ASTROSAT CZTI

Data Quality Report

Orbit 51581

Creation date: 2025-04-11T19:22:11.045499
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/AS1A13_037T05_9000006460_51581cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51581cztM0_level2_quad_clean.evt
Size (bytes)3,992,368,320504,241,920
Size3.7 GB 480.9 MB
Events in quadrant A45,093,3113,209,408
Events in quadrant B20,292,6454,050,024
Events in quadrant C44,862,4802,095,511
Events in quadrant D34,474,7843,188,163

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490
B0490
C0490
D0490

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016168011
B0879767
C01610599
D01296937

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08040
B08040
C08040
D08040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A39644712017.959843%
B396467531.899309%
C396451737243.818893%
D3964532378.164964%

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 44510 39652 4863 4863 10.93% 12.26%
B 44511 39653 148 148 0.33% 0.37%
C 44509 39643 5433 5433 12.21% 13.70%
D 44510 39652 2963 2963 6.66% 7.47%

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 7 64 11063101 11223.29 4015 3912 985.4
A 12 3 7800559 7912.34 4015 3912 985.4
A 12 250 3636782 3686.78 4015 3912 985.4
B 0 171 422400 461.59 4264 4108 906.2
B 10 247 313590 341.51 4264 4108 906.2
B 7 252 313328 341.23 4264 4108 906.2
C 15 198 25778556 32972.34 2808 2785 781.7
C 13 3 1714353 2189.44 2808 2785 781.7
C 9 38 1646193 2102.25 2808 2785 781.7
D 8 176 6983176 6183.48 4074 3929 1128.7
D 3 12 1928495 1705.13 4074 3929 1128.7
D 12 6 1819601 1608.65 4074 3929 1128.7

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