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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"

37907 results found.

  1. GRB 060507: BART limit
  2. GRB 060507: Final Refined analysis of the Swift-BAT burst
  3. GRB 060507: Swift-BAT Refined Analysis
  4. GRB 060505: PROMPT Observations
  5. GRB 060507: Swift/UVOT Upper Limits
  6. GRB 060507: Swift XRT Team Refined Analysis
  7. GRB 060507: MDM Optical Upper Limit
  8. GRB060507: Swift XRT position
  9. GRB 060507: Swift detection of a burst
  10. GRB 060429: Suzaku WAM observation
  11. GRB060505: Swift/UVOT Observations
  12. GRB 060505: Swift XRT Team Refined Analysis
  13. GRB060425: new MASTER survey method
  14. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  15. GRB 060505: Swift XRT afterglow canditate position
  16. GRB 060502b: Second epoch Gemini observations
  17. GRB 060505: Swift-BAT detection of a weak burst
  18. GRB 060428B: spectroscopy
  19. GRB 060502B: optical observations
  20. GRB 060502B: AROMA refined photometric calibration
  21. GRB 060502B MDM Follow-up Observation
  22. GRB 060502b: Gemini imaging and spectroscopy
  23. GRB060502A, optical observation
  24. GRB 060502B: Swift/UVOT upper limits
  25. GRB 060502A: Swift/UVOT source detection
  26. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  27. GRB 060502B: MDM Optical Observation
  28. GRB 060502B: AROMA optical observations
  29. GRB 060502B: Refined analysis of the Swift-BAT short burst
  30. GRB060502B: Swift XRT Team refined analysis
  31. Short GRB 060502B: Tautenburg Observation
  32. GRB 060427B Milagro GeV/TeV Observations
  33. GRB 060502A: TTT Observations
  34. GRB060502B: correction to XRT position
  35. GRB 060501: P60 Observations and Candidate Retraction
  36. GRB 060502B: Xinglong optical observation
  37. GRB 060502B: MASTER optical observations
  38. GRB 060502B: Swift detection of a short burst
  39. GRB060502: Swift-XRT refined analysis
  40. GRB 060502: Swift-BAT refined analysis
  41. GRB060502: Gemini spectroscopy
  42. GRB 060502: APO Spectroscopic Observations
  43. GRB060501: Swift UVOT followup observations
  44. GRB060502: Super-LOTIS Observations
  45. GRB 060502: P60 Afterglow Confirmation
  46. GRB 060502: Swift detection of a burst with an optical counterpart
  47. GRB 060501: MDM Observations
  48. GRB060501: Super-LOTIS observations
  49. GRB060501: P60 imaging and afterglow candidate
  50. GRB 060501: Refined analysis of the Swift-BAT burst
  51. GRB060501: Swift XRT position
  52. GRB 060501: ROTSE-III Optical Limits
  53. GRB 060501: Swift detection of a burst
  54. IPN triangulation of GRB060429 (short/hard)
  55. Konus-Wind observation of GRB 060427B
  56. GRB060428B - SDSS Pre-Burst Observations
  57. GRB060428B: optical observation
  58. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  59. GRB 060428B: MDM Observations
  60. GRB 060428A: PROMPT Observations
  61. GRB 060427B: MASTER optical observations
  62. GRB060428B: Swift XRT Team refined analysis
  63. GRB 060427B: IPN localization of a short hard burst
  64. GRB 060428B: Refined analysis of the Swift-BAT burst
  65. GRB 060428B: Xinglong I-band limit
  66. GRB 060428B: KAIT observations
  67. GRB060425:MASTER optical limit
  68. GRB 051117A: Bright host galaxy not confirmed
  69. GRB060428A: Swift/UVOT observations.
  70. GRB060428B, optical observation
  71. GRB 060428A: Refined analysis of the Swift-BAT burst
  72. GRB 060428b : Kiso R-band limit
  73. GRB060427:MASTER optical limit
  74. GRB 060428b: Optical afterglow candidate
  75. GRB060428A: Swift XRT Team refined analysis
  76. GRB 060428B: Swift detection of a burst
  77. GRB 060427: NIR observations
  78. GRB 060428: Swift detection of a burst
  79. GRB 060427: NOT observations
  80. GRB 060427: Swift/UVOT upper limits.
  81. GRB 060427: Refined analysis of the Swift-BAT burst
  82. GRB060427: Swift XRT Team refined analysis
  83. GRB060418: Swift XRT Team Further Refined Analysis
  84. GRB060425:MASTER survey observations
  85. GRB 060427, optical observation
  86. GRB 060427: Swift detection of a burst
  87. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  88. An interactive program for GRB pseudo-redshift computations
  89. GRB060424: optical afterglow detection
  90. GRB060418: Further Analysis of MIKE Spectroscopy
  91. GRB 060424: Refined analysis of the Swift-BAT burst
  92. GRB 060424: Swift detection of a burst
  93. GRB 060421: TTT Observations
  94. Swift-BAT detection of Mrk 421
  95. GRB060421: Swift/UVOT observations
  96. GRB 060421: Swift-BAT Refined Analysis
  97. GRB 060421: Swift-XRT refined analysis
  98. GRB 060418: prediction of t_break
  99. GRB060418: optical observations
  100. Konus-Wind observation of GRB 060418

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