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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"

37680 results found.

  1. GRB 080307: Swift/UVOT Upper Limits
  2. GRB 080307: Early RAPTOR Limits
  3. GRB 080307, Swift-BAT refined analysis
  4. GRB080307 - SDSS Pre-Burst Observations
  5. GRB 080307: TNT optical observation
  6. GRB080307: Optical upper limits
  7. GRB 080307: Gemini-N i-band observations - candidate afterglow
  8. GRB 080307: BOAO imaging - retraction and new limit
  9. GRB 080307: retraction of UVOT candidate
  10. GRB 080307: Enhanced Swift-XRT position
  11. GRB 080307, Preliminary Swift-BAT refined analysis
  12. GRB 080307 : BOAO optical afterglow observation
  13. GRB 080307: Optical observation with DMC/KANATA
  14. GRB 080307: Swift detection of a burst
  15. VLA possible radio detection of GRB 080229
  16. GRB 080303: Swift/UVOT follow-up of afterglow detection
  17. GRB 080303, Swift-BAT refined analysis
  18. GRB 080303: Rapid PROMPT Detections
  19. GRB080303: Swift XRT refined analysis
  20. GRB 080303: Enhanced Swift-XRT position
  21. GRB080229B: Swift XRT afterglow observation
  22. GRB 080303A: Faulkes Telescope South optical afterglow observations
  23. GRB 080303
  24. GRB 080303: Swift detection of a burst with optical afterglow
  25. GRB 080303: REM NIR afterglow candidate
  26. GRB 080303A: ROTSE-III Optical Limits
  27. GRB 080229: I-band observations from OSN
  28. GRB 080229: VLT NIR observations
  29. GRB080229: Swift XRT refined analysis
  30. GRB 080229: TNG NIR observations
  31. GRB 080229: Deep Gemini/GMOS optical observations
  32. GRB 080229: Enhanced Swift-XRT position
  33. GRB 080229: REM NIR observations
  34. GRB080229: Possible optical afterglow
  35. GRB 080229B: Gamma Ray Burst Localization by SuperAGILE
  36. UVOT analysis for GRB080229
  37. GRB 080229, Swift-BAT refined analysis
  38. GRB 080229: Faulkes Telescope South optical limit
  39. GRB 080229A: ROTSE-III Optical Limits
  40. GRB 080229: Swift detection of a bright burst
  41. Early optical shallow decay in GRB 071112C
  42. GRB080207: optical observations
  43. GRB080205: optical observations
  44. GRB080211: optical observations
  45. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  46. GRB 071010B : Early optical brightening detected by TAOS
  47. Swift-XRT improved positions, and new redshift limits.
  48. ESO optical and NIR observations of GRB 080218B
  49. GRB 080204: Suzaku WAM observation of the prompt emission
  50. GRB 080218B, Swift-BAT refined analysis
  51. GRB 080218B: Swift-XRT refined analysis
  52. GRB 080218B: REM NIR early upper limits
  53. GRB 080212: Mount Abu NIR observations
  54. GRB 080218B: Enhanced Swift-XRT position
  55. GRB 080218B: GROND upper limits
  56. GRB 080218b, SMARTS optical/IR limits
  57. GRB 080218A, Swift-BAT refined analysis
  58. GRB080218B: Watcher prompt limit
  59. GRB 080211: Suzaku WAM observation of the prompt emission
  60. GRB 080218B: Swift detection of a burst
  61. GRB 080218: Swift detection of a burst
  62. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  63. GRB 080212: VLT optical rapid decay
  64. GRB 080212: REM refined analysis
  65. Konus-Wind observation of GRB 080211
  66. VLA radio upper limit on GRB 080212
  67. Swift/UVOT refined analysis of GRB080212
  68. GRB 080212, Swift-BAT refined analysis
  69. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  70. GRB 080212: Gemini-South optical observations
  71. GRB 080212: GROND detects afterglow
  72. GRB 080212: REM NIR afterglow?
  73. GRB 080212: optical observations
  74. GRB 080212: Enhanced Swift-XRT position
  75. GRB 080212: Swift-XRT Team refined analysis
  76. GRB 080210: Keck photometry
  77. VLA non-detection of GRB 080210
  78. GRB 080212: Swift detection of a burst
  79. IPN localization of GRB 080211
  80. GRB 080212: DSS/2MASS Galaxy at XRT position
  81. GRB 080207: VLT NIR early upper limits
  82. GRB 080210: Swift/UVOT Refined Analysis
  83. GRB 080207: optical observations.
  84. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  85. GRB 080210, Swift-BAT refined analysis
  86. GRB 080210: Super-LOTIS observations
  87. GRB 080210: Swift-XRT Refined Analysis
  88. GRB 080210: VLT redshift
  89. GRB 080210: Enhanced Swift-XRT position
  90. GRB 080210: Rapid PROMPT Detections
  91. GRB 080210: GOND detection in all bands and redshift upper limit
  92. GRB080210 - SDSS Pre-Burst Observations
  93. GRB 080210: Swift detection of a burst with optical afterglow
  94. GRB 080210: TAROT La Silla observatory optical detection
  95. GRB 080207: GROND upper limits
  96. GRB 080205: GAO 150cm telescope Optical limit
  97. GRB 080207, Swift-BAT refined analysis
  98. GRB 080207: Optical limits from Gemini-South
  99. GRB 080205: RTT150 optical observations
  100. GRB 080207: Super-LOTIS observations

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