ASTROSAT CZTI

Data Quality Report

Orbit 39421

Creation date: 2024-06-27T22:04:22.422227
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A12_077T06_9000005474_39421cztM0_level2.fits modeM0/AS1A12_077T06_9000005474_39421cztM0_level2_quad_clean.evt
Size (bytes)647,530,56073,984,320
Size617.5 MB 70.6 MB
Events in quadrant A4,413,311583,086
Events in quadrant B2,620,367603,617
Events in quadrant C4,251,302549,567
Events in quadrant D12,272,145131,205

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169023
B0114352
C0159942
D0401052

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A53111512.843156%
B5311621.167388%
C53113386.364150%
D5311423279.683675%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7044 5312 87 87 1.24% 1.64%
B 7044 5312 45 45 0.64% 0.85%
C 7044 5312 325 325 4.61% 6.12%
D 7044 5312 3530 3530 50.11% 66.45%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 222 1535294 12918.84 588 575 118.8
A 10 83 453629 3813.68 588 575 118.8
A 13 248 103263 864.4 588 575 118.8
B 4 170 164736 1441.46 584 568 113.9
B 5 172 61422 534.32 584 568 113.9
B 5 255 46975 407.47 584 568 113.9
C 15 208 1694462 12952.3 560 563 130.8
C 15 214 218589 1667.12 560 563 130.8
C 9 187 118683 903.2 560 563 130.8
D 12 235 8935923 117349.56 307 298 76.1
D 12 0 1738194 22823.4 307 298 76.1
D 13 249 261159 3425.83 307 298 76.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter