ASTROSAT CZTI

Data Quality Report

Orbit 20211225_A11_086T01_9000004820_level2

Creation date: 2021-12-29T16:29:04.897479
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/AS1A11_086T01_9000004820cztM0_level2_bc.evt modeM0/AS1A11_086T01_9000004820cztM0_level2_quad_clean.evt
Size (bytes)13,752,400,3202,518,594,560
Size12.8 GB 2.3 GB
Events in quadrant A102,983,43115,603,432
Events in quadrant B68,447,92816,363,092
Events in quadrant C64,091,57116,549,101
Events in quadrant D167,735,03214,374,964

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07340
B07340
C07340
D07340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039820
B039800
C039800
D039820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06762430
B05064680
C04666180
D08375400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1954112703313.833919%
B19539788554.531799%
C19540432011.638145%
D1954033737319.126114%

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 267456 195396 697 697 0.26% 0.36%
B 267455 195452 594 594 0.22% 0.30%
C 267455 195454 512 512 0.19% 0.26%
D 267456 195455 11190 11190 4.18% 5.73%

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 15 169 36652976 17022.96 9876 9742 2152.6
A 15 237 26001184 12074.57 9876 9742 2152.6
A 14 4 1175387 541.51 9876 9742 2152.6
B 5 172 15318217 7555.83 10418 10210 2026.0
B 5 255 2509854 1233.79 10418 10210 2026.0
B 0 197 1876275 921.07 10418 10210 2026.0
C 15 214 8056748 3456.41 10336 10291 2328.0
C 9 187 4664097 1999.07 10336 10291 2328.0
C 3 233 4369686 1872.61 10336 10291 2328.0
D 12 235 60060910 26409.37 9544 9282 2273.9
D 8 195 38242136 16813.96 9544 9282 2273.9
D 2 250 7517309 3301.86 9544 9282 2273.9

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