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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"

28191 results found.

  1. GRB000630, Radio Observations
  2. possible optical counterpart of GRB 000630
  3. GRB 000620, optical observations
  4. GRB000418, HST/STIS Observations
  5. GRB990123: Late-time HST/STIS observations of the host
  6. GRB000620, optical observations
  7. GRB000615: H-band observations
  8. GRB990308, HST/STIS observations of the host galaxy
  9. GRB000620 - Optical observations
  10. GRB000620 Optical observations
  11. GRB000620: BeppoSAX WFC and GRBM detection
  12. GRB000607, optical observations
  13. GRB 000615: NIR further observations
  14. GRB990123, HST/STIS observations of the host galaxy
  15. GRB000616 optical observations
  16. GRB 000615, near-infrared observations
  17. GRB 990123: Late-time HST/STIS 50CCD observations of the host
  18. GRB000615, further R-band photometry
  19. GRB 000615: NIR observations
  20. GRB000615: BeppoSAX NFI follow-up preliminary analysis
  21. GRB000615, R-band photometry
  22. The Hosts of GRB 980703 and GRB 971214
  23. GRB 000301C: Further Late-Time HST/STIS observations
  24. GRB000528: follow-up X-ray measurements and update of IPN annulus
  25. GRB980519, HST/STIS observations of the host galaxy
  26. GRB000604 optical non-detection
  27. GRB000604 - Optical observations
  28. GRB000604, optical observations
  29. GRB000528, optical observations at ESO
  30. GRB 000604 optical observations
  31. GRB 000418: Detection of the Host Galaxy
  32. GRB000604, optical observations, comparison with DPOSS
  33. GRB000528, Radio Observations
  34. X-ray Afterglow of GRB 000529
  35. GRB000529: BeppoSAX NFI follow-up preliminary analysis
  36. GRB000528: BeppoSAX NFI follow-up preliminary analysis
  37. GRB 000528 - WFC measurements
  38. GRB000519, BVRI field photometry
  39. IPN triangulation of GRB000519
  40. GRB000508B, optical photometry
  41. GRB000508B, BVR field photometry
  42. Possible GRB-related phenomenon
  43. RXTE/ASM and IPN localization of GRB 000508B
  44. GRB000424, UBVRI field photometry
  45. GRB000418, UBVRI field photometry update
  46. GRB000424, optical observations
  47. GRB 000429, optical observation
  48. GRB 000429, UBVRI field photometry
  49. GRB 000418, UBVRI field photometry
  50. GRB 000418, optical observation
  51. GRB 000418, Optical Observation
  52. GRB000418, near-infrared observations
  53. Correction to IPN error box for GRB000419
  54. BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134
  55. GRB000416 BRJK observations
  56. RE: Budget cuts in BeppoSAX operations: impact on GRB observation
  57. GRB 000408, optical observations
  58. GRB 991208, UBVRI field photometry
  59. GRB000408, lotis optical observations
  60. GRB 000301C: Late-Time HST/STIS CCD Imaging of the field
  61. GRB000301C - Addendum to GCN 623
  62. GRB 000323, optical observations
  63. GRB 000326: Optical Observations
  64. GRB000326, Radio observations
  65. GRB000313, Radio observations
  66. GRB 000313 - optical transient in the BATSE error box
  67. GRB 000307, Optical Observations
  68. GRB 000307, BVRI Field Photometry
  69. GRB 000301C: A Precise Redshift Determination
  70. GRB 000301C, Optical Observation
  71. GRB 000301C: HST/STIS CCD Imaging of the field
  72. IPN error box for GRB000307
  73. GRB000301C, optical R-band observations
  74. GRB 000301C Optical Observations
  75. GRB 000301C: K' Observations
  76. GRB000301C OT candidate optical observations
  77. GRB000301C - Host galaxy not detected in R (?)
  78. Optical observations of GRB000301c
  79. GRB000301C, Radio observations
  80. GRB000301C, Radio observations
  81. GRB000301C, near-infrared observations (JHK' imaging)
  82. GRB 000301c near-IR observations
  83. GRB 000301C, UBVRI field photometry
  84. GRB 000301C: OT confirmed
  85. GRB000301c optical observations
  86. GRB000301C, optical observations
  87. GRB000301C
  88. GRB 000301C : Optical Candidate
  89. GRB000301C: RXTE/ASM and IPN localizations
  90. GRB000226 [IPN Position]
  91. HST Observations of GRB 990712
  92. GRB 000214 near-IR observations
  93. GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation
  94. GRB000210, Radio Observations
  95. GRB 000115, BVRI field photometry
  96. GRB000214: BeppoSAX GRBM and WFC Detection
  97. Optical observations of GRB000210
  98. GRB000210 X-ray afterglow
  99. GRB000214: X-ray afterglow candidate
  100. GRB000214 refined BeppoSAX-WFC position

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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