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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"

32561 results found.

  1. GRB 101023A: Gemini discovery of optical afterglow
  2. GRB 101023A: REM NIR observations
  3. GRB 101011A: miniTAO/ANIR NIR upper limits
  4. GRB 101020A: MASTER prompt and afterglow limit
  5. GRB 101020A: MASTER polarization optical observations
  6. GRB 101020A, Swift-BAT refined analysis
  7. GRB 101017A: miniTAO/ANIR NIR upper limits
  8. GRB 101017A: Swift XRT refined analysis
  9. GRB 101017A: Swift/UVOT Observations
  10. GRB 101008A: correction to the GCN 11352
  11. GRB 101008A: optical observations
  12. GRB101017A: MITSuME Okayama optical upper limits
  13. Konus-Wind observation of GRB 101017A
  14. GRB 101014A: Fermi LAT detection
  15. GRB 101017A: Swift-BAT refined analysis
  16. GRB 101017A: ROTSE-III Optical Limits
  17. GRB 101011A: Fermi GBM detection
  18. Konus-Wind observation of GRB 101014A
  19. GRB 100906A: D50 optical detection
  20. GRB 100902A: D50 optical limit
  21. GRB 101011A: Swift/UVOT observations
  22. GRB 101011A, GROND upper limits
  23. GRB 101011A: Zadko observatory - Gingin optical observations
  24. GRB 101011A: XRT Refined Analysis
  25. GRB 101011A: Swift/UVOT Observations of a Possible Optical Afterglow
  26. GRB 101011A: Swift-BAT refined analysis
  27. GRB 101008A: Fermi GBM observation
  28. GRB 101008A: MASTER prompt optical observations (correction to GCN#11328)
  29. GRB 101008A: MASTER prompt optical observations
  30. GRB 101008A: Swift-BAT refined analysis
  31. GRB101008A, GROND detection of a fading afterglow
  32. GRB 101008A: Swift-XRT refined analysis
  33. GRB 101008A: SAO RAS optical observations
  34. GRB 100915 optical upper limit
  35. GRB 101008: Swift/UVOT Upper Limits
  36. GRB 100728B: X-shooter redshift
  37. GRB 100925A / MAXI J1659-152: MASTER optical observations
  38. GRB 100924A: Suzaku WAM observation of the prompt emission
  39. GRB 100928A, Swift-BAT refined analysis
  40. GRB 100924A: Fermi GBM observation
  41. GRB 100925A / MAXI J1659-152: WSRT Radio and Polarization Detection
  42. GRB 100925A / MAXI J1659-152: Optical observation with the Kottamia 188cm telescope
  43. GRB100925A/MAXI J1659-152: X-shooter identification as an X-ray binary
  44. GRB100925A/MAXI J1659-152 MITSuME Ishigakijima and Okayama Optical Observation
  45. GRB 100925A / MAXI J1659-152: SARA-S Observations
  46. GRB100925A/MAXI J1659-152: Galactic origin from SED analysis
  47. GRB 100925A/MAXI J1659-152 - NOT optical observations
  48. GRB 100925A / MAXI J1659-152: BOOTES-2/TELMA and IAC80 optical observations
  49. MAXI J1659-152: Swift-BAT refined analysis (triggers 434928 and 434931)
  50. GRB 100925A: Nearby DSS Source - SN-GRB or new Galactic transient?
  51. GRB100925A UVOT afterglow
  52. GRB 100924A: GROND detection of an optical/NIR afterglow
  53. GRB 100924A: Swift-BAT refined analysis
  54. GRB100906A: Ashra-1 observation of early optical emission
  55. GRB 100917A: Swift-BAT refined analysis
  56. GRB100915A: MITSuME Ishigakijima Optical upper limits
  57. GRB 100915B: GRT Optical Observation
  58. GRB 100915A: GRT Optical Observation
  59. GRB 100915B: Fermi GBM observation
  60. GRB 100915A: Correction to Swift-BAT refined analysis
  61. GRB 100915A: Swift/UVOT Upper Limits
  62. GRB 100915A: Swift-BAT refined analysis
  63. GRB 100915A: Swift-XRT refined analysis
  64. GRB100909A: MITSuME Ishigakijima Optical upper limits
  65. GRB 100909A: Swift/UVOT observations
  66. GRB 100901A: errata of GRB name in GCN 11270
  67. GRB 100901A: optical observations in Mondy and R-light curve
  68. GRB 100909A: Swift-XRT refined analysis
  69. GRB 100906A: optical observations at Mt.Terskol
  70. GRB 100901A: optical observation in Maidanak, break confirmation
  71. GRB 100909A: Faulkes Telescope North afterglow candidate
  72. GRB 100909A: ROTSE-III Optical Limits
  73. GRB 100902A : Confirmation of afterglow and re-brightening with CFHT r’-band imaging
  74. GRB100901A: IAO optical upper limits at 4 days after the burst
  75. EVLA detection of radio afterglow of GRB100901A
  76. GRB 100901A: Confirmation of WSRT Radio Detection
  77. GRB 100901A: CrAO optical observations
  78. GRB 100906A: RTT150 optical observations
  79. GRB 100906A: GRAS-007 optical observations
  80. GRB100906A: R band observations
  81. Konus-Wind observation of GRB 100906A
  82. GRB100906A: Optical observations at IAO
  83. GRB 100906A: Fermi GBM observation
  84. GRB 100906A: TLS Monitoring
  85. GRB 100901A: TLS Detection at 5.5 days
  86. GRB 100906A: Observations at the Virtual Telescope
  87. GRB 100906A: Swift-XRT refined analysis
  88. GRB 100906A: Swift/UVOT Observations
  89. GRB100906A: Errata of MITSuME Okayama about observation time
  90. GRB100906A: MITSuME Okayama Optical Observation
  91. GRB 100906A: Ondrejov 65cm observations
  92. GRB 100906A: TLS Multicolor Observations
  93. GRB 100905A: Swift/UVOT Upper Limits
  94. GRB 100901A: TLS observations, SDSS calibration, decay slope
  95. GRB 100906A: MASTER preliminary prompt+afterglow lc
  96. GRB 100901A: ISON-NM optical observations
  97. GRB 100906A: Swift-BAT refined analysis
  98. GRB 100906A: UKIRT zYJHK Observation
  99. GRB 100906A: MASTER preliminary polarization prompt light curve
  100. GRB 100906A: Gemini-N/GMOS redshift

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