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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"

26560 results found.

  1. VLA observation of GRB 070220
  2. GRB070224: Magellan Imaging Observations
  3. GRB 070224: WHT K-band imaging
  4. GRB 070224: MDM Observations
  5. GRB070224: Gemini Imaging Observations
  6. GRB 070224: SARA upper limit
  7. GRB070224: Swift-XRT Refined Analysis
  8. GRB 070224: optical afterglow candidate
  9. GRB 070224: MASTER-Net refind analysis
  10. GRB 070224: MASTER-VWF-Kislovodsk observations
  11. GRB 070224: Swift detection of a burst
  12. GRB 070223: Optical observations
  13. RHESSI Spectrum of GRB070220
  14. GRB070223: Swift/UVOT refined analysis
  15. GRB 070223: Optical-IR observation with KANATA
  16. GRB 070223, Swift-BAT refined analysis
  17. GRB070223: MASTER-VWF-Kislovodsk observations
  18. GRB 070223: Swift-XRT Refined Analysis
  19. GRB070223 - SDSS Pre-Burst Observations
  20. GRB 070223: Liverpool Telescope Possible Afterglow Candidate
  21. GRB070223: Swift burst
  22. Konus-Wind and Konus-A observations of GRB 070220
  23. GRB 070220: MITSuME Okayama Optical Observation
  24. Swift/UVOT refined analysis of GRB070220
  25. GRB 070209: Swift XRT refined analysis
  26. GRB 070220: Swift-XRT Refined Analysis
  27. GRB 070220: Observation with the KANATA 1.5m telescope
  28. GRB 070219: Gemini Observations
  29. GRB 070220 : Faulkes Telescope North optical limit
  30. GRB 070220: Swift detection of a burst
  31. GRB070219: MASTER-VWF-Kislovodsk observations
  32. GRB 070219: XRT Refined Analysis
  33. GRB 070219: Swift/UVOT Upper limits
  34. GRB 070219: I-band observations
  35. GRB 070219: optical TNG observations
  36. GRB 070219: Liverpool Telescope Observations
  37. GRB070219 - SDSS Pre-Burst Observations
  38. GRB 070125 observations with the GMRT
  39. GRB 070129: MDM I-band Detection
  40. GRB 070125: Break in Optical Decay
  41. GRB 070209: Swift XRT analysis
  42. GRB 070201: clarification on localization and Konus-Wind spectra
  43. IPN localization of very bright long hard GRB 070207
  44. GRB 070208: Swift XRT refined analysis
  45. GRB 070208, Swift-BAT refined analysis
  46. GRB070208 - SDSS Pre-Burst Observations
  47. GRB070208: Faulkes Telescope North Afterglow Identification
  48. GRB 070208: Swift detection of a burst
  49. GRB 070125 detection with CARMA
  50. GRB 070129: afterglow confirmation
  51. GRB070126: Swift-XRT Observation
  52. GRB 070129: Swift/UVOT Upper limits
  53. GRB 070129: dust-scattered X-ray halo detected by Swift/XRT
  54. GRB 070125: optical observation
  55. GRB061217: MAGIC telescope GeV observation
  56. GRB 070129: Xinglong TNT optical Upper Limit
  57. GRB 070129: Swift-XRT Refined Analysis
  58. GRB 070129: VLT observations
  59. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  60. GRB 070129: Swift detection of a burst
  61. GRB 070126: Swift/UVOT refined analysis
  62. GRB 070125: MITSuME Okayama optical observation
  63. GRB 070125: optical observations
  64. GRB 070126: VLT observations
  65. GRB 070124: Suzaku WAM observation of the prompt emissions
  66. GRB070125: Optical observation by Kanata
  67. GRB070124: Swift-XRT Observation
  68. Possible GRB 070126: Swift/UVOT Upper Limit
  69. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  70. GRB 070125: Xinglong TNT optical observations
  71. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  72. GRB 070125: Lick 3m Spectroscopy
  73. GRB070125: Swift-XRT Refined Analysis
  74. GRB 070125: SARA detection in R
  75. GRB 070125: P60 Optical Afterglow Candidate
  76. GRB 070126?: Swift detection of a possible burst
  77. GRB070125 redshift request
  78. RHESSI Spectrum of GRB070125
  79. Konus-Wind observation of short hard GRB 070124
  80. IPN localization of GRB070124 (short duration, hard spectrum)
  81. GRB 070110: Continued Detection and Request for Ground Followup
  82. GRB 070110: Ep,i - Eiso correlation
  83. GRB 070110 declared a "Burst of Interest" by Swift team
  84. GRB070110: Swift XRT Team refined analysis
  85. GRB070107 Swift/UVOT Observations of a Fading Optical Afterglow
  86. GRB 070110: Swift detection of a burst with a possible optical afterglow
  87. GRB070107: Swift/XRT refined analysis
  88. GRB 070107, Swift-BAT refined analysis
  89. GRB 070107: Swift detection of a burst
  90. VLA observation of GRB 061222B
  91. VLA detection of GRB 061222A
  92. GRB070103: APO SPIcam i' and z' limits
  93. GRB 070103: Swift/UVOT Upper limits
  94. GRB070103: Swift XRT refined analysis
  95. GRB 070103: NOT observations
  96. GRB 070103: TAROT Calern observatory optical observations
  97. erratum : SDSS Pre-burst Observations of GRB061126
  98. Konus-Wind observation of GRB 061222A
  99. GRB 061210: Swift/XRT Astrometry Correction
  100. GRB 050826: MDM Redshift

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