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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"

19699 results found.

  1. GRB 111228A, optical observations
  2. GRB111228A: MITSuME Okayama Optical Observation
  3. GRB 111228A: TAROT Calern observatory. OT seems still bright
  4. GRB 111228A: Possible host galaxy in the SDSS arhive
  5. GRB 111225A, optical observations
  6. GRB 111228A: Swift detection of a burst with an optical counterpart
  7. GRB 111205A: optical observations
  8. GRB 111225A: Swift/UVOT Observations
  9. GRB 111215A: Keck/LRIS Imaging
  10. GRB 111225A: Keck/LRIS Afterglow Photometry
  11. GRB 111225A: PAIRITEL NIR Upper Limits
  12. GRB111225A: MITSuME Okayama optical upper limits
  13. GRB 111225A: GRT Optical Observation
  14. GRB 111225A: 1.23m CAHA optical observations
  15. GRB 111225A: Enhanced Swift-XRT position
  16. GRB 111225A: Super-LOTIS early detection
  17. GRB 111225A: TAROT Calern observatory optical detection
  18. GRB 111225A: TAROT Calern observatory optical observations
  19. GRB 111225A: Swift detection of a burst with an optical counterpart
  20. GRB111222A: GMG optical observation
  21. GRB 111222A: Swift-XRT observations
  22. IPN Triangulation of GRB 111222A (short/hard/intense)
  23. GRB 111210A: optical upper limit of Mt. Terskol observatory
  24. Trigger 510075 is not a GRB
  25. GRB 111103B: optical upper limit
  26. GRB 110820A: optical observations in Maidanak observatory
  27. GRB 111103A: optical upper limit of Mt. Terskol observatory
  28. GRB 111211A: optical ovservations at Mt. Terskol observatory
  29. GRB111215A: optical upper limit
  30. GRB 111215B: Swift/UVOT Upper Limits
  31. Konus-Wind observation of GRB 111215B
  32. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  33. GRB 111215A: WHT, LT and NOT imaging
  34. GRB 111215A: TNG K-band observations
  35. GRB 111215A: MITSuME Okayama Optical upper limits
  36. GRB 111215A: Swift/UVOT Upper Limits
  37. GRB 111215A: Enhanced Swift-XRT position
  38. GRB 111215A: OSN I-band observations
  39. GRB 111215A: MASTER-Net optical prompt and follow up observations
  40. GRB 111215A, Optical Observations
  41. GRB 111209A: RAPTOR Limits Before and During the Gamma-ray Emitting Interval
  42. GRB 111215A: GMG optical upper limit
  43. GRB 111215A: Swift detection of a burst
  44. GRB 111212A: GROND observations
  45. GRB 111211A: NOT afterglow confirmation
  46. GRB 111211A: Swift/XRT target of opportunity observation
  47. GRB 111212A: Swift/UVOT Upper Limits
  48. GRB 111212A: Enhanced Swift-XRT position
  49. GRB 111212A: Swift-XRT observations
  50. GRB 111211A: GROND afterglow candidate
  51. GRB 111210A: GROND observations
  52. GRB 111210A: SDSS prior imaging
  53. GRB 111210A: MITSuME Okayama Optical upper limits
  54. GRB 111208A: Swift-XRT refined analysis
  55. GRB 111210A: Gemini-North candidate counterpart
  56. GRB111210A: MITSuME Okayama J-band upper-limit
  57. GRB 111210A: Swift/UVOT Upper Limits
  58. GRB 111210A: Enhanced Swift-XRT position
  59. GRB 111210A: Swift detection of a burst
  60. GRB 111209A: GROND Afterglow observations
  61. GRB 111209A optical limit by "Pi of the Sky"
  62. GRB 111209A: PROMPT optical observations of early afterglow
  63. GRB 111208A: Lightbuckets Optical Observations
  64. GRB 111209A: Swift UVOT refined analysis
  65. GRB 111209A: Swift Burst of Interest
  66. GRB 111209A: Enhanced Swift-XRT position
  67. GRB 111205A: GROND observations
  68. GRB 111209A: REM NIR detection
  69. GRB 111209A: TAROT La Silla observatory optical detection
  70. GRB 111209A: Swift detection of a long burst with an optical counterpart
  71. GRB 111208A: Swift XRT/UVOT observations
  72. GRB 111205A: Swift XRT Observations
  73. Konus-Wind observation of GRB 111205A
  74. GRB 111204A: TNG NIR observations
  75. GRB 111201A: GMG optical observation
  76. GRB 111204A: GROND Observations
  77. GRB 111204A: Swift-XRT refined Analysis
  78. GRB 111022B: CrAO optical limit
  79. GRB 111204A: Swift/UVOT Upper Limits
  80. GRB 110921A: optical observations in Maidanak observatory
  81. GRB 111123A: optical upper limit in CrAO: correction to the GCN circ. 12613
  82. GRB 111204A: Enhanced Swift-XRT position
  83. GRB 111123A: optical upper limit in CrAO
  84. GRB 111204A: Swift detection of a burst
  85. GRB 111201A: Swift/UVOT Upper Limits
  86. GRB 111129A: Swift/UVOT Detection
  87. GRB 111129A, GROND afterglow observations
  88. GRB 111129A: Swift-XRT refined Analysis
  89. GRB 111126A Circular #12599 erratum
  90. GRB 111129A: Enhanced Swift-XRT position
  91. GRB 111129A: Swift detection of a burst with an optical counterpart
  92. GRB 111123A: Swift/UVOT Upper Limits
  93. GRB 111123A - NOT optical observations
  94. GRB 111123A, GROND observations
  95. GRB 111123A: TNG NIR detection of the afterglow candidate
  96. GRB 111123A: MITSuME Okayama Optical upper limits
  97. GRB 111123A: Enhanced Swift-XRT position
  98. GRB 111123A: GMG optical observation
  99. GRB 111117A: Refined Chandra Astrometry
  100. GRB 111123A: Swift detection of a burst

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