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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"

28249 results found.

  1. GRB 120116A: Bassano Bresciano Observatory optical observations
  2. GRB 120116A: Swift detection of a burst
  3. GRB 120114A found in ground analysis of BAT data
  4. GRB 111228A: optical observations
  5. AXP 4U 0142+61: Swift-BAT refined analysis (trigger 511611)
  6. GRB 120106A: optical upper limit
  7. Swift detection of an SGR burst from AXP 4U 0142+61
  8. GRB 120107A: Suzaku WAM observation of the prompt emission
  9. GRB 110915B, the review of the sky area in plate archives
  10. GRB 120107A: Fermi GBM observation
  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: Swift-XRT refined Analysis
  16. INTEGRAL Weak trigger #6433: GRT Optical Observation
  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: Swift detection of a burst
  22. GRB111228A :LOAO R-band Observations
  23. GRB 111225A, the review of the sky area in plate archives
  24. GRB 111222A, the review of the sky area in plate archives
  25. GRB 111222A: Second Swift observation
  26. GRB 111211A: Detection of the SN with the 10.4m GTC
  27. GRB 120102A: Fermi GBM observation
  28. GRB 120102A: Swift-BAT refined analysis
  29. GRB 111228A: optical observations in CrAO
  30. GRB 120102A: Swift-XRT refined Analysis
  31. GRB 120102A: Swift/UVOT Detection
  32. GRB 120102A: Enhanced Swift-XRT position
  33. GRB 120102A: Swift detection of a burst with an optical counterpart
  34. GRB 111225A: optical observations in CrAO
  35. GRB 111228A: LOAO Optical Observation
  36. GRB 110915A, the review of the sky area in plate archives
  37. GRB 111229A: Swift/UVOT Detection
  38. GRB 111229A: Faulkes Telescope South observations
  39. GRB 111229A: Swift-XRT refined Analysis
  40. GRB 111229A: Enhanced Swift-XRT position
  41. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  42. GRB 111229A: Gemini-South Redshift
  43. GRB 111229A: Swift-BAT refined analysis
  44. GRB 111229A: GROND afterglow candidate
  45. GRB 111229A: Swift detection of a burst
  46. GRB 111228A: Liverpool Telescope Observations
  47. GRB 111225A: Lightbuckets Optical Observations
  48. GRB 111228A: P60 Observations
  49. GRB 111228A: T100 observations
  50. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  51. GRB 111228A: GMG optical observation
  52. GRB 111228A: Swift-XRT refined Analysis
  53. FERMI GRB111228.45: MASTER observations
  54. GRB 111228A: PAIRITEL NIR Detection
  55. GRB 111228A: TAROT La Silla observatory observations
  56. GRB 111228A: GROND observations
  57. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  58. GRB 111228A: IAC80 BVI-band observations
  59. GRB 111228A: Swift/UVOT Detection
  60. GRB 111228A: Skynet/Dolomiti Optical Observations
  61. GRB 111228A: NOT optical observation
  62. GRB 111228A, Swift-BAT refined analysis
  63. GRB 111228A: optical observations
  64. GRB 111228A: Enhanced Swift-XRT position
  65. GRB 111228A: TAROT Calern observatory. OT decay stopped
  66. GRB 111228A, optical observations
  67. GRB 111228A: Fermi GBM observation
  68. GRB111228A: MITSuME Okayama Optical Observation
  69. GRB 111228A: TAROT Calern observatory. OT seems still bright
  70. GRB 111228A: Possible host galaxy in the SDSS arhive
  71. GRB 111225A, optical observations
  72. GRB 111228A: Swift detection of a burst with an optical counterpart
  73. GRB 111205A: optical observations
  74. GRB 111225A: Swift/UVOT Observations
  75. GRB 111215A: Keck/LRIS Imaging
  76. GRB 111225A: Keck/LRIS Afterglow Photometry
  77. GRB 111222A : Suzaku WAM observation of the prompt emission
  78. GRB 111225A: PAIRITEL NIR Upper Limits
  79. GRB111225A: MITSuME Okayama optical upper limits
  80. GRB 111225A: GRT Optical Observation
  81. GRB 111225A: 1.23m CAHA optical observations
  82. GRB 111225A: Swift-XRT refined Analysis
  83. GRB 111225A, Swift-BAT refined analysis
  84. GRB 111225A: Enhanced Swift-XRT position
  85. GRB 111225A: Super-LOTIS early detection
  86. GRB 111225A: TAROT Calern observatory optical detection
  87. GRB 111225A: TAROT Calern observatory optical observations
  88. GRB 111225A: Swift detection of a burst with an optical counterpart
  89. GRB111222A: GMG optical observation
  90. GRB 111222A: Swift-XRT observations
  91. IPN Triangulation of GRB 111222A (short/hard/intense)
  92. GRB 111210A: optical upper limit of Mt. Terskol observatory
  93. Trigger 510075 is not a GRB
  94. GRB 111103B: optical upper limit
  95. GRB 110820A: optical observations in Maidanak observatory
  96. GRB 111103A: optical upper limit of Mt. Terskol observatory
  97. GRB 111215B: Suzaku WAM observation of the prompt emission
  98. GRB 111211A: optical ovservations at Mt. Terskol observatory
  99. GRB111215A: optical upper limit
  100. GRB 111215B: Swift/UVOT Upper Limits

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