ASTROSAT CZTI

Data Quality Report

Orbit 56496

Creation date: 2026-03-08T13:48:51.088264
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_060T01_9000006556_56496cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56496cztM0_level2_quad_clean.evt
Size (bytes)701,115,840110,687,040
Size668.6 MB 105.6 MB
Events in quadrant A10,110,655566,511
Events in quadrant B5,403,662798,284
Events in quadrant C4,350,640741,174
Events in quadrant D5,447,822672,132

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0356651
B0217391
C0189111
D0217411

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8249244829.676324%
B82506507.878788%
C82502282.763636%
D82504305.212121%

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 8818 8248 1856 1856 21.05% 22.50%
B 8820 8250 220 220 2.49% 2.67%
C 8820 8251 40 40 0.45% 0.48%
D 8820 8250 152 152 1.72% 1.84%

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 12 3 3351718 16538.01 819 795 202.6
A 3 62 1893223 9339.81 819 795 202.6
A 7 64 626508 3088.12 819 795 202.6
B 4 206 1326313 6640.83 924 891 199.6
B 0 213 116967 581.58 924 891 199.6
B 4 171 96369 478.38 924 891 199.6
C 12 252 212877 834.4 932 925 254.0
C 13 3 186433 730.3 932 925 254.0
C 6 223 140010 547.54 932 925 254.0
D 2 249 545135 2129.02 914 876 255.6
D 11 176 396675 1548.28 914 876 255.6
D 8 160 318256 1241.52 914 876 255.6

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