ASTROSAT CZTI

Data Quality Report

Orbit 52437

Creation date: 2025-06-27T19:52:53.469213
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_52437cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52437cztM0_level2_quad_clean.evt
Size (bytes)734,071,68090,089,280
Size700.1 MB 85.9 MB
Events in quadrant A3,066,109705,324
Events in quadrant B3,553,793716,215
Events in quadrant C6,417,907576,726
Events in quadrant D13,627,426272,980

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0141742
B0154992
C0236072
D0449552

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6549520.794014%
B65491642.504199%
C654990513.818904%
D6549394260.192396%

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 7644 6550 21 21 0.27% 0.32%
B 7644 6550 58 58 0.76% 0.89%
C 7644 6550 788 788 10.31% 12.03%
D 7643 6548 3820 3820 49.98% 58.34%

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 13 248 74553 404.15 713 696 182.7
A 5 240 36495 195.89 713 696 182.7
A 11 3 34194 183.3 713 696 182.7
B 4 171 179674 1163.51 702 678 153.8
B 4 173 174010 1126.69 702 678 153.8
B 0 213 70355 452.91 702 678 153.8
C 0 225 1936925 10466.29 655 651 185.0
C 1 45 487781 2633.12 655 651 185.0
C 4 5 450653 2432.43 655 651 185.0
D 15 93 5384654 36420.97 503 479 147.8
D 12 17 4923413 33300.93 503 479 147.8
D 12 128 272295 1838.69 503 479 147.8

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