ASTROSAT CZTI

Data Quality Report

Orbit 58671

Creation date: 2026-08-02T12:36:17.369143
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_004T06_9000006594_58671cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58671cztM0_level2_quad_clean.evt
Size (bytes)553,832,64096,802,560
Size528.2 MB 92.3 MB
Events in quadrant A3,447,569668,920
Events in quadrant B3,736,615705,319
Events in quadrant C3,317,878641,623
Events in quadrant D9,493,518461,315

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0149131
B0155532
C0143311
D0327209

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65101552.380952%
B65101932.964670%
C65101141.751152%
D6509198330.465509%

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 7599 6509 46 46 0.61% 0.71%
B 7599 6509 44 44 0.58% 0.68%
C 7599 6510 39 39 0.51% 0.60%
D 7599 6510 2030 2030 26.71% 31.18%

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 12 114 164721 884.1 749 728 185.5
A 10 17 149358 801.28 749 728 185.5
A 4 249 66558 354.89 749 728 185.5
B 8 234 310198 1999.98 729 703 154.7
B 5 185 236607 1524.43 729 703 154.7
B 0 171 78464 502.5 729 703 154.7
C 12 254 171073 848.98 728 719 200.7
C 12 249 89569 442.79 728 719 200.7
C 14 254 85242 421.23 728 719 200.7
D 2 249 4492338 24134.0 652 622 186.1
D 8 240 1573530 8451.24 652 622 186.1
D 8 160 553204 2969.02 652 622 186.1

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