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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"

36234 results found.

  1. GRB 111228A: Swift-XRT refined Analysis
  2. GRB 111228A: NOT redshift
  3. GRB111228A: TNG spectroscopy analysis
  4. FERMI GRB111228.45: MASTER observations
  5. GRB 111228A: Gemini South Redshift
  6. GRB 111228A: PAIRITEL NIR Detection
  7. GRB 111228A: MMT Redshift
  8. GRB 111228A: TAROT La Silla observatory observations
  9. GRB 111228A: GROND observations
  10. GRB 111228A: MASTER OT observations
  11. GRB111228A: Errata of MITSuME Okayama about GRB name in GCNC 12743
  12. GRB 111228A: GRAS017 optical observations
  13. GRB 111228A: IAC80 BVI-band observations
  14. GRB 111228A: Swift/UVOT Detection
  15. GRB 111228A: Skynet/Dolomiti Optical Observations
  16. GRB 111228A: NOT optical observation
  17. GRB 111228A, Swift-BAT refined analysis
  18. GRB 111228A: optical observations
  19. GRB 111228A: Enhanced Swift-XRT position
  20. GRB 111228A: TAROT Calern observatory. OT decay stopped
  21. GRB 111228A, optical observations
  22. GRB 111228A: Fermi GBM observation
  23. GRB111228A: MITSuME Okayama Optical Observation
  24. GRB 111228A: TAROT Calern observatory. OT seems still bright
  25. GRB 111228A: Possible host galaxy in the SDSS arhive
  26. GRB 111225A, optical observations
  27. XMM-Newton observation of the short GRB 111020A
  28. GRB 111228A: Xinglong TNT confirms the optical afterglow
  29. GRB 111228A: Swift detection of a burst with an optical counterpart
  30. GRB 111205A: optical observations
  31. GRB 111225A: Swift/UVOT Observations
  32. GRB 111215A: Keck/LRIS Imaging
  33. GRB 111225A: Keck/LRIS Afterglow Photometry
  34. GRB 111222A : Suzaku WAM observation of the prompt emission
  35. GRB 111225A: PAIRITEL NIR Upper Limits
  36. GRB111225A: MITSuME Okayama optical upper limits
  37. GRB 111225A: GRT Optical Observation
  38. GRB 111225A: 1.23m CAHA optical observations
  39. GRB 111225A: Swift-XRT refined Analysis
  40. GRB 111225A, Swift-BAT refined analysis
  41. GRBv111225A: Xinglong TNT optical afterglow
  42. GRB 111225A: Enhanced Swift-XRT position
  43. GRB 111225A: Super-LOTIS early detection
  44. GRB 111225A: TAROT Calern observatory optical detection
  45. GRB 111225A: TAROT Calern observatory optical observations
  46. GRB 111225A: Swift detection of a burst with an optical counterpart
  47. GRB111222A: GMG optical observation
  48. GRB 111222A: Xinglong TNT observation
  49. GRB 111222A: Swift/UVOT Observations
  50. GRB 111222A: Swift-XRT observations
  51. Konus-Wind observation of GRB 111222A
  52. IPN Triangulation of GRB 111222A (short/hard/intense)
  53. GRB 111210A: optical upper limit of Mt. Terskol observatory
  54. Trigger 510075 is not a GRB
  55. GRB 111215A: EVLA observations
  56. XRT GRB Catalogue now live and online
  57. GRB 111103B: optical upper limit
  58. GRB 110820A: optical observations in Maidanak observatory
  59. GRB 111103A: optical upper limit of Mt. Terskol observatory
  60. GRB 111215B: Suzaku WAM observation of the prompt emission
  61. GRB 111211A: optical ovservations at Mt. Terskol observatory
  62. GRB111215A: optical upper limit
  63. GRB 111215B: Swift/UVOT Upper Limits
  64. Konus-Wind observation of GRB 111215B
  65. GRB 111215B: Swift-XRT observations
  66. GRB 111205A: Confirmation of X-ray Afterglow
  67. IPN Triangulation of GRB 111215B (long/intense)
  68. GRB 111215A: WHT, LT and NOT imaging
  69. GRB 111215A: TNG K-band observations
  70. GRB 111215A: MITSuME Okayama Optical upper limits
  71. GRB 111215A: Swift/UVOT Upper Limits
  72. GRB 111215A: Swift-XRT refined Analysis
  73. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  74. GRB 111215A: Enhanced Swift-XRT position
  75. GRB 111215A: Swift-BAT refined analysis
  76. GRB 111215A: OSN I-band observations
  77. GRB 111215A: MASTER-Net optical prompt and follow up observations
  78. GRB 111215A, Optical Observations
  79. GRB 111215A: MITSuME Akeno Optical upper limits
  80. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  81. GRB 111215A: GMG optical upper limit
  82. GRB 111215A : Xinglong TNT upper limit
  83. GRB 111215A: Swift detection of a burst
  84. GRB 111201A, the review of the sky area in plate archive
  85. GRB 111212A: GROND observations
  86. GRB 111211A: Swift/UVOT Detection
  87. GRB 111211A: VLT/X-shooter redshift
  88. Konus-Wind observation of GRB 111211A
  89. GRB 111211A: NOT afterglow confirmation
  90. GRB 111212A: Swift-XRT refined Analysis
  91. GRB 111211A: Swift/XRT target of opportunity observation
  92. GRB 111212A: Swift/UVOT Upper Limits
  93. GRB 111212A: Swift-BAT refined analysis
  94. GRB 111212A: Enhanced Swift-XRT position
  95. GRB 111212A: Swift-XRT observations
  96. GRB 111211A: GROND afterglow candidate
  97. GRB 111212A: Swift detection of a burst
  98. GRB 111211A: SuperAGILE localization of a long GRB
  99. GRB 111210A: Xinglong TNT upper limit
  100. GRB 111209A - ATCA 34GHz upper limit

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