ASTROSAT CZTI

Data Quality Report

Orbit 58256

Creation date: 2026-07-04T23:12:25.551425
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_044T03_9000006588_58256cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58256cztM0_level2_quad_clean.evt
Size (bytes)791,274,24089,354,880
Size754.6 MB 85.2 MB
Events in quadrant A3,306,142693,840
Events in quadrant B12,583,600312,987
Events in quadrant C3,265,603653,894
Events in quadrant D9,573,720540,372

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01482
B01484
C01482
D01482

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015751261
B0436631286
C015676245
D034453947

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7279450.618217%
B7193436260.642291%
C7274300.412428%
D7205117616.321999%

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 7379 7327 19 19 0.26% 0.26%
B 7358 7282 3032 3032 41.21% 41.64%
C 7374 7325 26 26 0.35% 0.35%
D 7384 7285 1219 1219 16.51% 16.73%

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 4 238 148213 756.81 772 751 194.8
A 10 251 42939 216.52 772 751 194.8
A 7 64 35391 177.78 772 751 194.8
B 6 255 5555600 53914.12 472 453 103.0
B 4 206 3578031 34721.31 472 453 103.0
B 3 238 577042 5595.94 472 453 103.0
C 6 223 76561 365.94 748 741 207.2
C 8 208 52426 249.45 748 741 207.2
C 7 2 40224 190.56 748 741 207.2
D 12 110 4727971 23077.67 710 678 204.8
D 2 120 805898 3930.92 710 678 204.8
D 12 128 283703 1381.67 710 678 204.8

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