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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"

45726 results found.

  1. GRB 110610A: Swift-BAT refined analysis
  2. Swift detection of the X-ray afterglow of GRB 110604A
  3. GRB 110610A: MASTER-NET optical observations
  4. GRB 110610A: Swift detection of a burst
  5. Konus-Wind observation of GRB 110604A
  6. GRB 110604A Detection by IPN Spacecraft and Swift-BAT
  7. GRB 110530A: optical observations in Mondy observatory
  8. GRB 110529A: Suzaku WAM observation of the prompt emission
  9. GMRT detection of GRB 110328A
  10. GRB 110530A: optical observations at Mt. Terskol, second epoch
  11. GRB 110530A: Swift-XRT refined Analysis
  12. GRB 110530A: Swift/UVOT Detection of a Fading Afterglow
  13. GRB 110530A: Xinglong TNT observation
  14. GRB 110530A: Enhanced Swift-XRT position
  15. GRB 110530A: NOT optical observations
  16. GRB110530A: MITSuME Okayama Optical Observation
  17. GRB 110530A: optical observations at Mt. Terskol
  18. GRB 110530A: MASTER OT observations
  19. GRB 110530A: Swift-BAT refined analysis
  20. GRB 110530A: MITSuME Akeno Optical Observation
  21. GRB 110529A: Fermi GBM detection
  22. GRB 110530A: Swift detection of a burst with an optical afterglow
  23. Konus-Wind observation of GRB 110529A
  24. LAT Observations of GRB110529A
  25. EVLA afterglow limits on the high z GRB090429B
  26. Fermi Gamma-ray Burst Monitor trigger 328195911 is not a GRB
  27. Swift J1644+57/GRB 110328A, Additional HST Observations
  28. GRB 110521A: MASTER prompt optical limit
  29. GRB 110521A: Swift/UVOT Upper Limits
  30. GRB 110521A: Swift-XRT refined analysis
  31. GRB 110520A: NOT optical follow-ups
  32. GRB 110521A - NOT optical observation
  33. GRB 110521A: Swift-BAT refined analysis
  34. GRB 110521A: Enhanced Swift-XRT position
  35. GRB 110521A: MASTER synchronous and early optical observations limit
  36. Swift/UVOT observations of GRB110520A
  37. GRB 110521A: Swift detection of a burst
  38. GRB 110520A: Swift-BAT refined analysis
  39. GRB 110520A: IAC80 I-band observations
  40. GRB 110520A: Swift-XRT refined Analysis
  41. GRB 110520A: Enhanced Swift-XRT position
  42. GRB 110520A: WHT IR observations
  43. GRB 110520A - NOT optical observation
  44. GRB 110520A: Skynet/DAO optical observations
  45. GRB 110520A: Liverpool Telescope Observations
  46. GRB 110520A: TAROT Calern observatory optical observations
  47. GRB 110520A: MASTER-NET optical observations
  48. GRB 110520A: Swift detection of a burst
  49. Konus-Wind observation of GRB 110518A
  50. IPN localization of bright GRB 110518A
  51. Radio observations of GRB 110428A with the EVLA
  52. GRB 110519A, Swift-BAT refined analysis
  53. GRB 110519A: Swift detection of a burst
  54. GRB 110503A optical observation
  55. GRB 110426A: Fermi GBM detection
  56. GRB 110428A: Fermi-GBM observation
  57. GRB 110503A: TAROT Calern observatory optical observations
  58. GRB 110503A: Jet Break seen from TLS
  59. GRB 110503A optical observations
  60. Konus-Wind observation of GRB 110503A
  61. GRB 110422A: MASTER first 30 min OT light curve
  62. GRB 110422A: Herschel FIR observation preliminary report
  63. GRB 110503A: optical observation in CrAO
  64. GRB 110503A: R-band Detection
  65. GRB 110503A: Centimeter observation from EVLA
  66. GRB 110503A: Millimeter observation from SMA
  67. GRB 110503A: SARA-N Observations and Photometric Calibration
  68. GRB 110503A: Swift/UVOT Observations
  69. GRB 110503A: Swift-XRT refined Analysis
  70. GRB 110503A: PAIRITEL NIR Detection
  71. GRB 110503A: redshift confirmation from TNG
  72. GRB 110503A - TLS Afterglow Observations
  73. GRB 110503A: Swift-BAT refined analysis
  74. GRB 110503A: NOT afterglow photometry
  75. GRB 110503A: Redshift from 10.4m GTC
  76. GRB 110503A: Enhanced Swift-XRT position
  77. GRB 110503A: Swift detection of a burst with a bright optical counterpart
  78. GRB 110426A: Swift/XRT non-detection
  79. GRB 110428A : X-ray afterglow confirmation
  80. GRB 110428A: Suzaku WAM observation of the prompt emission
  81. Fermi-GBM data processing and delivery
  82. GRB 110422A: optical observations in CrAO
  83. GRB 110422A: Update of Herschel FIR observation schedule
  84. GRB 110428A : Swift-XRT observations
  85. Konus-Wind observation of GRB 110428A
  86. GRB 110428A: Fermi-LAT Detection
  87. GRB 110426A: MASTER synchronous with MAXI/GSC observations
  88. GRB 110426A: MAXI/GSC detection of a GRB
  89. GRB 110422A: optical observations in CrAO, second epoch
  90. GRB 110422A: Redshift confirmation from GTC
  91. GRB 110422A: tentative redshift from TNG
  92. GRB 110422A: Suzaku WAM observation of the prompt emission
  93. GRB 110422A: Herschel observation scheduled
  94. GRB110422A: NOT optical follow-ups
  95. GRB 110422A: optical observations in CrAO
  96. GRB110422A: MITSuME Ishigakijima Optical Observation
  97. Konus-Wind observation of GRB 110422A
  98. GRB 110422A: Further NOT observation
  99. GRB 110422A: Swift/UVOT Detection of optical afterglow
  100. GRB 110422A: Swift-XRT refined Analysis

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