ASTROSAT CZTI

Data Quality Report

Orbit 58174

Creation date: 2026-06-30T18:34:02.043988
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_042T02_9000006586_58174cztM0_level2.fits modeM0/AS1A14_042T02_9000006586_58174cztM0_level2_quad_clean.evt
Size (bytes)763,001,28084,830,400
Size727.7 MB 80.9 MB
Events in quadrant A3,246,539662,516
Events in quadrant B13,810,921250,259
Events in quadrant C3,195,419629,912
Events in quadrant D7,457,049545,838

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142702
B0457068
C0145422
D0269292

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6879751.090275%
B6878487670.892701%
C6878650.945042%
D68796819.899695%

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 8644 6881 9 9 0.10% 0.13%
B 8643 6880 3911 3911 45.25% 56.85%
C 8643 6880 16 16 0.19% 0.23%
D 8644 6881 661 661 7.65% 9.61%

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 3 14 147924 774.89 770 749 189.9
A 11 3 64083 333.46 770 749 189.9
A 4 3 19592 99.21 770 749 189.9
B 10 128 11557326 103243.7 521 502 111.9
B 0 79 64210 569.14 521 502 111.9
B 10 247 35877 316.03 521 502 111.9
C 6 223 104770 511.66 749 743 203.3
C 11 244 30776 147.72 749 743 203.3
C 12 250 27278 130.51 749 743 203.3
D 12 110 3580262 17740.53 713 683 201.8
D 8 240 373244 1846.43 713 683 201.8
D 8 160 219891 1086.4 713 683 201.8

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