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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"

32579 results found.

  1. GRB 101219A: Gemini-North host redshift
  2. GRB 110102A: Swift-XRT refined Analysis
  3. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  4. Konus-Wind observation of GRB 110102A
  5. GRB110102A: Swift/UVOT observations
  6. GRB110102A: MITSuME Okayama Optical Observation
  7. GRB 110102A: Fermi GBM observation
  8. GRB 110102A: Swift-BAT refined analysis
  9. GRB 101225A: optical break from NOT observation
  10. GRB 101225A: MMT spectroscopy
  11. GRB 101225A: P60 Observations
  12. GRB 101225A: MAXI/GSC observations
  13. GRB 101225A Late-time emission observed by Swift-BAT
  14. GRB 101225: Optical follow-up of the Christmas burst
  15. GRB 101225A: WHT observations
  16. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  17. GRB 101225A, Swift-BAT refined analysis
  18. GRB 101225A: Swift/UVOT Detection
  19. GRB 101225A: Swift-XRT refined Analysis
  20. Trigger 441015 / GRB 101225A: Further NOT optical observation
  21. Trigger 441015 / GRB 101225A: NOT optical afterglow candidate
  22. GRB 101225A (Swift trigger 441015): optical upper limit
  23. GRB 101224A: NOT optical observation
  24. GRB 101224A: Pre-event imaging from DeepSky; Detection of a source in the XRT error circle
  25. GRB 101224A: Swift/UVOT Upper Limits
  26. GRB 101224A: Fermi GBM observation
  27. GRB 101224A: Swift-XRT refined Analysis
  28. GRB101224A: MITSuME Okayama optical upper limits
  29. GRB 101224A, Swift-BAT refined analysis
  30. GRB 101224A - UVOT-enhanced XRT position
  31. GRB 101219A: Chandra Observations
  32. GRB 101219B: Swift/UVOT refined analysis
  33. GRB 101219B: Swift-XRT refined Analysis
  34. GRB 101219A: MITSuME Ishigakijima Optical upper limits
  35. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  36. GRB 101219B: Fermi GBM observation
  37. GRB 101219A: IAC80 optical observations
  38. GRB 101219B: Swift-BAT refined analysis
  39. GRB 101219A: Swift-XRT refined Analysis
  40. GRB 101219A: Swift/UVOT Upper Limits
  41. GRB 101219A: GROND Upper limits
  42. Konus-Wind observation of short hard GRB 101219A
  43. GRB 101219A: Magellan NIR observations
  44. GRB 101219A: Further Gemini-South Imaging
  45. GRB 101219A: Swift-BAT refined analysis
  46. GRB 101219A - NOT observation - upper limit
  47. GRB 101219A: SARA-N Upper Limit
  48. GRB 101219A: Gemini-South observations
  49. GRB 101219A: REM optical and NIR observations
  50. GRB 101219A: ROTSE-III Optical Limits
  51. Request for Supernova related data for GRB 101023A
  52. GRB 101213A : Suzaku WAM observation of the prompt emission
  53. Redshift solution(s) for GRB101213A from Swift-XRT data
  54. Konus-Wind observation of GRB 101213A
  55. XRF 101117A, RIMOTS optical upper limits
  56. GRB 101213A: Fermi GBM observation
  57. GRB 101213A, Swift-BAT refined analysis
  58. GRB 101213A: Swift-XRT refined Analysis
  59. GRB 101213A: Swift/UVOT Upper Limits
  60. GRB 101213: object within the X-ray error circle
  61. GRB101204A: Swift/UVOT observations
  62. GRB 101204A: Swift-XRT refined Analysis
  63. GRB101204A GROND Detection of the Optical/NIR Afterglow
  64. GRB 101204A Afterglow Candidate, VATT Observations
  65. GRB 101204A Swift-XRT/UVOT afterglow candidate
  66. Konus-Wind observation of GRB 101130A
  67. Konus-Wind observation of GRB 101129A
  68. IPN Localization of GRB101130 (possible short duration burst)
  69. GRB101030A
  70. GRB 101201A: Fermi GBM observation
  71. GRB 101201A: Swift-XRT refined Analysis
  72. GRB 101201A: Swift/UVOT Detection
  73. GRB 101201A: GROND Detection of the Optical/NIR Afterglow
  74. Swift detection of MAXIJ1409-619
  75. GRB 101123A: ROTSE optical observations
  76. GRB 101123A: MASTER prompt optical observations
  77. Konus-Wind observation of GRB 101123A
  78. IPN triangulation of bright GRB 101123A
  79. Optical observation of GRB 101024A
  80. GRB 101117B: GROND Upper limits
  81. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  82. XRF 101117A: Palomar Transient Factory Observations
  83. GRB 101117B: Swift-XRT refined analysis
  84. GRB101114A: Swift/UVOT Upper Limits
  85. GRB 101114A: Confirmation of the X-ray afterglow
  86. GRB 101117B: Swift-BAT refined analysis
  87. GRB 101114A: GROND Upper limits
  88. Konus-Wind observation of GRB 101114A
  89. GRB 101114A: Swift-XRT candidate afterglow detection and analysis
  90. Possible detection of INTEGRAL burst GRB 101112A by the EVLA
  91. GRB 101112A: Fermi GBM detection
  92. GRB 101112A: optical observations
  93. GRB 10112A: MASTER optical observations
  94. Konus-Wind observation of GRB 101112A
  95. GRB 101112A - XRT source detection/analysis
  96. GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
  97. GRB101112A: Liverpool Telescope Afterglow Candidate
  98. GRB 100906A: optical observations
  99. GRB 090113, the review of the sky area in plate archives
  100. GRB 101030A : MOA optical observation

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