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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"

28235 results found.

  1. GRB990123 Optical Observations
  2. GRB990123, Probability of gravitational lensing
  3. GRB 990123: Detection of the IR Transient, and the Light Curve Fits
  4. GRB990123, Preliminary Lens Search Results
  5. On the Lensing Interpretation of GRB 990123
  6. Search for Potential Images of GRB 990123
  7. Search for Potential Images of GRB 990123
  8. GRB990123, Optical BVRI Observations
  9. GRB 990123: near-infrared observations.
  10. GRB990123, OSSE observations
  11. GRB990123: NIR Observation
  12. GRB990123, ASCA X-ray observation of afterglow
  13. "GRB 990123: New BV Observations"
  14. GRB 990123 Optical Follow-Up
  15. GRB 990123: BATSE Observations
  16. GRB990123 Optical Observations
  17. GRB 990123: New Optical Observations, Decay Measure
  18. GRB 990123 Optical Follow-Up
  19. GRB 990123: Possible Gravitationally Lensed Burst?
  20. GRB990123, optical observation
  21. GRB 990123: Pre-Burst Detection of an Apparent Host Galaxy
  22. GRB990123, Optical observation
  23. GRB 990123: Optical Decay Slope
  24. GRB 990123 r-band photometry
  25. GRB 990123 Optical Follow-up
  26. GRB990123, early optical counterpart detection
  27. GRB990123 Optical Observation
  28. Possible identification of SN1999E with GRB980910
  29. Optical Observations of GRB 981220
  30. GRB 981226: radio variable
  31. GRB981220
  32. GRB981220, Correction to GCN 179
  33. GRB 981220 Optical observations
  34. GRB 981226 Optical Observations
  35. GRB 981220 and GRB 981226, optical observations
  36. GRB981226 Optical Observations
  37. GRB981226 BeppoSAX follow up
  38. GRB 981226
  39. GRB 981226 optical observations
  40. GRB981220 B, R and I band observations
  41. Optical Observations of GRB981226
  42. GRB 981220:Optical Observations
  43. GRB 981226 optical observations
  44. GRB 981220
  45. GRB 981220, radio observations
  46. GRB981220 I-band Observations
  47. GRB 981220
  48. GRB 980326/Host Galaxy
  49. GRB 981220: RXTE/ASM and BeppoSAX/GRBM results
  50. BeppoSAX NFI Observation of GRB980425
  51. GRB980329 R,I flux calibration and R,I,K upper limits
  52. GRB980425 Optical Follow-up
  53. GRB 980923 BATSE Observations
  54. SGR1900+14, BeppoSAX-GRBM observations
  55. GRB970508 optical observations
  56. GRB971214, association with a Galactic star?
  57. GRB980519, Optical Observations
  58. GRB980703 - BeppoSAX/GRBM detection
  59. GRB980703 optical photometry
  60. GRB 980703: BATSE Observations
  61. GRB980703 optical observations
  62. GRB980703: Radio transient
  63. GRB 980703: Spectrum of the proposed optical counterpart
  64. GRB980703 Transient Optical Follow-Up
  65. GRB980703: LOTIS observation at early times
  66. GRB980613 Optical Observations
  67. GRB980703 (I band observations)
  68. BeppoSAX NFI observations of GRB 980703
  69. GRB980519 observation report
  70. GRB980703 optical followup
  71. Radio observations of SGRs
  72. SGR1900+14 field optical observations
  73. GRB980613, optical observations
  74. GRB 980613: Optical transient and its host galaxy
  75. SGR1627-41, RXTE/ASM observations
  76. GRB 980613: Detection of the probable host galaxy
  77. Reduced error box of SGR 1627-41
  78. GRB 980613: BATSE Observations
  79. GRB 980613 Optical Observations
  80. GRB 980613 optical observations
  81. Discovery of a new SGR source, SGR1627-41
  82. GRB980613 Optical Observations
  83. GRB980613 observations from Palomar
  84. GRB 980613 optical/IR obs.
  85. GRB980613 Near Infra-Red Observations
  86. GRB971214 Secondary Standards
  87. GRB980519 Secondary Standards
  88. BATSE on-board GRB trigger change
  89. GRB 980519 Optical Observations
  90. GRB 980519
  91. GRB980519 optical observations
  92. GRB 980519 Optical Observations
  93. GRB980519 BATSE Observations
  94. GRB980519 Optical Observations
  95. GRB980519 Optical Observations
  96. GRB 980519 Optical Observations
  97. GRB980515, BeppoSAX IAUC to be submitted
  98. BSAX Observations of GRB980425 field
  99. IPN web site of GRBs
  100. GRB980425 BATSE observations

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