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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"

23729 results found.

  1. Konus-Wind observation of GRB 110503A
  2. GRB 110422A: MASTER first 30 min OT light curve
  3. GRB 110503A: R-band Detection
  4. GRB 110503A: SARA-N Observations and Photometric Calibration
  5. GRB 110503A: Swift/UVOT Observations
  6. GRB 110503A: Swift-XRT refined Analysis
  7. GRB 110503A: redshift confirmation from TNG
  8. GRB 110503A - TLS Afterglow Observations
  9. GRB 110503A: Swift-BAT refined analysis
  10. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  11. GRB 110428A : X-ray afterglow confirmation
  12. GRB 110428A: Suzaku WAM observation of the prompt emission
  13. GRB 110428A : Swift-XRT observations
  14. Konus-Wind observation of GRB 110428A
  15. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  16. GRB 110426A: MAXI/GSC detection of a GRB
  17. GRB 110422A: tentative redshift from TNG
  18. GRB 110422A: Suzaku WAM observation of the prompt emission
  19. GRB 110422A: Herschel observation scheduled
  20. GRB110422A: MITSuME Ishigakijima Optical Observation
  21. Konus-Wind observation of GRB 110422A
  22. GRB 110422A: Further NOT observation
  23. GRB 110422A: TNG optical observations
  24. GRB 110422A: MASTER earlier OT polarization observations
  25. GRB 110422A: Swift-BAT refined analysis
  26. GRB 110422A: Swift detection of a burst
  27. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  28. Konus-Wind observation of GRB 110420A
  29. GRB 110420B, GROND observations
  30. GRB 110420B: Swift-BAT refined analysis
  31. GRB 110420A: Swift-BAT refined analysis
  32. GRB 110420B: Swift detection of a short hard burst
  33. GRB 110420A: Swift detection of a burst with optical counterpart
  34. GRB110414A: MITSuME Ishigakijima Optical upper limits
  35. GRB 110414A: GROND upper limits
  36. GRB110414A: MITSuME Okayama Optical upper limits
  37. GRB 110414A: Swift-BAT Refined Analysis
  38. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  39. GRB 110414A : Faulkes Telescope North observations
  40. GRB 110414A: Swift detection of a burst
  41. GRB 110412A: Swift-BAT refined analysis
  42. GRB 110411A: optical limits from OSN
  43. GRB 110411A: MASTER prompt and follow-up optical limits
  44. GRB 110412A: Swift detection of a burst
  45. GRB 110411A, Swift-BAT refined analysis
  46. GRB 110411A: MASTER optical observations
  47. GRB 110411A: Swift detection of a burst
  48. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  49. GRB 110328A / Swift J164449.3+573451: optical observations
  50. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  51. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  52. GRB 110407A: MASTER optical observations
  53. GRB 110407A: GROND Detection of the Optical Afterglow
  54. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
  55. GRB 110407A: Enhanced Swift-XRT position
  56. GRB 110407A: Swift-BAT refined analysis
  57. IPN triangulation of the bright GRB110406A
  58. GRB 110407A : Lulin optical afterglow detection
  59. GRB 110407A: MASTER early optical observations
  60. GRB 110407A: Swift detection of a burst
  61. Konus-Wind observation of GRB 110406A
  62. GRB 110328A/Swift J164449.3+573451: BAT recent rate increase and pre-outburst,light curve
  63. GRB 110406A: An exceptionally bright burst detected by INTEGRAL SPI-ACS
  64. Redshift of GRB 110402A theoretically estimated
  65. GRB 110402A: Suzaku WAM observation of the prompt emission
  66. GRB 110328A / Swift J164449.3+573451: Keck LRIS R-band photometry
  67. GRB 110328A / Swift J164449.3+573451: millimeter detection at PdBI
  68. GRB 110402A: Konus-Wind spectral lags and detailed energetics
  69. GRB 110401A: Fermi GBM detection
  70. GRB 110402A: MITSuME Okayama and Ishigakijima Optical upper limits
  71. Konus-Wind observation of GRB 110402A
  72. GRB 110402A: Swift-BAT refined analysis
  73. GRB 110402A: early optical limit by "Pi of the Sky"
  74. GRB 110402A: further NOT observations
  75. GRB 110402A: NOT afterglow confirmation
  76. GRB 110402A: Liverpool Telescope Observations
  77. GRB 110402A: Swift detection of a burst
  78. GRB 110328A / Swift J164449.3+573451: Radio-optical/NIR Astrometry
  79. GRB 110328A / Swift J164449.3+573451: X-ray analysis and a mini-blazar analogy
  80. GRB 110328A / Swift J164449.3+573451: BAT refined analysis
  81. GRB 110328A / Swift J164449.3+573451: optical observations
  82. GRB 110213A, the review of the sky area in plate archives
  83. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  84. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  85. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  86. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  87. GRB 110328A: Swift detection of a burst
  88. GRB 110319B BAT refined analysis
  89. GRB 110319B: GROND upper limits
  90. GRB 110319B found in ground analysis of Swift-BAT data
  91. GRB 110319A: Swift/UVOT Detection
  92. GRB 110319A: Swift-BAT refined analysis
  93. GRB 110318B: GROND upper limits
  94. GRB 110319A: Swift detection of a burst
  95. GRB 110318A: Fermi GBM detection
  96. GRB 110318B: Swift-BAT refined analysis
  97. GRB 110318A: Swift-BAT refined analysis
  98. GRB 110318B: Swift detection of a burst
  99. GRB 110318A: Swift detection of a burst
  100. GRB 110315A: RTT150 optical observations

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