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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"

26519 results found.

  1. GRB 060516: Refined analysis of the Swift-BAT burst
  2. GRB 060512: TNG optical spectroscopy
  3. GRB 060505 BAT refined analysis
  4. GRB 060515 BAT refined analysis
  5. GRB 060512: TAROT optical observation
  6. GRB 060515: Swift/XRT Team refined analysis
  7. GRB 060515: Swift/XRT position
  8. GRB 060515: Super-LOTIS Observations
  9. GRB 060515: TAROT optical observation
  10. VLT optical spectroscopy of GRB 060512
  11. GRB 060512: Subaru NIR observation
  12. GRB060512: Swift XRT Team refined analysis
  13. GRB 060512: 1.54m Kuiper Observations
  14. GRB 060512: Detection of NIR afterglow
  15. GRB 060512: P60 Observations
  16. GRB 060512: Swift-BAT Refined Analysis
  17. GRB 060512: optical decay
  18. GRB 060512: REM NIR observations
  19. GRB060512 - SDSS Pre-Burst Observations
  20. Konus-Wind observation of GRB 060510A
  21. GRB060418: optical observations
  22. GRB 060428a, SMARTS optical/IR afterglow detection
  23. GRB060510B: Swift XRT refined analysis
  24. GRB 060510A: Refined analysis of the Swift-BAT burst
  25. GRB 060510B: Swift-BAT Refined Analysis
  26. GRB060510A: XRT refined analysis
  27. GRB060510 - SDSS Pre-Burst Observations
  28. GRB060510B : Faulkes North Telescope detection
  29. GRB 060510B: Super-LOTIS Observations
  30. GRB 060510: Swift detection of a burst with optical transient
  31. GRB 060507: Final Refined analysis of the Swift-BAT burst
  32. GRB 060507: Swift-BAT Refined Analysis
  33. GRB 060429: Suzaku WAM observation
  34. GRB060425: new MASTER survey method
  35. GRB 060306: Further Analysis of SOAR and APO NIR Observations
  36. GRB 060502B: AROMA refined photometric calibration
  37. GRB 060502b: Gemini imaging and spectroscopy
  38. GRB 060502A: Swift/UVOT source detection
  39. GRB 060429: Refined IPN error box and Konus-Wind spectrum
  40. GRB 060502B: AROMA optical observations
  41. GRB 060502B: Refined analysis of the Swift-BAT short burst
  42. GRB 060427B Milagro GeV/TeV Observations
  43. GRB 060501: P60 Observations and Candidate Retraction
  44. GRB 060502B: MASTER optical observations
  45. GRB060502: Swift-XRT refined analysis
  46. GRB 060502: Swift-BAT refined analysis
  47. GRB 060502: APO Spectroscopic Observations
  48. GRB060502: Super-LOTIS Observations
  49. GRB 060501: MDM Observations
  50. GRB060501: Super-LOTIS observations
  51. GRB060501: P60 imaging and afterglow candidate
  52. GRB 060501: Refined analysis of the Swift-BAT burst
  53. IPN triangulation of GRB060429 (short/hard)
  54. Konus-Wind observation of GRB 060427B
  55. GRB060428B - SDSS Pre-Burst Observations
  56. GRB060428B: possible detection of an optical counterpart by Swift/UVOT.
  57. GRB 060428B: MDM Observations
  58. GRB 060427B: MASTER optical observations
  59. GRB060428B: Swift XRT Team refined analysis
  60. GRB 060427B: IPN localization of a short hard burst
  61. GRB 060428B: Refined analysis of the Swift-BAT burst
  62. GRB 060428B: KAIT observations
  63. GRB060425:MASTER optical limit
  64. GRB 051117A: Bright host galaxy not confirmed
  65. GRB060428B, optical observation
  66. GRB 060428A: Refined analysis of the Swift-BAT burst
  67. GRB060427:MASTER optical limit
  68. GRB060428A: Swift XRT Team refined analysis
  69. GRB 060427: NOT observations
  70. GRB 060427: Refined analysis of the Swift-BAT burst
  71. GRB060427: Swift XRT Team refined analysis
  72. GRB060418: Swift XRT Team Further Refined Analysis
  73. GRB060425:MASTER survey observations
  74. GRB 060425: IPN localization and KW spectrum of a short, hard burst
  75. An interactive program for GRB pseudo-redshift computations
  76. GRB060418: Further Analysis of MIKE Spectroscopy
  77. GRB 060424: Refined analysis of the Swift-BAT burst
  78. OT 060420: CONCAM detection of a candidate new magnitude 5 optical
  79. GRB 060421: Swift-BAT Refined Analysis
  80. GRB 060421: Swift-XRT refined analysis
  81. GRB 060418: prediction of t_break
  82. Konus-Wind observation of GRB 060418
  83. GRB(?)060421:MASTER optical limit
  84. GRB 060418: JHKs PAIRITEL Observations of Afterglow
  85. GRB 060418: Radio Observations
  86. GRB060418, BVRcIc field calibration
  87. GRB060418: Optical Observations
  88. GRB 060418: FRAM early afterglow observation
  89. GRB 060418: Refined Analysis of the Swift-BAT burst
  90. VLT/UVES observations of GRB060418
  91. GRB 060418, SMARTS continuing afterglow observations
  92. GRB 060418, SMARTS optical/IR afterglow observations
  93. GRB060418: Magellan/MIKE Spectroscopic Redshift
  94. GRB060418 : LT optical afterglow observation
  95. SGR 1900+14: Refined analysis of the Swift-BAT outburst
  96. GRB 060413: Refined analysis of the Swift-BAT burst
  97. GRB 060413: XRT refined analysis
  98. GRB 060413: Swift detection of a burst
  99. GRB060403: Optical Limit
  100. GRB060403: XRT refined analysis

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