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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"

36206 results found.

  1. GRB 080310 afterglow candidate (correction to UT time)
  2. GRB 080310: Swift detection of a burst with optical afterglow
  3. GRB 080310 afterglow candidate
  4. GRB 080307: Swift-XRT Team refined analysis
  5. GRB 080307: Swift/UVOT Upper Limits
  6. GRB 080307: Early RAPTOR Limits
  7. GRB 080307, Swift-BAT refined analysis
  8. GRB080307 - SDSS Pre-Burst Observations
  9. GRB 080307: TNT optical observation
  10. GRB080307: Optical upper limits
  11. GRB 080307: Gemini-N i-band observations - candidate afterglow
  12. GRB 080307: BOAO imaging - retraction and new limit
  13. GRB 080307: retraction of UVOT candidate
  14. GRB 080307: Enhanced Swift-XRT position
  15. GRB 080307, Preliminary Swift-BAT refined analysis
  16. GRB 080307 : BOAO optical afterglow observation
  17. GRB 080307: Optical observation with DMC/KANATA
  18. GRB 080307: Swift detection of a burst
  19. VLA possible radio detection of GRB 080229
  20. GRB 080303: Swift/UVOT follow-up of afterglow detection
  21. GRB 080303, Swift-BAT refined analysis
  22. GRB 080303: Rapid PROMPT Detections
  23. GRB080303: Swift XRT refined analysis
  24. GRB 080303: Enhanced Swift-XRT position
  25. GRB080229B: Swift XRT afterglow observation
  26. GRB 080303A: Faulkes Telescope South optical afterglow observations
  27. GRB 080303
  28. GRB 080303: Swift detection of a burst with optical afterglow
  29. GRB 080303: REM NIR afterglow candidate
  30. GRB 080303A: ROTSE-III Optical Limits
  31. GRB 080229: I-band observations from OSN
  32. GRB 080229: VLT NIR observations
  33. GRB080229: Swift XRT refined analysis
  34. GRB 080229: TNG NIR observations
  35. GRB 080229: Deep Gemini/GMOS optical observations
  36. GRB 080229: Enhanced Swift-XRT position
  37. GRB 080229: REM NIR observations
  38. GRB080229: Possible optical afterglow
  39. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  40. UVOT analysis for GRB080229
  41. GRB 080229, Swift-BAT refined analysis
  42. GRB 080229: Faulkes Telescope South optical limit
  43. GRB 080229A: ROTSE-III Optical Limits
  44. GRB 080229: Swift detection of a bright burst
  45. Early optical shallow decay in GRB 071112C
  46. GRB080207: optical observations
  47. GRB080205: optical observations
  48. GRB080211: optical observations
  49. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  50. GRB 071010B : Early optical brightening detected by TAOS
  51. Swift-XRT improved positions, and new redshift limits.
  52. ESO optical and NIR observations of GRB 080218B
  53. GRB 080204: Suzaku WAM observation of the prompt emission
  54. GRB 080218B, Swift-BAT refined analysis
  55. GRB 080218B: Swift-XRT refined analysis
  56. GRB 080218B: REM NIR early upper limits
  57. GRB 080212: Mount Abu NIR observations
  58. GRB 080218B: Enhanced Swift-XRT position
  59. GRB 080218B: GROND upper limits
  60. GRB 080218b, SMARTS optical/IR limits
  61. GRB 080218A, Swift-BAT refined analysis
  62. GRB080218B: Watcher prompt limit
  63. GRB 080211: Suzaku WAM observation of the prompt emission
  64. GRB 080218B: Swift detection of a burst
  65. GRB 080218: Swift detection of a burst
  66. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  67. GRB 080212: VLT optical rapid decay
  68. GRB 080212: REM refined analysis
  69. Konus-Wind observation of GRB 080211
  70. VLA radio upper limit on GRB 080212
  71. Swift/UVOT refined analysis of GRB080212
  72. GRB 080212, Swift-BAT refined analysis
  73. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  74. GRB 080212: Gemini-South optical observations
  75. GRB 080212: GROND detects afterglow
  76. GRB 080212: REM NIR afterglow?
  77. GRB 080212: optical observations
  78. GRB 080212: Enhanced Swift-XRT position
  79. GRB 080212: Swift-XRT Team refined analysis
  80. GRB 080210: Keck photometry
  81. VLA non-detection of GRB 080210
  82. GRB 080212: Swift detection of a burst
  83. IPN localization of GRB 080211
  84. GRB 080212: DSS/2MASS Galaxy at XRT position
  85. GRB 080207: VLT NIR early upper limits
  86. GRB 080210: Swift/UVOT Refined Analysis
  87. GRB 080207: optical observations.
  88. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  89. GRB 080210, Swift-BAT refined analysis
  90. GRB 080210: Super-LOTIS observations
  91. GRB 080210: Swift-XRT Refined Analysis
  92. GRB 080210: VLT redshift
  93. GRB 080210: Enhanced Swift-XRT position
  94. GRB 080210: Rapid PROMPT Detections
  95. GRB 080210: GOND detection in all bands and redshift upper limit
  96. GRB080210 - SDSS Pre-Burst Observations
  97. GRB 080210: Swift detection of a burst with optical afterglow
  98. GRB 080210: TAROT La Silla observatory optical detection
  99. GRB 080207: GROND upper limits
  100. GRB 080205: GAO 150cm telescope Optical limit

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