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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"

19695 results found.

  1. GRB 111225A, optical observations
  2. GRB 111228A: Swift detection of a burst with an optical counterpart
  3. GRB 111205A: optical observations
  4. GRB 111225A: Swift/UVOT Observations
  5. GRB 111215A: Keck/LRIS Imaging
  6. GRB 111225A: Keck/LRIS Afterglow Photometry
  7. GRB 111225A: PAIRITEL NIR Upper Limits
  8. GRB111225A: MITSuME Okayama optical upper limits
  9. GRB 111225A: GRT Optical Observation
  10. GRB 111225A: 1.23m CAHA optical observations
  11. GRB 111225A: Enhanced Swift-XRT position
  12. GRB 111225A: Super-LOTIS early detection
  13. GRB 111225A: TAROT Calern observatory optical detection
  14. GRB 111225A: TAROT Calern observatory optical observations
  15. GRB 111225A: Swift detection of a burst with an optical counterpart
  16. GRB111222A: GMG optical observation
  17. GRB 111222A: Swift-XRT observations
  18. IPN Triangulation of GRB 111222A (short/hard/intense)
  19. GRB 111210A: optical upper limit of Mt. Terskol observatory
  20. Trigger 510075 is not a GRB
  21. GRB 111103B: optical upper limit
  22. GRB 110820A: optical observations in Maidanak observatory
  23. GRB 111103A: optical upper limit of Mt. Terskol observatory
  24. GRB 111211A: optical ovservations at Mt. Terskol observatory
  25. GRB111215A: optical upper limit
  26. GRB 111215B: Swift/UVOT Upper Limits
  27. Konus-Wind observation of GRB 111215B
  28. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  29. GRB 111215A: WHT, LT and NOT imaging
  30. GRB 111215A: TNG K-band observations
  31. GRB 111215A: MITSuME Okayama Optical upper limits
  32. GRB 111215A: Swift/UVOT Upper Limits
  33. GRB 111215A: Enhanced Swift-XRT position
  34. GRB 111215A: OSN I-band observations
  35. GRB 111215A: MASTER-Net optical prompt and follow up observations
  36. GRB 111215A, Optical Observations
  37. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  38. GRB 111215A: GMG optical upper limit
  39. GRB 111215A: Swift detection of a burst
  40. GRB 111212A: GROND observations
  41. GRB 111211A: NOT afterglow confirmation
  42. GRB 111211A: Swift/XRT target of opportunity observation
  43. GRB 111212A: Swift/UVOT Upper Limits
  44. GRB 111212A: Enhanced Swift-XRT position
  45. GRB 111212A: Swift-XRT observations
  46. GRB 111211A: GROND afterglow candidate
  47. GRB 111210A: GROND observations
  48. GRB 111210A: SDSS prior imaging
  49. GRB 111210A: MITSuME Okayama Optical upper limits
  50. GRB 111208A: Swift-XRT refined analysis
  51. GRB 111210A: Gemini-North candidate counterpart
  52. GRB111210A: MITSuME Okayama J-band upper-limit
  53. GRB 111210A: Swift/UVOT Upper Limits
  54. GRB 111210A: Enhanced Swift-XRT position
  55. GRB 111210A: Swift detection of a burst
  56. GRB 111209A: GROND Afterglow observations
  57. GRB 111209A optical limit by "Pi of the Sky"
  58. GRB 111209A: PROMPT optical observations of early afterglow
  59. GRB 111208A: Lightbuckets Optical Observations
  60. GRB 111209A: Swift UVOT refined analysis
  61. GRB 111209A: Swift Burst of Interest
  62. GRB 111209A: Enhanced Swift-XRT position
  63. GRB 111205A: GROND observations
  64. GRB 111209A: REM NIR detection
  65. GRB 111209A: TAROT La Silla observatory optical detection
  66. GRB 111209A: Swift detection of a long burst with an optical counterpart
  67. GRB 111208A: Swift XRT/UVOT observations
  68. GRB 111205A: Swift XRT Observations
  69. Konus-Wind observation of GRB 111205A
  70. GRB 111204A: TNG NIR observations
  71. GRB 111201A: GMG optical observation
  72. GRB 111204A: GROND Observations
  73. GRB 111204A: Swift-XRT refined Analysis
  74. GRB 111022B: CrAO optical limit
  75. GRB 111204A: Swift/UVOT Upper Limits
  76. GRB 110921A: optical observations in Maidanak observatory
  77. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  78. GRB 111204A: Enhanced Swift-XRT position
  79. GRB 111123A: optical upper limit in CrAO
  80. GRB 111204A: Swift detection of a burst
  81. GRB 111201A: Swift/UVOT Upper Limits
  82. GRB 111129A: Swift/UVOT Detection
  83. GRB 111129A, GROND afterglow observations
  84. GRB 111129A: Swift-XRT refined Analysis
  85. GRB 111126A Circular #12599 erratum
  86. GRB 111129A: Enhanced Swift-XRT position
  87. GRB 111129A: Swift detection of a burst with an optical counterpart
  88. GRB 111123A: Swift/UVOT Upper Limits
  89. GRB 111123A - NOT optical observations
  90. GRB 111123A, GROND observations
  91. GRB 111123A: TNG NIR detection of the afterglow candidate
  92. GRB 111123A: MITSuME Okayama Optical upper limits
  93. GRB 111123A: Enhanced Swift-XRT position
  94. GRB 111123A: GMG optical observation
  95. GRB 111117A: Refined Chandra Astrometry
  96. GRB 111123A: Swift detection of a burst
  97. GRB 111121A: Swift/UVOT Upper Limits
  98. GRB 111121A: Magellan/Megacam observations
  99. GRB 111117A: Chandra detection of the afterglow
  100. GRB 111121A: Enhanced Swift-XRT position

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