ASTROSAT CZTI

Data Quality Report

Orbit 20210915_A09_131T01_9000004696_level2

Creation date: 2025-12-29T02:04:21.974936
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/AS1A09_131T01_9000004696cztM0_level2.fits modeM0/AS1A09_131T01_9000004696cztM0_level2_quad_clean.evt
Size (bytes)1,632,818,8801,911,052,800
Size1.5 GB 1.8 GB
Events in quadrant A10,198,22612,301,866
Events in quadrant B9,514,38012,092,659
Events in quadrant C9,915,43811,996,365
Events in quadrant D8,076,4449,761,769

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A034900
B034900
C034900
D034900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02370
B02380
C02380
D02380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03558110
B05595610
C03840520
D06671910

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17119920761.212624%
B17119981694.771640%
C17119957963.385534%
D1711992774616.206870%

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 205873 171199 0 0 0.00% 0.00%
B 205873 171185 0 0 0.00% 0.00%
C 205873 171015 0 0 0.00% 0.00%
D 205873 171012 0 0 0.00% 0.00%

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 0 29 10211 11.84 2657 2501 651.1
A 7 110 8354 8.99 2657 2501 651.1
A 0 30 7904 8.3 2657 2501 651.1
B 2 9 7730 10.76 2525 2420 493.6
B 2 8 6433 8.13 2525 2420 493.6
B 3 80 6429 8.12 2525 2420 493.6
C 12 241 7174 7.2 2630 2476 652.3
C 9 209 6834 6.68 2630 2476 652.3
C 3 187 6772 6.59 2630 2476 652.3
D 4 246 6248 6.77 2309 2100 612.5
D 10 189 5909 6.22 2309 2100 612.5
D 3 14 5895 6.2 2309 2100 612.5

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