ASTROSAT CZTI

Data Quality Report

Orbit 57827

Creation date: 2026-06-06T01:42:04.811522
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/AS1A14_083T16_9000006580_57827cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57827cztM0_level2_quad_clean.evt
Size (bytes)627,408,000109,872,000
Size598.3 MB 104.8 MB
Events in quadrant A3,845,980802,322
Events in quadrant B4,075,454816,206
Events in quadrant C9,300,928558,165
Events in quadrant D5,516,084713,024

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016050160
B016856179
C032480421
D021166265

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62693585.710640%
B62724316.871811%
C6258246139.325663%
D62625068.080485%

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 7359 6284 326 326 4.43% 5.19%
B 7369 6289 309 309 4.19% 4.91%
C 7349 6277 2011 2011 27.36% 32.04%
D 7369 6279 482 482 6.54% 7.68%

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 3 14 213069 715.16 900 874 296.7
A 3 128 51742 171.44 900 874 296.7
A 3 48 30537 99.97 900 874 296.7
B 2 249 357930 1737.99 823 806 205.5
B 4 158 92276 445.15 823 806 205.5
B 0 63 90981 438.85 823 806 205.5
C 9 38 5514000 20660.44 726 704 266.9
C 15 224 675506 2528.74 726 704 266.9
C 6 223 114806 427.58 726 704 266.9
D 12 110 1347646 4161.24 881 822 323.7
D 2 249 197031 606.22 881 822 323.7
D 8 160 154296 474.18 881 822 323.7

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