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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"

28172 results found.

  1. GRB000615: BeppoSAX NFI follow-up preliminary analysis
  2. GRB000615, R-band photometry
  3. The Hosts of GRB 980703 and GRB 971214
  4. GRB 000301C: Further Late-Time HST/STIS observations
  5. GRB000528: follow-up X-ray measurements and update of IPN annulus
  6. GRB980519, HST/STIS observations of the host galaxy
  7. GRB000604 optical non-detection
  8. GRB000604 - Optical observations
  9. GRB000604, optical observations
  10. GRB000528, optical observations at ESO
  11. GRB 000604 optical observations
  12. GRB 000418: Detection of the Host Galaxy
  13. GRB000604, optical observations, comparison with DPOSS
  14. GRB000528, Radio Observations
  15. X-ray Afterglow of GRB 000529
  16. GRB000529: BeppoSAX NFI follow-up preliminary analysis
  17. GRB000528: BeppoSAX NFI follow-up preliminary analysis
  18. GRB 000528 - WFC measurements
  19. GRB000519, BVRI field photometry
  20. IPN triangulation of GRB000519
  21. GRB000508B, optical photometry
  22. GRB000508B, BVR field photometry
  23. Possible GRB-related phenomenon
  24. RXTE/ASM and IPN localization of GRB 000508B
  25. GRB000424, UBVRI field photometry
  26. GRB000418, UBVRI field photometry update
  27. GRB000424, optical observations
  28. GRB 000429, optical observation
  29. GRB 000429, UBVRI field photometry
  30. GRB 000418, UBVRI field photometry
  31. GRB 000418, optical observation
  32. GRB 000418, Optical Observation
  33. GRB000418, near-infrared observations
  34. Correction to IPN error box for GRB000419
  35. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  36. GRB000416 BRJK observations
  37. RE: Budget cuts in BeppoSAX operations: impact on GRB observation
  38. GRB 000408, optical observations
  39. GRB 991208, UBVRI field photometry
  40. GRB000408, lotis optical observations
  41. GRB 000301C: Late-Time HST/STIS CCD Imaging of the field
  42. GRB000301C - Addendum to GCN 623
  43. GRB 000323, optical observations
  44. GRB 000326: Optical Observations
  45. GRB000326, Radio observations
  46. GRB000313, Radio observations
  47. GRB 000313 - optical transient in the BATSE error box
  48. GRB 000307, Optical Observations
  49. GRB 000307, BVRI Field Photometry
  50. GRB 000301C: A Precise Redshift Determination
  51. GRB 000301C, Optical Observation
  52. GRB 000301C: HST/STIS CCD Imaging of the field
  53. IPN error box for GRB000307
  54. GRB000301C, optical R-band observations
  55. GRB 000301C Optical Observations
  56. GRB 000301C: K' Observations
  57. GRB000301C OT candidate optical observations
  58. GRB000301C - Host galaxy not detected in R (?)
  59. Optical observations of GRB000301c
  60. GRB000301C, Radio observations
  61. GRB000301C, Radio observations
  62. GRB000301C, near-infrared observations (JHK' imaging)
  63. GRB 000301c near-IR observations
  64. GRB 000301C, UBVRI field photometry
  65. GRB 000301C: OT confirmed
  66. GRB000301c optical observations
  67. GRB000301C, optical observations
  68. GRB000301C
  69. GRB 000301C : Optical Candidate
  70. GRB000301C: RXTE/ASM and IPN localizations
  71. GRB000226 [IPN Position]
  72. HST Observations of GRB 990712
  73. GRB 000214 near-IR observations
  74. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  75. GRB000210, Radio Observations
  76. GRB 000115, BVRI field photometry
  77. GRB000214: BeppoSAX GRBM and WFC Detection
  78. Optical observations of GRB000210
  79. GRB000210 X-ray afterglow
  80. GRB000214: X-ray afterglow candidate
  81. GRB000214 refined BeppoSAX-WFC position
  82. GRB 000210: BATSE Observations
  83. Optical observations of the Chandra X-ray source for GRB000210
  84. GRB000210, Radio Observations
  85. IPN triangulation of GRB000210
  86. GRB000210: possible afterglow detection with BeppoSAX NFI
  87. GRB000201, Radio Observations
  88. GRB000210: BeppoSAX GRBM and WFC Detection
  89. SAX_WFC_GRB_NOTICE
  90. SAX_WFC_GRB_NOTICE
  91. GRB000201 Optical Observations
  92. GRB 000201: TAROT optical observations
  93. GRB 991208, radio observations
  94. BATSE+IPN location of GRB000131
  95. IPN localization of GRB000131
  96. GRB 000126, optical observations
  97. BATSE Observations of GRB000115
  98. Second RXTE Observation of GRB 000115
  99. GRB991216, UBVRIJHK field photometry
  100. GCN resumes full operations

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