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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"

36192 results found.

  1. GRB 120311A: Swift-XRT observations
  2. GRB 120311A: Liverpool Telescope optical candidate
  3. GRB 120311A: Swift detection of a burst
  4. GRB 120308A : LOAO optical observation
  5. GRB 120308A: RTT150 optical observations
  6. GRB 120302A: RTT150 optical observations
  7. GRB 120308A: 1.23m CAHA I-band observations
  8. GRB 120308A: Further PAIRITEL NIR Observations
  9. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  10. GRB 120308A: Swift/UVOT Detection
  11. GRB 120308A: Swift-XRT refined Analysis
  12. GRB 120308A: Enhanced Swift-XRT position
  13. GRB 120308A: Swift-BAT refined analysis
  14. GRB 120308A: IAC80 I-band observations
  15. GRB 120308A: PAIRITEL NIR observations
  16. GRB 120308A: confirmation of the optical afterglow
  17. GRB 120308A: Liverpool Telescope optical afterglow candidate
  18. GRB 120308A: Swift detection of a burst
  19. GRB 120305A: D50 optical limits
  20. GRB 120305A: Swift spectral lag analysis
  21. GRB 120302A, the review of the sky area in plate archives
  22. GRB 120302A: Fermi GBM Observation
  23. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  24. GRB 120305A: Swift/UVOT Upper Limits
  25. GRB 120305A: EVLA deep limit on a radio counterpart
  26. GRB 120305A: Swift-XRT refined Analysis
  27. GRB 120305A: Enhanced Swift-XRT position
  28. GRB 120305A: Swift-BAT refined analysis
  29. GRB 120305A - Liverpool Telescope Observations
  30. GRB 120305A: MASTER-NET early optical observations
  31. GRB 120305A: Swift detection of a short burst
  32. GRB 120302A: GROND detection of an afterglow candidate
  33. GRB 120302A, Swift-BAT refined analysis
  34. GRB 111222A: Swift observation on 2012 February 06/07
  35. GRB 120302A found in ground analysis of BAT data
  36. GRB 120229A: Spectral lag analysis
  37. GRB 120229A, Swift-BAT refined analysis
  38. GRB 120229A: Swift detection of a short burst
  39. Konus-Wind observation of GRB 120226A
  40. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  41. GRB 120226A: Fermi-LAT data analysis
  42. IPN Triangulation of GRB 120226A
  43. GRB 120227A: RAPTOR Limit During the Gamma-Ray Emitting Interval
  44. GRB 120224A: VLT/X-shooter observations
  45. GRB 120224A: optical observation in Mondy observatory
  46. GRB 120226A: Fermi-LAT detection of a burst
  47. GRB 120224A: GROND detection of the afterglow candidate
  48. GRB 120219A, the review of the sky area in plate archives
  49. GRB 120224A: Swift-XRT refined Analysis
  50. GRB 120224A: Swift/UVOT Upper Limits
  51. GRB 120224A: Swift-BAT refined analysis
  52. GRB 120224A: FTN optical observations
  53. GRB 120224A: Enhanced Swift-XRT position
  54. GRB 120224A: Swift detection of a burst
  55. GRB_120215, the_review_of_the_sky_area_in_plate_archives
  56. GRB 1202019A: optical observation in Mondy observatory
  57. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  58. GRB 120219A: 1.23m CAHA optical observations
  59. GCN 12974 : Errata in the Subject
  60. GRB 120219A, optical observations
  61. GRB120219A: Keck Observations
  62. GRB 120215A: MITSuME Akeno Optical upper limits
  63. GRB 120219A: Swift-XRT refined Analysis
  64. GRB 120219A: Swift/UVOT Upper Limits
  65. GRB 120219A: MITSuME Okayama Optical upper limits
  66. GRB 120219A: Swift-BAT refined analysis
  67. GRB 120219A: Enhanced Swift-XRT position
  68. GRB120219A: TNT optical afterglow candidates
  69. GRB 120219A: MASTER-NET prompt and early optical observations
  70. GRB 120219A: Swift detection of a burst
  71. GRB 120218A: Swift-BAT refined analysis
  72. GRB 120218A: Swift detection of a burst
  73. GRB 120215A: Swift/UVOT Upper Limits
  74. GRB 120215A: MITSuME Okayama Optical upper limits
  75. GRB 120215A: Swift-XRT refined Analysis
  76. GRB 120215A: Enhanced Swift-XRT position
  77. Skynet/PROMPT observations of GRB120215A
  78. GRB 120215A: Swift-BAT refined analysis
  79. GRB 120215A: Swift detection of a burst
  80. GRB 120211A : LOAO optical observations
  81. GRB 120213A: Swift-XRT refined Analysis
  82. GRB 120213A: Swift/UVOT Upper Limits
  83. GRB 120212A: Fermi GBM observation
  84. GRB 120212A: GMG optical observation
  85. GRB 120213A: Enhanced Swift-XRT position
  86. GRB 120212A: MITSuME Ishigakijima Optical Observation
  87. GRB 120213A: Swift-BAT refined analysis
  88. GRB 120213A: MASTER-NET early optical observations
  89. GRB 120213A: Prompt enhanced Swift-XRT position
  90. GRB 120212A: Swift-XRT refined Analysis
  91. GRB 120213A: Swift detection of a burst
  92. GRB 120212A: NOT optical observation
  93. GRB 120212A: Swift/UVOT Detection
  94. GRB 120212A: Swift-BAT refined analysis
  95. GRB 120212A: Errata of subject in GCNC 12936
  96. GRB 120212A: Enhanced Swift-XRT position
  97. GRB 120211A: MITSuME Okayama Ks-band Observation
  98. GRB 120212A: Kanata/HOWPol optical observation
  99. GRB 120212A: Swift-XRT observations
  100. GRB 120212A: Swift/UVOT detection

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