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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"

28233 results found.

  1. VLA observation of GRB 070306
  2. GRB 070306: NOT observations
  3. GRB 070306 Swift/UVOT refined analysis
  4. GRB 070306: IR observations and candidate afterglow
  5. GRB 070306, Swift-BAT refined analysis
  6. GRB 070306: XRT Team Refined Analysis
  7. GRB 070306: Optical and IR observations with KANATA
  8. GRB070306 - SDSS Pre-burst Observations
  9. GRB 070306: Swift detection of a burst
  10. GRB070227: Swift-XRT refined analysis
  11. GRB 060605 new redshift
  12. GRB 070125, deep late-time optical observation
  13. VLA observation of GRB 070224
  14. GRB 070227: Swift/UVOT Upper Limits
  15. GRB 070227: TAROT La Silla observatory optical observations
  16. GRB 070227, Swift-BAT refined analysis
  17. GRB 070227: Swift detection of a burst in ground analysis
  18. GRB 070224: Swift/UVOT Upper Limits
  19. VLA observation of GRB 070223
  20. VLA observation of GRB 070220
  21. GRB070224: Magellan Imaging Observations
  22. GRB 070224: WHT K-band imaging
  23. GRB 070224: MDM Observations
  24. GRB070224: Gemini Imaging Observations
  25. GRB 070224: SARA upper limit
  26. GRB070224: Swift-XRT Refined Analysis
  27. GRB 070224: optical afterglow candidate
  28. GRB 070224, Swift-BAT refined analysis
  29. GRB 070224: MASTER-Net refind analysis
  30. GRB 070224: MASTER-VWF-Kislovodsk observations
  31. GRB 070224: Swift detection of a burst
  32. GRB 070223: Optical observations
  33. GRB070223: Swift/UVOT refined analysis
  34. GRB 070223: Optical-IR observation with KANATA
  35. GRB 070223, Swift-BAT refined analysis
  36. GRB070223: MASTER-VWF-Kislovodsk observations
  37. GRB 070223: Swift-XRT Refined Analysis
  38. GRB070223 - SDSS Pre-Burst Observations
  39. GRB 070223: MDM Observations
  40. GRB070223: Swift burst
  41. GRB 070220: MITSuME Okayama Optical Observation
  42. GRB 070220 Swift-BAT Refined Analysis
  43. Swift/UVOT refined analysis of GRB070220
  44. GRB 070209: Swift XRT refined analysis
  45. GRB 070220: Swift-XRT Refined Analysis
  46. GRB 070220: Observation with the KANATA 1.5m telescope
  47. GRB 070219: Gemini Observations
  48. GRB 070220: Swift detection of a burst
  49. GRB070219: MASTER-VWF-Kislovodsk observations
  50. GRB 070219: Swift/UVOT Upper limits
  51. GRB 070219: I-band observations
  52. GRB 070219, Swift-BAT refined analysis
  53. GRB 070219: optical TNG observations
  54. GRB070219 - SDSS Pre-Burst Observations
  55. GRB 070219: Swift detection of a burst
  56. GRB 070125 observations with the GMRT
  57. GRB 070209: Redshift of a galaxy in the error circle of XRT source
  58. GRB 070129: MDM I-band Detection
  59. GRB 070125: Break in Optical Decay
  60. GRB 070209: Swift XRT analysis
  61. GRB 070201: clarification on localization and Konus-Wind spectra
  62. IPN localization of very bright long hard GRB 070207
  63. GRB 070209, Swift-BAT refined analysis of the short hard burst
  64. GRB 070208: Swift XRT refined analysis
  65. GRB 070208, Swift-BAT refined analysis
  66. GRB070208 - SDSS Pre-Burst Observations
  67. GRB 070208: Early IR detection and afterglow astrometry
  68. GRB 070208: Swift detection of a burst
  69. GRB 070125 detection with CARMA
  70. GRB 070125: Redshift z>~1.54 from Gemini Afterglow Spectrum
  71. GRB 070129: afterglow confirmation
  72. GRB070126: Swift-XRT Observation
  73. GRB 070129: Swift/UVOT Upper limits
  74. GRB 070125: optical observation
  75. GRB 070129, Swift-BAT refined analysis of a particularly long
  76. GRB 070129: Xinglong TNT optical Upper Limit
  77. GRB 070129: Swift-XRT Refined Analysis
  78. GRB 070129: VLT observations
  79. GRB 070125: An IR Point Source and an Apparent Host Galaxy
  80. GRB 070129: Swift detection of a burst
  81. GRB 070126: Swift/UVOT refined analysis
  82. GRB 070125: MITSuME Okayama optical observation
  83. GRB 070125: optical observations
  84. GRB 070126: VLT observations
  85. GRB 070124: Suzaku WAM observation of the prompt emissions
  86. GRB 070125: UVOT Detection in Ultraviolet Filters
  87. GRB 070126, Swift-BAT refined analysis of a very faint burst
  88. GRB070125: Optical observation by Kanata
  89. GRB070124: Swift-XRT Observation
  90. Possible GRB 070126: Swift/UVOT Upper Limit
  91. GRB 070125: UVOT Observations of a Fading Optical Afterglow
  92. GRB 070125: Xinglong TNT optical observations
  93. GRB 070125: Keck/LRIS Spectroscopy -- Evidence for a very low redshift
  94. GRB 070125: Lick 3m Spectroscopy
  95. GRB070125: Swift-XRT Refined Analysis
  96. GRB 070125: SARA detection in R
  97. GRB 070125: P60 Optical Afterglow Candidate
  98. GRB 070126?: Swift detection of a possible burst
  99. GRB070125 redshift request
  100. IPN localization of GRB070124 (short duration, hard spectrum)

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