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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"

36311 results found.

  1. GRB 120116A: Swift detection of a burst
  2. GRB 120114A found in ground analysis of BAT data
  3. GRB 111228A: optical observations
  4. GRB 120106A: optical upper limit
  5. GRB 120107A: Suzaku WAM observation of the prompt emission
  6. GRB 110915B, the review of the sky area in plate archives
  7. GRB 120107A: Fermi GBM observation
  8. GRB 120106A: MITSuME Okayama Optical Observation (update)
  9. Konus-Wind observation of GRB 120107A
  10. IPN Triangulation of GRB 120107A
  11. GBM trigger 347620337 (GRB 120107A?) : High-energy photon emission in Fermi/LAT data
  12. GRB 120106A: Swift/UVOT Upper Limits
  13. GRB 120106A: Bassano Bresciano Observatory optical observations
  14. GRB 120106A: MITSuME Okayama Ks-band upper limit
  15. GRB 120106A: MASTER Early OT marginally detection
  16. GRB 120106A: Swift-XRT refined Analysis
  17. GRB 120106A: Swift-BAT refined analysis
  18. GRB 120106A: MITSuME Okayama Optical upper limits
  19. GRB 120106A: Enhanced Swift-XRT position
  20. GRB 120106A: TAROT Calern observatory optical observations
  21. GRB 120106A: MASTER-Tunka optical observations
  22. GRB 120106A: Swift detection of a burst
  23. GRB111228A :LOAO R-band Observations
  24. GRB 111225A, the review of the sky area in plate archives
  25. GRB 111222A, the review of the sky area in plate archives
  26. GRB 111222A: Fermi GBM observations
  27. GRB 111222A: Second Swift observation
  28. GRB111209A: ATCA detection at 5.5, 9, and 18GHz
  29. GRB111225A: RAPTOR Early Detection of the Optical Counterpart
  30. GRB 111211A: Detection of the SN with the 10.4m GTC
  31. GRB 120102A: Fermi GBM observation
  32. Konus-Wind observation of GRB 120102A
  33. GRB 120102A: Swift-BAT refined analysis
  34. GRB 111228A: optical observations in CrAO
  35. GRB 120102A: Swift-XRT refined Analysis
  36. GRB 120102A: Swift/UVOT Detection
  37. GRB 120102A: Enhanced Swift-XRT position
  38. GRB 120102A: Swift detection of a burst with an optical counterpart
  39. GRB 111225A: optical observations in CrAO
  40. GRB 111228A, optical observations
  41. GRB 111228A: LOAO Optical Observation
  42. Konus-Wind observation of GRB 111228A
  43. GRB 111228A: MASTER-Net optical photometry
  44. GRB 111228A: correction for GCN 12787
  45. GRB 111228A: Optical and NIR observations with Kanata telescope
  46. GRB 110915A, the review of the sky area in plate archives
  47. GRB 111228A: correction to GCN 12784
  48. GRB 111228A: SMARTS optical/IR afterglow observations
  49. GRB 111229A: Swift/UVOT Detection
  50. GRB 111229A: Faulkes Telescope South observations
  51. GRB 111229A: Swift-XRT refined Analysis
  52. GRB 111229A: Enhanced Swift-XRT position
  53. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  54. GRB111228A: Further GMG observations
  55. GRB 111229A: Gemini-South Redshift
  56. GRB 111229A: Swift-BAT refined analysis
  57. GRB 111229A: GROND afterglow candidate
  58. GRB 111229A: Swift detection of a burst
  59. GRB 111228A: Liverpool Telescope Observations
  60. GRB 111225A: Lightbuckets Optical Observations
  61. GRB 111228A: P60 Observations
  62. GRB 111228A: X-shooter spectroscopy
  63. GRB 111228A: T100 observations
  64. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  65. GRB 111228A: GMG optical observation
  66. GRB 111228A: Swift-XRT refined Analysis
  67. GRB 111228A: NOT redshift
  68. GRB111228A: TNG spectroscopy analysis
  69. FERMI GRB111228.45: MASTER observations
  70. GRB 111228A: Gemini South Redshift
  71. GRB 111228A: PAIRITEL NIR Detection
  72. GRB 111228A: MMT Redshift
  73. GRB 111228A: TAROT La Silla observatory observations
  74. GRB 111228A: GROND observations
  75. GRB 111228A: MASTER OT observations
  76. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  77. GRB 111228A: GRAS017 optical observations
  78. GRB 111228A: IAC80 BVI-band observations
  79. GRB 111228A: Swift/UVOT Detection
  80. GRB 111228A: Skynet/Dolomiti Optical Observations
  81. GRB 111228A: NOT optical observation
  82. GRB 111228A, Swift-BAT refined analysis
  83. GRB 111228A: optical observations
  84. GRB 111228A: Enhanced Swift-XRT position
  85. GRB 111228A: TAROT Calern observatory. OT decay stopped
  86. GRB 111228A, optical observations
  87. GRB 111228A: Fermi GBM observation
  88. GRB111228A: MITSuME Okayama Optical Observation
  89. GRB 111228A: TAROT Calern observatory. OT seems still bright
  90. GRB 111228A: Possible host galaxy in the SDSS arhive
  91. GRB 111225A, optical observations
  92. XMM-Newton observation of the short GRB 111020A
  93. GRB 111228A: Xinglong TNT confirms the optical afterglow
  94. GRB 111228A: Swift detection of a burst with an optical counterpart
  95. GRB 111205A: optical observations
  96. GRB 111225A: Swift/UVOT Observations
  97. GRB 111215A: Keck/LRIS Imaging
  98. GRB 111225A: Keck/LRIS Afterglow Photometry
  99. GRB 111222A : Suzaku WAM observation of the prompt emission
  100. GRB 111225A: PAIRITEL NIR Upper Limits

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