ASTROSAT CZTI

Data Quality Report

Orbit 20200618_A09_008T05_9000003724_level2

Creation date: 2025-12-12T21:26:05.139834
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/AS1A09_008T05_9000003724cztM0_level2.fits modeM0/AS1A09_008T05_9000003724cztM0_level2_quad_clean.evt
Size (bytes)859,348,800644,486,400
Size819.5 MB 614.6 MB
Events in quadrant A5,394,7923,663,155
Events in quadrant B5,176,4723,643,155
Events in quadrant C5,120,7223,338,164
Events in quadrant D4,459,7302,998,160

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01827230
B01784180
C01897850
D02273880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017420
B017420
C017420
D017420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01430
B01430
C01430
D01430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8567910161.185821%
B8567910971.280360%
C8567926553.098776%
D8567831553.682392%

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 99720 85679 0 0 0.00% 0.00%
B 99720 85680 0 0 0.00% 0.00%
C 99720 85679 0 0 0.00% 0.00%
D 99720 85105 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 0 29 5281 11.47 1405 1319 345.6
A 7 110 4283 8.58 1405 1319 345.6
A 0 30 4086 8.01 1405 1319 345.6
B 2 9 4124 10.41 1366 1302 271.2
B 5 128 3452 7.93 1366 1302 271.2
B 2 8 3425 7.83 1366 1302 271.2
C 1 81 3951 7.76 1352 1263 346.3
C 1 80 3931 7.7 1352 1263 346.3
C 12 241 3532 6.55 1352 1263 346.3
D 3 14 3218 6.0 1271 1155 343.9
D 7 3 3151 5.8 1271 1155 343.9
D 6 231 3130 5.74 1271 1155 343.9

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