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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"

32714 results found.

  1. GRB 110328A / Swift J164449.3+573451: LOAO R-band Observation
  2. GRB 110328A / Swift J164449.3+573451: PAIRITEL NIR Upper Limits
  3. GRB 110328A / Swift J164449.3+573451: optical observations
  4. GRB 110328A / Swift J164449.3+573451: EVLA Detection
  5. GRB 110328B: Fermi-LAT Detection
  6. GRB 110213A, the review of the sky area in plate archives
  7. GRB 110328A / Swift J164449.3+573451: NOT optical observations.
  8. GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
  9. GRB / X-ray transient 110328A: MITSuME OkayamaOptical upper limits
  10. GRB 110328A / Swift J164449.3+573451: PTF Quiescent Optical Counterpart
  11. GRB 110328A: a second trigger, probably a hard X-ray transient (Swift J164449.3+573451)
  12. GRB110318B : MOA optical upper limit
  13. GRB 110319B Swift-XRT afterglow confirmation
  14. GRB 101225A: revised analysis of narrow band imaging
  15. GRB 110319B BAT refined analysis
  16. GRB 110319B: Swift/UVOT Upper Limits
  17. GRB 110318B: Swift/UVOT Upper Limits
  18. GRB 110319B: GROND upper limits
  19. GRB 110319B: Swift-XRT afterglow candidate.
  20. GRB 110319A: Swift/UVOT Detection
  21. GRB 110319A: Swift-BAT refined analysis
  22. GRB 110319A: Swift-XRT refined Analysis
  23. GRB 110318B: GROND upper limits
  24. GRB 110318B: Swift-XRT refined Analysis
  25. GRB 110318A: Fermi GBM detection
  26. GRB 110318B: Swift-BAT refined analysis
  27. GRB 110318A: Swift-BAT refined analysis
  28. GRB 110315A: RTT150 optical observations
  29. GRB 110315A: Swift/UVOT Upper Limits
  30. GRB 110315A: Swift-XRT refined Analysis
  31. GRB 110315A: Swift-BAT refined analysis
  32. GRB 110315A: MASTER early optical observations
  33. GRB110312A: MITSuME Okayama Optical upper limits
  34. GRB 110312A: RTT150 optical observations
  35. GRB 110312A: Swift/UVOT Upper Limits
  36. GRB 110312A: Swift-XRT refined Analysis
  37. GRB 110312A: GROND Upper Limits
  38. GRB 110312A: Swift-BAT refined analysis
  39. GRB 110305A: REM detection of a possible NIR afterglow
  40. GRB 110305A: Swift/UVOT Upper Limits
  41. GRB 110305A: Swift-XRT refined Analysis
  42. GRB 110305A: Swift-BAT refined analysis
  43. GRB 110305A: GROND Detection of Optical Afterglow
  44. GRB 110223A: optical upper limits
  45. GRB101225A: early EVLA Observations of Christmas Burst
  46. Swift/UVOT observations of GRB110223A
  47. No IPN GRB detected in conjunction with candidate GRB 110215
  48. GRB GRB 110223A: MASTER VWF early optical observations
  49. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  50. Swift/UVOT observations of GRB110223b
  51. GRB 110223A: Swift-BAT refined analysis
  52. GRB 110223A: Liverpool Telescope observations
  53. GRB 110223A: Swift-XRT refined Analysis
  54. GRB 110223B: Swift-XRT refined Analysis
  55. GRB 110223B: Swift-BAT refined analysis
  56. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  57. GRB 101225A, the review of the sky area in plate archives
  58. GRB 110213B: Swift/UVOT observations
  59. GRB110213B: X-ray afterglow confirmation
  60. Fermi GBM detection of an SGR-like burst
  61. Swift XRT and UVOT Observations of OT 110215
  62. GRB 110213A: optical observations in CrAO
  63. GRB 110213B: GROND observations of the optical/NIR afterglow
  64. GRB 110213A: optical observations in Mondy
  65. GRB110205A: EVLA Observations
  66. Swift/UVOT observations of GRB110210a.
  67. GRB 110210A: optical upper limit
  68. GRB 110213B: Gemini South Redshift
  69. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  70. GRB 110210A: ROVOR Upper Limit
  71. GRB 110213A: YNAO-GMG Observations
  72. GRB 110213B: P60 Optical Afterglow Candidate
  73. GRB 110213A: TNT optical observations
  74. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  75. GRB 110212A: Swift XRT and UVOT observations
  76. Swift GRB110213A: interesting behaviour
  77. GRB 110213A: Fermi GBM observation
  78. GRB 110205A: Konkoly optical observations
  79. GRB 110213B: Swift XRT observation
  80. GRB 110213A: MITSuME Akeno Optical Observation
  81. Konus-Wind observation of GRB 110213A
  82. Konus-Wind observation of GRB 110213B
  83. GRB 110213A: Swift-XRT refined Analysis
  84. GRB 110213B: MAXI/GSC refined analysis
  85. GRB 110213A: Swift/UVOT refined analysis
  86. GRB 110213A: Lightbuckets Optical Observations
  87. GRB 110213A, Swift-BAT refined analysis
  88. GRB 110213A: optical observations
  89. GRB110212A: MITSuME Okayama optical upper limits
  90. GRB 110213A: KAIT observations
  91. GRB 110213A: GRAS011 optical observations
  92. GRB 110213A: Bok Telescope Redshift
  93. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  94. GRB 110213A: P60 Optical Afterglow Detection
  95. GRB 110212A: GRT Optical Observation
  96. GRB 110212A, Swift-BAT refined analysis
  97. GRB 110212A: SARA-N Optical Limits
  98. GRB 110212A: ROTSE-III Optical Limits
  99. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  100. Konus-Wind observation of GRB 110205A (correction to GCN 11659)

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