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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"

28300 results found.

  1. GRB111228A: MITSuME Akeno photometry of the optical afterglow
  2. GRB 111228A: GMG optical observation
  3. GRB 111228A: Swift-XRT refined Analysis
  4. FERMI GRB111228.45: MASTER observations
  5. GRB 111228A: PAIRITEL NIR Detection
  6. GRB 111228A: TAROT La Silla observatory observations
  7. GRB 111228A: GROND observations
  8. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  9. GRB 111228A: IAC80 BVI-band observations
  10. GRB 111228A: Swift/UVOT Detection
  11. GRB 111228A: Skynet/Dolomiti Optical Observations
  12. GRB 111228A: NOT optical observation
  13. GRB 111228A, Swift-BAT refined analysis
  14. GRB 111228A: optical observations
  15. GRB 111228A: Enhanced Swift-XRT position
  16. GRB 111228A: TAROT Calern observatory. OT decay stopped
  17. GRB 111228A, optical observations
  18. GRB 111228A: Fermi GBM observation
  19. GRB111228A: MITSuME Okayama Optical Observation
  20. GRB 111228A: TAROT Calern observatory. OT seems still bright
  21. GRB 111228A: Possible host galaxy in the SDSS arhive
  22. GRB 111225A, optical observations
  23. GRB 111228A: Swift detection of a burst with an optical counterpart
  24. GRB 111205A: optical observations
  25. GRB 111225A: Swift/UVOT Observations
  26. GRB 111215A: Keck/LRIS Imaging
  27. GRB 111225A: Keck/LRIS Afterglow Photometry
  28. GRB 111222A : Suzaku WAM observation of the prompt emission
  29. GRB 111225A: PAIRITEL NIR Upper Limits
  30. GRB111225A: MITSuME Okayama optical upper limits
  31. GRB 111225A: GRT Optical Observation
  32. GRB 111225A: 1.23m CAHA optical observations
  33. GRB 111225A: Swift-XRT refined Analysis
  34. GRB 111225A, Swift-BAT refined analysis
  35. GRB 111225A: Enhanced Swift-XRT position
  36. GRB 111225A: Super-LOTIS early detection
  37. GRB 111225A: TAROT Calern observatory optical detection
  38. GRB 111225A: TAROT Calern observatory optical observations
  39. GRB 111225A: Swift detection of a burst with an optical counterpart
  40. GRB111222A: GMG optical observation
  41. GRB 111222A: Swift-XRT observations
  42. IPN Triangulation of GRB 111222A (short/hard/intense)
  43. GRB 111210A: optical upper limit of Mt. Terskol observatory
  44. Trigger 510075 is not a GRB
  45. GRB 111103B: optical upper limit
  46. GRB 110820A: optical observations in Maidanak observatory
  47. GRB 111103A: optical upper limit of Mt. Terskol observatory
  48. GRB 111215B: Suzaku WAM observation of the prompt emission
  49. GRB 111211A: optical ovservations at Mt. Terskol observatory
  50. GRB111215A: optical upper limit
  51. GRB 111215B: Swift/UVOT Upper Limits
  52. GRB 111215B: Swift-XRT observations
  53. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  54. GRB 111215A: WHT, LT and NOT imaging
  55. GRB 111215A: TNG K-band observations
  56. GRB 111215A: MITSuME Okayama Optical upper limits
  57. GRB 111215A: Swift/UVOT Upper Limits
  58. GRB 111215A: Swift-XRT refined Analysis
  59. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  60. GRB 111215A: Enhanced Swift-XRT position
  61. GRB 111215A: Swift-BAT refined analysis
  62. GRB 111215A: OSN I-band observations
  63. GRB 111215A: MASTER-Net optical prompt and follow up observations
  64. GRB 111215A, Optical Observations
  65. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  66. GRB 111215A: GMG optical upper limit
  67. GRB 111215A: Swift detection of a burst
  68. GRB 111201A, the review of the sky area in plate archive
  69. GRB 111212A: GROND observations
  70. Konus-Wind observation of GRB 111211A
  71. GRB 111211A: NOT afterglow confirmation
  72. GRB 111212A: Swift-XRT refined Analysis
  73. GRB 111211A: Swift/XRT target of opportunity observation
  74. GRB 111212A: Swift/UVOT Upper Limits
  75. GRB 111212A: Swift-BAT refined analysis
  76. GRB 111212A: Enhanced Swift-XRT position
  77. GRB 111212A: Swift-XRT observations
  78. GRB 111211A: GROND afterglow candidate
  79. GRB 111211A: SuperAGILE localization of a long GRB
  80. Konus-Wind observation of GRB 111209A
  81. GRB 111210A: GROND observations
  82. GRB 111210A: SDSS prior imaging
  83. GRB 111210A: Swift-XRT refined Analysis
  84. GRB 111210A: MITSuME Okayama Optical upper limits
  85. GRB 111208A: Swift-XRT refined analysis
  86. GRB 111210A: Gemini-North candidate counterpart
  87. GRB111210A: MITSuME Okayama J-band upper-limit
  88. GRB 111210A: Swift/UVOT Upper Limits
  89. GRB 111210A: Enhanced Swift-XRT position
  90. GRB 111210A: Swift-BAT refined analysis
  91. GRB 111210A: Swift detection of a burst
  92. GRB 111209A: VLT/X-shooter redshift
  93. GRB 111209A: GROND Afterglow observations
  94. GRB 111209A optical limit by "Pi of the Sky"
  95. GRB 111209A: PROMPT optical observations of early afterglow
  96. GRB 111208A: Lightbuckets Optical Observations
  97. GRB 111209A: Swift-XRT refined Analysis
  98. GRB 111209A: Swift UVOT refined analysis
  99. GRB 111209A: Swift Burst of Interest
  100. GRB 111209A, Swift-BAT refined analysis

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