ASTROSAT CZTI

Data Quality Report

Orbit 51983

Creation date: 2025-05-08T20:47:31.081195
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_51983cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51983cztM0_level2_quad_clean.evt
Size (bytes)2,358,455,040178,764,480
Size2.2 GB 170.5 MB
Events in quadrant A14,177,6851,376,795
Events in quadrant B15,917,0311,447,795
Events in quadrant C18,846,3601,129,775
Events in quadrant D37,074,856305,447

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0534294
B0587593
C0676403
D01213913

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03360
B03360
C03360
D03360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16698178010.659959%
B16698257415.415020%
C16699410824.600275%
D166991333579.855081%

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 17228 16702 1234 1234 7.16% 7.39%
B 17227 16699 1594 1594 9.25% 9.55%
C 17229 16702 3525 3525 20.46% 21.11%
D 17228 16698 12687 12687 73.64% 75.98%

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 64 4743950 11301.35 1679 1636 419.6
A 4 95 487907 1158.82 1679 1636 419.6
A 4 3 329510 781.35 1679 1636 419.6
B 4 206 2742456 7867.44 1641 1583 348.4
B 12 32 1746102 5007.49 1641 1583 348.4
B 8 128 1121238 3213.87 1641 1583 348.4
C 13 3 6284744 15242.12 1489 1476 412.2
C 15 224 4891414 11862.15 1489 1476 412.2
C 15 147 665689 1611.27 1489 1476 412.2
D 2 172 22692972 95042.42 826 787 238.8
D 7 126 4041306 16923.04 826 787 238.8
D 12 17 3058888 12808.34 826 787 238.8

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