ASTROSAT CZTI

Data Quality Report

Orbit 51497

Creation date: 2025-04-06T01:21:44.700250
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_9000006458_51497cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51497cztM0_level2_quad_clean.evt
Size (bytes)641,286,72092,424,960
Size611.6 MB 88.1 MB
Events in quadrant A5,550,505624,276
Events in quadrant B3,955,166683,771
Events in quadrant C3,934,798613,690
Events in quadrant D9,774,290405,660

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210102
B0160832
C0163442
D0337399

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67544486.633106%
B67552784.115470%
C67552043.019985%
D6754239035.386438%

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 8667 6754 273 273 3.15% 4.04%
B 8668 6755 38 38 0.44% 0.56%
C 8668 6755 110 110 1.27% 1.63%
D 8667 6754 2269 2269 26.18% 33.59%

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 12 3 729363 4027.73 742 725 180.9
A 8 43 597318 3297.82 742 725 180.9
A 12 250 238538 1314.57 742 725 180.9
B 4 81 224731 1406.06 740 714 159.3
B 10 254 155823 973.55 740 714 159.3
B 15 52 118057 736.51 740 714 159.3
C 12 247 286120 1430.92 729 723 199.4
C 3 233 141405 705.35 729 723 199.4
C 13 3 136403 680.27 729 723 199.4
D 8 176 3370386 19475.12 620 599 173.0
D 11 176 2951283 17052.99 620 599 173.0
D 2 216 642638 3710.56 620 599 173.0

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