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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"

15386 results found.

  1. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  2. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  3. Short GRB 110106A: MASTER OT observations
  4. GRB 110106B: Gemini-North / WHT detection of a fading afterglow
  5. GRB 110106A: TNG redshift of the closeby galaxy
  6. GRB 101225A: Keck redshift
  7. GRB 101219B: After 2 weeks still detected by Swift/UVOT
  8. Konus-Wind observation of GRB 110102A
  9. GRB 110102A: Fermi GBM observation
  10. GRB 101225A: P60 Observations
  11. GRB 101225A: MAXI/GSC observations
  12. GRB 101225A Late-time emission observed by Swift-BAT
  13. GRB 101225: Optical follow-up of the Christmas burst
  14. Tentative redshift of GRB101225A (Christmas's burst) from Swift-XRT data
  15. GRB 101224A: NOT optical observation
  16. GRB 101224A: Fermi GBM observation
  17. GRB 101219B: GROND Detection of the Optical/NIR Afterglow
  18. GRB 101219A: GROND Upper limits
  19. Konus-Wind observation of short hard GRB 101219A
  20. GRB 101219A: SARA-N Upper Limit
  21. Request for Supernova related data for GRB 101023A
  22. GRB 101213A : Suzaku WAM observation of the prompt emission
  23. Redshift solution(s) for GRB101213A from Swift-XRT data
  24. Konus-Wind observation of GRB 101213A
  25. XRF 101117A, RIMOTS optical upper limits
  26. GRB 101213A: Fermi GBM observation
  27. GRB101204A GROND Detection of the Optical/NIR Afterglow
  28. GRB 101129A : Suzaku WAM observation of the prompt emission
  29. Konus-Wind observation of GRB 101130A
  30. GRB 101204A detected in ground analysis of BAT data
  31. Konus-Wind observation of GRB 101129A
  32. IPN Localization of GRB101130 (possible short duration burst)
  33. GRB 101201A: Fermi GBM observation
  34. GRB 101201A: Swift/UVOT Detection
  35. GRB 101123A: ROTSE optical observations
  36. Konus-Wind observation of GRB 101123A
  37. Optical observation of GRB 101024A
  38. GRB 101117B: GROND Upper limits
  39. GRB 101117B: Swift/UVOT Observations of the Optical Afterglow
  40. XRF 101117A: Palomar Transient Factory Observations
  41. GRB101114A: Swift/UVOT Upper Limits
  42. GRB 101114A: Confirmation of the X-ray afterglow
  43. GRB 101114A: GROND Upper limits
  44. Konus-Wind observation of GRB 101114A
  45. GRB 10112A: MASTER optical observations
  46. Konus-Wind observation of GRB 101112A
  47. GRB 101030A: GROND optical/NIR afterglow candidate
  48. GRB 101030A: Swift/UVOT Upper Limits
  49. Konus-Wind observation of GRB 101023A
  50. GRB 101023A: miniTAO/ANIR NIR detection
  51. GRB 101024A: Fermi GBM observation
  52. GGRB 101023A: GROND detection of the optical-NIR afterglow
  53. GRB 101017A: Swift/UVOT Observations
  54. Konus-Wind observation of GRB 101017A
  55. GRB 101014A: Fermi LAT detection
  56. GRB 101011A: Fermi GBM detection
  57. Konus-Wind observation of GRB 101014A
  58. GRB 100906A: D50 optical detection
  59. GRB 101011A: Zadko observatory - Gingin optical observations
  60. GRB101008A, GROND detection of a fading afterglow
  61. GRB 100924A: Suzaku WAM observation of the prompt emission
  62. GRB 100924A: Fermi GBM observation
  63. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  64. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  65. GRB 100925A/MAXI J1659-152 - NOT optical observations
  66. GRB 100925A / MAXI J1659-152: BOOTES-2/TELMA and IAC80 optical observations
  67. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  68. GRB 100915B: Fermi GBM observation
  69. GRB 100915A: Swift/UVOT Upper Limits
  70. GRB 100915A: Swift detection of a likely burst
  71. Swift BAT Trigger 433953 probably not a GRB
  72. GRB100909A: MITSuME Ishigakijima Optical upper limits
  73. GRB 100909A: Swift/UVOT observations
  74. GRB 100901A: errata of GRB name in GCN 11270
  75. GRB 100901A: optical observations in Mondy and R-light curve
  76. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  77. GRB100901A: IAO optical upper limits at 4 days after the burst
  78. GRB 100901A: CrAO optical observations
  79. Konus-Wind observation of GRB 100906A
  80. GRB100906A: non-detection at 15GHz
  81. GRB100906A: Optical observations at IAO
  82. GRB 100906A: TLS Monitoring
  83. GRB 100906A: Swift/UVOT Observations
  84. GRB100906A: Errata of MITSuME Okayama about observation time
  85. GRB100906A: MITSuME Okayama Optical Observation
  86. GRB 100905A: Swift/UVOT Upper Limits
  87. GRB 100901A: TLS observations, SDSS calibration, decay slope
  88. GRB100904A: BOOTES-3 Upper Limit
  89. Optical observations of GRB 100901A
  90. GRB10901A: Murikabushi telescope observation at 3 days after the burst
  91. GRB 100902A: UKIRT JK Observation
  92. GRB10901A: Optical observations at IAO
  93. Konus-Wind observation of GRB 100829A
  94. Tentative redshift of GRB100902A from Swift-XRT data
  95. GRB 100901A: optical observation at Mt.Terskol
  96. GRB 100901A: Kanata Telescope observation of the optical afterglow
  97. GRB100901A: MITSuME Okayama Optical Observation at 1 day after the burst
  98. GRB 100901A: TLS Observations: Break?
  99. GRB100901A: Errata of MITSuME Okayama about reference catalog
  100. GRB 100901A: SARA-N observations

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