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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"

28124 results found.

  1. GRB070227: Swift-XRT refined analysis
  2. GRB 060605 new redshift
  3. GRB 070125, deep late-time optical observation
  4. VLA observation of GRB 070224
  5. GRB 070227: Swift/UVOT Upper Limits
  6. GRB 070227: TAROT La Silla observatory optical observations
  7. GRB 070227, Swift-BAT refined analysis
  8. GRB 070227: Swift detection of a burst in ground analysis
  9. GRB 070224: Swift/UVOT Upper Limits
  10. VLA observation of GRB 070223
  11. VLA observation of GRB 070220
  12. GRB070224: Magellan Imaging Observations
  13. GRB 070224: WHT K-band imaging
  14. GRB 070224: MDM Observations
  15. GRB070224: Gemini Imaging Observations
  16. GRB 070224: SARA upper limit
  17. GRB070224: Swift-XRT Refined Analysis
  18. GRB 070224: optical afterglow candidate
  19. GRB 070224, Swift-BAT refined analysis
  20. GRB 070224: MASTER-Net refind analysis
  21. GRB 070224: MASTER-VWF-Kislovodsk observations
  22. GRB 070224: Swift detection of a burst
  23. GRB 070223: Optical observations
  24. GRB070223: Swift/UVOT refined analysis
  25. GRB 070223: Optical-IR observation with KANATA
  26. GRB 070223, Swift-BAT refined analysis
  27. GRB070223: MASTER-VWF-Kislovodsk observations
  28. GRB 070223: Swift-XRT Refined Analysis
  29. GRB070223 - SDSS Pre-Burst Observations
  30. GRB 070223: MDM Observations
  31. GRB070223: Swift burst
  32. GRB 070220: MITSuME Okayama Optical Observation
  33. GRB 070220 Swift-BAT Refined Analysis
  34. Swift/UVOT refined analysis of GRB070220
  35. GRB 070209: Swift XRT refined analysis
  36. GRB 070220: Swift-XRT Refined Analysis
  37. GRB 070220: Observation with the KANATA 1.5m telescope
  38. GRB 070219: Gemini Observations
  39. GRB 070220: Swift detection of a burst
  40. GRB070219: MASTER-VWF-Kislovodsk observations
  41. GRB 070219: Swift/UVOT Upper limits
  42. GRB 070219: I-band observations
  43. GRB 070219, Swift-BAT refined analysis
  44. GRB 070219: optical TNG observations
  45. GRB070219 - SDSS Pre-Burst Observations
  46. GRB 070219: Swift detection of a burst
  47. GRB 070125 observations with the GMRT
  48. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  49. GRB 070129: MDM I-band Detection
  50. GRB 070125: Break in Optical Decay
  51. GRB 070209: Swift XRT analysis
  52. GRB 070201: clarification on localization and Konus-Wind spectra
  53. IPN localization of very bright long hard GRB 070207
  54. GRB 070209, Swift-BAT refined analysis of the short hard burst
  55. GRB 070208: Swift XRT refined analysis
  56. GRB 070208, Swift-BAT refined analysis
  57. GRB070208 - SDSS Pre-Burst Observations
  58. GRB 070208: Early IR detection and afterglow astrometry
  59. GRB 070208: Swift detection of a burst
  60. GRB 070125 detection with CARMA
  61. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  62. GRB 070129: afterglow confirmation
  63. GRB070126: Swift-XRT Observation
  64. GRB 070129: Swift/UVOT Upper limits
  65. GRB 070125: optical observation
  66. GRB 070129, Swift-BAT refined analysis of a particularly long
  67. GRB 070129: Xinglong TNT optical Upper Limit
  68. GRB 070129: Swift-XRT Refined Analysis
  69. GRB 070129: VLT observations
  70. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  71. GRB 070129: Swift detection of a burst
  72. GRB 070126: Swift/UVOT refined analysis
  73. GRB 070125: MITSuME Okayama optical observation
  74. GRB 070125: optical observations
  75. GRB 070126: VLT observations
  76. GRB 070124: Suzaku WAM observation of the prompt emissions
  77. GRB 070125: UVOT Detection in Ultraviolet Filters
  78. GRB 070126, Swift-BAT refined analysis of a very faint burst
  79. GRB070125: Optical observation by Kanata
  80. GRB070124: Swift-XRT Observation
  81. Possible GRB 070126: Swift/UVOT Upper Limit
  82. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  83. GRB 070125: Xinglong TNT optical observations
  84. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  85. GRB 070125: Lick 3m Spectroscopy
  86. GRB070125: Swift-XRT Refined Analysis
  87. GRB 070125: SARA detection in R
  88. GRB 070125: P60 Optical Afterglow Candidate
  89. GRB 070126?: Swift detection of a possible burst
  90. GRB070125 redshift request
  91. IPN localization of GRB070124 (short duration, hard spectrum)
  92. GRB 070110: Ep,i - Eiso correlation
  93. GRB 070107: Suzaku WAM observation of the prompt emission
  94. GRB070110: Swift XRT Team refined analysis
  95. GRB 070110, Swift-BAT refined analysis
  96. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  97. GRB 070110: Swift detection of a burst with a possible optical afterglow
  98. GRB 070107: Possible UVOT Afterglow
  99. GRB 070107, Swift-BAT refined analysis
  100. GRB 070107: Swift detection of a burst

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