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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"

32711 results found.

  1. GRB 110112A: WHT candidate afterglow/host galaxy
  2. GRB 110112A: Swift-BAT refined analysis
  3. GRB 110106B: MASTER optical observations
  4. GRB110112A: TNT optical afterglow candidate
  5. GRB 110106B: early optical and near-IR observations
  6. GRB 110107A: Swift/UVOT upper limits
  7. GRB 101225a
  8. GRB 101219b. Possible radio afterglow detection.
  9. GRB 110106B: MASTER early optical observations
  10. GRB 110107A: Swift-BAT refined analysis
  11. GRB 101213A: Gemini-N galaxy redshift
  12. GRB 110106B: Fermi GBM detection
  13. Short GRB 110106A: MASTER OT observations
  14. GRB 110106B: Swift-XRT refined Analysis
  15. GRB 110106B: Gemini-North / WHT detection of a fading afterglow
  16. GRB 110106A: TNG NIR observations
  17. GRB 110106B Gemini-N galaxy redshift
  18. GRB 110106B: Liverpool Telescope observations
  19. GRB 110106A: ISAS-Kanazawa optical upper limit
  20. GRB 110106A: MITSuME Okayama optical upper limits
  21. GRB 110106B: WHT candidate afterglow
  22. GRB 110106B: Swift-BAT refined analysis
  23. GRB 110106A: Swift/UVOT Upper Limits
  24. GRB 110106A: TNG redshift of the closeby galaxy
  25. GRB 110106A: Swift-XRT refined Analysis
  26. GRB110106B: Xinglong TNT upper limit
  27. GRB 110106A: Swift-BAT refined analysis
  28. GRB 110106A: TNG optical observations and candidate counterparts
  29. GRB 110106A: MASTER optical observations
  30. GRB 101225A: Keck redshift
  31. GRB110106A: Xinglong TNT upper limit
  32. GRB 101225A: Host galaxy
  33. GRB 101219A: Gemini-North host redshift
  34. GRB 110102A: Swift-XRT refined Analysis
  35. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  36. Konus-Wind observation of GRB 110102A
  37. GRB110102A: Swift/UVOT observations
  38. GRB110102A: MITSuME Okayama Optical Observation
  39. GRB 110102A: Fermi GBM observation
  40. GRB 110102A: Swift-BAT refined analysis
  41. GRB 101225A: optical break from NOT observation
  42. GRB 101225A: MMT spectroscopy
  43. GRB 101225A: P60 Observations
  44. GRB 101225A: MAXI/GSC observations
  45. GRB 101225A Late-time emission observed by Swift-BAT
  46. GRB 101225: Optical follow-up of the Christmas burst
  47. GRB 101225A: WHT observations
  48. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  49. GRB 101225A, Swift-BAT refined analysis
  50. GRB 101225A: Swift/UVOT Detection
  51. GRB 101225A: Swift-XRT refined Analysis
  52. Trigger 441015 / GRB 101225A: Further NOT optical observation
  53. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  54. GRB 101225A (Swift trigger 441015): optical upper limit
  55. GRB 101224A: NOT optical observation
  56. GRB 101224A: Pre-event imaging from DeepSky; Detection of a source in the XRT error circle
  57. GRB 101224A: Swift/UVOT Upper Limits
  58. GRB 101224A: Fermi GBM observation
  59. GRB 101224A: Swift-XRT refined Analysis
  60. GRB101224A: MITSuME Okayama optical upper limits
  61. GRB 101224A, Swift-BAT refined analysis
  62. GRB 101224A - UVOT-enhanced XRT position
  63. GRB 101219A: Chandra Observations
  64. GRB 101219B: Swift/UVOT refined analysis
  65. GRB 101219B: Swift-XRT refined Analysis
  66. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  67. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  68. GRB 101219B: Fermi GBM observation
  69. GRB 101219A: IAC80 optical observations
  70. GRB 101219B: Swift-BAT refined analysis
  71. GRB 101219A: Swift-XRT refined Analysis
  72. GRB 101219A: Swift/UVOT Upper Limits
  73. GRB 101219A: GROND Upper limits
  74. Konus-Wind observation of short hard GRB 101219A
  75. GRB 101219A: Magellan NIR observations
  76. GRB 101219A: Further Gemini-South Imaging
  77. GRB 101219A: Swift-BAT refined analysis
  78. GRB 101219A - NOT observation - upper limit
  79. GRB 101219A: SARA-N Upper Limit
  80. GRB 101219A: Gemini-South observations
  81. GRB 101219A: REM optical and NIR observations
  82. GRB 101219A: ROTSE-III Optical Limits
  83. Request for Supernova related data for GRB 101023A
  84. GRB 101213A : Suzaku WAM observation of the prompt emission
  85. Redshift solution(s) for GRB101213A from Swift-XRT data
  86. Konus-Wind observation of GRB 101213A
  87. XRF 101117A, RIMOTS optical upper limits
  88. GRB 101213A: Fermi GBM observation
  89. GRB 101213A, Swift-BAT refined analysis
  90. GRB 101213A: Swift-XRT refined Analysis
  91. GRB 101213A: Swift/UVOT Upper Limits
  92. GRB 101213: object within the X-ray error circle
  93. GRB101204A: Swift/UVOT observations
  94. GRB 101204A: Swift-XRT refined Analysis
  95. GRB101204A GROND Detection of the Optical/NIR Afterglow
  96. GRB 101204A Afterglow Candidate, VATT Observations
  97. GRB 101204A Swift-XRT/UVOT afterglow candidate
  98. Konus-Wind observation of GRB 101130A
  99. Konus-Wind observation of GRB 101129A
  100. IPN Localization of GRB101130 (possible short duration burst)

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