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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"

36215 results found.

  1. GRB 060717 optical upper limit
  2. GRB060717: Swift/UVOT upper limits
  3. GRB 060717: Swift XRT refined position
  4. GRB 060717: Swift-BAT refined analysis
  5. GRB060717 - SDSS Pre-burst Observations
  6. GRB 060714: REM infrared observations
  7. GRB 060717, optical observation
  8. GRB 060717: Swift detection of a burst
  9. GRB060714: correction to GCN 5324
  10. GRB060714: optical observations
  11. GRB 060714, SMARTS optical/IR afterglow observation
  12. GRB 060714 : Liverpool Telescope Observations
  13. GRB 060714: Swift XRT refined analysis
  14. GRB 060714: OA redshift
  15. GRB 060708: VLT spectroscopy
  16. GRB060708: MARGE low resolution spectrum observations
  17. GRB060714: optical observations
  18. Swift-BAT trigger 219136 is not a GRB
  19. Correction to Circular 5314: Circular refers to GRB 060714
  20. GRB060707 possible optical confirmation
  21. Swift trigger 219136 is probably not a GRB
  22. GRB 060714, optical observation
  23. GRB 060714: Swift detection of a burst with an UVOT optical afterglow
  24. GRB 060605: SkyNet Optical Limits
  25. GRB060712: P60 Observations
  26. GRB 060712: XRT refined analysis
  27. GRB 060712: Swift/UVOT Upper Limits
  28. GRB060526: optical observations
  29. GRB 060712: XRT refined position
  30. GRB 060712: Refined analysis of the Swift-BAT burst
  31. GRB060712: MASTER optical observation
  32. GRB120706: MASTER optical observation
  33. GRB 060712: Swift detection of a burst
  34. Host galaxy of GRB050904: 250 GHz upper limit with MAMBO at the IRAM 30m
  35. GRB 060708: PROMPT Optical Limits
  36. GRB 060707: OA fading and redshift
  37. GRB 060708: Swift-XRT refined analysis
  38. GCN 060708: Swift-UVOT Observations
  39. GRB 060708: Refined analysis of the Swift-BAT burst
  40. GCN 060707: Swift-UVOT observations
  41. GRB 060707: Swift-XRT refined analysis
  42. GRB 060708: Swift detection of a burst with an UVOT countpart
  43. GRB060707 possible optical confirmation
  44. GRB 060707: BOOTES-IR optical afterglow candidate
  45. GRB 060707: Refined analysis of the Swift-BAT burst
  46. GRB 060707: BOOTES-IR optical observation
  47. GRB 060707: Swift detection of a burst
  48. GRB 060515: Upper Limit on Host Galaxy
  49. GRB 050223: Magellan redshift
  50. GRB 060614: SMARTS host galaxy observations
  51. GRB 060614: Detection of a Possible, Late-Time Rebrightening
  52. Correction to GCN 5278 & GCN 5279 (GRBs 060105 & 060109)
  53. GRB 060109: Upper Limit on Host Galaxy
  54. GRB 060105: Upper limit on Host Galaxy
  55. GRB060614: Detection of the host galaxy but no supernova emission
  56. GRB 060614: redshift confirmation
  57. GRB 060614: Redshift
  58. Swift-BAT trigger 215279 is not a GRB
  59. Trigger 215279: Swift detection of a possible burst (GRB 060619)
  60. GRB060614: Optical observations
  61. GRB 060614: spectroscopy
  62. GRB050326: Host Galaxy Candidates
  63. GRB050124: Possible Host Galaxy
  64. GRB050223: Host Galaxy
  65. GRB060512: near IR observations
  66. GRB060526: optical observations
  67. GRB 060614: pseudo-z from spectral parameters of the prompt emission
  68. Konus-Wind observation of GRB 060614
  69. GRB060605: optical observation
  70. The Unusually Long-Lived Afterglow of GRB 060614
  71. GRB 060614: optical observations
  72. GRB 060605, optical observations
  73. GRB 060614, SMARTS optical/IR afterglow observation
  74. GRB060614: SSO 1m observations
  75. GRB060614: Watcher observation
  76. GRB 060614: Swift-BAT refined analysis
  77. GRB 060614: Swift/UVOT Observations
  78. GRB 060604, optical observations
  79. GRB 060614: Swift detection of a burst with a bright optical and X-ray counterpart
  80. GRB 060602A: Swift/XRT analysis
  81. GRB 060610: KAIT observations
  82. GRB 060607: RTT150 optical observations
  83. GRB 070706B: Watcher upper limit
  84. GRB 060607B: Swift-BAT Refined Analysis
  85. GRB 060607B: Swift detection of a burst
  86. GCN 060607: Swift-UVOT obswervations.
  87. GRB 060607: Swift-BAT Refined Analysis
  88. GRB 060607: optical limit by "Pi of the Sky"
  89. GRB 060607: Swift-XRT Team refined analysis
  90. GRB 060607: IR observations
  91. GRB 060502B: A Bright Early-type Galaxy as Putative Host of the Short Burst
  92. VLT/UVES observations of GRB 060607
  93. GRB 060607: PROMPT Observations
  94. GRB 060605: RTT150 optical observations
  95. GRB 060607: REM NIR afterglow
  96. GRB 060607: Swift detection of a burst with bright optical counterpart
  97. GRB 060522: PROMPT Optical Limits
  98. GRB 060605 BAT refined analysis
  99. GRB 060605: Xinglong TNT optical observations
  100. GRB060602B : REM infrared observations

Advanced

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