ASTROSAT CZTI

Data Quality Report

Orbit 51975

Creation date: 2025-05-08T06:12:01.158644
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/AS1C09_011T06_9000006468_51975cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51975cztM0_level2_quad_clean.evt
Size (bytes)649,105,92089,280,000
Size619.0 MB 85.1 MB
Events in quadrant A6,021,106553,847
Events in quadrant B4,229,106671,779
Events in quadrant C8,296,025464,684
Events in quadrant D4,980,176561,083

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0225282
B0170742
C0291972
D0192582

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A647285713.241656%
B64731512.332767%
C6472189129.218171%
D64721892.920272%

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 7603 6474 650 650 8.55% 10.04%
B 7604 6475 70 70 0.92% 1.08%
C 7603 6474 1389 1389 18.27% 21.46%
D 7603 6474 148 148 1.95% 2.29%

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 8 249 1274672 8055.75 634 619 158.2
A 7 64 1199541 7580.7 634 619 158.2
A 8 62 310124 1956.98 634 619 158.2
B 8 128 290611 2049.78 678 655 141.5
B 10 254 167572 1179.98 678 655 141.5
B 4 171 153839 1082.9 678 655 141.5
C 15 224 4999748 30991.38 579 574 161.3
C 13 3 479061 2966.28 579 574 161.3
C 4 5 168735 1042.48 579 574 161.3
D 6 42 876958 4637.8 657 627 189.0
D 2 172 307448 1623.79 657 627 189.0
D 3 12 258868 1366.69 657 627 189.0

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