ASTROSAT CZTI

Data Quality Report

Orbit 20160221_T01_072T03_9000000340_level2

Creation date: 2025-10-27T21:04:22.724163
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/AS1T01_072T03_9000000340cztM0_level2.fits modeM0/AS1T01_072T03_9000000340cztM0_level2_quad_clean.evt
Size (bytes)1,074,510,7201,058,762,880
Size1.0 GB 1009.7 MB
Events in quadrant A6,617,1046,595,472
Events in quadrant B6,354,4366,407,668
Events in quadrant C5,529,9464,952,496
Events in quadrant D5,248,6905,337,922

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02878280
B03578980
C04453710
D03373180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A026420
B026420
C026420
D026420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12909515851.227778%
B12929860654.690714%
C1291772855822.107651%
D124311107888.678234%

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 146421 129091 0 0 0.00% 0.00%
B 146421 129271 0 0 0.00% 0.00%
C 146421 128173 0 0 0.00% 0.00%
D 146421 124283 0 0 0.00% 0.00%

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 14 188 6283 10.83 1717 1591 433.2
A 0 29 6231 10.71 1717 1591 433.2
A 7 110 5693 9.47 1717 1591 433.2
B 2 9 5542 12.49 1675 1584 317.0
B 10 225 4495 9.18 1675 1584 317.0
B 5 128 4452 9.05 1675 1584 317.0
C 4 226 4040 6.94 1473 1351 387.2
C 2 127 4028 6.91 1473 1351 387.2
C 1 81 3783 6.28 1473 1351 387.2
D 1 19 3903 6.65 1497 1360 382.3
D 6 231 3860 6.54 1497 1360 382.3
D 7 5 3830 6.46 1497 1360 382.3

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