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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"

36385 results found.

  1. GRB060712: MASTER optical observation
  2. GRB120706: MASTER optical observation
  3. GRB 060712: Swift detection of a burst
  4. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  5. GRB 060708: PROMPT Optical Limits
  6. GRB 060707: OA fading and redshift
  7. GRB 060708: Swift-XRT refined analysis
  8. GCN 060708: Swift-UVOT Observations
  9. GRB 060708: Refined analysis of the Swift-BAT burst
  10. GCN 060707: Swift-UVOT observations
  11. GRB 060707: Swift-XRT refined analysis
  12. GRB 060708: Swift detection of a burst with an UVOT countpart
  13. GRB060707 possible optical confirmation
  14. GRB 060707: BOOTES-IR optical afterglow candidate
  15. GRB 060707: Refined analysis of the Swift-BAT burst
  16. GRB 060707: BOOTES-IR optical observation
  17. GRB 060707: Swift detection of a burst
  18. GRB 060515: Upper Limit on Host Galaxy
  19. GRB 050223: Magellan redshift
  20. GRB 060614: SMARTS host galaxy observations
  21. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  22. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  23. GRB 060109: Upper Limit on Host Galaxy
  24. GRB 060105: Upper limit on Host Galaxy
  25. GRB060614: Detection of the host galaxy but no supernova emission
  26. GRB 060614: redshift confirmation
  27. GRB 060614: Redshift
  28. Swift-BAT trigger 215279 is not a GRB
  29. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  30. GRB060614: Optical observations
  31. GRB 060614: spectroscopy
  32. GRB050326: Host Galaxy Candidates
  33. GRB050124: Possible Host Galaxy
  34. GRB050223: Host Galaxy
  35. GRB060512: near IR observations
  36. GRB060526: optical observations
  37. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  38. Konus-Wind observation of GRB 060614
  39. GRB060605: optical observation
  40. The Unusually Long-Lived Afterglow of GRB 060614
  41. GRB 060614: optical observations
  42. GRB 060605, optical observations
  43. GRB 060614, SMARTS optical/IR afterglow observation
  44. GRB060614: SSO 1m observations
  45. GRB060614: Watcher observation
  46. GRB 060614: Swift-BAT refined analysis
  47. GRB 060614: Swift/UVOT Observations
  48. GRB 060604, optical observations
  49. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  50. GRB 060602A: Swift/XRT analysis
  51. GRB 060610: KAIT observations
  52. GRB 060607: RTT150 optical observations
  53. GRB 070706B: Watcher upper limit
  54. GRB 060607B: Swift-BAT Refined Analysis
  55. GRB 060607B: Swift detection of a burst
  56. GCN 060607: Swift-UVOT obswervations.
  57. GRB 060607: Swift-BAT Refined Analysis
  58. GRB 060607: optical limit by "Pi of the Sky"
  59. GRB 060607: Swift-XRT Team refined analysis
  60. GRB 060607: IR observations
  61. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  62. VLT/UVES observations of GRB 060607
  63. GRB 060607: PROMPT Observations
  64. GRB 060605: RTT150 optical observations
  65. GRB 060607: REM NIR afterglow
  66. GRB 060607: Swift detection of a burst with bright optical counterpart
  67. GRB 060522: PROMPT Optical Limits
  68. GRB 060605 BAT refined analysis
  69. GRB 060605: Xinglong TNT optical observations
  70. GRB060602B : REM infrared observations
  71. GRB060605: Swift/UVOT detections
  72. GRB 060605: Swift-XRT Team refined analysis
  73. SALT spectroscopy of GRB 060605
  74. GRB 060605: TNG optical observations
  75. GRB 060605: RTT150 optical observations
  76. GRB 060605: ROTSE-III Optical Counterpart
  77. GRB 060605: Swift detection of a burst with optical counterpart
  78. GRB 060605: ROTSE-III Detection of Optical Counterpart
  79. GRB 060604: redshift
  80. GRB 060512: Keck Redshift
  81. GRB 060604 optical photometry
  82. GRB 060604: Swift-XRT Team refined analysis
  83. GRB 060604: BAT refined analysis
  84. GRB 060604A: ROTSE-III Optical Limits
  85. GRB 060604: Swift detection of a burst with possible optical counterpart
  86. GRB 060602A: Swift-BAT Refined Analysis: Correction
  87. GRB 060602B: XMM-Newton Survey Source
  88. GRB 060602B: Swift-XRT Refined Analysis
  89. GRB 060602B: Swift-BAT Refined Analysis
  90. GRB 060602B: Swift/UVOT observations
  91. GRB 060602A: Swift-BAT Refined Analysis
  92. GRB 060602B: RTT150 optical observations
  93. GRB 060211A : WIDGET simultaneous optical observations
  94. GRB060602A: optical observations(/transient?)
  95. GRB 060526: Tautenburg Second Epoch Observations
  96. GRB060602A: Bootes-IR observations
  97. GRB 060602B: Swift detection of a burst
  98. GRB060602B: Watcher observations - no OT candidate
  99. GRB060602B: BOOTES-IR candidate afterglow
  100. GRB060602 - SDSS Pre-Burst Observations

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