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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"

38433 results found.

  1. IPN triangulation of GRB030505B (large error box)
  2. IPN triangulation of GRB030505A (annulus)
  3. GRB030329: RTT150 optical observations and upper limit for a host
  4. GRB 030329: all-sky CCD images by K. Shiokawa immediately after the burst
  5. GRB030501, optical observation
  6. GRB030501C triangulation (annulus)
  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. GRB030328, optical observation
  14. GRB 030329, BVRI photometry
  15. GRB 030501: TAROT possible candidate counterpart
  16. IPN triangulation of GRB030501 (IBIS event; annulus)
  17. IPN triangulation of GRB030501B (annulus)
  18. GRB 030429: confirmation of afterglow candidate
  19. GRB030429, possible optical counterpart
  20. GRB030501 localized by INTEGRAL
  21. GRB030425: CrAO optical observation
  22. IPN triangulation of GRB030429 (annulus)
  23. IPN triangulation of GRB030428 (two large error boxes)
  24. GRB 030329 Oprical observations in Rozhen observatory
  25. GRB 030429: ROTSE-III observations
  26. GRB 030324: Radio Observations
  27. GRB030329 observed as a sudden ionospheric disturbance (SID)
  28. IPN triangulation of GRB030426 (annulus)
  29. IPN triangulation of GRB030425 (single error box)
  30. GRB 030329, the review of the sky area in plate archive (1950-1998)
  31. GRB 030329: Spectral Evolution of SN 2003dh
  32. Optical Observations of GRB 030418 with Magellan
  33. GRB 030329: optical spectropolarimetry at VLT
  34. IPN triangulation of GRB030422C (annulus)
  35. IPN triangulation of GRB030422B (annulus)
  36. GRB 030329: wide-field photograph by R. Tamura 1 hr after the burst
  37. GRB030329: optical polarization
  38. IPN triangulation of GRB030422 (two large error boxes)
  39. GRB 030329 3.5 and 6 cm radio observations at RTF-32 telescope
  40. GRB030329, optical observation
  41. IPN triangulation of GRB030421 (annulus)
  42. GRB030329: 444 AAVSO Measurements
  43. IPN triangulation of GRB030419 (annulus)
  44. ROTSE-III prompt optical detections of GRB 030418
  45. GRB030418: Kiso near infrared observations
  46. GRB 030418: Optical afterglow candidate
  47. GRB030329: Optical Observations
  48. OT GRB 030329: early UBVRcIc spectral evolution
  49. GRB030329, UBVRI polarimetry, R-polarization
  50. GRB 030329: SARA Optical Observations
  51. OT GRB 030329: early spectrum
  52. GRB030329: VR Photometry at TNG
  53. GRB030324: Candidate Optical Afterglow (Erratum)
  54. GRB030324: Candidate Optical Afterglow
  55. IPN triangulation of GRB030414 (small error box)
  56. GRB 030413: Optical Observations
  57. IPN triangulation of GRB030413 (small error box)
  58. IPN triangulation of GRB030410 (annulus)
  59. GRB 030329 and SN 2003dh
  60. GRB030329, optical position
  61. GRB 030329 VLBA Observations
  62. IPN triangulation of GRB030406 (small error box)
  63. IPN triangulation of GRB050403 (small error box)
  64. IPN triangulation of GRB030403 (annulus)
  65. GRB 030329: BVRI photometry at Asiago
  66. GRB 030329, light curve flattens
  67. GRB 030329: VLT V-band photometry
  68. GRB 030329: Supernova Confirmed
  69. GRB030329: Near Infrared Observations at Gunma
  70. GRB030329: HET spectroscopic monitoring
  71. Kiso observation of the GRB030329 at April 6
  72. GRB 030329, color evolution
  73. GRB030328, UBVRcIc field photometry
  74. GRB030329: BV photographic observations
  75. GRB 030329 Optical observations
  76. GRB 030329, color evolution
  77. GRB030329: RTT150 optical observations
  78. GRB 030329: Supernova Spectrum Emerging
  79. GRB030329: Kiso B and R band observations
  80. GRB030329: More AAVSO VR obs
  81. GRB030328: R upper limit after 6 hours by MASTER
  82. GRB 030329: BV photographic observations
  83. GRB 030329: SARA Optical Observations
  84. GRB 030329: SARA Optical Observations
  85. GRB030329, fading resumes
  86. GRB 030329, BVRI photometry
  87. GRB030329: Optical observations
  88. SDSS 0.5m PT observations of GRB030329 (correction)
  89. SDSS 0.5m PT observations of GRB030329
  90. GRB030329, cessation of fading
  91. GRB030329: final R-band light curve by MASTER
  92. GRB 030329: Sub-millimeter detection
  93. GRB 030329: SARA Optical Observations
  94. GRB 030329: SARA Optical Observations
  95. GRB030329, optical observation
  96. GRB030329, optical observation
  97. GRB030329, new UBVRcIc field photometry
  98. GRB 030329, light curve and SN prediction
  99. GRB030329: optical observations at Tokyo Tech
  100. GRB 030329, BRI photometry

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