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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"

28234 results found.

  1. INTEGRAL Weak trigger #6433: GRT Optical Observation
  2. GRB 120106A: Swift-BAT refined analysis
  3. GRB 120106A: MITSuME Okayama Optical upper limits
  4. GRB 120106A: Enhanced Swift-XRT position
  5. GRB 120106A: TAROT Calern observatory optical observations
  6. GRB 120106A: Swift detection of a burst
  7. GRB111228A :LOAO R-band Observations
  8. GRB 111225A, the review of the sky area in plate archives
  9. GRB 111222A, the review of the sky area in plate archives
  10. GRB 111222A: Second Swift observation
  11. GRB 111211A: Detection of the SN with the 10.4m GTC
  12. GRB 120102A: Fermi GBM observation
  13. GRB 120102A: Swift-BAT refined analysis
  14. GRB 111228A: optical observations in CrAO
  15. GRB 120102A: Swift-XRT refined Analysis
  16. GRB 120102A: Swift/UVOT Detection
  17. GRB 120102A: Enhanced Swift-XRT position
  18. GRB 120102A: Swift detection of a burst with an optical counterpart
  19. GRB 111225A: optical observations in CrAO
  20. GRB 111228A: LOAO Optical Observation
  21. GRB 110915A, the review of the sky area in plate archives
  22. GRB 111229A: Swift/UVOT Detection
  23. GRB 111229A: Faulkes Telescope South observations
  24. GRB 111229A: Swift-XRT refined Analysis
  25. GRB 111229A: Enhanced Swift-XRT position
  26. GRB 111228A: Continued Skynet PROMPT/Dolomiti Optical Observations
  27. GRB 111229A: Gemini-South Redshift
  28. GRB 111229A: Swift-BAT refined analysis
  29. GRB 111229A: GROND afterglow candidate
  30. GRB 111229A: Swift detection of a burst
  31. GRB 111228A: Liverpool Telescope Observations
  32. GRB 111225A: Lightbuckets Optical Observations
  33. GRB 111228A: P60 Observations
  34. GRB 111228A: T100 observations
  35. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  36. GRB 111228A: GMG optical observation
  37. GRB 111228A: Swift-XRT refined Analysis
  38. FERMI GRB111228.45: MASTER observations
  39. GRB 111228A: PAIRITEL NIR Detection
  40. GRB 111228A: TAROT La Silla observatory observations
  41. GRB 111228A: GROND observations
  42. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  43. GRB 111228A: IAC80 BVI-band observations
  44. GRB 111228A: Swift/UVOT Detection
  45. GRB 111228A: Skynet/Dolomiti Optical Observations
  46. GRB 111228A: NOT optical observation
  47. GRB 111228A, Swift-BAT refined analysis
  48. GRB 111228A: optical observations
  49. GRB 111228A: Enhanced Swift-XRT position
  50. GRB 111228A: TAROT Calern observatory. OT decay stopped
  51. GRB 111228A, optical observations
  52. GRB 111228A: Fermi GBM observation
  53. GRB111228A: MITSuME Okayama Optical Observation
  54. GRB 111228A: TAROT Calern observatory. OT seems still bright
  55. GRB 111228A: Possible host galaxy in the SDSS arhive
  56. GRB 111225A, optical observations
  57. GRB 111228A: Swift detection of a burst with an optical counterpart
  58. GRB 111205A: optical observations
  59. GRB 111225A: Swift/UVOT Observations
  60. GRB 111215A: Keck/LRIS Imaging
  61. GRB 111225A: Keck/LRIS Afterglow Photometry
  62. GRB 111222A : Suzaku WAM observation of the prompt emission
  63. GRB 111225A: PAIRITEL NIR Upper Limits
  64. GRB111225A: MITSuME Okayama optical upper limits
  65. GRB 111225A: GRT Optical Observation
  66. GRB 111225A: 1.23m CAHA optical observations
  67. GRB 111225A: Swift-XRT refined Analysis
  68. GRB 111225A, Swift-BAT refined analysis
  69. GRB 111225A: Enhanced Swift-XRT position
  70. GRB 111225A: Super-LOTIS early detection
  71. GRB 111225A: TAROT Calern observatory optical detection
  72. GRB 111225A: TAROT Calern observatory optical observations
  73. GRB 111225A: Swift detection of a burst with an optical counterpart
  74. GRB111222A: GMG optical observation
  75. GRB 111222A: Swift-XRT observations
  76. IPN Triangulation of GRB 111222A (short/hard/intense)
  77. GRB 111210A: optical upper limit of Mt. Terskol observatory
  78. Trigger 510075 is not a GRB
  79. GRB 111103B: optical upper limit
  80. GRB 110820A: optical observations in Maidanak observatory
  81. GRB 111103A: optical upper limit of Mt. Terskol observatory
  82. GRB 111215B: Suzaku WAM observation of the prompt emission
  83. GRB 111211A: optical ovservations at Mt. Terskol observatory
  84. GRB111215A: optical upper limit
  85. GRB 111215B: Swift/UVOT Upper Limits
  86. GRB 111215B: Swift-XRT observations
  87. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  88. GRB 111215A: WHT, LT and NOT imaging
  89. GRB 111215A: TNG K-band observations
  90. GRB 111215A: MITSuME Okayama Optical upper limits
  91. GRB 111215A: Swift/UVOT Upper Limits
  92. GRB 111215A: Swift-XRT refined Analysis
  93. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  94. GRB 111215A: Enhanced Swift-XRT position
  95. GRB 111215A: Swift-BAT refined analysis
  96. GRB 111215A: OSN I-band observations
  97. GRB 111215A: MASTER-Net optical prompt and follow up observations
  98. GRB 111215A, Optical Observations
  99. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  100. GRB 111215A: GMG optical upper limit

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