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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"

32713 results found.

  1. GRB030418 (=H2686): A Long, X-Ray-Rich GRB Localized by the HETE WXM
  2. XRF030416 (=U10897): An X-Ray Flash Localized by the HETE WXM
  3. GRB030429: RTT150 optical observations, a possible host galaxy
  4. GRB030329: RTT150 optical observations and upper limit for a host
  5. GRB030501, optical observation
  6. GRB030501 observation report
  7. GRB030501 triangulation (correction to GCN 2194)
  8. GRB030329: RTT150 optical observations and upper limit for a host
  9. GRB 030429: Radio Observations
  10. GRB 030429: redshift from VLT spectroscopy
  11. GRB 030429: IR photometry with IRSF/SIRIUS
  12. GRB030501B triangulation (single error box)
  13. GRB 030329 Optical Observations
  14. GRB030328, optical observation
  15. GRB 030329, BVRI photometry
  16. GRB030429: Optical Observations
  17. GRB030501: TAROT candidate afterglow present in archival images
  18. GRB 030501: TAROT possible candidate counterpart
  19. IPN triangulation of GRB030501 (IBIS event; annulus)
  20. GRB 030429: confirmation of afterglow candidate
  21. GRB030425: CrAO optical observation
  22. GRB 030329 Oprical observations in Rozhen observatory
  23. GRB 030324: Radio Observations
  24. GRB030329 observed as a sudden ionospheric disturbance (SID)
  25. GRB030329, SPM optical observations
  26. GRB 030329, the review of the sky area in plate archive (1950-1998)
  27. GRB 030329: Spectral Evolution of SN 2003dh
  28. GRB 030329: optical spectropolarimetry at VLT
  29. GRB030329: optical polarization
  30. GRB030329, optical observation
  31. GRB030329: 444 AAVSO Measurements
  32. ROTSE-III prompt optical detections of GRB 030418
  33. GRB030418: Upper limits from recent and historical observations.
  34. GRB 030418: Optical afterglow
  35. GRB 030418: Finder for afterglow candidate
  36. GRB 030329 OT position
  37. GRB030329: Optical Observations
  38. OT GRB 030329: early UBVRcIc spectral evolution
  39. GRB030329, UBVRI polarimetry, R-polarization
  40. GRB 030329: SARA Optical Observations
  41. OT GRB 030329: early spectrum
  42. GRB030329: VR Photometry at TNG
  43. GRB030324: Candidate Optical Afterglow
  44. GRB 030413: Optical Observations
  45. GRB 030329 Rc observations
  46. Superluminal motion in GRB 030329 (Correction)
  47. Superluminal motion in GRB 030329
  48. GRB 030329 and SN 2003dh
  49. GRB030329, optical position
  50. GRB 030329 VLBA Observations
  51. GRB 030329: BVRI photometry at Asiago
  52. GRB 030329, light curve flattens
  53. GRB 030329: VLT V-band photometry
  54. If the SN/GRB connection confirmed
  55. GRB 030329: Supernova Confirmed
  56. GRB030329: RTT150 optical observations
  57. GRB030329: Near Infrared Observations at Gunma
  58. GRB030329: HET spectroscopic monitoring
  59. GRB 030329, color evolution
  60. GRB030328, UBVRcIc field photometry
  61. GRB030329: Optical observcations
  62. GRB030329: BV photographic observations
  63. GRB 030329 Optical observations
  64. GRB 030329, color evolution
  65. GRB 030329: possible color change
  66. GRB030329: RTT150 optical observations
  67. GRB 030329: Supernova Spectrum Emerging
  68. GRB030329: RTT150 optical observation
  69. GRB030329: More AAVSO VR obs
  70. GRB030328: R upper limit after 6 hours by MASTER
  71. GRB 030329: BV photographic observations
  72. GRB 030329: SARA Optical Observations
  73. GRB 030329: SARA Optical Observations
  74. GRB030329, fading resumes
  75. GRB 030329, BVRI photometry
  76. GRB030329: Optical observations
  77. SDSS 0.5m PT observations of GRB030329 (correction)
  78. SDSS 0.5m PT observations of GRB030329
  79. GRB 030329, Optical observations
  80. GRB 030329, nearby galaxies
  81. GRB030329, cessation of fading
  82. GRB030329: final R-band light curve by MASTER
  83. GRB030329 Radio 23/43/90 GHz observations at Nobeyama
  84. GRB 030329: Sub-millimeter detection
  85. GRB 030329: SARA Optical Observations
  86. GRB 030329: SARA Optical Observations
  87. OT GRB light curves and SN predictions
  88. GRB030329, optical observation
  89. GRB030329, optical observation
  90. GRB030329, new UBVRcIc field photometry
  91. GRB 030329, light curve and SN prediction
  92. GRB030329: optical observations at Tokyo Tech
  93. GRB 030329: optical observations
  94. GRB030329: multiple re-brightening phases
  95. GRB 030329, BRI photometry
  96. GRB030329: Optical observations at Teramo
  97. GRB030329: more 15GHz observations
  98. Further AAVSO V,B,R observations of GRB030329
  99. GRB 030329: Additional Mt. Laguna Optical Observations
  100. GRB 030329: SARA Optical Observations

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