magnetar 1E 1841-04.5
  15. GRB 110205A: optical observations in Mondy observatory
  16. GRB 110207A: Fermi GBM observation
  17. GRB 110205A : HCT optical observations
  18. GRB 110206A: Decay of afterglow candidate
  19. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  20. GRB 110207A: TAROT Calern observatory optical observations
  21. GRB 110205A - Continued PAIRITEL NIR Observations
  22. GRB 110206A: GROND detection of afterglow candidate
  23. GRB 110207A: Swift-BAT refined analysis
  24. GRB 110205A: WSRT radio observation
  25. GRB 110206A: UVOT detection of afterglow candidate
  26. GRB110205A: CARMA 3mm Observations
  27. GRB 110207A: MASTER prompt and early optical observations
  28. Konus-Wind observation of GRB 110205A
  29. GRB 110207A: Swift detection of a burst
  30. GRB 110206A: Swift detection of a probable X-ray afterglow
  31. GRB 110206A: TAROT La Silla observatory optical observations
  32. GRB 110205A: Lightbuckets Optical Observations
  33. GRB 110206A: a long GRB detected by INTEGRAL
  34. GRB 110205A : Lulin optical observation
  35. GRB110205A: MITSuME Ishigakijima Optical Observation
  36. GRB110205A: MITSuME Okayama Optical Observation
  37. GRB110205A: SMA 1.3mm Observations
  38. GRB 110205A: Swift/UVOT Continuing Observations
  39. GRB 110205A: Lulin optical observations and temporal decay index
  40. Observations GRB 110205A
  41. GRB 110205A: Swift-BAT refined analysis
  42. GRB 110205A: Newcastle Observatory Optical Observations
  43. GRB 110205A: Swift-XRT refined Analysis
  44. GRB 110205A: LOAO B/R Observation
  45. GRB 101225A is likely at z~0
  46. GRB 110205A: optical flare confirmation
  47. GRB 110205A: NOT redshift confirmation
  48. GRB 110205A: Enhanced Swift-XRT position
  49. GRB 110205A: FAST Redshift
  50. GRB 110205A: GRAS005 optical observations
  51. GRB 110205A: PAIRITEL NIR Afterglow Detection
  52. GRB 110205A: Possible Lick/Kast redshift
  53. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  54. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  55. GRB 110205A: TAROT Calern observatory detection of an optical flare
  56. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  57. GRB 110205A: TAROT Calern observatory optical detection
  58. GRB 110205A: Swift detection of a burst with an optical candidate
  59. GRB 110128A: Fermi GBM detection
  60. GRB 110201A: Swift-XRT refined Analysis
  61. GRB110201A: MITSuME Okayama optical upper limits
  62. Swift/UVOT observations of GRB110201A
  63. GRB 110201A: Swift-BAT refined analysis
  64. GRB 110201A: MASTER optical observations
  65. GRB 110201A: Swift detection of a burst
  66. GRB110112B: EVLA Observations
  67. GRB101224A: EVLA Observations
  68. GRB110112A: EVLA Observations
  69. GRB110128A: MITSuME Okayama optical upper limits
  70. GRB 110125A: Fermi GBM detection
  71. GRB 101112A: Maidanak and CrAO optical observations
  72. GRB110128A: TNG NIR observations
  73. GRB 110128A, Swift-BAT refined analysis
  74. GRB 110128A: TAROT-Calern refined analysis
  75. GRB 110128A: Swift/UVOT observations
  76. GRB 110128A: Swift-XRT refined Analysis
  77. GRB 110120A: Suzaku WAM observation of the prompt emission
  78. GRB 110128A: WHT redshifts of nearby field galaxies
  79. GRB 110128A: VLT/X-shooter redshift
  80. GRB 110128A: Enhanced Swift-XRT position
  81. GRB 110128A: Afterglow detection from NOT
  82. GRB 110128A: TAROT Calern observatory upper limits
  83. GRB 110128A: Swift detection of a burst
  84. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  85. Konus-Wind observation of GRB 110120A
  86. GRB 110123A: Fermi GBM detection
  87. GRB 110106B, radio observations
  88. GRB 110120A: MASTER optical observations
  89. GRB 110120A: Fermi LAT detection
  90. GRB 101224A, the review of the sky area in plate archives
  91. IPN triangulation of GRB 110120A
  92. GRB 101225A: CQUEAN optical observation
  93. GRB 110106A: CrAO optical observations
  94. GRB 110119A: Fermi GBM detection
  95. GRB 110120A: Fermi GBM detection
  96. GRB 110119A: Suzaku WAM observation of the prompt emission
  97. GRB 110112A: optical upper limit
  98. GRB 110120A: MASTER optical observations
  99. GRB110119: Swift/UVOT Detection
  100. GRB 110119A: Swift-XRT refined Analysis

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