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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"

28100 results found.

  1. GRB 070223: Optical-IR observation with KANATA
  2. GRB 070223, Swift-BAT refined analysis
  3. GRB070223: MASTER-VWF-Kislovodsk observations
  4. GRB 070223: Swift-XRT Refined Analysis
  5. GRB070223 - SDSS Pre-Burst Observations
  6. GRB 070223: MDM Observations
  7. GRB070223: Swift burst
  8. GRB 070220: MITSuME Okayama Optical Observation
  9. GRB 070220 Swift-BAT Refined Analysis
  10. Swift/UVOT refined analysis of GRB070220
  11. GRB 070209: Swift XRT refined analysis
  12. GRB 070220: Swift-XRT Refined Analysis
  13. GRB 070220: Observation with the KANATA 1.5m telescope
  14. GRB 070219: Gemini Observations
  15. GRB 070220: Swift detection of a burst
  16. GRB070219: MASTER-VWF-Kislovodsk observations
  17. GRB 070219: Swift/UVOT Upper limits
  18. GRB 070219: I-band observations
  19. GRB 070219, Swift-BAT refined analysis
  20. GRB 070219: optical TNG observations
  21. GRB070219 - SDSS Pre-Burst Observations
  22. GRB 070219: Swift detection of a burst
  23. GRB 070125 observations with the GMRT
  24. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  25. GRB 070129: MDM I-band Detection
  26. GRB 070125: Break in Optical Decay
  27. GRB 070209: Swift XRT analysis
  28. GRB 070201: clarification on localization and Konus-Wind spectra
  29. IPN localization of very bright long hard GRB 070207
  30. GRB 070209, Swift-BAT refined analysis of the short hard burst
  31. GRB 070208: Swift XRT refined analysis
  32. GRB 070208, Swift-BAT refined analysis
  33. GRB070208 - SDSS Pre-Burst Observations
  34. GRB 070208: Early IR detection and afterglow astrometry
  35. GRB 070208: Swift detection of a burst
  36. GRB 070125 detection with CARMA
  37. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  38. GRB 070129: afterglow confirmation
  39. GRB070126: Swift-XRT Observation
  40. GRB 070129: Swift/UVOT Upper limits
  41. GRB 070125: optical observation
  42. GRB 070129, Swift-BAT refined analysis of a particularly long
  43. GRB 070129: Xinglong TNT optical Upper Limit
  44. GRB 070129: Swift-XRT Refined Analysis
  45. GRB 070129: VLT observations
  46. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  47. GRB 070129: Swift detection of a burst
  48. GRB 070126: Swift/UVOT refined analysis
  49. GRB 070125: MITSuME Okayama optical observation
  50. GRB 070125: optical observations
  51. GRB 070126: VLT observations
  52. GRB 070124: Suzaku WAM observation of the prompt emissions
  53. GRB 070125: UVOT Detection in Ultraviolet Filters
  54. GRB 070126, Swift-BAT refined analysis of a very faint burst
  55. GRB070125: Optical observation by Kanata
  56. GRB070124: Swift-XRT Observation
  57. Possible GRB 070126: Swift/UVOT Upper Limit
  58. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  59. GRB 070125: Xinglong TNT optical observations
  60. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  61. GRB 070125: Lick 3m Spectroscopy
  62. GRB070125: Swift-XRT Refined Analysis
  63. GRB 070125: SARA detection in R
  64. GRB 070125: P60 Optical Afterglow Candidate
  65. GRB 070126?: Swift detection of a possible burst
  66. GRB070125 redshift request
  67. IPN localization of GRB070124 (short duration, hard spectrum)
  68. GRB 070110: Ep,i - Eiso correlation
  69. GRB 070107: Suzaku WAM observation of the prompt emission
  70. GRB070110: Swift XRT Team refined analysis
  71. GRB 070110, Swift-BAT refined analysis
  72. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  73. GRB 070110: Swift detection of a burst with a possible optical afterglow
  74. GRB 070107: Possible UVOT Afterglow
  75. GRB 070107, Swift-BAT refined analysis
  76. GRB 070107: Swift detection of a burst
  77. VLA observation of GRB 061222B
  78. VLA detection of GRB 061222A
  79. GRB070103: APO SPIcam i' and z' limits
  80. GRB070103: KPNO 4m+FLAMINGOS J limit
  81. GRB 070103: Swift/UVOT Upper limits
  82. GRB070103: Swift XRT refined analysis
  83. GRB 070103, Swift-BAT refined analysis
  84. GRB 070103: NOT observations
  85. GRB 070103: TAROT Calern observatory optical observations
  86. Retractions of previous Swift-BAT triggers
  87. erratum : SDSS Pre-burst Observations of GRB061126
  88. GRB 061210: Swift/XRT Astrometry Correction
  89. GRB 050826: MDM Redshift
  90. GRB 061222A: Confirmation of Gemini Afterglow Candidate
  91. GRB 061222A: Xinglong Optical Limit
  92. GRB 061222A: Gemini Afterglow Candidate
  93. GRB 061222B, Swift-BAT refined analysis
  94. GRB061222A Swift/UVOT: Upper Limits
  95. GRB 061222B: Swift/UVOT Upper limits
  96. GRB 061222B: Observation with the KANATA 1.5m telescope
  97. GRB 061222A: Observation with the KANATA 1.5m telescope
  98. GRB 061222B: BOOTES-IR optical observations
  99. GRB 061222B: SARA upper limit
  100. GRB 061217: Magellan host galaxy redshift

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