ASTROSAT CZTI

Data Quality Report

Orbit 51751

Creation date: 2025-04-23T05:12:47.156805
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_090T01_9000006464_51751cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51751cztM0_level2_quad_clean.evt
Size (bytes)939,637,440131,892,480
Size896.1 MB 125.8 MB
Events in quadrant A6,190,135891,988
Events in quadrant B10,239,647854,959
Events in quadrant C6,418,352856,491
Events in quadrant D11,172,495707,196

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02000
B02000
C02000
D02000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250412
B0372232
C0258732
D0400224

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A98474124.184015%
B9848183618.643379%
C98484574.640536%
D9847182218.503097%

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 11179 9850 281 281 2.51% 2.85%
B 11180 9851 1281 1281 11.46% 13.00%
C 11180 9851 301 301 2.69% 3.06%
D 11179 9850 1624 1624 14.53% 16.49%

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 8 62 396129 1528.52 1042 1015 258.5
A 4 175 314768 1213.77 1042 1015 258.5
A 15 174 261632 1008.21 1042 1015 258.5
B 4 206 4944527 23373.67 980 944 211.5
B 8 128 841491 3974.18 980 944 211.5
B 0 213 136217 639.58 980 944 211.5
C 13 3 905656 3269.61 1010 1002 276.7
C 15 224 205381 738.67 1010 1002 276.7
C 15 230 173240 622.5 1010 1002 276.7
D 11 129 6220679 23507.42 950 914 264.6
D 8 176 350620 1321.7 950 914 264.6
D 7 125 218649 822.92 950 914 264.6

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