ASTROSAT CZTI

Data Quality Report

Orbit 52498

Creation date: 2025-06-25T15:14:29.986715
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_037T01_9000006476_52498cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52498cztM0_level2_quad_clean.evt
Size (bytes)392,270,40053,778,240
Size374.1 MB 51.3 MB
Events in quadrant A1,843,137387,699
Events in quadrant B2,347,984416,515
Events in quadrant C5,465,457235,117
Events in quadrant D4,555,537308,885

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0173
C0161
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110932527
B0128583103
C0230324106
D0230356765

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010828
B010923
C010921
D011430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4023491.217997%
B4009952.369668%
C3893141636.372977%
D389141010.537137%

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 7865 4177 23 23 0.29% 0.55%
B 7865 4174 68 68 0.86% 1.63%
C 7864 4026 1285 1285 16.34% 31.92%
D 7865 3983 501 501 6.37% 12.58%

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 11 3 32629 308.69 413 404 104.4
A 3 45 30905 292.17 413 404 104.4
A 13 248 26794 252.79 413 404 104.4
B 10 44 373231 4132.11 416 401 90.2
B 10 254 107503 1187.02 416 401 90.2
B 0 213 71931 792.77 416 401 90.2
C 15 224 3374423 40232.01 300 297 83.9
C 2 12 441504 5260.81 300 297 83.9
C 13 3 181559 2161.31 300 297 83.9
D 15 93 2516233 23584.43 369 353 106.7
D 12 17 159311 1490.11 369 353 106.7
D 6 42 111017 1037.39 369 353 106.7

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