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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"

36401 results found.

  1. GRB 120308A : LOAO optical observation
  2. GRB 120308A: RTT150 optical observations
  3. GRB 120302A: RTT150 optical observations
  4. GRB 120308A: 1.23m CAHA I-band observations
  5. GRB 120308A: Further PAIRITEL NIR Observations
  6. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  7. GRB 120308A: Swift/UVOT Detection
  8. GRB 120308A: Swift-XRT refined Analysis
  9. GRB 120308A: Enhanced Swift-XRT position
  10. GRB 120308A: Swift-BAT refined analysis
  11. GRB 120308A: IAC80 I-band observations
  12. GRB 120308A: PAIRITEL NIR observations
  13. GRB 120308A: confirmation of the optical afterglow
  14. GRB 120308A: Liverpool Telescope optical afterglow candidate
  15. GRB 120308A: Swift detection of a burst
  16. GRB 120305A: D50 optical limits
  17. GRB 120305A: Swift spectral lag analysis
  18. GRB 120302A, the review of the sky area in plate archives
  19. GRB 120302A: Fermi GBM Observation
  20. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  21. GRB 120305A: Swift/UVOT Upper Limits
  22. GRB 120305A: EVLA deep limit on a radio counterpart
  23. GRB 120305A: Swift-XRT refined Analysis
  24. GRB 120305A: Enhanced Swift-XRT position
  25. GRB 120305A: Swift-BAT refined analysis
  26. GRB 120305A - Liverpool Telescope Observations
  27. GRB 120305A: MASTER-NET early optical observations
  28. GRB 120305A: Swift detection of a short burst
  29. GRB 120302A: GROND detection of an afterglow candidate
  30. GRB 120302A, Swift-BAT refined analysis
  31. GRB 111222A: Swift observation on 2012 February 06/07
  32. GRB 120302A found in ground analysis of BAT data
  33. GRB 120229A: Spectral lag analysis
  34. GRB 120229A, Swift-BAT refined analysis
  35. GRB 120229A: Swift detection of a short burst
  36. Konus-Wind observation of GRB 120226A
  37. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  38. GRB 120226A: Fermi-LAT data analysis
  39. IPN Triangulation of GRB 120226A
  40. GRB 120227A: RAPTOR Limit During the Gamma-Ray Emitting Interval
  41. GRB 120224A: VLT/X-shooter observations
  42. GRB 120224A: optical observation in Mondy observatory
  43. GRB 120226A: Fermi-LAT detection of a burst
  44. GRB 120224A: GROND detection of the afterglow candidate
  45. GRB 120219A, the review of the sky area in plate archives
  46. GRB 120224A: Swift-XRT refined Analysis
  47. GRB 120224A: Swift/UVOT Upper Limits
  48. GRB 120224A: Swift-BAT refined analysis
  49. GRB 120224A: FTN optical observations
  50. GRB 120224A: Enhanced Swift-XRT position
  51. GRB 120224A: Swift detection of a burst
  52. GRB_120215, the_review_of_the_sky_area_in_plate_archives
  53. GRB 1202019A: optical observation in Mondy observatory
  54. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  55. GRB 120219A: 1.23m CAHA optical observations
  56. GCN 12974 : Errata in the Subject
  57. GRB 120219A, optical observations
  58. GRB120219A: Keck Observations
  59. GRB 120215A: MITSuME Akeno Optical upper limits
  60. GRB 120219A: Swift-XRT refined Analysis
  61. GRB 120219A: Swift/UVOT Upper Limits
  62. GRB 120219A: MITSuME Okayama Optical upper limits
  63. GRB 120219A: Swift-BAT refined analysis
  64. GRB 120219A: Enhanced Swift-XRT position
  65. GRB120219A: TNT optical afterglow candidates
  66. GRB 120219A: MASTER-NET prompt and early optical observations
  67. GRB 120219A: Swift detection of a burst
  68. GRB 120218A: Swift-BAT refined analysis
  69. GRB 120218A: Swift detection of a burst
  70. GRB 120215A: Swift/UVOT Upper Limits
  71. GRB 120215A: MITSuME Okayama Optical upper limits
  72. GRB 120215A: Swift-XRT refined Analysis
  73. GRB 120215A: Enhanced Swift-XRT position
  74. Skynet/PROMPT observations of GRB120215A
  75. GRB 120215A: Swift-BAT refined analysis
  76. GRB 120215A: Swift detection of a burst
  77. GRB 120211A : LOAO optical observations
  78. GRB 120213A: Swift-XRT refined Analysis
  79. GRB 120213A: Swift/UVOT Upper Limits
  80. GRB 120212A: Fermi GBM observation
  81. GRB 120212A: GMG optical observation
  82. GRB 120213A: Enhanced Swift-XRT position
  83. GRB 120212A: MITSuME Ishigakijima Optical Observation
  84. GRB 120213A: Swift-BAT refined analysis
  85. GRB 120213A: MASTER-NET early optical observations
  86. GRB 120213A: Prompt enhanced Swift-XRT position
  87. GRB 120212A: Swift-XRT refined Analysis
  88. GRB 120213A: Swift detection of a burst
  89. GRB 120212A: NOT optical observation
  90. GRB 120212A: Swift/UVOT Detection
  91. GRB 120212A: Swift-BAT refined analysis
  92. GRB 120212A: Errata of subject in GCNC 12936
  93. GRB 120212A: Enhanced Swift-XRT position
  94. GRB 120211A: MITSuME Okayama Ks-band Observation
  95. GRB 120212A: Kanata/HOWPol optical observation
  96. GRB 120212A: Swift-XRT observations
  97. GRB 120212A: Swift/UVOT detection
  98. GRB 120212A: Faulkes Telescope South afterglow candidate
  99. GRB 120211A: GROND Upper limits
  100. GRB 120212A: Swift detection of a burst

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