ASTROSAT CZTI

Data Quality Report

Orbit 20250726_C09_011T06_9000006490_level2

Creation date: 2025-08-10T00:07:59.519268
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/AS1C09_011T06_9000006490cztM0_level2.fits modeM0/AS1C09_011T06_9000006490cztM0_level2_quad_clean.evt
Size (bytes)3,031,272,0001,508,060,160
Size2.8 GB 1.4 GB
Events in quadrant A19,320,5925,593,389
Events in quadrant B17,698,0925,642,527
Events in quadrant C16,006,6424,265,460
Events in quadrant D10,612,3542,177,916

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05230
B05230
C05230
D05230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A082800
B082800
C082780
D082800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011029410
B012785070
C018948150
D025132880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A408364230865.653290%
B4083685066812.407436%
C40834811756928.791374%
D40833122167654.288310%

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 464705 408111 0 0 0.00% 0.00%
B 464705 407393 0 0 0.00% 0.00%
C 464704 402469 0 0 0.00% 0.00%
D 464705 389157 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 22251 10.32 5108 4744 1696.9
A 9 255 20591 9.34 5108 4744 1696.9
A 14 204 17762 7.67 5108 4744 1696.9
B 2 9 20329 14.65 4698 4462 1083.3
B 2 8 18449 12.91 4698 4462 1083.3
B 9 173 14551 9.31 4698 4462 1083.3
C 15 175 13059 6.17 4288 3906 1484.2
C 7 221 12882 6.05 4288 3906 1484.2
C 2 31 12732 5.95 4288 3906 1484.2
D 6 218 14251 11.17 3043 2703 1034.2
D 15 11 10244 7.29 3043 2703 1034.2
D 8 12 9842 6.9 3043 2703 1034.2

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