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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"

28116 results found.

  1. GRB 070224: Swift/UVOT Upper Limits
  2. VLA observation of GRB 070223
  3. VLA observation of GRB 070220
  4. GRB070224: Magellan Imaging Observations
  5. GRB 070224: WHT K-band imaging
  6. GRB 070224: MDM Observations
  7. GRB070224: Gemini Imaging Observations
  8. GRB 070224: SARA upper limit
  9. GRB070224: Swift-XRT Refined Analysis
  10. GRB 070224: optical afterglow candidate
  11. GRB 070224, Swift-BAT refined analysis
  12. GRB 070224: MASTER-Net refind analysis
  13. GRB 070224: MASTER-VWF-Kislovodsk observations
  14. GRB 070224: Swift detection of a burst
  15. GRB 070223: Optical observations
  16. GRB070223: Swift/UVOT refined analysis
  17. GRB 070223: Optical-IR observation with KANATA
  18. GRB 070223, Swift-BAT refined analysis
  19. GRB070223: MASTER-VWF-Kislovodsk observations
  20. GRB 070223: Swift-XRT Refined Analysis
  21. GRB070223 - SDSS Pre-Burst Observations
  22. GRB 070223: MDM Observations
  23. GRB070223: Swift burst
  24. GRB 070220: MITSuME Okayama Optical Observation
  25. GRB 070220 Swift-BAT Refined Analysis
  26. Swift/UVOT refined analysis of GRB070220
  27. GRB 070209: Swift XRT refined analysis
  28. GRB 070220: Swift-XRT Refined Analysis
  29. GRB 070220: Observation with the KANATA 1.5m telescope
  30. GRB 070219: Gemini Observations
  31. GRB 070220: Swift detection of a burst
  32. GRB070219: MASTER-VWF-Kislovodsk observations
  33. GRB 070219: Swift/UVOT Upper limits
  34. GRB 070219: I-band observations
  35. GRB 070219, Swift-BAT refined analysis
  36. GRB 070219: optical TNG observations
  37. GRB070219 - SDSS Pre-Burst Observations
  38. GRB 070219: Swift detection of a burst
  39. GRB 070125 observations with the GMRT
  40. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  41. GRB 070129: MDM I-band Detection
  42. GRB 070125: Break in Optical Decay
  43. GRB 070209: Swift XRT analysis
  44. GRB 070201: clarification on localization and Konus-Wind spectra
  45. IPN localization of very bright long hard GRB 070207
  46. GRB 070209, Swift-BAT refined analysis of the short hard burst
  47. GRB 070208: Swift XRT refined analysis
  48. GRB 070208, Swift-BAT refined analysis
  49. GRB070208 - SDSS Pre-Burst Observations
  50. GRB 070208: Early IR detection and afterglow astrometry
  51. GRB 070208: Swift detection of a burst
  52. GRB 070125 detection with CARMA
  53. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  54. GRB 070129: afterglow confirmation
  55. GRB070126: Swift-XRT Observation
  56. GRB 070129: Swift/UVOT Upper limits
  57. GRB 070125: optical observation
  58. GRB 070129, Swift-BAT refined analysis of a particularly long
  59. GRB 070129: Xinglong TNT optical Upper Limit
  60. GRB 070129: Swift-XRT Refined Analysis
  61. GRB 070129: VLT observations
  62. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  63. GRB 070129: Swift detection of a burst
  64. GRB 070126: Swift/UVOT refined analysis
  65. GRB 070125: MITSuME Okayama optical observation
  66. GRB 070125: optical observations
  67. GRB 070126: VLT observations
  68. GRB 070124: Suzaku WAM observation of the prompt emissions
  69. GRB 070125: UVOT Detection in Ultraviolet Filters
  70. GRB 070126, Swift-BAT refined analysis of a very faint burst
  71. GRB070125: Optical observation by Kanata
  72. GRB070124: Swift-XRT Observation
  73. Possible GRB 070126: Swift/UVOT Upper Limit
  74. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  75. GRB 070125: Xinglong TNT optical observations
  76. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  77. GRB 070125: Lick 3m Spectroscopy
  78. GRB070125: Swift-XRT Refined Analysis
  79. GRB 070125: SARA detection in R
  80. GRB 070125: P60 Optical Afterglow Candidate
  81. GRB 070126?: Swift detection of a possible burst
  82. GRB070125 redshift request
  83. IPN localization of GRB070124 (short duration, hard spectrum)
  84. GRB 070110: Ep,i - Eiso correlation
  85. GRB 070107: Suzaku WAM observation of the prompt emission
  86. GRB070110: Swift XRT Team refined analysis
  87. GRB 070110, Swift-BAT refined analysis
  88. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  89. GRB 070110: Swift detection of a burst with a possible optical afterglow
  90. GRB 070107: Possible UVOT Afterglow
  91. GRB 070107, Swift-BAT refined analysis
  92. GRB 070107: Swift detection of a burst
  93. VLA observation of GRB 061222B
  94. VLA detection of GRB 061222A
  95. GRB070103: APO SPIcam i' and z' limits
  96. GRB070103: KPNO 4m+FLAMINGOS J limit
  97. GRB 070103: Swift/UVOT Upper limits
  98. GRB070103: Swift XRT refined analysis
  99. GRB 070103, Swift-BAT refined analysis
  100. GRB 070103: NOT observations

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