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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"

43039 results found.

  1. GRB 110503A optical observation
  2. GRB 110426A: Fermi GBM detection
  3. GRB 110428A: Fermi-GBM observation
  4. GRB 110503A: TAROT Calern observatory optical observations
  5. GRB 110503A: Jet Break seen from TLS
  6. GRB 110503A optical observations
  7. Konus-Wind observation of GRB 110503A
  8. GRB 110422A: Herschel FIR observation preliminary report
  9. GRB 110503A: R-band Detection
  10. GRB 110503A: Centimeter observation from EVLA
  11. GRB 110503A: Millimeter observation from SMA
  12. GRB 110503A: SARA-N Observations and Photometric Calibration
  13. GRB 110503A: Swift/UVOT Observations
  14. GRB 110503A: Swift-XRT refined Analysis
  15. GRB 110503A: PAIRITEL NIR Detection
  16. GRB 110503A: redshift confirmation from TNG
  17. GRB 110503A - TLS Afterglow Observations
  18. GRB 110503A: Swift-BAT refined analysis
  19. GRB 110503A: NOT afterglow photometry
  20. GRB 110503A: Redshift from 10.4m GTC
  21. GRB 110503A: Enhanced Swift-XRT position
  22. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  23. GRB 110426A: Swift/XRT non-detection
  24. GRB 110428A : X-ray afterglow confirmation
  25. GRB 110428A: Suzaku WAM observation of the prompt emission
  26. Fermi-GBM data processing and delivery
  27. GRB 110422A: optical observations in CrAO
  28. GRB 110422A: Update of Herschel FIR observation schedule
  29. GRB 110428A : Swift-XRT observations
  30. Konus-Wind observation of GRB 110428A
  31. GRB 110428A: Fermi-LAT Detection
  32. GRB 110426A: MAXI/GSC detection of a GRB
  33. GRB 110422A: Redshift confirmation from GTC
  34. GRB 110422A: tentative redshift from TNG
  35. GRB 110422A: Suzaku WAM observation of the prompt emission
  36. GRB 110422A: Herschel observation scheduled
  37. GRB110422A: NOT optical follow-ups
  38. GRB 110422A: optical observations in CrAO
  39. GRB110422A: MITSuME Ishigakijima Optical Observation
  40. Konus-Wind observation of GRB 110422A
  41. GRB 110422A: Further NOT observation
  42. GRB 110422A: Swift/UVOT Detection of optical afterglow
  43. GRB 110422A: Swift-XRT refined Analysis
  44. GRB 110422A: THO optical observations
  45. GRB 110422A: Enhanced Swift-XRT position
  46. GRB 110422A: TNG optical observations
  47. GRB 110422A: SAO RAS optical observations
  48. GRB 110422A: NOT optical observation
  49. GRB 110422A: MASTER earlier OT polarization observations
  50. GRB 110422A: Swift-BAT refined analysis
  51. GRB 110422A: Swift detection of a burst
  52. GRB 110420B: Swift/UVOT Upper Limits
  53. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  54. GRB 110420B: Swift-XRT afterglow candidate retraction
  55. GRB 110420B: Fermi GBM observation
  56. Konus-Wind observation of GRB 110420A
  57. GRB 110420B: Spectral lag indicates short hard burst
  58. GRB 110420B, GROND observations
  59. GRB 110420A Swift/UVOT Observations
  60. GRB 110420B: Swift-XRT afterglow candidate
  61. GRB 110420B: Swift-BAT refined analysis
  62. GRB 110420A: Swift-BAT refined analysis
  63. GRB 110420B: Swift detection of a short hard burst
  64. GRB 110420A: Swift-XRT refined Analysis
  65. GRB 110420A: Enhanced Swift-XRT position
  66. GRB 110420A: Swift detection of a burst with optical counterpart
  67. GRB110414A: MITSuME Ishigakijima Optical upper limits
  68. GRB 110414A: GROND upper limits
  69. GRB110414A: MITSuME Okayama Optical upper limits
  70. GRB 110414A: Swift-BAT Refined Analysis
  71. GRB 110414A: Swift/UVOT Upper limits
  72. GRB 110414A: Swift-XRT refined Analysis
  73. GRB 110414A: Enhanced Swift-XRT position
  74. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  75. GRB 110414A : Faulkes Telescope North observations
  76. GRB 110414A: Swift detection of a burst
  77. GRB 110411A: PAIRITEL NIR Upper Limits
  78. GRB 110412A: Swift-BAT refined analysis
  79. GRB 110411A: optical limits from OSN
  80. GRB 110412A: Fermi GBM observation
  81. GRB 110411A: Swift/UVOT Upper Limits
  82. GRB 110411A: MASTER prompt and follow-up optical limits
  83. GRB 110411A : Xinglong TNT OT candidate
  84. GRB 110412A: Swift detection of a burst
  85. GRB 110411A, Swift-BAT refined analysis
  86. GRB 110411A: Enhanced Swift-XRT position
  87. GRB 110411A: MASTER optical observations
  88. GRB 110411A: Swift detection of a burst
  89. GRB 110328A / Swift J164449.3+573451: R-band Monitoring
  90. GRB 110407A: Swift-XRT refined Analysis
  91. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  92. GRB 110407A:VLF observations on 20.27kHz
  93. GRB 110328A / Swift J164449.3+573451: optical observations
  94. GRB 110328A / Swift J164449.3+573451: VLBA Observations
  95. GRB 110328A/Swift J164449.3+573451 UVOT Upper Limits
  96. GRB 110406A: Positional coincidence with NGC 404
  97. GRB 110407A: MASTER optical observations
  98. GRB110407A: UVOT Upper Limits
  99. GRB 110407A: GROND Detection of the Optical Afterglow
  100. GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits

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