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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"

42873 results found.

  1. GRB 060717: NOT observations
  2. GRB 060714: Refined analysis of the Swift-BAT burst
  3. GRB060717: Swift/UVOT upper limits
  4. GRB 060717: Swift XRT refined position
  5. GRB 060717: Swift-BAT refined analysis
  6. GRB060717 - SDSS Pre-burst Observations
  7. GRB 060714: REM infrared observations
  8. GRB 060717: Swift detection of a burst
  9. GRB 060714, SMARTS optical/IR afterglow observation
  10. GRB 060714 : Liverpool Telescope Observations
  11. GRB 060714: Swift XRT refined analysis
  12. GRB 060714: OA redshift
  13. GRB 060708: VLT spectroscopy
  14. GRB060708: MARGE low resolution spectrum observations
  15. GRB060714: optical observations
  16. GRB060707 possible optical confirmation
  17. Swift trigger 219136 is probably not a GRB
  18. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  19. GRB 060605: SkyNet Optical Limits
  20. GRB060712: P60 Observations
  21. GRB060526: optical observations
  22. GRB 060712: XRT refined position
  23. GRB 060712: Refined analysis of the Swift-BAT burst
  24. GRB060712: MASTER optical observation
  25. GRB120706: MASTER optical observation
  26. GRB 060712: Swift detection of a burst
  27. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  28. GRB 060708: PROMPT Optical Limits
  29. GRB 060707: OA fading and redshift
  30. GRB 060708: Swift-XRT refined analysis
  31. GCN 060708: Swift-UVOT Observations
  32. GRB 060708: Refined analysis of the Swift-BAT burst
  33. GCN 060707: Swift-UVOT observations
  34. GRB 060707: Swift-XRT refined analysis
  35. GRB 060708: Swift detection of a burst with an UVOT countpart
  36. GRB060707 possible optical confirmation
  37. GRB 060707: BOOTES-IR optical afterglow candidate
  38. GRB 060707: Refined analysis of the Swift-BAT burst
  39. GRB 060707: BOOTES-IR optical observation
  40. GRB060614: Possible SN Bump in UVOT U Band Light Curve
  41. GRB 060707: Swift detection of a burst
  42. GRB 060515: Upper Limit on Host Galaxy
  43. GRB 050223: Magellan redshift
  44. GRB 060614: SMARTS host galaxy observations
  45. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  46. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  47. GRB 060109: Upper Limit on Host Galaxy
  48. GRB 060105: Upper limit on Host Galaxy
  49. GRB060614: Detection of the host galaxy but no supernova emission
  50. GRB 060614: Redshift
  51. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  52. GRB060614: Optical observations
  53. GRB 060614: spectroscopy
  54. GRB050326: Host Galaxy Candidates
  55. GRB050124: Possible Host Galaxy
  56. GRB050223: Host Galaxy
  57. GRB060512: near IR observations
  58. GRB060526: optical observations
  59. Konus-Wind observation of GRB 060614
  60. GRB060605: optical observation
  61. The Unusually Long-Lived Afterglow of GRB 060614
  62. GRB 060614: optical observations
  63. GRB 060605, optical observations
  64. GRB 060614, SMARTS optical/IR afterglow observation
  65. GRB060614: SSO 1m observations
  66. GRB060614: Watcher observation
  67. GRB 060614: Swift-BAT refined analysis
  68. GRB 060614: Swift/UVOT Observations
  69. GRB060614: Swift-XRT refined analysis
  70. GRB 060604, optical observations
  71. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  72. GRB 060602A: Swift/XRT analysis
  73. BAT Trigger #214277 is SGR 1900+14
  74. GRB 060610: KAIT observations
  75. GRB 070706B: Watcher upper limit
  76. GRB 060607B: Swift-BAT Refined Analysis
  77. GRB060602A: Swift/UVOT upper limits
  78. GRB 060607B: Swift detection of a burst
  79. GCN 060607: Swift-UVOT obswervations.
  80. GRB 060607: Swift-BAT Refined Analysis
  81. GRB 060607: optical limit by "Pi of the Sky"
  82. GRB 060607: IR observations
  83. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  84. VLT/UVES observations of GRB 060607
  85. GRB 060607: PROMPT Observations
  86. GRB 060607: REM NIR afterglow
  87. GRB 060607: Swift detection of a burst with bright optical counterpart
  88. GRB 060522: PROMPT Optical Limits
  89. GRB 060605: Xinglong TNT optical observations
  90. GRB060602B : REM infrared observations
  91. GRB060605: Swift/UVOT detections
  92. GRB 060605: Swift-XRT Team refined analysis
  93. SALT spectroscopy of GRB 060605
  94. GRB 060605: RTT150 optical observations
  95. GRB060605: Spectral Observations and Redshift
  96. GRB 060605: ROTSE-III Optical Counterpart
  97. GRB 060605: Swift detection of a burst with optical counterpart
  98. GRB060604: Swift/UVOT detections
  99. GRB 060604: redshift
  100. GRB 060512: Keck Redshift

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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