ASTROSAT CZTI

Data Quality Report

Orbit 57702

Creation date: 2026-05-28T16:30:41.131594
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_125T09_9000006578_57702cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57702cztM0_level2_quad_clean.evt
Size (bytes)603,624,96097,476,480
Size575.7 MB 93.0 MB
Events in quadrant A3,346,257687,601
Events in quadrant B6,187,064622,142
Events in quadrant C7,053,954557,401
Events in quadrant D5,186,176573,593

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153251
B0234551
C0262141
D0205971

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73373024.116124%
B7338144419.678386%
C7338142819.460343%
D733884911.569910%

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 7352 7338 2 2 0.03% 0.03%
B 7353 7339 836 836 11.37% 11.39%
C 7353 7338 887 887 12.06% 12.09%
D 7353 7339 470 470 6.39% 6.40%

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 3 128 119326 590.53 819 796 200.7
A 7 160 22156 106.42 819 796 200.7
A 4 3 15219 71.86 819 796 200.7
B 4 80 2411725 15554.94 729 702 155.0
B 5 185 328800 2116.75 729 702 155.0
B 0 171 150041 963.47 729 702 155.0
C 15 224 2056970 10632.99 710 702 193.4
C 12 254 1373396 7098.22 710 702 193.4
C 12 2 434070 2240.95 710 702 193.4
D 8 240 1171843 5406.14 770 735 216.6
D 2 249 335951 1547.44 770 735 216.6
D 3 12 130311 598.16 770 735 216.6

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