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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"

21925 results found.

  1. GRB 080315: Optical observations
  2. GRB 080315: TAROT Calern observatory optical observations
  3. GRB 080315: Swift detection of a possible burst
  4. GRB 080310: GAO 150cm telescope Optical Observation
  5. GRB 080307: GAO 150cm telescope Optical Observation
  6. GRB 080229A: GAO 150cm telescope Optical Observation
  7. GRB 080310, Swift-BAT refined analysis
  8. GRB 080310: Swift/UVOT Refined Analysis
  9. GRB 080310 - SDSS Pre-Burst Observations
  10. GRB 080310: Enhanced Swift-XRT position
  11. GRB 080310: RRM optical photometry with the VLT
  12. GRB 080310: REM observations
  13. GRB 080310: Swift detection of a burst with optical afterglow
  14. GRB080307, optical upper limit
  15. GRB080229, optical upper limit
  16. GRB 080307: Swift/UVOT Upper Limits
  17. GRB 080307: Early RAPTOR Limits
  18. GRB080307 - SDSS Pre-Burst Observations
  19. GRB 080307: TNT optical observation
  20. GRB080307: Optical upper limits
  21. GRB 080307: Gemini-N i-band observations - candidate afterglow
  22. GRB 080307: Enhanced Swift-XRT position
  23. GRB 080307: Optical observation with DMC/KANATA
  24. GRB 080307: Swift detection of a burst
  25. VLA possible radio detection of GRB 080229
  26. GRB 080303: Rapid PROMPT Detections
  27. GRB 080303: Enhanced Swift-XRT position
  28. Swift UVOT observations of GRB080229B
  29. GRB 080303: Swift detection of a burst with optical afterglow
  30. GRB 080303: REM NIR afterglow candidate
  31. GRB 080303A: ROTSE-III Optical Limits
  32. GRB 080229: I-band observations from OSN
  33. GRB 080229: VLT NIR observations
  34. GRB 080229: TNG NIR observations
  35. GRB 080229: Enhanced Swift-XRT position
  36. GRB 080229: REM NIR observations
  37. GRB080229: Possible optical afterglow
  38. UVOT analysis for GRB080229
  39. GRB 080229A: ROTSE-III Optical Limits
  40. GRB 080229: Swift detection of a bright burst
  41. XRF 080109/SN2008D : GMRT upper limit at 1.28 GHz
  42. Swift-XRT improved positions, and new redshift limits.
  43. GRB 080204: Suzaku WAM observation of the prompt emission
  44. Swift/UVOT observations of GRB080218B
  45. GRB 080218B: REM NIR early upper limits
  46. GRB 080218B: Enhanced Swift-XRT position
  47. GRB 080218B: GROND upper limits
  48. GRB 080211: Suzaku WAM observation of the prompt emission
  49. Swift-XRT and UVOT observations of the IPN burst GRB 080211
  50. GRB 080212: VLT optical rapid decay
  51. Konus-Wind observation of GRB 080211
  52. VLA radio upper limit on GRB 080212
  53. Swift/UVOT refined analysis of GRB080212
  54. GRB 080212, Swift-BAT refined analysis
  55. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  56. GRB 080212: GROND detects afterglow
  57. GRB 080212: REM NIR afterglow?
  58. GRB 080212: Enhanced Swift-XRT position
  59. GRB 080210: Keck photometry
  60. VLA non-detection of GRB 080210
  61. GRB 080212: Swift detection of a burst
  62. IPN localization of GRB 080211
  63. GRB 080207: VLT NIR early upper limits
  64. GRB 080210: Swift/UVOT Refined Analysis
  65. GRB 080210, Swift-BAT refined analysis
  66. GRB 080210: Super-LOTIS observations
  67. GRB 080210: Enhanced Swift-XRT position
  68. GRB 080210: GOND detection in all bands and redshift upper limit
  69. GRB080210 - SDSS Pre-Burst Observations
  70. GRB 080210: Swift detection of a burst with optical afterglow
  71. GRB 080210: TAROT La Silla observatory optical detection
  72. GRB 080207: GROND upper limits
  73. GRB 080205: GAO 150cm telescope Optical limit
  74. GRB 080207: Optical limits from Gemini-South
  75. Swift detection of AX J1749.1-2639
  76. GRB 080207: Super-LOTIS observations
  77. GRB080207: RTT150 Optical Observations
  78. GRB 080207: REM NIR observations
  79. GRB080207: Swift/UVOT refined analysis
  80. GRB 080207: TAROT Calern observatory optical observations
  81. GRB 080207: Enhanced Swift-XRT position
  82. GRB 080207: Swift detection of a burst
  83. Konus-Wind observation of GRB 080204
  84. GRB 080205: optical observation
  85. VLA radio upper limit on GRB 080205
  86. INT+WFC R-band observations of GRB 080205
  87. IPN localization of very hard GRB 080204
  88. GRB 080205: OA evolution from KAIT observations
  89. GRB 080205: Swift/UVOT observations
  90. GRB 080205: Enhanced Swift-XRT position
  91. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  92. GRB 080130: Swift-BAT refined analysis
  93. GRB 080130: further Swift XRT observations confirm fading source
  94. GRB 080129: Swift/UVOT Refined Upper Limits
  95. Swift/UVOT observations of GRB080130
  96. GRB 080130: REM NIR observations
  97. GRB 080130(?): Swift XRT observation
  98. GRB 080129: Swift-XRT refined analysis
  99. GRB 080129: KAIT optical limits
  100. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)

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