ASTROSAT CZTI

Data Quality Report

Orbit 51554

Creation date: 2025-04-09T21:35:42.831481
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_037T05_9000006460_51554cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51554cztM0_level2_quad_clean.evt
Size (bytes)670,639,68092,505,600
Size639.6 MB 88.2 MB
Events in quadrant A10,037,691442,527
Events in quadrant B6,463,082660,322
Events in quadrant C3,596,493641,686
Events in quadrant D4,203,185584,679

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0345362
B0238452
C0155453
D0171532

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6766243035.914868%
B676683912.400236%
C67651412.084257%
D67653224.759793%

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 7840 6765 2197 2197 28.02% 32.48%
B 7841 6766 554 554 7.07% 8.19%
C 7840 6765 75 75 0.96% 1.11%
D 7840 6765 237 237 3.02% 3.50%

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 15 32 3970044 26217.86 621 606 151.4
A 12 250 1363171 8999.65 621 606 151.4
A 12 3 1145680 7563.13 621 606 151.4
B 10 44 2609676 16869.19 731 705 154.7
B 4 81 353129 2278.72 731 705 154.7
B 0 171 148193 953.63 731 705 154.7
C 14 245 306816 1510.76 743 740 202.6
C 13 3 193504 951.46 743 740 202.6
C 10 19 45389 220.38 743 740 202.6
D 12 6 484895 2393.54 728 702 202.3
D 6 42 185459 913.32 728 702 202.3
D 8 176 149079 733.48 728 702 202.3

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