ASTROSAT CZTI

Data Quality Report

Orbit 57649

Creation date: 2026-05-25T09:46:12.032362
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/AS1A14_125T09_9000006578_57649cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57649cztM0_level2_quad_clean.evt
Size (bytes)1,323,080,640263,992,320
Size1.2 GB 251.8 MB
Events in quadrant A8,215,0641,780,739
Events in quadrant B9,503,9771,880,220
Events in quadrant C18,189,9681,492,409
Events in quadrant D11,616,9631,547,323

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03820
B03820
C03820
D03820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0385043
B0417083
C0672713
D0470513

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18745440.234729%
B187462681.429638%
C18746237412.664035%
D187464352.320495%

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 20295 18748 5 5 0.02% 0.03%
B 20296 18749 104 104 0.51% 0.55%
C 20296 18749 1899 1899 9.36% 10.13%
D 20296 18749 519 519 2.56% 2.77%

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 168231 335.16 2017 1964 496.1
A 3 14 108206 214.16 2017 1964 496.1
A 13 248 52697 102.27 2017 1964 496.1
B 0 216 452001 1072.97 1983 1904 419.5
B 10 247 249407 590.01 1983 1904 419.5
B 0 213 191811 452.71 1983 1904 419.5
C 15 224 8985408 17945.2 1841 1820 500.6
C 6 13 1228658 2450.67 1841 1820 500.6
C 14 254 268994 533.69 1841 1820 500.6
D 6 29 1480771 2725.68 1925 1835 542.6
D 2 172 549853 1010.0 1925 1835 542.6
D 3 12 399531 732.95 1925 1835 542.6

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