ASTROSAT CZTI

Data Quality Report

Orbit 54171

Creation date: 2025-10-03T03:13:23.647278
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_012T01_9000006512_54171cztM0_level2.fits modeM0/AS1A14_012T01_9000006512_54171cztM0_level2_quad_clean.evt
Size (bytes)836,006,40092,911,680
Size797.3 MB 88.6 MB
Events in quadrant A5,172,016672,331
Events in quadrant B6,255,610692,335
Events in quadrant C4,814,679668,557
Events in quadrant D14,121,317257,001

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0209532
B0238452
C0194612
D0471472

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75126558.719382%
B751294412.566560%
C75123424.552716%
D7512464161.781150%

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 7692 7513 388 388 5.04% 5.16%
B 7692 7513 531 531 6.90% 7.07%
C 7692 7513 175 175 2.28% 2.33%
D 7692 7512 3774 3774 49.06% 50.24%

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 29 1180737 6213.62 774 755 189.9
A 15 174 566043 2976.73 774 755 189.9
A 0 8 122884 643.11 774 755 189.9
B 4 171 1914804 11764.76 760 731 162.7
B 15 20 766001 4703.7 760 731 162.7
B 5 172 176425 1079.89 760 731 162.7
C 9 38 655641 3075.15 781 771 213.0
C 10 171 539645 2530.46 781 771 213.0
C 15 177 235174 1100.71 781 771 213.0
D 8 176 10938073 88960.95 425 405 122.9
D 2 165 856926 6966.47 425 405 122.9
D 11 176 165110 1339.62 425 405 122.9

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