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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"

28289 results found.

  1. GRB 111228A: NOT optical observation
  2. GRB 111228A, Swift-BAT refined analysis
  3. GRB 111228A: optical observations
  4. GRB 111228A: Enhanced Swift-XRT position
  5. GRB 111228A: TAROT Calern observatory. OT decay stopped
  6. GRB 111228A, optical observations
  7. GRB 111228A: Fermi GBM observation
  8. GRB111228A: MITSuME Okayama Optical Observation
  9. GRB 111228A: TAROT Calern observatory. OT seems still bright
  10. GRB 111228A: Possible host galaxy in the SDSS arhive
  11. GRB 111225A, optical observations
  12. GRB 111228A: Swift detection of a burst with an optical counterpart
  13. GRB 111205A: optical observations
  14. GRB 111225A: Swift/UVOT Observations
  15. GRB 111215A: Keck/LRIS Imaging
  16. GRB 111225A: Keck/LRIS Afterglow Photometry
  17. GRB 111222A : Suzaku WAM observation of the prompt emission
  18. GRB 111225A: PAIRITEL NIR Upper Limits
  19. GRB111225A: MITSuME Okayama optical upper limits
  20. GRB 111225A: GRT Optical Observation
  21. GRB 111225A: 1.23m CAHA optical observations
  22. GRB 111225A: Swift-XRT refined Analysis
  23. GRB 111225A, Swift-BAT refined analysis
  24. GRB 111225A: Enhanced Swift-XRT position
  25. GRB 111225A: Super-LOTIS early detection
  26. GRB 111225A: TAROT Calern observatory optical detection
  27. GRB 111225A: TAROT Calern observatory optical observations
  28. GRB 111225A: Swift detection of a burst with an optical counterpart
  29. GRB111222A: GMG optical observation
  30. GRB 111222A: Swift-XRT observations
  31. IPN Triangulation of GRB 111222A (short/hard/intense)
  32. GRB 111210A: optical upper limit of Mt. Terskol observatory
  33. Trigger 510075 is not a GRB
  34. GRB 111103B: optical upper limit
  35. GRB 110820A: optical observations in Maidanak observatory
  36. GRB 111103A: optical upper limit of Mt. Terskol observatory
  37. GRB 111215B: Suzaku WAM observation of the prompt emission
  38. GRB 111211A: optical ovservations at Mt. Terskol observatory
  39. GRB111215A: optical upper limit
  40. GRB 111215B: Swift/UVOT Upper Limits
  41. GRB 111215B: Swift-XRT observations
  42. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  43. GRB 111215A: WHT, LT and NOT imaging
  44. GRB 111215A: TNG K-band observations
  45. GRB 111215A: MITSuME Okayama Optical upper limits
  46. GRB 111215A: Swift/UVOT Upper Limits
  47. GRB 111215A: Swift-XRT refined Analysis
  48. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  49. GRB 111215A: Enhanced Swift-XRT position
  50. GRB 111215A: Swift-BAT refined analysis
  51. GRB 111215A: OSN I-band observations
  52. GRB 111215A: MASTER-Net optical prompt and follow up observations
  53. GRB 111215A, Optical Observations
  54. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  55. GRB 111215A: GMG optical upper limit
  56. GRB 111215A: Swift detection of a burst
  57. GRB 111201A, the review of the sky area in plate archive
  58. GRB 111212A: GROND observations
  59. Konus-Wind observation of GRB 111211A
  60. GRB 111211A: NOT afterglow confirmation
  61. GRB 111212A: Swift-XRT refined Analysis
  62. GRB 111211A: Swift/XRT target of opportunity observation
  63. GRB 111212A: Swift/UVOT Upper Limits
  64. GRB 111212A: Swift-BAT refined analysis
  65. GRB 111212A: Enhanced Swift-XRT position
  66. GRB 111212A: Swift-XRT observations
  67. GRB 111211A: GROND afterglow candidate
  68. GRB 111211A: SuperAGILE localization of a long GRB
  69. Konus-Wind observation of GRB 111209A
  70. GRB 111210A: GROND observations
  71. GRB 111210A: SDSS prior imaging
  72. GRB 111210A: Swift-XRT refined Analysis
  73. GRB 111210A: MITSuME Okayama Optical upper limits
  74. GRB 111208A: Swift-XRT refined analysis
  75. GRB 111210A: Gemini-North candidate counterpart
  76. GRB111210A: MITSuME Okayama J-band upper-limit
  77. GRB 111210A: Swift/UVOT Upper Limits
  78. GRB 111210A: Enhanced Swift-XRT position
  79. GRB 111210A: Swift-BAT refined analysis
  80. GRB 111210A: Swift detection of a burst
  81. GRB 111209A: VLT/X-shooter redshift
  82. GRB 111209A: GROND Afterglow observations
  83. GRB 111209A optical limit by "Pi of the Sky"
  84. GRB 111209A: PROMPT optical observations of early afterglow
  85. GRB 111208A: Lightbuckets Optical Observations
  86. GRB 111209A: Swift-XRT refined Analysis
  87. GRB 111209A: Swift UVOT refined analysis
  88. GRB 111209A: Swift Burst of Interest
  89. GRB 111209A, Swift-BAT refined analysis
  90. GRB 111209A: Enhanced Swift-XRT position
  91. GRB 111205A: GROND observations
  92. GRB 111209A: REM NIR detection
  93. GRB 111209A: TAROT La Silla observatory optical detection
  94. GRB 111209A: Swift detection of a long burst with an optical counterpart
  95. GRB 111208A: Swift XRT/UVOT observations
  96. GRB 111205A: Swift XRT Observations
  97. GRB 111207A found in ground analysis of BAT data
  98. GRB 111208A found in ground analysis of BAT data
  99. GRB 111204A: TNG NIR observations
  100. GRB 111201A: GMG optical observation

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