ASTROSAT CZTI

Data Quality Report

Orbit 55136

Creation date: 2025-12-07T01:39:12.513088
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_022T16_9000006532_55136cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55136cztM0_level2_quad_clean.evt
Size (bytes)465,788,16091,866,240
Size444.2 MB 87.6 MB
Events in quadrant A3,666,246606,839
Events in quadrant B3,692,510630,864
Events in quadrant C3,223,556587,926
Events in quadrant D6,144,469493,860

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01577222
B01587611
C01449811
D02304622

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66202203.323263%
B66253495.267925%
C6624620.935990%
D662189613.532699%

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 7500 6627 167 167 2.23% 2.52%
B 7501 6629 295 295 3.93% 4.45%
C 7501 6630 35 35 0.47% 0.53%
D 7499 6625 825 825 11.00% 12.45%

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 0 8 407603 2360.96 691 672 172.4
A 12 115 382436 2214.94 691 672 172.4
A 15 32 108734 626.96 691 672 172.4
B 2 249 782799 5407.99 668 642 144.6
B 4 21 107282 737.33 668 642 144.6
B 10 247 64761 443.33 668 642 144.6
C 6 223 148367 796.77 678 673 185.4
C 14 254 105435 565.16 678 673 185.4
C 9 38 81898 438.19 678 673 185.4
D 11 129 2918672 16189.3 636 610 180.2
D 8 245 248898 1377.49 636 610 180.2
D 11 176 109058 601.67 636 610 180.2

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