ASTROSAT CZTI

Data Quality Report

Orbit 52870

Creation date: 2025-07-16T11:42:17.323639
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_011T08_9000006482_52870cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52870cztM0_level2_quad_clean.evt
Size (bytes)874,016,64073,082,880
Size833.5 MB 69.7 MB
Events in quadrant A13,951,848140,077
Events in quadrant B7,957,690530,445
Events in quadrant C3,849,167580,827
Events in quadrant D6,104,223519,155

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0457321
B0279991
C0160991
D0226701

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6333500579.030475%
B6334157824.913167%
C63342413.804863%
D633484713.372277%

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 7143 6333 4435 4435 62.09% 70.03%
B 7144 6335 1164 1164 16.29% 18.37%
C 7144 6335 184 184 2.58% 2.90%
D 7144 6335 730 730 10.22% 11.52%

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 9 191 11339493 105058.49 417 407 107.9
A 3 62 373184 3453.84 417 407 107.9
A 15 174 192477 1779.56 417 407 107.9
B 8 3 5058169 38418.76 616 595 131.6
B 5 185 114215 863.09 616 595 131.6
B 8 128 59571 448.0 616 595 131.6
C 2 12 650692 3640.8 638 630 178.5
C 7 80 221458 1236.79 638 630 178.5
C 13 3 204060 1139.35 638 630 178.5
D 8 176 1725277 9524.05 619 589 181.1
D 12 17 636905 3513.86 619 589 181.1
D 15 125 263805 1453.53 619 589 181.1

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