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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"

32763 results found.

  1. GRB 110521A: Swift-BAT refined analysis
  2. GRB 110521A: MASTER synchronous and early optical observations limit
  3. Swift/UVOT observations of GRB110520A
  4. GRB 110520A: Swift-BAT refined analysis
  5. GRB 110520A: IAC80 I-band observations
  6. GRB 110520A: Swift-XRT refined Analysis
  7. GRB 110520A: WHT IR observations
  8. GRB 110520A - NOT optical observation
  9. GRB 110520A: Liverpool Telescope Observations
  10. Konus-Wind observation of GRB 110518A
  11. IPN localization of bright GRB 110518A
  12. Radio observations of GRB 110428A with the EVLA
  13. GRB 110519A, Swift-BAT refined analysis
  14. GRB 110503A optical observation
  15. GRB 110426A: Fermi GBM detection
  16. GRB 110428A: Fermi-GBM observation
  17. GRB 110503A: TAROT Calern observatory optical observations
  18. GRB 110503A: Jet Break seen from TLS
  19. GRB 110503A optical observations
  20. Konus-Wind observation of GRB 110503A
  21. GRB 110422A: MASTER first 30 min OT light curve
  22. GRB 110422A: Herschel FIR observation preliminary report
  23. GRB 110503A: optical observation in CrAO
  24. GRB 110503A: R-band Detection
  25. GRB 110503A: Centimeter observation from EVLA
  26. GRB 110503A: Millimeter observation from SMA
  27. GRB 110503A: SARA-N Observations and Photometric Calibration
  28. GRB 110503A: Swift/UVOT Observations
  29. GRB 110503A: Swift-XRT refined Analysis
  30. GRB 110503A: PAIRITEL NIR Detection
  31. GRB 110503A: redshift confirmation from TNG
  32. GRB 110503A - TLS Afterglow Observations
  33. GRB 110503A: Swift-BAT refined analysis
  34. GRB 110503A: NOT afterglow photometry
  35. GRB 110426A: Swift/XRT non-detection
  36. GRB 110428A : X-ray afterglow confirmation
  37. GRB 110428A: Suzaku WAM observation of the prompt emission
  38. Fermi-GBM data processing and delivery
  39. GRB 110422A: optical observations in CrAO
  40. GRB 110428A : Swift-XRT observations
  41. Konus-Wind observation of GRB 110428A
  42. GRB 110422A: optical observations in CrAO, second epoch
  43. GRB 110422A: tentative redshift from TNG
  44. GRB 110422A: Suzaku WAM observation of the prompt emission
  45. GRB110422A: NOT optical follow-ups
  46. GRB 110422A: optical observations in CrAO
  47. GRB110422A: MITSuME Ishigakijima Optical Observation
  48. Konus-Wind observation of GRB 110422A
  49. GRB 110422A: Further NOT observation
  50. GRB 110422A: Swift/UVOT Detection of optical afterglow
  51. GRB 110422A: Swift-XRT refined Analysis
  52. GRB 110422A: CQUEAN griz Observation
  53. GRB 110422A: THO optical observations
  54. GRB 110422A: correction to the GCN circ. 11958
  55. GRB 110422A: TNG optical observations
  56. GRB 110422A: SAO RAS optical observations
  57. GRB 110422A: NOT optical observation
  58. GRB 110422A: MASTER earlier OT polarization observations
  59. GRB 110422A: Swift-BAT refined analysis
  60. GRB 110422A: Mondy optical observations
  61. GRB 110420B: Swift/UVOT Upper Limits
  62. GRB110420A: GROND detection of the Optical/NIR Afterglow Candidate
  63. GRB 110420B: Swift-XRT afterglow candidate retraction
  64. GRB 110420B: Fermi GBM observation
  65. Konus-Wind observation of GRB 110420A
  66. GRB 110420B, GROND observations
  67. GRB 110420A Swift/UVOT Observations
  68. GRB 110420B: Swift-XRT afterglow candidate
  69. GRB 110420B: Swift-BAT refined analysis
  70. GRB 110420A: Swift-BAT refined analysis
  71. GRB 110420A: Swift-XRT refined Analysis
  72. GRB110414A: MITSuME Ishigakijima Optical upper limits
  73. GRB 110414A: GROND upper limits
  74. GRB110414A: MITSuME Okayama Optical upper limits
  75. GRB 110414A: Swift-BAT Refined Analysis
  76. GRB 110414A: Swift/UVOT Upper limits
  77. GRB 110414A: Swift-XRT refined Analysis
  78. GRB 110328A / Swift J164449.3+573451: WISE quiescent source upper limit
  79. GRB 110414A : Faulkes Telescope North observations
  80. GRB 110411A: PAIRITEL NIR Upper Limits
  81. GRB 110412A: Swift-BAT refined analysis
  82. GRB 110411A: Swift-XRT refined Analysis
  83. GRB 110412A: Fermi GBM observation
  84. GRB 110411A: Swift/UVOT Upper Limits
  85. GRB 110411A: MASTER prompt and follow-up optical limits
  86. GRB 110411A : Xinglong TNT OT candidate
  87. GRB 110411A, Swift-BAT refined analysis
  88. GRB 110328A / Swift J164449.3+573451: R-band Monitoring
  89. GRB 110407A: Swift-XRT refined Analysis
  90. GRB 110328A / Swift J164449.3+573451: MASTER pre, prompt and follow-up observations
  91. GRB 110407A:VLF observations on 20.27kHz
  92. GRB 110328A / Swift J164449.3+573451: optical observations
  93. GRB 110407A: SMARTS optical limit
  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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